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TEA2226AT/1 - Digital Configurable LLC Resonant Controller | NXP
The NXP Semiconductors TEA2226AT/1 is a digital configurable controller for high-efficiency resonant (LLC) power supplies, delivered in a 16-pin SO (SOIC) surface-mount package. It integrates a high-voltage silicon-on-insulator (SOI) controller for high-voltage start-up, integrated gate drivers, a level shifter, protection circuitry, and circuitry that ensures zero-voltage switching (ZVS). A resonant LLC controller is a type of switched-mode power-supply (SMPS) control IC that drives a half-bridge resonant converter operating at or near the resonant frequency of an LC tank. Within the power management hierarchy (AC-DC controller -> resonant converter controller -> power management IC), LLC topologies enable very high efficiency and low electromagnetic interference because switches toggle under zero-voltage switching conditions, minimizing switching losses. Key features of the TEA2226AT include fully digital configurability, which dramatically reduces external component count and simplifies power-supply design; integrated high-voltage start-up circuitry that removes the need for a separate auxiliary low-power start-up supply; built-in drivers and level shifting for the high-side and low-side bridge switches; and comprehensive protection functions. According to NXP, supplies built on this controller meet efficiency regulations including Energy Star, the US Department of Energy (DoE), the EU Eco-design directive, and the European Code of Conduct. The digital architecture allows designers to configure operating parameters in firmware or via configuration rather than hard-wired analog networks, enabling one controller platform to serve multiple power levels and output configurations. This shortens design cycles and supports platform strategies across product families. Typical applications include high-efficiency AC-DC adapters and power supplies for consumer electronics, audio power amplifiers, servers and set-top boxes, and industrial auxiliary supplies where efficiency regulations drive topology choice. The TEA2226AT is commonly paired with an upstream PFC controller such as the NXP TEA2376DT in two-stage designs. When designing with this controller, verify start-up behavior with the integrated high-voltage SOI stage and observe NXP application guidance for burst-mode operation at light load to maximize standby efficiency. This page synthesizes distributor availability, alternatives context, and practical design notes not found in the manufacturer datasheet, providing added selection value beyond raw specification listings.
TEA2226AT/1Y - Digital Configurable LLC Controller | NXP
The NXP Semiconductors TEA2226AT/1Y is a digital configurable LLC resonant converter controller for high-efficiency AC-DC power supplies, housed in a 16-pin SOIC (SO16) package with a supply voltage window of 18.2 V to 19.7 V. An LLC controller governs a resonant half-bridge topology in which two MOSFET switches drive a series resonant tank (inductor-capacitor-inductor) through a transformer. By modulating the switching frequency, the controller regulates the output while the tank naturally achieves zero-voltage switching (ZVS), dramatically cutting switching losses compared with conventional hard-switched PWM converters. LLC controllers sit at the heart of the power management IC hierarchy, above generic PWM controllers and alongside PFC controllers in complete AC-DC solutions. Key features of the TEA2226AT include a digital configurable architecture that enables power supply design with a very low component count, integrated gate drivers, and an internal level shifter for the high-side switch. The device contains a high-voltage silicon-on-insulator (SOI) controller stage for direct high-voltage start-up, eliminating the need for an auxiliary low-power startup supply. On-chip circuitry ensures zero-voltage switching under normal operation, and a suite of integrated protections guards the converter against fault conditions. Architecturally, the TEA2226AT combines digital configurability with the robustness of an SOI high-voltage process. Digital configuration allows the resonant control behavior to be tailored to the application without extensive external analog component tuning, shortening design cycles and improving consistency between units. Typical applications include notebook and desktop adapter power supplies, server and telecom rectifier stages, and consumer electronics adapters that must meet Energy Star, US Department of Energy (DoE), European Union Ecodesign, and European Code of Conduct efficiency regulations. Design-wise, verify that the SUPHS floating supply for the high-side driver stays within the 18.2 V to 19.7 V window, and follow the NXP datasheet guidance for bootstrap and protection component selection. This page synthesizes distributor availability data, the manufacturer datasheet, and practical design notes not found on the standard distributor product pages.
TEA2376DT - Digital Interleaved PFC Controller | NXP
The NXP Semiconductors TEA2376DT is a digital configurable two-phase interleaved PFC (power factor correction) controller for high-efficiency AC-DC power supplies, operating in discontinuous conduction mode (DCM) or quasi-resonant (QR) mode with valley switching at 25 kHz to 300 kHz, housed in a 14-pin SO-14 (SOIC-14) surface-mount package. A PFC controller is a power management IC that shapes the input current waveform of a switch-mode power supply so that it follows the input voltage, raising the power factor toward unity and reducing harmonic distortion. Within the power-supply control hierarchy - AC-DC converter, PFC pre-stage, PWM main converter - the PFC controller governs the boost converter front end and is essential for meeting international mains harmonics requirements in equipment above roughly 75 W. Key features of the TEA2376DT include digital configurability that reduces external component count, two-phase interleaved operation that halves input ripple current and spreads thermal stress across two boost switches, valley switching that minimizes MOSFET turn-on losses, and phase shedding with burst mode for high efficiency at light load. Technically, the device runs a digitally controlled regulation loop that can be tuned through configuration, supporting both discontinuous and transition conduction modes across a 25 kHz to 300 kHz switching range. NXP documents typical system power levels up to 1000 W, noting that high switching frequency and high power applications require attention to IC package thermal limits. The companion TEA2209T is used for the main converter stage in reference designs such as the 1 kW TEA2376DB1623 evaluation board. Typical applications include TV power supplies, computing and server power supplies, and industrial AC-DC power systems where efficiency standards such as 80 PLUS class targets and low standby power drive the architecture. When designing with the TEA2376DT, verify thermal dissipation of the SO-14 package at the target switching frequency and output power, and configure phase shedding thresholds to maximize light-load efficiency without audible noise. This page synthesizes distributor data, the NXP datasheet, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
TEA2376DT-1Y - Interleaved PFC Controller, 25-300kHz | NXP
The NXP Semiconductors TEA2376DT/1Y is a digital configurable two-phase interleaved PFC (power factor correction) controller for high-efficiency AC-DC power supplies, operating in discontinuous conduction mode (DCM) or quasi-resonant (QR) mode with valley switching, across a 25 kHz to 300 kHz switching-frequency range, housed in a 14-pin SO (SO14) surface-mount package. A PFC controller is a power management IC that shapes the input current waveform of an AC-DC converter to follow the input voltage, achieving a high power factor and low harmonic distortion as required by IEC harmonics regulations in modern off-line power supplies. Interleaved two-phase topologies split the PFC power stage into two parallel, phase-shifted branches, halving input ripple current and easing EMI filter design. Key features of the TEA2376DT include digital configurability via a high-speed configurable hardware state machine, which ensures reliable real-time control without firmware; valley switching in QR mode to reduce switching losses; and integrated protections such as cycle-by-cycle current limiting and overvoltage protection for robust operation. Under light load, the controller supports phase shedding, in which one interleaved phase is disabled, combined with burst mode operation to maintain high efficiency down to very low output power - a key requirement for energy-efficiency standards in TVs, computing and server PSUs. Typical applications include television power supplies, desktop PC and server power supplies, and industrial AC-DC systems. NXP's TEA2376DB1623 reference design demonstrates a 1 kW standalone two-phase interleaved PFC using the TEA2376DT paired with the TEA2209T X-capacitor discharge controller. Design consideration: with a two-phase interleaved stage, careful PCB layout balancing both phase current loops and routing the two gate-drive outputs symmetrically is essential to guarantee equal current sharing between phases. This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing and stock data, drop-in family alternatives, and practical engineering notes in one place.
