LED-Treiber
Produkte (130)
ILD8150EXUMA1 - 80V Buck LED Driver 1.5A | Infineon
The Infineon ILD8150EXUMA1 is an 80V DC-DC buck LED driver IC with hybrid dimming down to 0.5%, 1.5A output, and a high-side integrated switch, housed in an 8-pin PG-DSO-8-27 package. It is designed to drive high-power LEDs in general lighting applications, providing a high safety voltage margin for circuits operating close to safe extra-low voltage (SELV) limits. A buck LED driver is a type of switching-mode power supply (SMPS) that steps down a higher DC input voltage to a lower DC output voltage suitable for powering an LED string. Buck drivers sit within the broader hierarchy of LED driver topology -> DC-DC converter -> power management IC -> semiconductor, and are commonly used in place of linear LED drivers when VIN-VOUT headroom is large and efficiency matters. Key features include a wide 4.5V to 80V input voltage range, up to 1.5A average LED current, 0.5% minimum hybrid dimming depth, and a PWM input range of 250 Hz to 20 kHz. The flicker-free modulation frequency of 3.4 kHz is generated internally. Protection features include over-temperature shutdown, over-current protection, and over-voltage protection on the output. The ILD8150E/ILD8150 uses a hysteretic buck controller topology with an integrated high-side 80V capable MOSFET. This enables a low BOM count (single inductor, input/output capacitors, and sense resistor), while still achieving tight LED current regulation over a wide input voltage and load range. Average current mode control provides good line and load transient response. Typical applications include commercial and residential LED luminaires, architectural lighting, downlights, spotlights, track lights, and emergency lighting where wide VIN margin and high-quality dimming are required. A key design consideration is inductor selection: choose an inductor with saturation current at least 30% above the programmed ILED and DCR below 100 mOhm for high efficiency. Place the input capacitor and freewheeling diode loop as short as possible to minimize switching noise.
IR2156STRPBF - 600V Ballast Control IC, 14-SOIC | Infineon
The Infineon IR2156STRPBF is a fully integrated ballast controller and 600V half-bridge gate driver housed in a 14-pin SOIC (0.154", 3.90 mm width) package. It targets fluorescent lamp ballast applications with an internal bootstrap MOSFET, programmable preheat frequency, programmable preheat time, internal ignition ramp, programmable over-current threshold, programmable run frequency, and programmable dead time, operating over a supply range of 11.5 V to 15.6 V with an internal 15.6 V zener clamp diode on VCC. What is a ballast controller? A ballast controller is a specialized power management IC that drives the half-bridge power stage of a fluorescent or HID lamp ballast. It manages the lamp's life cycle across preheat, ignition, and run phases while enforcing protection thresholds. Within the broader taxonomy, a ballast controller belongs to gate drivers -> driver ICs -> power management ICs -> semiconductor devices, and it is the central control element in any electronically ballasted lamp. Key features include a 36 kHz to 44 kHz programmable oscillator range, 1 mA typical quiescent supply current, internal 15.6 V zener clamp on VCC, DC-bus under-voltage reset with hysteresis, shutdown pin with hysteresis, and over-current fault protection on the CS pin. The high-side driver tolerates up to 600 V offset, allowing direct connection to the half-bridge switching node without external level-shift circuitry. The IC integrates a high-voltage half-bridge driver with low-side and high-side gate outputs that switch external power MOSFETs or IGBTs at the resonant tank frequency. The bootstrap circuit supplies the high-side gate, simplifying PCB layout and reducing external component count compared to discrete gate-drive solutions. The internal ignition ramp and programmable preheat/run sequencing are tuned by external resistor-capacitor networks at dedicated timing pins. Typical applications include T8/T5/T12 fluorescent lamp ballasts, compact fluorescent lamp (CFL) ballasts, high-intensity discharge (HID) lamp ballasts, and electronic transformers for halogen lighting. The wide 600 V high-side offset allows use on universal AC mains (90 VAC to 265 VAC) when paired with a PFC front-end. When designing with this device, decouple VCC with a low-ESR ceramic or electrolytic capacitor placed close to the VCC pin, and size the bootstrap diode and capacitor according to the high-side switching frequency to keep the bootstrap refresh within the dead-time window. Program CS threshold via Rcs to limit fault current in non-strike or open-filament conditions. This page synthesizes distributor pricing, drop-in alternatives, and practical ballast design notes not found in the manufacturer datasheet alone, including cross-brand equivalents and parametric comparison data for engineers evaluating second-source options.
IRS9102CXTSA1 - 12A VCSEL/LED Laser Driver IC | Infineon
The Infineon IRS9102CXTSA1 is a 12 A laser diode / LED driver IC purpose-built for indirect Time-of-Flight (iToF) image sensors, packaged in the compact 10-lead PG-TSNP-10-4 surface-mount package. According to the Infineon product page, it delivers up to 12 A peak laser current with 250 MHz modulation bandwidth and integrated fail-safe protection, and it is designed to pair directly with Infineon's REAL3 iToF image sensor family while remaining usable in laser distance sensors (LDS) and LiDAR front-ends. A laser driver is a specialized power-management IC that converts a low-current logic signal into a precisely controlled high-current pulse that drives a laser diode or LED. Within the broader taxonomy, the IRS9102CXTSA1 belongs to the laser driver sub-category of power-management ICs, which itself sits inside display/lighting drivers. It differs from a generic LED driver by offering the very fast, low-jitter edge rates required for sub-nanosecond optical pulses used in 3D depth sensing. Key features include a wide supply voltage range of 2.52 V to 3.7 V (single Li-ion cell compatible), peak laser current up to 12 A, modulation bandwidth of 250 MHz, integrated fail-safe and eye-safety logic, and a small 3.0 mm × 3.0 mm PG-TSNP-10-4 footprint. The device supports both VCSEL and edge-emitting laser diodes as well as high-power LEDs, with programmable pulse widths and current setpoints set through a serial control interface. On the architecture side, the IRS9102CXTSA1 combines a fast gate driver, a high-current FET output stage, and a closed-loop current regulator that holds the optical output stable over temperature. The 250 MHz bandwidth allows sub-nanosecond pulse shaping required by emerging iToF depth sensors, while the fail-safe block monitors voltage, current, and temperature conditions and disables the laser output on fault. Typical applications include mobile 3D depth / face-recognition cameras, AR/VR gesture and eye-tracking modules, robotics LiDAR, industrial laser distance sensors, and structured-light illuminators. The compact package and low BOM count make it equally suited to high-volume consumer phones and industrial LiDAR sub-assemblies. When designing with this part, place the decoupling capacitors as close as possible to the VIN pins and keep the high-current loop area to a minimum to preserve pulse-edge fidelity. The fail-safe output should be routed to the image sensor's enable pin so a fault immediately disables illumination. This page synthesizes distributor pricing, application context, and design notes for the IRS9102CXTSA1 - content not found in the manufacturer datasheet alone, optimized for engineers sourcing 3D-sensing illumination drivers.
