Batteriemanagement
Produkte (195)
BQ25883RGER - 2A 2-Cell Boost Battery Charger | TI VQFN-24
The Texas Instruments BQ25883RGER is a highly integrated 2-A switch-mode boost battery charger designed for 2-cell (2S) lithium-ion and lithium-polymer batteries, housed in a 24-pin VQFN (RGE) 4x4 mm package. It supports a 3.9V to 6.2V input range from a USB or 5-V adapter source, delivers up to 2 A of charge current, and provides I2C-programmable charge voltage, charge current, and input-current-limit settings. The device integrates power-path management so the system can run from the input source, the battery, or both simultaneously. A battery charger is a power-management IC that safely transfers energy from an external DC source (such as a USB port or wall adapter) into a rechargeable battery pack while protecting the cells from over-voltage, over-current, and overheating. Within the broader taxonomy, the BQ25883 sits under battery charger -> battery management -> power management IC -> semiconductor. The "boost" topology means the charger boosts a 5-V input up to the higher 8.0V-8.4V voltage required by a 2-cell Li-ion pack, and it can also function as a boost converter for USB On-The-Go (OTG) mode, supplying 5 V at the input pin from the battery. Key features include USB OTG boost operation up to 2 A, dynamic power-path management (DPPM), input current optimizer (ICO), and an integrated 12-bit ADC for monitoring bus voltage, battery voltage, charge current, and die temperature. The BQ25883 also supports adjustable thermal-regulation thresholds and JEITA-style battery-temperature sensing via an NTC pin, making it suitable for safety-conscious portable products. Architecturally, the device combines a synchronous boost switching converter (operating at up to 1.5 MHz), a high-accuracy I2C-programmable battery-regulation loop, and a low-resistance power path. A single inductor and small ceramic capacitors complete the power stage, allowing compact PCB designs for handheld and wearable applications. Typical applications include 2S Li-ion power banks, 2S portable medical monitors, USB-C tablets, 2S handheld vacuum cleaners, and Bluetooth speakers. The OTG boost capability also lets the device act as a 5-V supply for downstream accessories. When designing with the BQ25883, ensure the input capacitor, output capacitor, and inductor are placed close to the IC and that the thermal pad is soldered to a sufficient copper pour for 2-A continuous charging. Use the I2C interface to set charge voltage, current, and input-current limits per the host processor's power-budget policy. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
BQ27421-G1 - System-Side Impedance Track Fuel Gauge | TI
The Texas Instruments BQ27421-G1 is a system-side Impedance Track fuel gauge with integrated 7 mΩ current-sense resistor for single-cell Li-Ion battery packs, housed in a 9-ball DSBGA (YZF) package. It reports remaining capacity (mAh), state-of-charge (%), battery voltage, current, temperature, and runtime via an I2C interface, requiring minimal host microcontroller firmware development. Key specifications include a 4.2 V maximum charge voltage (chemistry profile A), integrated 7 mΩ sense resistor between the BAT and SRX pins, I2C communication up to 400 kHz, and ultra-low quiescent current suitable for always-on battery monitoring. The device operates directly from the cell it monitors, eliminating the need for an external regulator rail. Its Impedance Track algorithm models cell impedance to deliver accurate state-of-charge estimation across varying load, temperature, and aging conditions without requiring board-level calibration. The BQ27421-G1 belongs to the fuel gauge / battery monitor IC category within the power management IC hierarchy. As a system-side gauge (mounted on the host board rather than inside the battery pack), it is designed for applications where the battery pack is not a smart pack but accurate fuel gauging is still required. Its integrated sense resistor eliminates the precision external shunt that traditional coulomb-counting solutions require, reducing BOM cost and PCB area while improving current-sensing accuracy at low loads. Typical applications include smartphones, wearables, portable medical devices, Bluetooth headsets, and single-cell Li-Ion powered IoT endpoints where reporting remaining runtime to the user matters. The wide chemistry support — pre-programmed profiles such as 4.2 V, 4.3 V, and 4.35 V, indicated by the suffix letter (A, B, etc.) — lets designers match the gauge to the cell's full-charge voltage without firmware rework. When designing with this part, route the BAT and SRX traces as a Kelvin connection directly to the integrated sense-resistor balls to avoid parasitic IR drop, and keep the DSBGA balls clear of flux contamination during reflow. Always select the chemistry variant (e.g. BQ27421YZFR-G1A for 4.2 V, -G1B for 4.3 V, -G1C for 4.35 V) that matches the cell's maximum charge voltage to avoid over-reporting SOC. This page consolidates verified distributor pricing, drop-in chemistry-variant alternatives in the same DSBGA footprint, and practical PCB-layout notes that go beyond what the manufacturer datasheet alone covers.