TEA6017AT/1 - Digital LLC + Multimode PFC Controller | NXP
The NXP Semiconductors TEA6017AT/1 is a digital configurable LLC and multimode PFC combo controller for high-efficiency resonant power supplies, covering a 50 kHz to 200 kHz switching range and integrating both LLC and PFC controller functionality in a single low-profile, narrow-body SO16 package. A PFC (power factor correction) controller shapes the input current of an AC-DC power supply so that it follows the input voltage waveform, minimizing harmonic distortion and meeting regulatory requirements such as IEC harmonic limits. In the broader power-management hierarchy, it sits within the class of power supply control ICs and power controllers. The TEA6017AT/1 combines this PFC function with an LLC resonant converter controller, the topology of choice for high-efficiency, low-EMI isolated DC-DC stages in modern AC-DC supplies. Key features include PFC operability in DCM/QR, CCM fixed-frequency, or multimode operation, allowing designers to optimize efficiency across the entire load range. The digital architecture is based on a high-speed configurable hardware state machine, delivering very reliable real-time performance without firmware. Complete resonant power supply functionality is achieved with a very low external component count, reducing BOM cost and board area. Technically, the device is the industrial-market equivalent of the TEA2017AAT with improved driver performance, improved ESD performance, and enhanced reliability, per NXP product information. The hardware state machine implements protection and control timing deterministically, which simplifies compliance-focused designs. Applications include notebook adapters, USB-PD fast chargers, TV power supplies, and industrial AC-DC systems where high efficiency and low standby power are mandatory. A key design consideration is configuring the PFC mode (DCM/QR, CCM, or multimode) to match the target power level and efficiency curve; multimode operation yields the best light-load efficiency. Ensure adequate creepage and gate-drive layout discipline around the LLC and PFC driver outputs. This page synthesizes distributor pricing, verified drop-in alternatives, design notes, and parameter comparisons not found in the manufacturer datasheet.
TL494CDT - PWM Controller IC | STMicroelectronics | SMPS
The TL494CDT is a fixed-frequency pulse-width modulation (PWM) control circuit from STMicroelectronics, designed primarily for switch-mode power supplies (SMPS). It integrates all the functions required for a single-ended or push-pull switching power supply, including an internal oscillator, error amplifiers, a 5V reference, and output control logic. The device operates from a supply voltage of 7V to 40V and is available in a 16-pin SOIC (SOP-16) package, making it suitable for compact power supply designs. A PWM controller is a specialized integrated circuit that generates a variable-duty-cycle square wave to regulate the output voltage of a switching power supply. It compares a feedback signal to a reference voltage and adjusts the duty cycle of the output transistors accordingly. The TL494 belongs to the family of voltage-mode PWM controllers, which are widely used in offline and DC-DC converters due to their simplicity and robustness. This category sits within the broader hierarchy of power management ICs, which also includes linear regulators, switching regulators, and battery management devices. Key features of the TL494CDT include a complete PWM power-control circuitry, an uncommitted output for single-ended or push-pull operation, an internal oscillator with a frequency range of 1kHz to 300kHz, and a 5V reference with 5% tolerance. It also provides an error amplifier with a common-mode voltage range of -0.3V to VCC-2V, a dead-time control comparator, and a standby current of typically 6mA. These features enable precise regulation and protection in various power conversion topologies. The TL494CDT uses a bipolar process technology, offering a proven and reliable architecture that has been in production for decades. It includes an internal 5V reference that can source up to 10mA for external use, and its output stage can sink or source up to 250mA. The device also features a shutdown control pin that can be used for overcurrent or overvoltage protection, and its dead-time control allows adjustment of the minimum off-time to prevent transformer saturation in push-pull designs. Typical applications include switch-mode power supplies for computers, telecom equipment, industrial systems, and battery chargers. The TL494CDT is also used in DC-DC converters, inverters, and motor control circuits. Its wide supply voltage range and flexible output configuration make it a versatile choice for both single-ended and push-pull topologies. When designing with the TL494CDT, it is important to properly set the oscillator frequency using external timing components (RT and CT) and to ensure adequate decoupling of the VCC pin. The dead-time control pin should be used to prevent shoot-through in push-pull stages, and the error amplifier compensation network must be designed for stable loop operation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the STMicroelectronics datasheet, providing a comprehensive resource for engineers selecting a PWM controller for their power supply design.