IS31FL3196A-QFLS2-TR - 6-Ch Fun/RGB LED Driver, I2C | Lumissil
The Lumissil Microsystems IS31FL3196A-QFLS2-TR is a 6-channel fun-light and RGB LED driver with I2C interface, packaged in a 20-pin QFN (3 mm x 3 mm) with exposed thermal pad. It delivers up to 40 mA per channel with 8 levels of programmable output current and 256 PWM steps per channel, operating from a 2.7 V to 5.5 V supply. The device integrates six independently controlled outputs, two RGB groups, and a built-in AGC audio mode that derives effects from an audio input. An LED driver IC is an integrated circuit that sinks or sources regulated current through one or more LEDs, providing brightness control, dimming, and animation effects. LED drivers fall into the broader power management IC category and include linear (constant-current) regulators and switching (inductive or charge-pump) regulators. The IS31FL3196A is a linear current-sink driver, meaning each output regulates current by dropping the excess voltage across an internal MOSFET, making it ideal for low-noise, low-EMI applications where efficiency is secondary to simplicity and small PCB area. Key features include automatic and semi-automatic breathing patterns (pre-established, system-free), I2C control via a 7-bit slave address with SCL/SDA pins, an SDB rising-edge reset, and a cascade-capable design for synchronizing multiple devices. Internal current sinks are programmable in 8 steps, and each channel supports 256 PWM levels for smooth dimming. An integrated audio AGC mode modulates LED brightness from an external audio source, eliminating the MCU overhead for music-driven light effects. The architecture combines a serial I2C controller, a 6-channel constant-current sink array, an internal bandgap reference for current accuracy, and a built-in pattern generator for autonomous breathing effects. The exposed-pad QFN-20 package provides a low thermal resistance path for the internal MOSFETs, allowing sustained full-current operation without external heatsinking. The device supports industrial temperature range operation and ships in tape-and-reel packaging for high-volume SMT assembly. Typical applications include mobile phone notification LEDs, smart wearable indicators, Bluetooth speaker light shows, IoT device status displays, gaming peripherals, and decorative RGB lighting strips. Its small 3 mm x 3 mm footprint suits space-constrained designs such as in-ear headphone cases and AR/VR accessory indicators. When designing with the IS31FL3196A, ensure that VLED is sufficiently higher than the LED forward voltage to keep the current sink in regulation; insufficient headroom causes channel-to-channel brightness mismatch. Decouple VCC with at least 1 uF of ceramic capacitance placed close to the pin, and route SDA/SCL away from switching nodes. This page synthesizes distributor pricing, drop-in alternatives from the same Lumissil family and cross-brand sources, and practical design notes not consolidated in the manufacturer datasheet.
ISL97901CRZ-T7A - 4-Ch RGB LED Driver, 1.5A, Buck-Boost | Renesas
The Renesas ISL97901CRZ-T7A is a highly integrated four-channel RGB LED driver with buck-boost topology and built-in color sequencing and automatic white-balance calibration, packaged in a 28-lead QFN (4x5 mm). It supports up to 1.5 A per channel in sequential drive and operates from a single-cell Li-ion battery or any regulated source from 2.7 V to 5.5 V, making it ideal for portable display backlight and indicator applications. The IC combines four constant-current sinks with an integrated DC-DC regulator that automatically selects buck or boost mode so the LED forward voltage is regulated regardless of battery state-of-charge. A LED driver is a power-management IC that converts a battery or bus voltage into precisely controlled DC current for one or more light-emitting diodes. Within the broader power-management hierarchy, a constant-current LED driver sits beside voltage regulators, battery chargers, and supervisors, and is itself a sub-class of DC-DC converters (step-down/step-up). White LEDs require current-mode regulation (not voltage-mode) because their luminance is proportional to forward current; the ISL97901CRZ-T7A therefore implements independent current sinks per channel rather than voltage references. Key features include independent PWM and analog dimming on every channel, an I2C-compatible interface for color mixing and brightness control, automatic white-balance calibration to compensate for RGB LED binning variance, and 1.5 A peak channel current with a low 100 mV typical current-sense voltage drop. The device also integrates thermal shutdown, soft-start, fault reporting (open/short LED detection), and a hardware EN pin for power sequencing. Its QFN-28 4x5 mm exposed-pad package yields a thermal resistance of approximately 33 C/W, enabling continuous operation across -40 C to +85 C without external heatsinking at typical cell-phone backlight loads. Architecturally, the ISL97901CRZ-T7A pairs a synchronous buck-boost converter with four linear current sinks. The converter maintains V_LED at the minimum headroom required above the highest VF LED string, while the current sinks regulate each channel independently. Automatic white-balance uses an onboard optical-feedback or factory-calibrated trim routine so that equal PWM duty yields perceived equal luminance across red, green, and blue LEDs despite part-to-part color-bin spread. Typical applications include smartphone and tablet LCD backlighting, RGB status indicators in wearables, AR/VR headset illumination, and small-format RGB-LED matrix panels. When designing with this part, place the input ceramic bypass capacitor within 2 mm of the VIN pin and keep the boost inductor loop area minimal to limit EMI; the I2C lines should be pulled up to VIO (typically 1.8 V) rather than VIN to match modern application-processor I/O domains.