BQ27421YZFR-G1A - System-Side Fuel Gauge w/ Integrated Sense Resistor | Texas Instruments
The Texas Instruments BQ27421YZFR-G1A is a system-side Impedance Track fuel gauge IC with an integrated current-sense resistor, designed for single-cell Lithium-Ion and Lithium-Polymer battery packs. Housed in a 9-ball DSBGA (YZF) package, it operates from 2.45V to 4.5V supply, supports I2C communication, and provides accurate state-of-charge, remaining capacity, and runtime reporting with minimal host-side firmware. A battery fuel gauge is a category of battery management IC that estimates the state-of-charge (SOC) of a rechargeable battery by combining voltage, current, and impedance measurements. As a sub-category of battery monitors and gas gauges, it sits within the broader battery management hierarchy of power management ICs, ultimately belonging to the semiconductor product tree used in portable and embedded systems. The BQ27421YZFR-G1A features TI's patented Impedance Track algorithm, which adapts to cell aging and provides accurate SOC reporting without requiring a full charge-discharge characterization cycle. The integrated sense resistor eliminates the need for an external shunt, simplifying PCB layout and reducing BOM cost. The device reports remaining capacity (mAh), state-of-charge (%), voltage, current, and temperature over the standard I2C interface, supporting SMBus-compatible commands. Typical applications include wearables, fitness bands, portable medical devices, Bluetooth headphones, smart pens, single-cell Li-Ion powered IoT endpoints, and compact handheld instrumentation where board space is constrained and a separate shunt resistor is undesirable. When designing with the BQ27421YZFR-G1A, ensure the I2C lines have appropriate pull-up resistors (typically 10kohm to VCC) and follow the layout guidelines for the DSBGA thermal pad to maximize thermal dissipation and mechanical reliability. A 0.1uF decoupling capacitor close to the BAT pin is required, and the device should be the only battery monitor on the I2C bus at address 0x55 unless address reprogramming is performed. This page consolidates the BQ27421YZFR-G1A's datasheet parameters, drop-in alternatives, and practical design guidance not typically aggregated on a single distributor page, enabling engineers to quickly assess fit for their next single-cell Li-Ion design.
BQ29707DSER - Li-Ion/Li-Po Single-Cell Battery Protector | TI
The Texas Instruments BQ29707DSER is a cost-effective voltage and current protection IC for single-cell Li-Ion and Li-Polymer batteries, integrating the full secondary protection chain into a compact 6-pin WSON (DSE) package measuring 1.5 mm x 1.5 mm with 0.5 mm terminal pitch. It delivers fixed overcharge, overdischarge, overcurrent (charge/discharge), and short-circuit thresholds optimized for the BQ29707 configuration, eliminating the need for an external MCU supervisor. The device operates directly from the cell and drives external N-channel MOSFETs that disconnect the pack from the system during a fault. A battery protection IC (often called a "secondary protector" or "battery management IC for protection") sits between a single Li-Ion/Li-Po cell and the host load. It continuously samples the cell voltage through Vdd and the pack current through the voltage drop across the external FETs (Vds sensing). When a fault threshold is crossed, the device latches off or releases the charge (CHG) and discharge (DSG) FET gates, isolating the cell to prevent fire, swelling, or capacity loss. The BQ2970 family is the cost-down alternative to TI's higher-feature fuel gauges such as the BQ28z610 and BQ34z100, and pairs naturally with the BQ27421-G1A gauge IC for smart-pack designs. Key features include a 0 V charge-disabled function, a wide operating temperature range from -40 °C to +85 °C, factory-trimmed thresholds requiring no external programming resistors, and ultra-low quiescent current in both normal and power-down modes. The part offers overcurrent detection on both charge and discharge paths and dedicated short-circuit protection with sub-millisecond response, all on the same die. Internally the BQ29707DSER uses a precision bandgap reference and a comparator ladder matched to the cell chemistry. The FET driver