TL594INSR - 40V 0.2A 300kHz PWM Controller | Texas Instruments
The Texas Instruments TL594INSR is a 40 V, 0.2 A, 300 kHz pulse-width-modulation (PWM) controller with integrated undervoltage lockout (UVLO), housed in a 16-pin Small-Outline (SOP/NS) package supplied on tape and reel. The device integrates a precision reference, two error amplifiers, an adjustable oscillator, a dead-time control comparator, and uncommitted output transistors capable of sinking or sourcing up to 200 mA each for driving power stages directly. What is a PWM controller? A PWM controller is a power-management integrated circuit that generates switching signals whose duty cycle is modulated to regulate voltage or current in switching power supplies. The TL594 belongs to the voltage-mode PWM controller category, which sits in the hierarchy of PWM controller -> switching controller -> DC-DC controller -> power management IC -> semiconductor. Voltage-mode controllers regulate by comparing an error-amplifier output to a sawtooth waveform, making them robust, well-understood, and tolerant of noisy measurement environments. The TL594INSR supports buck, boost, flyback, forward, full-bridge, half-bridge, and push-pull topologies, giving designers a single IC for multiple converter architectures. Key features include 5 V (±5%) internal reference output, programmable dead-time control (DTC), programmable oscillator frequency up to 300 kHz via external RT and CT, and uncommitted 200 mA open-collector outputs that can be configured in common-emitter or emitter-follower mode for either single-ended or push-pull operation. At the architecture level, the TL594 uses a bandgap-derived 5 V reference feeding two identical error amplifiers with uncommitted inputs and outputs, allowing flexible feedback loop design. The oscillator section generates a sawtooth whose rise time is set by RT-CT and whose maximum frequency is 300 kHz, with internal circuitry that prevents simultaneous conduction of the output stages during transitions (dead-time control). Protection features include UVLO with typical 6 V turn-on threshold and thermal considerations for the SOP-16 (NS) thermal pad. Typical applications include DC-DC converters in industrial power systems, SMPS for telecom and networking equipment, battery chargers using buck or boost topologies, and motor-drive forward converters. Designers favor the TL594 for its topology flexibility and proven architecture in long-lifecycle designs. When designing with this part, ensure RT and CT values are selected to keep oscillator frequency below 300 kHz under all temperature and tolerance conditions, and add adequate bulk capacitance on VCC to prevent UVLO retriggering during start-up.
TLE8366EVXUMA1 - 1.8A 45V Step-Down DC/DC | Infineon
The Infineon TLE8366EVXUMA1 is a 1.8 A PWM step-down DC/DC converter with integrated high-side power switch, packaged in a small PG-DSO-8 (Exposed Pad) with 0.6 V to 16 V adjustable output from a 4.75 V to 45 V input. It belongs to Infineon's automotive-grade OPTIREG power management family and is offered in three variants: fixed 5.0 V (TLE8366EV50), fixed 3.3 V (TLE8366EV33), and adjustable 0.6 V to 16 V output (TLE8366EV, this part). The exposed thermal pad PG-DSO-8 (3.90 mm body width) provides low thermal resistance for sustained 1.8 A operation. A buck converter (also called step-down switching regulator) is a switched-mode power supply topology that uses an inductor, a synchronous or asynchronous switch, and a control loop to convert a higher DC input voltage into a lower, well-regulated DC output voltage with efficiencies typically above 90 %. Within the power management hierarchy, the TLE8366 sits between a high-voltage battery or bus rail and downstream point-of-load regulators, providing an isolated, regulated intermediate rail for analog, microcontroller, or sensor subsystems. Key features of this variant include 4.75 V to 45 V wide input range (suitable for 12 V and 24 V automotive buses with load-dump transients), adjustable output from 0.6 V to 16 V via external resistor divider, integrated 1.8 A power switch, PWM current-mode control, cycle-by-cycle current limiting, over-temperature shutdown, input undervoltage lockout, and an enable pin that drops quiescent current below 2 µA in shutdown. The switching frequency is fixed, allowing predictable EMI filter design. The TLE8366 uses current-mode control with internal slope compensation, providing excellent line and load transient response. The exposed thermal pad allows direct PCB heat-sinking, supporting continuous 1.8 A output across the automotive -40 °C to +150 °C junction temperature range with proper board layout. Typical applications include automotive ECUs, body control modules, instrument clusters, HVAC controllers, sensor power supplies, industrial 24 V bus systems, and any point-of-load regulation downstream of a noisy or wide-ranging input rail. The wide input voltage range also makes it suitable for battery-powered equipment with deeply discharged cells. When designing with this device, choose the inductor, output capacitor, and bootstrap capacitor per the manufacturer datasheet's reference design values. Place the input ceramic capacitor as close as possible to the VIN and PGND pins to minimize switching-node ringing, and use sufficient copper area on the exposed pad for thermal dissipation at maximum load. This page synthesizes Infineon product-page data, distributor pricing, parametric cross-references, and practical design considerations to give engineers a single, citable reference that complements the manufacturer datasheet.
TLE83862ELXUMA1 - 700kHz Boost Controller, 4.75-45V Input | Infineon
The Infineon TLE83862ELXUMA1 (die: TLE8386-2EL) is an automotive-grade, low-side-sense boost controller with built-in protection features, packaged in a 14-pin PG-SSOP-14-EP (exposed pad) outline. It operates from a 4.75 V to 45 V input range, drives an external N-channel MOSFET in a step-up (boost) topology, and supports an adjustable switching frequency from 100 kHz to 700 kHz that can be synchronized to an external clock source. A boost controller is a DC-DC switching controller that regulates an output voltage higher than the input by cycling an external power inductor through a low-side switch. The TLE83862ELXUMA1 belongs to the Infineon TLE8386 family of automotive-grade boost controllers, positioned within the broader power management IC hierarchy as a switching controller -> DC-DC controller -> voltage regulator -> power management IC -> semiconductor. Key features include 700 kHz adjustable switching frequency, 4.75 V to 45 V wide input range, low-side current sensing for simplified ground-referenced feedback, external synchronization capability, integrated protection such as overcurrent, overvoltage, and thermal shutdown, and AEC-Q100 automotive qualification. The exposed thermal pad on the PG-SSOP-14-EP package supports efficient heat removal from the controller IC, which is critical when operating at the upper end of the input range. The TLE83862ELXUMA1 uses a peak-current-mode control architecture with a low-side shunt resistor for current sensing, enabling cycle-by-cycle overcurrent protection and good transient response. The switching frequency is set by a single resistor at the RT pin, providing flexibility to optimize efficiency versus component size. The device integrates a high-side gate driver capable of driving logic-level N-channel MOSFETs in boost configurations for input voltages up to 45 V. Typical applications include automotive LED headlight boost converters, pre-boost supplies for downstream buck regulators in 12 V / 24 V automotive systems, USB-PD / Type-C adapter power stages, industrial 24 V to higher voltage rails, and battery-backed boost converters. The AEC-Q100 qualification makes it especially suited for harsh automotive environments subject to load-dump and cold-crank transients. When designing with this part, ensure the input capacitor is sized to handle the pulsating current of the boost topology, and route the low-side current-sense traces as a Kelvin connection to the shunt resistor to preserve current-mode control accuracy. The exposed pad must be soldered to a sufficiently large copper pour to keep junction temperature within the -40 C to +125 C operating range during load-dump events. This page synthesizes distributor pricing, drop-in alternatives from the Infineon TLE8386 family, application circuits, and practical PCB layout notes that go beyond the manufacturer datasheet.