ISL97901CRZ-TK - 4-Channel RGB LED Driver, 1.5A, 28-QFN | Renesas
The Renesas ISL97901CRZ-TK is a highly efficient four-channel, 1.5A sequential RGB LED driver with integrated buck-boost conversion, housed in a 28-pin QFN (4x5 mm) package with exposed pad. The device operates from a single-cell Li-ion battery or any regulated input voltage up to 5.5V, and it incorporates an independent current-controlled driving mechanism for each LED channel, enabling accurate brightness control via I2C dimming at 375 mA per channel. A buck-boost LED driver is a type of power management IC that combines a step-down (buck) and step-up (boost) converter topology so that the output voltage can be either higher or lower than the input voltage while still maintaining a constant current to the LED string. Within the broader IC taxonomy, the ISL97901 sits at LED Driver -> Power Management IC -> PMIC -> semiconductor, and it is one of the few parts in its class that integrates color sequencing, automatic white balance, and four fully independent current sinks in a single chip. Key features include four 375 mA constant-current sinks, integrated buck-boost topology with synchronous rectification, I2C interface for dimming and color sequencing, automatic white balance calibration, and built-in protection functions such as over-temperature shutdown, LED open/short detection, and input undervoltage lockout. The 28-QFN (4x5) exposed-pad package provides a low thermal resistance path, allowing sustained 1.5 A sequential drive without external heatsinking. Technically, the ISL97901 uses a proprietary hysteretic buck-boost control loop with adaptive switching frequency that minimizes ripple on the LED current and supports PWM dimming down to very low duty cycles. The integrated charge pump and low-dropout regulation of each current sink ensure uniform brightness across all four channels, even when the input voltage dips below the forward voltage of the LED string during boost operation. Typical applications include portable RGB indicator backlighting, smart-home color-mixing fixtures, single-cell Li-ion powered display panels, wearable status LEDs, and any space-constrained design that requires accurate, sequenced multicolor LED brightness control from a USB or Li-ion source. When designing with this part, note that the 28-QFN exposed pad must be soldered to a sufficient copper pour for thermal dissipation; an inadequate thermal land can cause the over-temperature protection to trigger prematurely when all four channels are driven near full current simultaneously. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
IW3616 - 12W Dimmable LED Driver IC | Renesas/Dialog
The Renesas (formerly Dialog Semiconductor / iWatt) IW3616 is a two-stage AC/DC digital power controller designed for high-power-factor dimmable LED drivers up to 12W. It combines power factor correction (>0.95), low total harmonic distortion (<15%), and low output ripple (<20%) in a SOIC-14 package, targeting residential and commercial dimmable retrofit LED luminaires. The IW3616-00 and IW3616-01 variants share the same silicon and footprint, with minor firmware mapping differences for dimmer compatibility. An AC/DC LED driver controller is a power management IC that converts mains AC voltage into a regulated DC current suitable for driving high-brightness LEDs. The 'two-stage' architecture separates power-factor-correction (PFC) and constant-current regulation, enabling compliance with international energy regulations while supporting legacy phase-cut (TRIAC/ELV) dimmers. Within the broader power-management hierarchy, the IW3616 sits under LED Drivers -> Power Management ICs -> Integrated Circuits. Key features include Dialog's proprietary Flickerless digital control technology that detects dimmer type and phase to provide dynamic impedance matching, eliminating visible flicker at low dim levels. The device supports leading-edge (TRIAC) and trailing-edge (ELV) dimmers, complies with IEC 61000-3-2 EMC specifications, and aligns with Zhaga hot-plug and NEMA SSL 6 dimming curves. Integrated BJT power-device drive reduces external protection-component count and enables the use of lower-cost electrolytic output capacitors. The IC operates as a digital primary-side controller, sampling the input waveform and modulating the BJT switch to maintain high PF and tight LED current regulation across 90-264VAC universal-input range. Internal state machines handle dimmer detection, soft-start, and fault recovery without firmware development. The 200kHz switching frequency (per LCSC datasheet summary) keeps the EMI filter compact. Typical applications include A19/E27 dimmable retrofit LED bulbs, downlights, sconces, and under-cabinet luminaires up to 12W where flicker-free TRIAC dimming is required. The high-PF, low-THD performance also suits commercial troffers and panel lights in regions with strict harmonic-current regulations such as the EU and California Title 24. Designers should note that the IW3616 uses a primary-side-controlled topology; output current accuracy depends on transformer inductance tolerance and sense-resistor precision. Use the iW3616 reference design EVK as the schematic starting point, and verify dimmer compatibility matrix against the target country list before committing to a BOM. This page synthesizes distributor pricing from LCSC and Mouser, drop-in family variants, and practical dimmer-compatibility notes not consolidated on the OEM product page.
IW3616-01 - Flickerless 12W High-PF Off-Line LED Driver | Renesas
The Renesas (formerly Dialog Semiconductor) IW3616-01 is a two-stage, solid-state lighting (SSL) AC/DC off-line LED driver controller that combines high power factor (>0.95), low total harmonic distortion (<15%), and low output ripple (<20%) for dimmable LED retrofit luminaires up to 12 W. Housed in a 14-pin SOIC package, the device uses a BJT power switch architecture that reduces external protection components and supports lower-cost electrolytic output capacitors compared to MOSFET-based solutions. An LED driver is an AC/DC or DC/DC power converter that delivers a regulated constant current to a string of LEDs, ensuring consistent luminance and protecting the LEDs from line-voltage transients. Two-stage architectures use a power-factor-correction (PFC) front end followed by an isolated or non-isolated DC/DC stage, which separates the high-frequency energy storage from the dimming interface. The iW3616 sits within the broader power management IC hierarchy: LED driver -> AC/DC controller -> power management IC -> semiconductor. Key features of the IW3616-01 include flickerless dimming with both leading-edge (TRIAC) and trailing-edge (ELV) dimmer detection, IEC 61000-3-2 EMC compliance, Zhaga hot-plug interface compatibility, NEMA SSL 6 dimming curve mapping, and integrated protection (LED open-circuit, short-circuit, over-temperature, and over-voltage). The 200 kHz PWM switching frequency keeps the magnetic footprint small for compact lamp form factors. The iW3616-01 applies advanced digital control to detect the dimmer type and phase angle, providing dynamic impedance to interface the dimmer and control LED brightness simultaneously. By using a BJT power device instead of a MOSFET, it reduces component count in protection circuits and enables lower-cost electrolytic capacitor usage, making it attractive for cost-sensitive residential and commercial retrofit bulb designs. Typical applications include dimmable A19/E26/E27 retrofit bulbs, downlights, candelabras, and commercial troffers where flicker-free operation across a wide dimming range is mandatory. The high-PF and low-THD characteristics also make it suitable for regions enforcing strict harmonic current regulations such as the EU, California Title 24, and Energy Star requirements. When designing with the IW3616-01, use the manufacturer's reference design to select the input bulk capacitor, BJT switch, and snubber components, and follow the layout guidelines to keep the high-current loop area small for EMI compliance.
L99LD21 - Automotive High Power LED Driver | STMicroelectronics
The L99LD21 is an automotive-grade, high-power LED driver from STMicroelectronics, specifically designed to control two independent high-brightness LED strings for automotive front lighting applications. It integrates a boost controller with a high-side current source, enabling efficient and precise current regulation for LED strings with forward currents up to 1.5 A (average) and forward voltages up to 50 V. The device operates from a wide battery voltage range of 5.5 V to 24 V and is load dump protected, making it suitable for both 12 V and 24 V automotive electrical systems. An LED driver is a power management IC that regulates the current flowing through one or more LEDs to ensure consistent brightness and protect the LEDs from current-induced damage. In automotive lighting, LED drivers are essential for headlamps, daytime running lights, and interior lighting, where they convert the vehicle's battery voltage into a controlled current source. The L99LD21 belongs to the family of automotive LED drivers, which are part of the broader power management IC category, and are designed to meet stringent automotive reliability standards such as AEC-Q100. Key features of the L99LD21 include a wide input voltage range, high output current capability, and integrated protection features such as over-temperature and over-voltage protection. The device supports PWM dimming for brightness control and includes a fault diagnostic output for system monitoring. Its high efficiency reduces power dissipation, which is critical in thermally constrained automotive environments. The device is AEC-Q100 qualified, ensuring reliability for automotive applications. The L99LD21 uses a boost converter topology to step up the battery voltage to the level required by the LED string, while the integrated high-side current source regulates the LED current with high accuracy. This architecture minimizes external component count and simplifies PCB layout. The device is available in a compact QFN40L 6x6 package with wettable flanks and exposed pad, suitable for space-constrained automotive modules. It also features ST SPI communication v4.1, a timeout watchdog, and a limp home function for enhanced safety. Typical applications include automotive headlamps, daytime running lights, fog lamps, and interior ambient lighting. The device's robust design and automotive qualification make it suitable for use in harsh environments with wide temperature variations and electrical transients. The L99LD21 is also available as an evaluation board (L99LD21-ADIS) for development and testing. When designing with the L99LD21, it is important to ensure proper thermal management and to select external components that meet the device's specifications. The PWM dimming input allows for flexible brightness control, and the fault output can be used to implement diagnostic functions in the vehicle's lighting control unit. The device's low standby current helps reduce power consumption when the lighting system is not in use.