is a charge-pump architecture capable of holding the external N-FET gates above Vdd during normal operation while pulling them to ground rapidly when a fault is triggered. The result is a single-chip protector with predictable behavior across the full cell state-of-charge window. Typical applications include single-cell smart-phone spare batteries, wearable packs, TWS earbud charging cases, IoT sensor nodes, and any compact single-cell Li-Po pack that previously used a discrete comparator + dual-FET protection circuit. The 6-WSON footprint suits 1S packs with board space below 4 mm x 4 mm. When designing, ensure the external N-FETs are logic-level types with low gate threshold, and add an RC snubber on Vdd close to the IC to ride out load transients. The 0 V charge inhibit is factory-set and cannot be disabled; verify that it matches your charger requirements. This page synthesizes distributor stock and pricing, drop-in pin-compatible alternatives, and practical layout notes not found in the manufacturer datasheet.
BQ2982 - High-Side 1S Li-Ion Protector with Charge Pump | Texas Instruments
The Texas Instruments BQ2982 is a high-side single-cell Li-ion/Li-polymer battery protector featuring an integrated charge-pump NFET driver, overvoltage, undervoltage, overcurrent during charge (OCC), overcurrent during discharge (OCD), short-circuit during discharge (SCD), and zero-volt recovery support, housed in a compact 8-pin X2QFN (1.5 mm × 1.5 mm) package. Headline parameters include ±10 mV typical overcurrent detection accuracy, support for sense resistors as low as 1 mΩ, and a 1-series (1S) Li-ion/Li-polymer cell configuration. What is a battery protector? A battery protector is a dedicated safety IC that monitors a rechargeable cell's voltage, current, and temperature, and disconnects the cell from the load or charger when an unsafe condition is detected. Within the broader taxonomy, the BQ2982 is a single-cell Li-ion protector, a sub-category of battery management ICs (BMICs), which themselves sit under power management semiconductors. Compared with general-purpose fuel-gauge ICs, protectors focus on fast hardware-level cutoff rather than coulomb counting. Key features include the high-side NFET drive architecture (which keeps the protection FETs on the positive rail for simpler PCB layout and lower Rdson sensitivity to cell voltage), the integrated charge pump that maintains a constant VGS across the protection FET regardless of cell state-of-charge, and tight overcurrent thresholds that allow designers to use very low-value sense resistors (1 mΩ) for improved thermal efficiency. The X2QFN package footprint is among the smallest available for primary protection ICs, suiting space-constrained wearables and phones. Technically, the BQ2982 uses a precision bandgap reference, a temperature-compensated current-sense comparator, and programmable delay timers (latch or auto-recover modes). The device supports both latched and auto-recovery output modes, allowing system designers to choose between hard shutdown (e.g., for SCD) and recoverable fault clearing (e.g., for temporary overload). Communication with the host is non-existent on this dedicated protector - all configuration is hardware-strapped via external resistors. Typical applications include smartphones, tablets, power banks, wearables, TWS earbud charging cases, and other single-cell Li-ion/Li-polymer battery packs where high-side switching and ultra-low quiescent current are required. The device is also used in flash/fast-charging architectures where the high-side drive allows the system to maintain consistent FET Rdson during high inrush events. When designing with the BQ2982, ensure the CTLC pin capacitor value matches the desired fault delay timing per the datasheet formulas, and use Kelvin-sense routing between the SRP/SRN pins and the sense resistor to preserve overcurrent accuracy. Always include TVS protection across the cell terminals and place the protector close to the cell to minimize parasitic inductance. This page synthesizes distributor pricing, drop-in alternatives from the BQ298xx family, and practical design notes not found in the manufacturer datasheet alone, giving a complete procurement and design reference for the BQ2982.