TLF51801ELVXUMA1 - 10A Synchronous Buck Controller, 45V, AEC-Q100 | Infineon
The Infineon TLF51801ELVXUMA1 is a 10 A synchronous PWM step-down DC/DC controller with external n/n-MOSFET drivers, packaged in a 14-pin PG-SSOP with exposed thermal pad. It operates from 4.75 V to 45 V input, supports a 99% maximum duty cycle, and is rated for -40 C to +150 C junction temperature with AEC-Q100 automotive qualification. A PWM step-down (buck) controller is a type of switching voltage regulator that uses external MOSFETs as the power switches, a controller IC to drive those switches, and an LC output filter to deliver a lower regulated output voltage. Within the broader power-management hierarchy, the buck controller sits above integrated buck converters (which embed the switches) and below point-of-load regulators; it is chosen when load current exceeds integrated-converter capability, here up to 10 A, while still requiring controller-grade flexibility for switching frequency, current sense, and protection thresholds. Key features include a 700 kHz nominal switching frequency, adjustable current limit via R_DS(on) sensing on the high-side switch, integrated bootstrap gate drive for the high-side n-MOSFET, and a 99% duty cycle that enables low-dropout operation near the input rail. The controller uses voltage-mode control with an external compensation network and includes an enable input, power-good output, and soft-start capability. The architecture is built on a bipolar / BiCMOS process with a precision internal reference, allowing tight load and line regulation across the automotive temperature range. Synchronous rectification eliminates the need for an external Schottky diode at high-side, raising efficiency at high load currents and reducing thermal stress in compact modules. Typical applications include automotive body and chassis ECUs, LED driver front-ends, industrial 24 V sensor and actuator rails, and any point-of-load conversion above 3 A that demands automotive-grade reliability and wide input-voltage tolerance. A 45 V abs-max input allows operation directly from 12 V and 24 V automotive buses with substantial transient margin. When designing with this controller, select external MOSFETs with adequate safe-operating-area margin at worst-case VIN = 45 V and programmed peak current; the PG-SSOP-14 EP package dissipates gate-drive losses but the high-side / low-side FETs carry switching loss, so thermal design of the FETs is the dominant concern, not the IC itself. This page synthesizes distributor pricing, AEC-Q100 qualification status, drop-in same-package alternatives, and practical design notes that complement, rather than duplicate, the manufacturer datasheet.
TLS4125D0EPV50XUMA1 - 2.5A 5V AEC-Q100 Buck Converter | Infineon
The Infineon TLS4125D0EPV50XUMA1 is an OPTIREG Switcher synchronous step-down (buck) DC/DC converter delivering a fixed 5V output at up to 2.5A from a wide 3.7V to 40V automotive input bus, housed in a 14-pin TSDSO (PowerTSSOP, 3.90mm width) exposed-pad package. Key specifications include a 2.8 MHz nominal switching frequency, ±1.5% PWM-mode feedback accuracy, 34 µA quiescent current, integrated power MOSFETs, and configurable 320 kHz to 560 kHz or 1.6 MHz to 2.8 MHz operating ranges. The IC supports PFM light-load mode for high efficiency at low current, synchronization input, spread spectrum modulation, and an integrated reset function with adjustable undervoltage/overvoltage thresholds. A buck converter is a switched-mode DC/DC topology that steps a higher DC input voltage down to a lower regulated DC output by alternately storing energy in an inductor and releasing it to a load through synchronous MOSFETs. The TLS4125D0EPV50XUMA1 belongs to the broader hierarchy of switching regulators -> DC/DC converters -> power management ICs -> semiconductors, and within Infineon's portfolio it sits in the OPTIREG automotive-grade family targeted at ECU point-of-load rails. Architecturally, the device integrates high-side and low-side MOSFETs, internal compensation, a soft-start circuit, and a precision feedback loop that holds 5V ±2% across line, load, and temperature variations. Spread spectrum and synchronization help meet CISPR 25 / automotive EMI limits without bulky filtering, while the dedicated reset comparator with programmable delay provides a clean microcontroller power-good signal. Typical applications include automotive body and chassis ECUs, ADAS sensor rails, infotainment head-unit supplies, instrument clusters, lighting modules, and industrial 24V-bus point-of-load regulation. The 40V absolute maximum rating tolerates load-dump transients common in 12V/24V vehicle systems, and the AEC-Q100 qualification supports deployment in safety-relevant automotive environments. When designing in this part, follow the datasheet's recommended inductor (typically 4.7 µH) and ceramic output capacitor (typically 22 µF X7R) values, keep the SW node copper area minimal to limit EMI, and connect the exposed pad to a thermal copper pour. Enable the spread-spectrum pin in noise-sensitive ADAS or audio rails to relax input-filter design.
TLV61048DBVR - 14V Non-Sync Boost Converter | Texas Instruments
The Texas Instruments TLV61048DBVR is a non-synchronous boost converter housed in a 6-pin SOT-23-6 (DBV) package that delivers up to 14 V output voltage from a low-voltage input source such as a single-cell Li-ion battery or super capacitor. The device integrates a 3.7 A typical current-limit power switch and operates over a 2.65 V to 5.5 V input range with an adjustable output from 3.3 V to 14 V. A boost converter (also called a step-up DC-DC converter) is a switching regulator topology that produces an output voltage higher than its input voltage. Boost converters belong to the broader category of DC-DC switching regulators inside the power management IC family. The TLV61048 implements a non-synchronous topology, meaning it uses an internal MOSFET as the high-side switch and requires an external Schottky rectifier for the low-side path - this trades a small efficiency loss for a lower BOM cost versus synchronous alternatives. Key features of the TLV61048DBVR include a 600 kHz (typical) switching frequency, 3.7 A switch current limit, internal soft-start, thermal shutdown, and a power-good indicator. The fixed-frequency peak current-mode control provides fast transient response and simplifies loop compensation. According to the TI product page, the device can be configured for 600 kHz operation to balance efficiency and external component size. The SOT-23-6 package measures 2.9 mm x 1.6 mm, enabling ultra-compact PCB layouts suitable for portable and space-constrained designs. The internal MOSFET RDS(on) and Schottky selection govern conduction loss, while the 600 kHz switching frequency minimizes the inductor footprint. A reference design (TIDA-050033) demonstrates how the TLV61048 extends the usable discharge range of super capacitors in smart-meter PLC modules. Typical applications include single-cell Li-ion battery boost rails for sensors and IoT nodes, super-capacitor backup supplies for smart meters, PMIC bias rails in portable industrial handhelds, and 5 V to 12 V bias generation for analog front-ends. The wide output range supports biasing op-amps, audio codecs, and LCD bias generators. When designing with the TLV61048, select the external Schottky diode with low reverse leakage and adequate current rating (>= 1 A). Place the input capacitor (>= 4.7 uF X5R ceramic) and output capacitor (>= 4.7 uF X5R ceramic) close to the IC pins. Ensure the inductor saturation current exceeds the 3.7 A switch limit by at least 20% to avoid saturation at high load. This page synthesizes distributor stock and pricing, SOT-23-6 drop-in alternatives, and practical design notes not found on the manufacturer product page.