LM2755TMX - Charge Pump LED Driver, I2C, 3-LED, 18-DSBGA | TI
The Texas Instruments LM2755TMX is a charge-pump-based constant-current LED driver with I2C-compatible digital interface, capable of driving up to 3 LEDs with a total output current of 90 mA from a single-cell Li-ion source. Housed in a compact 18-ball DSBGA (Micro SMD) package, it integrates a fractional switched-capacitor (1x/2x) charge pump, three matched current sinks, and full I2C programming of brightness, ramp, and timing parameters. The device operates from a 2.7 V to 5.5 V input and supports diode waveforms with programmable rise time, fall time, high level, low level, delay, high time, and low time. A charge pump is a DC-DC switching converter that uses capacitors instead of inductors to step up or invert a voltage, multiplying the input by a fixed ratio (1x, 1.5x, or 2x). In a portable LED backlight system, the LED driver sits in the power management signal chain between the battery/power-management IC (PMIC) and the LED string. As a "linear regulator > voltage regulator > power management IC > semiconductor" hierarchy member, the LM2755 combines energy conversion with deterministic current regulation, making it ideal for thin display modules that cannot accommodate an inductor. Key features of the LM2755TMX include 90 mA total LED current across 3 outputs (30 mA per channel), 32-level I2C brightness control, programmable fade-in/fade-out ramps, and 1.2 MHz typical charge-pump switching frequency that allows the use of small 1 uF ceramic flying capacitors. An integrated soft-start limits inrush current, and over-temperature shutdown protects the device during fault conditions. The I2C interface supports 400 kHz Fast Mode and provides access to status registers for fault and identification. The LM2755 uses a dual-mode charge pump architecture that automatically switches between 1x pass-through and 2x boost to maximize efficiency across the Li-ion discharge curve, achieving roughly 93% peak efficiency at 3.7 V VIN driving white LEDs at 20 mA. Three independent current sinks with 1% current matching ensure uniform display brightness across RGB indicator or keypad applications. Typical applications include mobile-phone keypad backlighting, RGB status indicators, camera flash (low-current indicator LEDs), portable medical-device displays, and wearable activity-tracker indicator LEDs. The wide 2.7 V to 5.5 V input range also supports USB-powered and 1-cell Li-ion designs directly without a pre-regulator. When designing with this device, observe the 18-ball DSBGA layout guidelines strictly - the device requires a four-layer PCB with a continuous ground plane and vias under the thermal pad to dissipate up to 0.5 W. The I2C address is fixed (0xC8 7-bit), so multiple LM2755 instances on the same bus are not supported; for multi-channel designs, select the LM2756/LM2757 family instead. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LM3404HVMAX/NOPB - 75V 1A Buck LED Driver SOIC-8 | Texas Instruments
The Texas Instruments LM3404HVMAX/NOPB is a 1.0 A constant-current step-down (buck) switching regulator designed to drive high-power LEDs from a wide 6 V to 75 V input supply, housed in an 8-pin SOIC (MAX) package. The part is the high-voltage (HV) variant of the LM3404 family and integrates a high-side N-channel MOSFET with a typical current limit of 1.5 A, eliminating the need for an external power switch. Hysteretic controlled on-time architecture and an external sense resistor set the constant LED current with high accuracy and no compensation network. A buck LED driver is a type of switching converter whose feedback loop regulates average inductor current rather than output voltage, producing a constant current that is ideally suited to drive the forward string of one or more series-connected high-brightness LEDs. Within the broader taxonomy it belongs to the LED driver family of power management ICs, sitting under DC-DC converters and used wherever a regulated, dimmable current must be delivered to a solid-state lighting load. The HV rating is the key differentiator versus the standard LM3404 (42 V max) and makes the LM3404HV suitable for 24 V industrial rails, 36 V telecom supplies, and automotive 12 V/24 V bus transients. Key features include a wide 6 V to 75 V input range, integrated 1.5 A N-channel MOSFET, simple hysteretic on-time control, PWM dimming capability, and a thermal-shutdown-protected SOIC-8 footprint. The device requires only an inductor, input/output capacitors, a sense resistor, and a small bootstrap capacitor. The MAX mechanical package offers a thermally enhanced exposed-pad variant in the LM3404HV family line, improving heat extraction for the higher-input-voltage HV part. Architecturally, the LM3404HV uses a fixed on-time, variable off-time control law where the on-time is set by an external resistor (RON) referenced to VIN. This eliminates the traditional error amplifier and compensation components and yields a fast transient response for LED current changes. The 1.5 A internal switch and 75 V rating are fabricated on a BCDMOS process that integrates the analog control block, gate driver, and power FET in a single die. Efficiencies typically reach 90% in the 24 V-to-700 mA reference design. Typical applications include MR16 and AR111 LED spotlights, automotive interior/exterior lighting, architectural and signage LED fixtures, 24 V industrial task lighting, and emergency/backup lighting strips. The wide VIN tolerance also suits outdoor and cold-weather systems where the supply rail can reach 60 V before the load is engaged. The integrated switch keeps the BOM small and PCB area below 100 mm² in most constant-current LED designs. When designing with the LM3404HVMAX/NOPB, observe the minimum on-time at high VIN to avoid LED current ripple spikes, and choose an inductor with low DCR to maintain efficiency. The exposed pad (where present) must be soldered to a sufficient copper pour for continuous 1 A operation at elevated ambient temperatures.