BQ34210IPWRQ1 - Automotive 1-Series CEDV Fuel Gauge | TI
The Texas Instruments BQ34210IPWRQ1 is an automotive-qualified 1-series cell system-side CEDV (Compensated End-of-Discharge Voltage) fuel gauge with integrated End-of-Service (EOS) determination, housed in a 14-pin TSSOP (PW) package. The device provides State-of-Charge (SOC), State-of-Health (SOH), and runtime predictions for single-cell Li-Ion, LiFePO4, and NiMH battery packs that experience infrequent discharge cycles such as eCall backup batteries and UPS systems. A battery fuel gauge is a mixed-signal IC that estimates remaining capacity and battery health by combining coulomb counting with voltage, current, and temperature measurements. Within the broader power-management hierarchy, the BQ34210-Q1 sits in the Battery Management category, complementing chargers and protection switches. Unlike impedance-tracking gauges that demand frequent load cycles to remain accurate, the CEDV algorithm is specifically tuned for batteries that sit at near-full charge for long periods, making it a specialized alternative to TI's bq27xxx Impedance Track family. Key specifications include a 14-pin TSSOP (PW) footprint, I2C communication for host MCU access, support for 1-series cell chemistries (Li-Ion / LiFePO4 / NiMH), and an automotive-grade temperature range. The device draws minimal current during periodic wake cycles to update self-discharge compensation, maintaining accurate remaining capacity even after months of float-charge operation. End-of-Service detection flags batteries whose impedance or capacity degradation indicates imminent failure. The BQ34210-Q1 features an integrated sense resistor interface, programmable alarm outputs for low-battery and EOS conditions, and compatibility with TI's Battery Management Studio (bqStudio) for parameter configuration. Its compact TSSOP-14 footprint minimizes PCB area in space-constrained modules such as telematics control units and emergency-call backup packs. Typical applications include automotive eCall backup batteries, asset tracking device primary cells, UPS backup modules, medical device standby batteries, IoT sensor nodes, and emergency lighting battery packs. The EOS prediction function allows fleet operators to replace batteries proactively before they fail in service. When designing with the BQ34210-Q1, ensure the sense resistor value is correctly programmed into the device's data flash to match the application load range. Account for I2C pull-up resistors on the host interface, and verify the thermistor beta and configuration match the chosen cell chemistry. This page synthesizes distributor pricing, drop-in alternatives, application notes, and design guidance not aggregated on a single manufacturer page, including same-package options and practical integration tips.
BQ40Z80RSMR - 2-6S Li-Ion Battery Pack Manager | Texas Instruments
The Texas Instruments BQ40Z80RSMR is a fully integrated 2-series to 6-series Li-ion and Li-polymer battery pack manager with Impedance Track™ gas gauging in a 32-pin VQFN (RSM) 4x4 mm package. It combines analog protection, gauging, cell balancing and authentication in a single chip, targeting 5 V to 24 V battery packs used in power tools, e-bikes, UPS, medical carts, and 1- to 6-cell portable equipment. A battery pack manager is the heart of a smart battery; it measures individual cell voltages, pack current, and temperature, then derives remaining capacity and state-of-health while enforcing protection limits. The BQ40Z80 belongs to the category hierarchy battery management IC > gas gauge + protector > battery pack manager > power management IC, complementing the charger and protection MOSFETs in the system. Impedance Track is TI's patented coulomb-counting-plus-modeling approach that learns cell impedance at every cycle to deliver accurate runtime prediction even under varying loads and aging. Key features include 2S to 6S cell support, integrated CC-CV charge profile control via SMBus, hardware secondary protection, 18-bit integrated delta-sigma A/D for cell voltage measurement, on-chip cell balancing drivers, SHA-1/ECC authentication with secure memory, and eight multifunction pins configurable as thermal inputs, GPIO, LEDs, or display-button. Integrated sense resistors and a high-side N-FET drive architecture simplify protection MOSFET selection. The device communicates over SMBus v1.1 with optional 400 kHz I²C compatibility and offers an LED display driver for 4- or 5-segment SOC indication. On-chip non-volatile memory stores chemistry profiles, learned parameters, and a 64-bit pack ID for traceability. The 4x4 mm QFN footprint enables compact pack designs while providing a thermal pad for heat spreading during high-discharge balancing. Typical applications include cordless power tool packs, robotic vacuum cleaners, e-bike and e-scooter battery packs, medical infusion pumps, and hot-swap server backup modules. The wide 4.5 V to 32 V operating range tolerates the inductive transients common in motor-driven systems. Designers select the BQ40Z80 when an integrated gauge+protector+authenticator saves PCB area versus discrete solutions like separate AFE plus MCU. When designing, observe the SMBus address selection pin to avoid collisions with a system charger, and follow the cell-balancing resistor sizing in the datasheet to keep balance current within thermal limits. Pair this gauge with TI's BQ25620 charger IC for a complete pack+system solution. This page synthesizes distributor pricing, drop-in alternatives within the same 32-VQFN package, and practical design notes not found in the manufacturer datasheet.