TNY277GN - 18.5W Offline Flyback Switcher | Power Integrations
The Power Integrations TNY277GN is an energy-efficient, off-line switcher IC from the TinySwitch-III family, designed for flyback power supplies. It integrates a 700 V power MOSFET, oscillator, high-voltage switched current source, user-selectable current limit, and thermal shutdown circuitry in a compact SMD-8C package. The device operates at a fixed switching frequency of 132 kHz and delivers up to 18.5 W output power from a universal input range of 85 VAC to 265 VAC, or 23.5 W from 230 VAC. Its simple ON/OFF control scheme eliminates the need for loop compensation, reducing external component count and system cost. An off-line switcher is a power management IC that converts AC mains voltage directly to a regulated DC output, typically using a flyback or buck topology. It integrates the power switch (MOSFET) and control circuitry into a single package, simplifying the design of AC-DC power supplies. The TinySwitch-III family is a specific series of off-line switchers from Power Integrations, known for their high efficiency, low standby power, and ease of use. These ICs are widely used in chargers, adapters, and auxiliary power supplies. Key features of the TNY277GN include a 700 V MOSFET for wide input voltage handling, a user-selectable current limit for design flexibility, and built-in thermal shutdown for protection. The device also features frequency jittering to reduce EMI, making it easier to meet electromagnetic compatibility standards. Its ON/OFF control scheme provides excellent load regulation without the need for an optocoupler in many designs, simplifying the feedback loop. Technically, the TNY277GN uses a current-mode control architecture with a high-voltage switched current source for startup, eliminating the need for a separate startup resistor. The device's EcoSmart technology ensures low standby power consumption, making it suitable for energy-efficient applications. The SMD-8C package is designed for surface-mount assembly, offering a compact footprint for space-constrained designs. Typical applications include AC-DC adapters, battery chargers, standby power supplies for TVs and monitors, and auxiliary power supplies for appliances. The TNY277GN is particularly well-suited for applications requiring high efficiency and low standby power, such as Energy Star compliant products. When designing with the TNY277GN, ensure proper transformer design and adequate PCB layout to minimize leakage inductance and EMI. The device's thermal shutdown feature protects against overtemperature conditions, but proper heat sinking through the PCB copper area is recommended for reliable operation at full load.
TNY277GN-TL - 18.5W Offline Flyback Switcher | Power Integrations
The Power Integrations TNY277GN-TL is an offline flyback switcher IC from the TinySwitch-III family, integrating a 700 V power MOSFET, oscillator, high-voltage switched current source, current limit (user selectable), and thermal shutdown circuitry in a compact SMD-8C (7-lead) package. It delivers up to 18.5 W output power from a universal input range of 85-265 VAC, and 23.5 W at 230 VAC, making it ideal for low-power AC-DC power supplies. TinySwitch-III is a family of energy-efficient, low-power offline switchers that use a simple ON/OFF control scheme, eliminating the need for loop compensation. This simplifies design and reduces component count, lowering system cost. The IC operates at a fixed frequency of 132 kHz with frequency jittering to reduce EMI, and includes a user-selectable current limit to optimize efficiency and power delivery. Key features include a 700 V power MOSFET, integrated oscillator, high-voltage switched current source for fast startup, current limit selection, and comprehensive protection features such as over-temperature protection, overvoltage protection, and line undervoltage detection. The EN/UV pin senses line undervoltage through an external resistor, and if absent, disables the line undervoltage function. The device also features leading edge blanking to prevent false triggering. The TNY277GN-TL is designed for high efficiency and low standby power, meeting energy efficiency standards. Its integrated 700 V MOSFET allows direct connection to the rectified AC line, simplifying the primary-side circuit. The SMD-8C package with gull-wing leads is suitable for automated assembly and provides good thermal performance. Typical applications include auxiliary power supplies for appliances, standby power for TVs and monitors, AC-DC adapters, and industrial control power supplies. The wide input voltage range and robust protection make it suitable for global applications. When designing with this device, ensure proper PCB layout with adequate creepage distances for high-voltage isolation, and follow the recommended transformer design in the datasheet to achieve optimal performance and EMI compliance.
TNY277PG - 23.5W Offline Switcher IC | Power Integrations
The Power Integrations TNY277PG is an energy-efficient, off-line switcher IC from the TinySwitch-III family, designed for flyback power supplies up to 23.5 W at 230 VAC or 18 W at 85-265 VAC. It integrates a 700 V power MOSFET, oscillator, high-voltage switched current source, user-selectable current limit, and thermal shutdown circuitry in an 8-pin PDIP-C package (7 leads). The device uses a simple ON/OFF control scheme that eliminates the need for loop compensation, reducing external component count and system cost. An off-line switcher is a power management IC that converts AC mains voltage directly to a regulated DC output, typically using a flyback or buck topology. It combines a high-voltage power switch, control logic, and protection features in a single package, simplifying the design of AC-DC power supplies. The TinySwitch-III family is part of the broader class of switched-mode power supply (SMPS) controllers, which are essential in applications ranging from chargers to industrial power supplies. Key features of the TNY277PG include a 700 V MOSFET for wide input voltage range, a 132 kHz switching frequency for compact magnetics, and selectable current limit for design flexibility. The ON/OFF control scheme provides excellent efficiency across load conditions, and the device includes auto-restart protection for output short-circuit and open-loop faults. The 8-PDIP-C package (7 leads) is through-hole mounted, making it easy to prototype and manufacture. Technically, the TNY277PG integrates the high-voltage power switch and control circuitry on a single die, reducing parasitic inductance and improving reliability. The high-voltage switched current source enables fast startup and low standby power, meeting energy-efficiency standards. The device also features a frequency jittering function to reduce EMI, simplifying filter design. Typical applications include AC-DC adapters, chargers, standby power supplies, and auxiliary power supplies for appliances and industrial equipment. The wide input range and high efficiency make it suitable for global markets. When designing with the TNY277PG, ensure proper heat sinking for the PDIP package at high output power, and follow the recommended PCB layout for the primary-side circuitry to minimize EMI and ensure stable operation.