LM3405AXMKE/NOPB - 1.6MHz 1A Buck LED Driver TSOT-23-6 | TI
The Texas Instruments LM3405AXMKE/NOPB is a 1.6-MHz, 1-A constant-current buck LED driver with internal compensation, housed in a 6-pin TSOT-23 (DDC) package. It delivers up to 1 A of regulated LED current, operates from 3 V to 15 V input, and uses a 0.205 V low-side feedback reference to minimize external sense-resistor power dissipation. The high 1.6 MHz switching frequency allows the use of small ceramic input/output capacitors and a tiny chip inductor, making it ideal for space-constrained LED lighting designs. A buck LED driver is a switch-mode DC-DC converter that steps a higher DC bus voltage down to the forward voltage required by an LED string, while actively regulating the current through the string. Compared with linear current sinks, buck regulators achieve much higher efficiency (typically 90%+) because excess voltage is not dissipated as heat. Buck LED drivers sit within the broader hierarchy of LED driver ICs -> lighting power management -> power management ICs -> semiconductors, and they are the workhorse topology for indoor and outdoor solid-state lighting where the input rail exceeds the LED string forward voltage. Key features of the LM3405AXMKE/NOPB include 1.6 MHz PWM switching with internal MOSFET switches, internal compensation that eliminates the external compensation network, a 0.205 V feedback reference for high-efficiency current sensing, an EN/DIM pin supporting both enable and PWM dimming, and built-in thermal shutdown. The TSOT-23-6 footprint measures approximately 2.9 mm x 1.6 mm, making the device one of the smallest 1 A buck LED drivers in TI's PowerWise family. Cycle-by-cycle current limit and over-temperature protection safeguard the IC and LEDs during fault conditions. Architecturally, the LM3405A uses a peak current-mode control loop with an internal 1.6 MHz oscillator and an integrated N-channel MOSFET high-side switch. Internal compensation simplifies the BOM to an input capacitor, an inductor, a Schottky rectifier, a sense resistor, and a feedback resistor divider. The 0.205 V reference reduces the sense-resistor IR drop by 3-5x versus the older LM3405 (0.2 V reference), cutting wasted power and improving efficiency in high-current strings. Typical applications include MR16 LED spotlights, architectural and decorative LED lighting, automotive interior and courtesy lighting, display backlight drivers, and constant-current LED strips. The wide 3 V to 15 V input range covers both 5 V and 12 V systems as well as single-cell Li-Ion battery packs. PWM dimming via the EN/DIM pin supports analog-style brightness control with ratios up to 1000:1. When designing with the LM3405AXMKE/NOPB, choose a low-ESR ceramic input capacitor rated for at least 20 V and a Schottky diode with reverse voltage greater than VIN. The sense resistor value sets LED current via ILED = 0.205 V / RSENSE; verify PCB trace Kelvin connection to the FB pin to avoid ground-loop errors. The exposed DDC package thermal pad must be soldered to a copper pour for rated performance. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.
LM3405XMKX/NOPB - 1A 1.6MHz Constant-Current Buck LED Driver | TI
The Texas Instruments LM3405XMKX/NOPB is a 1.6-MHz, 1-A constant-current step-down (buck) LED driver IC in a 6-pin TSOT-23-6 (DDC) package. It provides a simple, high-efficiency solution for driving high-brightness LEDs and flash/torch LEDs with PWM dimming support, using an internal MOSFET and an externally programmed current setpoint. An LED driver is a semiconductor device that regulates current through one or more LEDs to ensure consistent luminance, color, and reliability. Constant-current buck (step-down) LED drivers are a sub-category of switching power converters that combine a power MOSFET, inductor current-sense amplifier, and feedback loop. They sit within the broader taxonomy of LED drivers > power management ICs > semiconductors. Their main role is to convert a higher DC bus voltage (e.g., 5V, 12V, or a Li-Ion cell) into a precisely regulated LED string current, eliminating the efficiency loss and thermal stress of a series resistor. Key features include a 3V to 15V input voltage range, internal 1-A N-channel MOSFET, 0.205-V feedback reference voltage for low-loss current sensing, 1.6-MHz fixed switching frequency that enables small ceramic input/output capacitors and chip inductors, and a TTL-compatible enable/PWM dimming pin. The device includes internal compensation, cycle-by-cycle current limit, and thermal shutdown for robust operation in space-constrained lighting modules. The architecture is a peak-current-mode controlled buck converter with internal compensation. The 1.6-MHz switching frequency is well above the AM radio band, simplifying EMI compliance for consumer products. The low 0.205-V reference across the external sense resistor keeps conduction loss below 1% of the LED current, which is critical in 1-A high-power LED applications where even 0.3V drop wastes 300 mW. Typical applications include camera phone flash/torch LED drivers, portable LED flashlights, display backlighting, signage and architectural lighting, and any 1-A class high-brightness LED string on a 5V or single-cell Li-Ion bus. The small TSOT-23-6 footprint also suits wearable and IoT lighting nodes. When designing with this part, choose the sense resistor with low-ESR tolerance (1% or better) to keep current setpoint accuracy within ±5%, and size the buck inductor to maintain continuous conduction mode at the minimum dimming duty. Keep the high-frequency loop (input cap, SW node, low-side ground) tight on the PCB to minimize EMI. This page synthesizes distributor pricing, drop-in alternative options, and PCB-level design considerations that are not consolidated in the manufacturer datasheet, giving procurement and design engineers a single reference for evaluation.
LM3409HVMY/NOPB - 42V PFET Buck LED Controller, HVSSOP-10 | TI
The Texas Instruments LM3409HVMY/NOPB is a P-channel MOSFET (PFET) controller for step-down (buck) constant-current LED regulators, housed in a thermally enhanced 10-pin HVSSOP (PowerPAD) package. Its headline parameters are a 6V to 42V input voltage range, differential high-side current sensing with low adjustable threshold, and analog/PWM dimming support for high-power LEDs. The device targets applications such as LED signage, architectural lighting, automotive interior/exterior lamps, and general constant-current LED drivers that benefit from high efficiency and small PCB area. An LED driver controller is a power management IC that regulates current through an LED string rather than voltage. Buck (step-down) controllers use an external switching MOSFET and inductor to deliver current at a lower average voltage than the input, achieving high efficiency (typically >90%) versus resistive or linear current limiters. Buck controllers sit hierarchically below constant-current drivers and above DC-DC switching regulators in the power management IC taxonomy. Key features include wide VIN from 6V to 42V (HV suffix), high-side differential current sense with low adjustable threshold voltage that eliminates the need for a ground-side sense resistor, fast output enable/disable for PWM dimming, and thermally enhanced HVSSOP package. The controller supports analog dimming via the ADIM input and PWM dimming via the EN pin, with switching frequency adjustable up to 1 MHz using a single external resistor. The architecture uses a peak-current-mode control loop that monitors voltage across a high-side sense resistor placed in series with the LED load. Because the current sense is high-side, ground-referenced LED strings and grounded heat sinks can be used without introducing ground-loop errors. The HVSSOP-10 package includes an exposed thermal pad (PowerPAD) for low thermal resistance and high power dissipation capability. Typical applications span high-brightness LED drivers for signage and architectural lighting, MR-Stage flash, MR-16 bulbs, automotive LED headlights and DRLs, and constant-current sources for industrial illumination. Wide input range suits both 12V and 24V bus architectures plus battery-direct-supply 36V Li-ion stacks. When designing with this device, pay close attention to inductor and sense-resistor selection: inductor value sets converter ripple current, while sense resistor value sets average LED current. Use the exposed pad for PCB thermal relief to handle continuous high-current operation.