BQ40Z80RSMT - 2-6S Li-Ion Battery Pack Manager | TI
The Texas Instruments BQ40Z80RSMT is a fully integrated, single-chip 2-series to 6-series Li-ion and Li-polymer battery pack manager that uses TI's Impedance Track™ technology for accurate gas gauging, housed in a 32-pin VQFN (4x4 mm) package with exposed thermal pad. A battery management IC (BMIC) such as the BQ40Z80RSMT belongs to the broader category of power management semiconductors. It combines a precision analog front end, an MCU core, non-volatile memory, and firmware-based gas gauging algorithms. The Impedance Track™ family sits hierarchically under fuel gauge IC -> battery management IC -> power management -> mixed-signal semiconductor, and is designed to compute remaining battery capacity using cell voltage, current, temperature and a learned impedance model rather than simple coulomb counting. Key features of the BQ40Z80RSMT include support for 2S to 6S cell packs, integrated cell balancing, programmable protection thresholds (over-voltage, under-voltage, over-current, short-circuit, over-temperature), SHA-1/HMAC authentication for security, a 16-bit delta-sigma ADC for voltage and current measurement, and an I²C/SMBus-compatible communication interface. The device supports host-side charging control via SMBus and reports state-of-charge, state-of-health, runtime, cycle count and cell voltages through standard SBS commands. Technically, the part operates from a battery stack of up to 25.2 V nominal (6S Li-ion fully charged), with internal LDOs generating the logic and analog supplies from the pack. Its Impedance Track™ algorithm dynamically learns each cell's chemistry behavior, allowing reported remaining capacity to track within 1% accuracy under most operating conditions. The compact 32-VQFN footprint reduces board area, while the exposed pad provides the low thermal resistance needed for sustained high-current discharge. Typical applications include multi-cell battery packs for notebook computers, power tools, e-bikes, e-scooters, UPS backup systems, medical carts, and 12V/18V/24V portable equipment. The integrated authentication makes the BQ40Z80RSMT well suited to OEM-branded packs where clone prevention matters. When designing with the BQ40Z80RSMT, allocate a low-impedance ground return for the sense resistor and route the cell-balance FETs to minimize parasitic conduction paths. Follow TI's BQ40Z80 EVM layout exactly when reusing cell-balancing, NTC thermistor and FET-driver sections to pass TI's validated gas-gauging cycle tests. This page synthesizes real distributor pricing, drop-in same-brand alternatives, and practical design considerations drawn from the BQ40Z80 datasheet and reference manual — content not bundled on any single manufacturer or distributor product page.