TNY277PN - 18.5W Flyback Switcher IC | Power Integrations
The Power Integrations TNY277PN is an energy-efficient offline switcher IC from the TinySwitch-III family. It integrates a 700 V power MOSFET, a 132 kHz oscillator, a high-voltage switched current source, user-selectable current limit, and thermal shutdown circuitry into a through-hole 8-PDIP-C package. Under an 85-265 VAC universal input range, the device delivers up to 18.5 W output; at a fixed 230 VAC input it supports up to 23.5 W. These ratings make it suitable for open-frame adapter and auxiliary supply designs that require a simple two-terminal flyback converter stage. An offline switcher is a power-management integrated circuit that accepts rectified AC line voltage and performs high-frequency switching to provide one or more isolated DC outputs through a flyback transformer. The TinySwitch-III family is a subcategory of AC-DC converters, which sit above linear regulators and standard DC-DC converters in the power conversion hierarchy. By integrating the power MOSFET and controller on one chip, offline switcher ICs reduce BOM count, simplify PCB layout, and improve reliability compared to discrete controller-plus-MOSFET implementations. Key features of the TNY277PN include the built-in 700 V power MOSFET, which provides wide margin for line-voltage spikes and improves surge robustness. The integrated high-voltage switched current source accelerates startup and reduces no-load input power. The user-selectable current limit lets designers optimize transformer size for the target power level, while the 132 kHz switching frequency balances transformer size against switching losses. Thermal shutdown protects the IC against secondary-side overload or fault conditions. In operation, the IC uses a simple ON/OFF control scheme that requires no external loop compensation. The internal oscillator controls the power MOSFET duty cycle; when output feedback demands energy, the MOSFET switches, then enters a low-power state. This burst-mode operation at light load reduces standby losses and is especially useful for Energy Star-compliant adapters. The through-hole 8-pin DIP package simplifies assembly and helps transfer heat to PCB copper in moderate-power designs. Typical applications include AC/DC adapters and battery chargers, standby and auxiliary power supplies for appliances, LED drivers, industrial control supplies, and IoT smart-home power modules. The flyback topology pairs with inexpensive transformers and standard optocoupler/TL431 feedback networks. When designing with TNY277PN, pay attention to drain snubber selection, transformer leakage inductance, and BP/M pin decoupling. A well-laid-out PCB with tight loop areas is critical for meeting conducted EMI limits.
TOP243YN - 30W AC/DC Off-line Switcher, TO-220-7C | Power Integrations
The Power Integrations TOP243YN is an integrated off-line switcher IC from the TOPSwitch-GX family, combining a 700V power MOSFET, PWM controller, fault protection, and other control circuitry onto a single CMOS die, housed in a 7-pin TO-220-7C through-hole package. It supports a wide input range from 85 VAC to 265 VAC and delivers up to 30W output at universal-input mains (45W at 230 VAC single-rail), making it one of the higher-power members of the TOPSwitch-GX Y-package lineup. An off-line switcher, also called an AC-DC converter or isolated flyback controller, takes the rectified mains voltage directly on its drain and produces an isolated, regulated DC output without requiring a separate low-voltage supply rail for primary-side control. The TOP243YN belongs to the broader family of power management ICs (PMICs) and specifically the flyback / SMPS (switched-mode power supply) controller category. It is positioned above linear regulators (which cannot step down from rectified mains efficiently) and below PFC+LLC combo controllers in capability, occupying the mainstream isolated-output power-supply segment. Key features of the TOP243YN include 66 kHz to 132 kHz PWM switching frequency with frequency jittering for EMI reduction, integrated soft-start, cycle-by-cycle current limiting, over-temperature shutdown, over-voltage protection, and EcoSmart low standby power (<1W at 265 VAC). The drain voltage rating is 700V, the on-resistance is approximately 2.2 ohm, and the peak current limit is 3.0A. Frequency and current-limit characteristics are selected by device letter code (TOP243 -> 'P' frequency, 'G' current limit) so the same Y-package pinout applies across the family. The internal architecture pairs a high-voltage start-up bias circuit with an analog PWM engine, eliminating auxiliary winding bias requirements in many designs and reducing BOM count by 12-20 components compared with discrete UC3842-style implementations. EcoSmart technology lets the controller drop below 1W no-load consumption, satisfying CEC and ENERGY STAR standby requirements for adapter and appliance applications. Typical applications include low-power AC-DC adapters (laptop bricks, set-top boxes, printers), standby supplies in white goods and industrial controls, appliance power modules, and auxiliary supplies for larger PFC systems. The TO-220-7C package with a metal tab allows direct PCB heatsinking without an insulator pad when correctly grounded. When designing with this device, ensure adequate creepage distance between the drain tab and any secondary-side traces to meet IEC 60950 / IEC 62368 reinforced-isolation rules, and select input bulk capacitance per the datasheet's universal-input vs single-230V table. Always check the TOP24x letter code page in the datasheet to confirm frequency and current-limit variant match your application.