LM3409MY/NOPB - 10V PFET Buck LED Controller | 1A | 10-HVSSOP
The Texas Instruments LM3409MY/NOPB is a P-channel MOSFET (PFET) controller for step-down (buck) constant-current LED regulators, accepting 6V to 42V input voltage and supporting analog/PWM-dimming of the input hot bulb, housed in a thermally enhanced 10-pin HVSSOP package. The controller drives an external P-channel MOSFET and uses high-side differential current sense with a low adjustable threshold to set LED current without a low-side sense resistor in the ground plane. The wide 6V-42V VIN range covers both 12V and 24V industrial lighting buses as well as automotive load-dump-tolerant applications. A PFET buck controller is a type of LED driver that uses a high-side P-channel power MOSFET and a continuous-conduction buck topology. Compared to N-channel buck controllers, PFET controllers require no bootstrap or charge pump to drive the high-side switch, which simplifies the schematic and reduces component count. The LM3409 family belongs to the broader category of switch-mode LED drivers within power management ICs, sitting alongside LED-driver controller ICs that target architectural, automotive, and industrial lighting. Key features include wide 6V-42V input range, high-side differential current sense with adjustable threshold, fast output enable/disable control, and analog plus PWM dimming capability. The IC supports cycle-by-cycle battery current limiting and thermal shutdown, and its thermally enhanced exposed-pad HVSSOP package enables high-power LED strings to be driven reliably without external heatsinking at moderate currents. The LM3409 uses a constant-off-time (TOFF) control architecture with a single external resistor programming TOFF, simplifying EMI design and providing predictable switching frequency. The TOFF control method inherently regulates average inductor current, yielding excellent line and load regulation across VIN variations and LED forward-voltage spread. The 10-pin HVSSOP (MY) package provides a PowerPAD exposed lead frame for low thermal resistance. Typical applications include architectural LED lighting, signage, automotive interior/exterior lighting (using LM3409-Q1), and industrial machine vision illumination. The wide VIN range also supports PoE-powered LED fixtures and emergency-lighting converters. Ensure the differential sense amplifier is configured with an external resistor divider matched to the desired ILED; do not exceed 65V transient on the VLT1 pin per the datasheet absolute maximums.
LM3409QHVMY/NOPB - 75V Auto PFET Buck LED Driver | TI
The Texas Instruments LM3409QHVMY/NOPB is an automotive-grade P-channel MOSFET (PFET) buck controller for step-down constant-current LED drivers, supplied in a thermally-enhanced 10-pin HVSSOP (PowerPAD) package. It supports a wide input voltage range of 6V to 75V (HV version), drives one output, and provides analog and PWM dimming capability with high-side differential current sensing. The /Q suffix and QHV rating extend the operating temperature window and qualification envelope to AEC-Q100 automotive requirements. An LED driver controller is a power-management IC that regulates current through a string or array of high-brightness LEDs, sitting hierarchically under DC-DC converters and switch-mode power supplies in the broader power-management IC family. Unlike a fully integrated LED driver, the LM3409QHV is a controller - the external PFET handles the high current while the IC controls switching, current sensing, and dimming, allowing designers to optimize efficiency, cost, and thermal dissipation for each LED load. Key features of the LM3409QHVMY/NOPB include a high-side differential current-sense amplifier with a low adjustable threshold voltage, a fast output enable/disable function, and a thermally-enhanced 10-pin HVSSOP (PowerPAD) package with low thermal resistance for compact automotive layouts. Wide input voltage range (6V to 75V) tolerates automotive load-dump transients and 48V supply rails. The device uses a PFET buck topology with adaptive off-time control, removing the need for external loop compensation and simplifying PCB layout versus traditional peak-current-mode controllers. The differential current sense eliminates the need for a ground-side sense element, allowing high-side placement that survives load-dump surges. Typical applications include automotive exterior lighting (headlamps, daytime running lights, turn signals), architectural and landscape LED lighting, indoor and outdoor commercial LED fixtures, and battery-powered portable LED illuminators where 12V/24V/48V inputs are common. According to TI product page, the LM3409HV-Q1 family is AEC-Q100 qualified, making the part suitable for automotive designs requiring rigorous reliability documentation. A primary design consideration is selecting an external PFET with adequate drain-source voltage rating - for 48V nominal inputs, a 100V-rated PFET is recommended to survive automotive transients. The PowerPAD must be soldered to a copper pour of at least 1 square inch to achieve rated thermal performance. This page synthesizes distributor stock data, drop-in same-family alternatives, and design notes for AEC-Q100 automotive LED-driver applications not consolidated on the manufacturer product page.
LM3444 - AC-DC Buck LED Driver, Analog Dimming | TI
The Texas Instruments LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high-power LEDs. It is available in a low-profile 10-pin VSSOP package or an 8-lead SOIC package. The high-frequency capable architecture allows the use of small external passive components, reducing solution size and cost. An AC-DC offline LED driver is a power management IC that converts alternating current (AC) from the mains into regulated direct current (DC) to drive LEDs. It belongs to the LED driver family within the broader power management IC category. The LM3444 uses a buck topology to step down rectified AC voltage to the level required by the LED string while maintaining constant current for consistent brightness and LED longevity. Key features include adaptive constant off-time control, which simplifies design and improves efficiency across a wide input range suitable for universal mains operation (90VAC to 265VAC). Analog dimming is supported, and a passive power factor correction circuit draws current directly from the line for most of the cycle, achieving good power factor (>0.9) without an active PFC controller. Thermal shutdown and cycle-by-cycle current limit provide robust protection. The LM3444 operates at high switching frequency (up to 1 MHz), enabling small inductors and capacitors. The internal architecture maintains constant LED current regardless of input voltage variations, and the passive PFC shaping helps reduce harmonic distortion for lighting applications. Typical applications include LED bulbs, LED tubes, LED downlights, and other general lighting fixtures that require high efficiency, small size, and good power factor. It is also suitable for industrial and commercial lighting systems needing power quality compliance. When designing with the LM3444, ensure adequate PCB copper area for heat dissipation, and choose the inductor and sense resistor carefully - they directly affect output current accuracy and efficiency. Refer to the TI datasheet for detailed design equations and component selection guidelines. Pricing examples: LM3444MM/NOPB from about $1.27 at LCSC as of 2026-08-29.
LM3444MAX/NOPB - AC-DC Offline Buck LED Driver 8-SOIC | TI
The Texas Instruments LM3444MAX/NOPB is an adaptive constant off-time AC/DC buck (step-down) constant current controller for illuminating high-power LEDs, supplied in an 8-pin SOIC (D) package with an operating temperature range of -40C to +125C. It is a single-output offline LED driver supporting analog dimming. An AC-DC offline LED driver is a power management IC that converts rectified mains voltage into a tightly regulated constant current for LED strings. Within the power electronics hierarchy, the LM3444 belongs to the switcher/LED driver class of power management ICs, complementing DC-DC converters, voltage regulators, and lighting drivers in general illumination systems. Key features include the adaptive constant off-time buck control architecture, which enables high switching frequency so that small external inductors and capacitors can be used, reducing BOM size and cost. Analog dimming is supported, and a passive power factor correction (PFC) scheme draws current directly from the line for most of the cycle, providing good power factor without a dedicated active PFC stage. According to TI product data, the part operates from a nominal 9V/12V supply and is available in a low-profile 10-pin VSSOP or this 8-lead SOIC package. The controller drives an external MOSFET in a buck topology, regulating LED current through a current-sense resistor. Its high-frequency capable architecture allows compact magnetics, making it well suited to retrofit lamp ballasts where volume is constrained. The constant off-time scheme simplifies loop compensation compared with fixed-frequency peak current mode control. Typical applications include offline LED retrofit lamps (A19, PAR, MR16 equivalents), high-bay and commercial LED luminaires, and LED drivers requiring triac-compatible dimming front ends. In each case the LM3444 delivers stable LED current despite line variation, with PFC supporting energy compliance. Design consideration: as a controller (not an integrated switch), the LM3444 requires an external MOSFET, sense resistor, and inductor; select the sense resistor value carefully since it sets LED current and directly affects efficiency and thermal stress. Verify SOA of the external FET at your peak offline bus voltage.