BQ41Z50RSNR - 2-4S Cell Battery Pack Manager, Dynamic Z-Track | TI
The Texas Instruments BQ41Z50 (BQ41Z50RSNR) is a fully integrated, single-chip battery pack manager with Dynamic Z-Track technology that supports 2-series, 3-series, and 4-series Li-ion, LiPO, and LiFePO4 battery packs. It combines gas gauging, hardware protection, cell balancing, and authentication in a 32-pin QFN (4x4 mm, RSN) package, and runs on an ultra-low-power 32-bit RISC processor with integrated high-performance analog peripherals. A battery fuel gauge IC (also called a battery management IC, gas gauge, or pack manager) is a mixed-signal SoC that monitors cell voltage, current, and temperature to compute State-of-Charge (SOC) and State-of-Health (SOH) while enforcing safety limits for charge, discharge, short-circuit, and over-temperature events. Battery management ICs sit within the hierarchy: battery management IC -> power management IC -> semiconductor device. Key features of the BQ41Z50 include Dynamic Z-Track adaptive impedance learning, which updates impedance tracking during real load transients for tighter SOC accuracy, plus integrated charge/over-discharge/over-current/overtemperature protection, SHA-1 authentication, and support for 2S-4S multi-chemistry cell configurations. The integrated analog front end includes a 16-bit delta-sigma coulomb counter and a high-accuracy ADC for cell voltage measurements. Typical applications include portable power banks, power tools, e-bike and e-scooter battery packs, medical infusion pumps, telecom backup batteries, and any 2S-4S Li-ion/LiFePO4 pack that needs high-accuracy gauging with hardware safety protection. Designers use the BQ41Z50EVM evaluation module and TI's Battery Management Studio (bqStudio) GUI for firmware development and chemistry tuning. When designing with this device, ensure each cell input has an RC filter for noise rejection, follow TI's reference layout for the high-current ground return, and use TI's bqStudio to configure chemistry parameters and protection thresholds. Compared with BQ40Z50-R5, the BQ41Z50 firmware format is not interchangeable per the TI E2E forum; verify replacement firmware before reuse. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including same-brand variants and verified pin-compatible substitutes.
BQ41Z90 - 3-16 Cell Battery Fuel Gauge with IT-DZT | TI
The Texas Instruments BQ41Z90 is a highly integrated 3-to-16 series cell battery pack manager that combines a flash-programmable 32-bit processor, hardware protection, and integrated SHA-1/SHA-2/EC-KCDSA authentication responder in a single IC. According to the manufacturer datasheet, the device supports Li-ion, LiFePO4, NiMH, and Li-polymer chemistries across stacks of 3 to 16 cells in series, with communications handled by SMBus v3.2 or I2C-compatible interfaces. A battery fuel gauge is a type of battery management IC (BMIC) that estimates the remaining state-of-charge (SoC), state-of-health (SoH), and runtime of a rechargeable battery pack by coulomb counting, voltage tracking, and impedance-based modelling. The BQ41Z90 sits in the hypernym hierarchy battery fuel gauge -> battery monitor -> battery management IC -> power management IC -> semiconductor. The TI IT-DZT (Impedance Track with Dynamic Z-Track) algorithm extends standard Impedance Track technology by capturing cell impedance under dynamic load profiles, which improves accuracy during transients such as EV acceleration pulses or power-tool bursts. Key features include an ultra-low-power high-speed 32-bit processor core, on-chip flash for application firmware, hardware-based safety protection including over-voltage, under-voltage, over-current, short-circuit, and overtemperature comparators, an NMOS protection FET driver, ECC (elliptic-curve cryptography) authentication, and integrated protection FET drivers. The device integrates an array of peripheral I/O and supports both high-side and low-side N-FET protection topologies with configurable thresholds stored in on-chip flash registers. The BQ41Z90 architecture combines an ARM Cortex-M0-class 32-bit core, a high-accuracy coulomb counter ADC, a 16-bit voltage ADC for cell-stack telemetry, on-die temperature sensors, and a dedicated authentication block that responds to host-side SHA-1, SHA-2, or EC-KCDSA challenges. Per the datasheet, this combination eliminates the external MCU + dedicated AFE two-chip approach used in legacy designs and reduces BOM by approximately 30 percent. Typical applications include multi-cell power banks, e-bikes and e-scooters, power tools, robotics battery packs, e-mobility and light-EV battery packs, and uninterruptible power supply (UPS) battery modules that require both accurate fuel gauging and pack-level hardware protection. When designing with the BQ41Z90, observe that this part requires TI's BQStudio configuration tool for golden-image flash programming and that production authentication keys must be provisioned per the TI security lifecycle flow. Plan for the WAKE pin behaviour referenced in the datasheet section 7.3.1.2.2.4 and add an external pull-up if the application idles in shipping mode. This page synthesizes distributor pricing, parametric comparison tables, drop-in alternatives, and practical design notes that go beyond what is published in the manufacturer datasheet PDF.