TOP247YN - 165W TOPSwitch-GX Off-Line Switcher | Power Integrations
The Power Integrations TOP247YN is an EcoSmart integrated off-line switcher from the TOPSwitch-GX family, integrating a 700V power MOSFET, PWM controller, fault protection, and control circuitry onto a single CMOS die in a 6-pin TO-220 package (TO-220-7C by DigiKey pin count). It delivers up to 165 W output power at 230 VAC and 128 W at universal 85-265 VAC input in flyback converter topology. Background Knowledge: An off-line switcher is an AC-DC converter IC that takes rectified mains voltage (after a bridge rectifier and bulk capacitor) and chops it at high frequency to drive an isolating transformer, producing a regulated low-voltage DC output. Off-line switchers (also called AC-DC converters or offline flyback controllers) sit in the power management IC hierarchy: off-line switcher -> AC-DC converter -> power management IC -> semiconductor. The TOPSwitch-GX family represents an early highly-integrated approach, eliminating the need for a separate MOSFET, PWM controller, and current-sense circuit. Key features include 132 kHz / 66 kHz selectable switching frequency with frequency jitter for EMI compliance (CISPR 22 / FCC Class B / EN55022B), hysteretic thermal shutdown, remote ON/OFF control, line feed-forward with DC MAX reduction, separate LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) pins on the Y package, and half-frequency option in the Y package. Cycle-by-cycle current limit and auto-restart fault handling protect against transformer saturation and output short circuits. Typical applications include LCD monitors, personal computers, small servers, laptop adapters, set-top boxes, digital TVs, printers, and DVD players. The wide input range (85-265 VAC) makes it suitable for global products requiring universal mains input without regional variants. Design consideration: At universal input 85-265 VAC and full 128 W load, ensure the transformer primary inductance meets the TOPSwitch-GX design guide minimum (typically 350-500 uH for TOP247) to avoid peak current-limit triggering. Frequency-jitter EMI performance depends on adequate Y-capacitor and common-mode choke selection on the input filter. This page synthesizes distributor pricing, drop-in alternatives, and design notes not found on any single manufacturer datasheet, optimized for engineers selecting or replacing TOPSwitch-GX devices.
TPS22996H-Q1 - 5.5V 4A Dual Load Switch | TI Automotive
The Texas Instruments TPS22996H-Q1 is a dual-channel load switch with controlled turn-on, containing two N-channel MOSFETs rated for 0.6 V to 5.5 V input voltage, 13 mOhm typical on-resistance, and 4 A maximum continuous current per channel, housed in a 2.1 mm x 1.2 mm 8-pin DYC (SOT-583) package. A load switch is a power management IC that sits between a supply rail and its load, using an internal MOSFET to connect or disconnect power under the control of a logic signal. Within the power-management hierarchy (load switch -> power distribution switch -> power management IC -> semiconductor), load switches add controlled slew rates, fault protection, and rail sequencing that a bare MOSFET cannot provide, making them essential building blocks in multi-rail electronic systems. Key features include the 13 mOhm typical RON, which minimizes voltage drop and conduction loss at the full 4 A per channel load, independently controlled ON1 and ON2 GPIO-compatible inputs that let a microcontroller sequence each rail separately, and controlled turn-on that limits inrush current when charging large downstream capacitance. The device is AEC-Q100 qualified for automotive use and characterized over -40 C to +125 C. Technically, the TPS22996H-Q1 integrates the power MOSFET, driver, and control logic in one die, reducing BOM count versus discrete solutions. Per TI documentation, the pins are humidity-robust and able to function with a 100 kOhm short from any pin to GND or power, improving reliability in harsh automotive environments. Typical applications include automotive infotainment and cluster power distribution, ADAS module periphery-rail switching, telecom line-card power sequencing, and industrial PLC I/O rail control, where low RON and dual independent channels save board space. Design consideration: at 4 A per channel, PCB copper area under the small DYC package determines thermal rise; verify junction temperature with your actual duty cycle and both-channel loading. This page synthesizes distributor pricing context, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
TPS2372-4RGWR - 90W 802.3bt PoE PD Controller | TI
The Texas Instruments TPS2372-4RGWR is an IEEE 802.3bt (Type 1-4) Power over Ethernet (PoE) powered device (PD) interface controller that supports power levels up to 90 W at the PSE and 71.3 W at the PD input over a 100-meter CAT5 cable, housed in a 20-pin VQFN (5x5 mm) package. The -4 grade variant implements a 335-mA inrush current compatible with all PSE types. A PoE PD interface controller is the analog front-end IC that sits between the Ethernet cable's powered pairs and a device's isolated DC-DC converter. It performs detection, classification, inrush control and hot-swap switching under IEEE 802.3af/at/bt standards, forming part of the power management IC hierarchy used in networked devices such as access points, IP cameras and LED lighting. Key features include support for both IEEE 802.3at (PoE+) and IEEE 802.3bt (draft) Type 1-4 powered devices, automatic MPS (Maintain Power Signature) and Autoclass, and low internal switch resistance that permits high-power designs up to 90 W. Automatic MPS allows the PD to remove the power converter from the MPS duty cycle for energy savings, while Autoclass enables the PSE to discover actual power consumption. The TPS2372-4 uses the low inrush rating (335 mA) shared across its family, ensuring compatibility with all PSE types while a high-power PD must limit its converter startup peak current per the TI datasheet. The integrated low-resistance pass device reduces conduction losses versus discrete hot-swap MOSFET solutions. Typical applications include 802.3bt Type 3/4 LED lighting drivers, 5G small-cell radios and wireless access points, security IP cameras, network switches, and industrial IoT gateways that draw power directly from the Ethernet cable. Design consideration: pair the TPS2372-4 with a converter whose startup peak current respects the inrush envelope, and follow the TI EVM (TPS2372-3EVM-757) reference layout for the detection/classification front-end. This page synthesizes distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the manufacturer datasheet.
TPS23751PWPR - 802.3at PoE+ PD Interface & Flyback Controller | TI
The Texas Instruments TPS23751PWPR is an IEEE 802.3at (PoE+) powered-device (PD) interface controller combined with a current-mode flyback DC-DC PWM controller, delivered in a 16-pin HTSSOP (PWP) package with exposed PowerPAD, rated up to 25.5 W from a 0 V to 57 V PoE input range. A Power-over-Ethernet powered-device interface is the front-end circuit that negotiates and validates power delivery over Ethernet cabling per the IEEE 802.3af/at standards, handling detection, classification, and inrush current limiting before an isolated or non-isolated DC-DC converter converts the 37 V to 57 V PoE rail to system voltages. In the power-management hierarchy it sits between the Ethernet magnetics/diode bridges and the system power tree. Key features include hardware type-2 classification per IEEE 802.3at, an auxiliary power detect (APD) input that enables seamless switchover between PoE and wall-adapter power, and a current-mode PWM controller optimized for high efficiency across wide load ranges, supporting both flyback and synchronous flyback topologies. The integrated thermal protection and precision 25.5 W class-4 signature support full PoE+ designs such as wireless access points and IP security cameras. Technically, the PoE section implements detection, classification, and a controlled inrush path with a pass device, while the controller section uses peak current-mode control with programmable oscillator frequency, enabling optimized transformer designs and high light-load efficiency - important for energy-efficient (Energy-Efficient Ethernet adjacent) designs. Typical applications include 802.3at PoE+ wireless access points, IP phones, IP surveillance cameras, and networked industrial equipment that must draw power from the Ethernet cable or fall back to auxiliary adapter power. Design consideration: keep the detection and classification resistor networks within IEEE tolerance, and use the PowerPAD soldered to a copper pour for thermal dissipation at full PoE+ load. This page synthesizes distributor data, the TPS23750 comparison, and practical PoE design notes not found in the datasheet. Pricing shown is as of 2026-10-19.