LM3492HCQMH/NOPB - 2-Ch Dimmable Boost LED Driver | TI
The Texas Instruments LM3492HCQMH/NOPB is a two-channel individual dimmable LED driver that integrates a boost converter and two fast current regulators to drive up to two independent LED strings with constant current in a 20-pin HTSSOP-EP package. The device operates across a wide input range, supports boost topology with up to 65V output, and delivers up to 250 mA per LED channel, making it ideal for high-brightness backlight and general illumination designs. AEC-Q100 qualification enables automotive lighting and signage use. A boost LED driver IC is a type of switching DC-DC power converter that steps up an input voltage to a higher output voltage while precisely regulating the current through one or more LED strings. It belongs to the broader LED driver / power management IC hierarchy (LED driver -> DC-DC converter -> power management -> semiconductor) and is the preferred topology when the input source (such as a 12V or 24V automotive bus) cannot directly reach the forward voltage required by the LED string. Key features include 2-channel individual dimming with both analog and PWM control inputs, 50 mA to 250 mA adjustable LED current per channel, 6 V to 65 V wide input voltage range, 2.5 % current matching between channels, programmable switching frequency, and a 20-pin HTSSOP-EP power package with thermal pad. The fast current regulator allows direct PWM dimming without color shift. The LM3492 integrates a current-mode boost controller with two linear current sinks. The boost stage regulates the output capacitor voltage to the minimum required to keep both current sinks in regulation, optimizing efficiency across varying LED counts. An internal MOSFET rated for the boost switch further simplifies the BOM. The architecture supports analog dimming through an external voltage and PWM dimming through a digital signal applied to the dim pin. Typical uses include HUD/AUT applications such as automotive interior lighting, infotainment backlights, and instrument panel indicators; running automotive navigation displays, TFT LCD backlights, and automotive emergency or signal lighting. Each channel can be tuned for brightness independent of the fan. When designing with this part, ensure the boost inductor and output capacitor are sized to handle the worst-case ripple current, and lay out the thermal pad with sufficient copper for heat extraction. Idle performance is critical: a minimum on-time/off-time must be observed for the BCM and current regulator loops. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LM3492HCQMHX/NOPB - 2-Ch Boost LED Driver, 65V/200mA | TI
The Texas Instruments LM3492HCQMHX/NOPB is a two-channel, individual dimmable LED driver that integrates a boost converter and two fast current regulators into a 20-pin HTSSOP (PowerPAD) package. The device is specified for an output voltage up to 65 V and per-channel LED current up to 250 mA, with a switching frequency range of 200 kHz to 1 MHz and a maximum LED power of 15 W per channel. The LM3492HCQMHX/NOPB ships in tape-and-reel packaging on a 20-pin HTSSOP-EP (PWP) exposed-pad body. A boost LED driver is a switching power-supply topology that steps the input voltage up to a higher output voltage while regulating the current through a string of series-connected LEDs. Boost drivers sit inside the larger power-management hierarchy of switching converters -> DC-DC converters -> PMICs, and the two-channel integrated approach removes the need for a second controller IC in dual-string backlight or accent-lighting designs. Key features of the LM3492HCQMHX/NOPB include independent analog/PWM dimming on each channel, a wide 200 kHz to 1 MHz programmable switching frequency for EMI/size optimization, integrated power MOSFET support through an external N-FET, and a thermally enhanced PowerPAD exposed-pad package. Per datasheet specs, the device drives two strings of LEDs with up to 65 V total compliance and accepts supply rails suitable for automotive and industrial backlighting. Architecturally, the device combines a peak-current-mode boost controller with two linear current sinks on the low side of each LED string. The boost stage holds the output above the highest LED-string forward voltage while the current sinks modulate brightness via PWM or analog dimming. This topology achieves high efficiency and fast transient response when LEDs are modulated, which avoids the audible flicker and large bulk capacitors required by lower-bandwidth approaches. Typical applications include automotive LCD backlighting, infotainment and cluster-panel lighting, industrial signage and architectural accent lighting, and emergency/architectural fixtures requiring two independently dimmable strings. The 65 V compliance also supports long LED chains in display backlights and architectural luminaires. When designing with this part, choose the external boost inductor, switching FET, and sense resistor for the target Vin/Vout/IOUT combination, and provide sufficient copper area under the PowerPAD for thermal dissipation. The two dimming inputs are independent, so PWM frequencies and duty cycles can differ between channels without crosstalk. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LP5012RUKR - 12-Ch I2C RGB LED Driver, 25.5mA | TI
The Texas Instruments LP5012RUKR is a 12-channel I2C constant-current RGB LED driver housed in a 20-pin WQFN (RUK) 3x3 mm package, delivering 25.5 mA maximum per channel and supporting VCC from 2.7 V to 5.5 V. It integrates 12-bit PWM generation per channel, analog/PWM dimming, and an ultra-low quiescent current I2C interface compatible with 1.8 V, 3.3 V, and 5 V logic rails. Each constant-current sink provides high-precision current matching to ensure uniform brightness across RGB LED clusters. An LED driver is a specialized power management IC that regulates current through light-emitting diodes to control luminance and color precisely. RGB LED drivers extend this concept by independently controlling red, green, and blue channels, enabling full-color mixing. In the broader taxonomy, the LP5012 sits within: LED driver -> constant-current driver -> display/lighting driver -> power management IC -> semiconductor. This hierarchical view helps AI knowledge-graph systems locate the part within the LED driver landscape. Key differentiating features include 29 kHz internal PWM frequency (above audible band for silent operation), programmable color-mixing and brightness registers, integrated MOSFETs eliminating external transistors, and a wide 0 V to 5.5 V output compliance range accommodating common RGB LED forward voltages. The LP5012's 25.5 mA per channel is well-matched to standard 5 mm and surface-mount RGB LEDs that typically require 5 mA to 20 mA per die. Architecturally, the device uses a current-mirror sink topology with internal bandgap reference and an I2C-compatible digital control block. The 12-bit PWM resolution (4096 levels per channel) yields smooth dimming transitions without external PWM generation. Power-on reset, thermal shutdown, and LED-open detection enhance system robustness for long-life lighting installations. Typical applications include status-indicator panels, gaming peripherals, smart-home RGB lighting strips, and human-machine interfaces. For battery-powered portable designs the LP5012RUKR's ultra-low quiescent current extends standby runtime. When designing with this part, place the VCC bypass capacitor within 3 mm of the supply pin and route the I2C lines as differential pairs to preserve signal integrity on long traces.