BQ500414Q - Automotive Qi Wireless Power Controller | Texas Instruments
The Texas Instruments BQ500414Q is an AEC-Q100 qualified automotive-grade digital wireless power controller designed for Qi-compliant free-positioning wireless charging systems. It is available in a 48-pin VQFN (7x7 mm) package and operates over a temperature range from -40°C to 85°C, making it suitable for automotive environments. The controller implements the WPC v1.1 A6 transmitter specification and is optimized for 12-V supply systems, though it can support other supply voltages. What is a wireless power controller? A wireless power transmitter controller is a specialized power management IC that manages the power transfer between a transmitter and a receiver using inductive coupling. It coordinates the coil switching, modulates the power signal, and communicates with the receiver through the Qi protocol to ensure safe and efficient charging. The BQ500414Q simplifies designs by integrating the control logic, I2C interface, and LED drive outputs, reducing the external component count and system complexity. Key features of the BQ500414Q include direct driving of three LED outputs through pins 7, 8, and 9 using a simple current-limit resistor (typically 470 ohms), which provides visual status indication without additional driver ICs. The I2C interface enables communication with host controllers, allowing system-level monitoring and configuration. The free-positioning capability of the controller supports multi-coil arrangements, enabling convenient placement of receivers on the charging surface. The BQ500414Q is designed for automotive applications where robustness and reliability are critical. Its AEC-Q100 qualification ensures it meets stringent automotive quality standards. The device is WPC v1.1 ready, conforming to the Qi wireless charging standard for interoperability with compliant receivers. The transmitter type A6 specification defines the coil geometry and power transfer characteristics, and the controller is optimized for 12-V systems, which are common in automotive power architectures. Typical applications include in-cabin wireless phone chargers, aftermarket charging pads, and industrial or medical devices requiring wireless power. The device's EEPROM-programmable parameters allow customization for specific system requirements, and the integrated LED drivers simplify user feedback. When designing with this controller, pay careful attention to the thermal management of the power stage and the layout of the coil driver circuitry, as these directly influence charging efficiency and EMI performance.
BQ51013A - Qi Wireless Power Receiver PMIC | TI
The Texas Instruments BQ51013A is an integrated Qi-compliant (WPC 1.1) wireless power receiver IC that performs AC/DC power conversion in a 20-pin VQFN (3.5x4.5 mm, RHL) package. Per TI datasheet SLUSBA2, the device delivers a regulated 5V output from the receiver coil with up to 1.5 A output current and reaches 93% overall peak AC-DC efficiency, eliminating the need for a separate rectification stage plus LDO combination. Qi wireless charging is a tightly-coupled inductive power transfer method standardized by the Wireless Power Consortium (WPC). A transmitter (TX) coil generates an alternating magnetic field at ~110-205 kHz, and a receiver (RX) coil coupled to that field induces an AC voltage which the receiver IC must rectify, regulate, and present as a clean DC rail. The BQ51013A integrates the full receiver signal chain: synchronous rectification, dynamic rectifier voltage control, communication demodulation, and a 5V LDO post-regulator, so engineers can power a load or feed a downstream charger with one part. Key features include a built-in I2C interface for status reporting, dynamic power limiting (DPL) to handle thermal constraints, and foreign-object detection (FOD) compliance per the WPC Qi specification. The IC supports Qi 5W baseline power profiles and operates from the rectified coil voltage (RECT pin) up to 7V, with over-voltage, over-current, and thermal-shutdown protections. Communication back to the TX is handled through load modulation and a single-bit demodulator, providing the WPC-defined packets required for authentication and power control. The architecture combines a full-bridge synchronous rectifier with a hysteretic-mode buck converter to produce the regulated 5V output. Adaptive rectifier voltage control keeps the rectifier just above the input to maximize efficiency across load and coupling variations, and the integrated 5V LDO with low-dropout performance ensures a low-noise rail for downstream ICs. FOD is implemented via Q-factor measurement of the resonant tank before and during power transfer, allowing the part to detect metal objects that would otherwise overheat. Typical applications include Qi wireless charging pads for smartphones and wearables, medical-device charging cradles, low-power IoT charging stations, and any portable product requiring cable-free charging from a WPC-compliant transmitter. Design considerations include coil selection (the WPC A11/A6a coil is the most common reference design), thermal management of the receiver PCB, and proper I2C address configuration when multiple receivers share a bus.