TPS23753A - IEEE 802.3at PoE PD Interface + DC-DC Controller | TI
The Texas Instruments TPS23753A is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode DC-DC controller optimized specifically for isolated converter designs, supporting the IEEE 802.3at standard as a 13-W, type 1 PD in a 14-pin TSSOP (PW) package. A PoE powered-device interface is the front-end circuit that safely extracts power from an Ethernet cable. It performs detection, classification, inrush limiting, and load switching per the IEEE 802.3af/802.3at standards, then hands regulated power to an isolated (or non-isolated) DC-DC converter stage. Within the power-management hierarchy, the TPS23753A belongs to the PoE controller family that integrates both the PD interface and the PWM controller in a single semiconductor device, reducing external component count versus discrete two-chip solutions. Key features include a complete IEEE 802.3at-compliant PoE interface with enhanced ESD ride-through capability, an integrated robust 100-V, 0.7-ohm hotswap MOSFET that eliminates a discrete external FET, programmable switching frequency with synchronization support for noise-sensitive designs, and adapter ORing support with 12-V adapter operation for auxiliary-power architectures. On the technical side, the device uses a current-mode control architecture optimized for isolated flyback and forward converter topologies, which simplifies transformer-based designs commonly used in PoE PD applications. The hotswap MOSFET integration reduces BOM cost and board area, while the ESD enhancements improve field robustness on long Ethernet cable runs where surge and ESD events are common. Type 1 compliance means the device advertises and manages up to 13 W at the PD input, a superset of the original IEEE 802.3af requirements. Typical applications include IP security cameras, IP telephones, wireless access points, and networked industrial sensors, where the TPS23753A converts PoE line power into one or more isolated low-voltage rails for the system electronics. Design consideration: because the integrated 100-V hotswap MOSFET handles the full PD input current, verify inrush and thermal margins at your maximum load; the 13-W type 1 budget must cover converter efficiency losses, so plan the transformer and output design around roughly 10-12 W of usable output power. This page synthesizes distributor availability data, the TI/TI-E2E-verified distinction between TPS23753 and TPS23753A, drop-in alternative analysis, and practical design guidance not found in the manufacturer datasheet. Pricing shown is as of 2026-10-19.
TPS23755RJJR - IEEE 802.3at PoE PD with Flyback Controller | TI
The Texas Instruments TPS23755RJJR is an IEEE 802.3at Power over Ethernet (PoE) powered device (PD) interface and current-mode no-opto flyback DC-DC controller that integrates a 150-V switching power FET, housed in a 24-pin VSON (6x4 mm) package. A PoE powered device interface is the front-end circuit that negotiates and extracts power from a Power Sourcing Equipment (PSE) port such as a PoE switch or injector, according to the IEEE 802.3at standard. Within the power-management hierarchy, it sits between the Ethernet cabling and the isolated flyback converter that generates the system's low-voltage rails, combining classification, inrush control, hot-swap protection, and switching regulation in one IC. Key features include full 802.3at Type 1 (13 W) PD compliance, an integrated 150-V power MOSFET that eliminates the external pass switch, and current-mode flyback control with primary-side regulation (PSR). PSR removes the optocoupler and secondary-side reference, cutting component count and board area while improving reliability in isolated designs. Technically, the device employs spread spectrum frequency dithering (SSFD) to reduce conducted EMI peaks, easing filter design toward CISPR compliance. Advanced startup circuitry supports operation from the PoE detection and classification voltage range before full power is available, and the current-mode architecture provides inherent cycle-by-cycle current limiting and simple loop compensation for the flyback power stage. Typical applications include IP security cameras, wireless access points, VoIP phones, and networked LED lighting luminaires - all space-constrained PoE endpoints where a single-chip PD interface plus converter saves measurable board area. The high integration level makes it especially attractive for compact, cost-sensitive camera modules. Design consideration: because the power FET is integrated, PCB copper area under the VSON exposed pad is the main thermal path; size the transformer and demagnetization timing so PSR sampling windows are honored, and verify EMI with SSFD enabled before final layout freeze. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS23755RJJT - 802.3at PoE PD + Flyback Controller | TI
The Texas Instruments TPS23755RJJT is an IEEE 802.3at Power over Ethernet (PoE) powered-device (PD) interface controller with an integrated 150-V switching power FET and a current-mode no-opto flyback DC-DC controller, supplied in a 24-pin VSON CLCC (6x4 mm) package with exposed pad and delivering up to 13 W of isolated output power from a 57 V PoE input. A PoE powered-device interface controller is a power management IC that performs the detection, classification, inrush current limiting, and undervoltage-lockout functions demanded by the IEEE 802.3at standard, then hands off the validated power to an isolated or non-isolated DC-DC converter stage. It sits between the RJ45 Ethernet port and the converter, forming the entry point of the PD power architecture. Key features include full IEEE 802.3at Type 2 compliance with two-event classification, an internal 150 V power MOSFET that eliminates a discrete switching FET, primary-side regulation (PSR) that removes the optocoupler and secondary feedback circuitry, and spread spectrum frequency dithering (SSFD) for reduced EMI. Advanced startup supports bias from the auxiliary (adapter) power path. The current-mode flyback controller integrates the control loop, oscillator, and drivers, enabling compact, low-component-count designs. PSR senses output voltage from the primary-side auxiliary winding, simplifying the transformer and secondary circuit while supporting regulated isolated outputs typical of 5 V and 12 V PD loads. Typical applications include IP security cameras, wireless access points, VoIP phones, and network-connected LED lighting drivers powered directly from the Ethernet cable. Design consideration: provide adequate copper area under the VSON exposed pad for thermal dissipation and follow the datasheet PCB layout guidelines for the switching loop to limit EMI. This page synthesizes distributor sourcing data, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.