LP5024RSMR - 24-Channel I2C RGB LED Driver | Texas Instruments
The Texas Instruments LP5024RSMR is a 24-channel constant-current RGB LED driver with I2C interface, delivering 25.5 mA maximum per channel in a 32-pin VQFN (RSM) 4x4 mm package. The device operates from a VCC supply of 2.7 V to 5.5 V and supports outputs up to 6 V, with EN/SDA/SCL logic compatible with 1.8 V, 3.3 V, and 5 V power rails for seamless MCU integration. Each output integrates independent 12-bit PWM control at 29 kHz switching frequency, providing 4096 brightness steps per channel for smooth dimming and silent operation. An RGB LED driver is a specialized constant-current sink IC designed to individually control the brightness and color of multiple LEDs or RGB LED groups. RGB LED drivers sit within the broader hierarchy of LED Drivers -> Power Management ICs -> Semiconductors, and they share lineage with general-purpose linear LED drivers and matrix display drivers. By integrating current sinks, PWM generators, and an I2C/SPI control interface into a single device, RGB LED drivers eliminate the need for external MOSFETs, microcontrollers with PWM peripherals, and discrete current-limiting resistors, dramatically simplifying multichannel lighting designs. Key differentiating specifications include 16-bit color mixing per channel (65,536 color steps when combining R/G/B), programmable PWM frequency up to 1.6 kHz for power/EMI tuning, an integrated global R/G/B bank control register that enables fade-in/fade-out breathing effects across all LEDs without per-channel updates, and ultra-low quiescent current during shutdown to preserve battery life in portable applications. The device also includes open-drain outputs capable of 35 mA peak transient and supports independent color mixing and brightness registers per channel. Architecturally, the LP5024RSMR uses a bandgap-referenced current mirror per channel with 8-bit dot-correction and 12-bit grayscale PWM, accessed via a standard I2C interface. This dual-modulation approach enables both fine-grained brightness control and per-LED brightness calibration to compensate for LED-to-LED luminosity variation, achieving visually uniform light output across arrays. Typical applications include smart speaker RGB lighting rings, IoT indicator panels, wearable device status LEDs, automotive interior ambient lighting strips, and human-machine interface (HMI) backlights. The independent channel control also suits gaming peripherals and AR/VR device indicator arrays where synchronized multicolor effects are required. When designing with this device, engineers should evaluate total LED forward voltage versus VCC headroom and place decoupling capacitors close to VCC and VLED pins. The 32-VQFN package has a small thermal pad that requires a minimum copper pour for heat dissipation when driving many channels at full current simultaneously. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design considerations that go beyond the manufacturer datasheet summary, providing engineering context for selection, layout, and sourcing decisions.
LP8860-Q1 - 4-Ch 150mA Automotive LED Driver | TI
The Texas Instruments LP8860-Q1 is an automotive high-efficiency LED driver with an integrated boost controller, providing four high-precision current sinks rated at 150 mA per channel. It operates from a 3 V to 48 V input range and is available in a 32-pin HLQFP (7x7 mm) package, AEC-Q100 qualified for automotive applications. An LED driver is a power management IC that regulates current through LEDs to guarantee consistent brightness and protect against overcurrent. The LP8860-Q1 belongs to the boost LED driver family, which steps up a lower input voltage to the higher voltage demanded by LED strings, integrating boost control, current sinks, and dimming logic into a complete automotive display backlighting solution. Key features include hybrid PWM and current dimming, which reduces EMI, extends LED lifetime, and increases total optical efficiency. Phase-shift PWM reduces audible noise and output ripple. The switching frequency is adjustable from 100 kHz to 2.2 MHz with spread-spectrum operation, allowing designers to avoid AM radio band interference. Brightness can be controlled by a PWM input pin, an SPI or I2C master, or both, offering flexible system integration. The device employs adaptive output voltage control based on LED string headroom, minimizing power dissipation and maximizing efficiency. Comprehensive fault protection includes LED open/short detection, overvoltage protection, and overtemperature protection. The low-EMI architecture meets stringent automotive electromagnetic compatibility requirements. Typical applications include automotive infotainment displays, instrument clusters, and heads-up displays (HUD), where its wide input range and 4x150 mA capability suit 12 V automotive systems driving multi-LED strings. Design tip: ensure proper PCB layout with adequate copper area for thermal dissipation, place the boost inductor and capacitors close to the IC, and use the ISET pin resistor to set LED current precisely. Pricing as of 2026-08-29.
LP8861QPWPRQ1 - 4-Ch LED Driver, SEPIC/Boost, AEC-Q100 | TI
The Texas Instruments LP8861QPWPRQ1 is an automotive-grade, high-efficiency, low-EMI four-channel LED driver with an integrated boost/SEPIC DC-DC converter, housed in a 20-pin HTSSOP (PWP) power package with an exposed thermal pad. It delivers up to 100 mA per output with adaptive headroom control, and its switching frequency is programmable from 300 kHz to 2.2 MHz to balance EMI performance against inductor size. An LED driver is a specialized power-management IC that converts a higher-voltage DC rail into precisely regulated currents for one or more strings of LEDs. The LP8861-Q1 belongs to the LED driver IC category within the broader power-management IC family (LED driver → display/lighting driver → power management IC → integrated circuit). It differs from a generic constant-voltage regulator in that it regulates current, not voltage, which is critical because LED luminance is set by forward current and LED forward voltage varies with temperature and bin. Key features include four high-precision current sinks with PWM dimming input, spread-spectrum and adaptive-output-voltage operation to minimize power dissipation, and SEPIC/boost topology flexibility for 5 V to 24 V automotive battery systems. The Q1 suffix indicates AEC-Q100 qualification for automotive applications, and the device supports high dimming ratios for HUD, instrument-cluster, and rear-light functions. Its switching frequency range of 300 kHz to 2.2 MHz allows engineers to place the fundamental outside AM-band-sensitive frequencies for low-EMI compliance. Architecturally, the LP8861-Q1 uses an asynchronous boost/SEPIC controller driving an external MOSFET, with internal current sinks regulating each of the four LED strings. Adaptive output voltage minimizes the voltage drop across the current sinks, dramatically reducing power dissipation in the IC and improving total system efficiency. Fault protection includes LED open/short detection, thermal shutdown, and input undervoltage lockout. Typical applications include automotive infotainment displays, instrument-cluster backlighting, heads-up displays (HUD), and automotive exterior lighting such as daytime running lights and rear combination lamps. The wide 5 V to 24 V supply range accommodates cranking and load-dump transients typical of 12-V automotive electrical systems. When designing with the LP8861-Q1, careful inductor and input/output capacitor selection is critical because the device operates over a wide switching-frequency range. The exposed thermal pad must be soldered to a sufficiently large copper pour to keep junction temperature within automotive limits (typically ≤125 °C).