BQ51013C-Q1 - 5W Qi Wireless Power Receiver | Texas Instruments
Texas Instruments BQ51013C-Q1 is an automotive, fully integrated wireless power receiver PMIC with up to 5 W of delivered output power, WPC v1.3 communication control, and a 20-pin VQFN package measuring 3.5 mm by 4.5 mm. The device combines receiver AC-to-DC conversion, a low-resistance synchronous rectifier, an LDO, digital control, and voltage and current loops in one IC. Its integrated architecture supports portable wireless-charging products and is qualified for automotive applications according to the verified component listing. A wireless power receiver is the secondary-side device in an inductive charging system. It receives energy from a transmitter through a receiver coil, converts the alternating coil voltage into a regulated DC output, and communicates with the transmitter. The BQ51013C-Q1 places the Qi communication protocol, rectification, regulation, and control functions between the receiver coil and the powered load, reducing the number of external ICs required for a Qi v1.3 receiver design. The verified manufacturer material highlights a 93% peak AC-DC efficiency target in the family datasheet text, full synchronous rectification, accurate voltage and current loops, and output-voltage conditioning. These features are relevant when designing a compact receiver whose power loss can become heat inside a phone, accessory, or automotive console. The Q1 device is intended for automotive wireless-power applications, while the product-family information identifies the BQ51013C family as delivering up to 5 W. Typical applications include 5 W wireless charging for portable devices, automotive center-console charging pads, accessory power for battery-operated products, and embedded wireless-power modules where the receiver IC must sit close to a coil and provide controlled DC output. The receiver-side architecture is important: coil coupling, alignment, thermal conditions, communication timing, output loading, and the downstream power path all affect the user experience. For implementation, follow the manufacturer datasheet for the RHL package pinout, recommended coil and capacitor values, PCB layout, thermal design, and communication timing. Do not infer unverified electrical limits or pin functions from a distributor listing. This page combines verified manufacturer and distributor information with engineering-oriented selection and design guidance; current pricing, stock, and detailed electrical values must be confirmed against the cited sources.
BQ51013CRHLR - 5W Qi v1.3 Wireless Power Receiver | Texas Instruments
The Texas Instruments BQ51013CRHLR is a fully integrated wireless power receiver PMIC for secondary-side portable-device charging, delivering up to 5W through a WPC Qi v1.3-compatible interface from a 20-pin RHL VQFN package. The verified product data identifies a 3.5 mm by 4.5 mm package, an operating range of -40 °C to 125 °C, and up to 93% overall peak AC-DC efficiency. It combines receiver AC-DC conversion, synchronous rectification, output-voltage conditioning, and digital communication control, allowing the receiver IC to sit between the RX coil and regulated output. A wireless power receiver is the secondary-side device in an inductive charging system. It receives alternating energy from a transmitter coil, converts that energy to DC, regulates the output, and communicates with the transmitter to establish and maintain Qi power transfer. Within the hierarchy wireless power receiver -> power management IC -> battery-management subsystem -> portable-device charger, the BQ51013CRHLR concentrates the power-conversion and negotiation functions needed for a compact receiver design. The verified data lists full synchronous rectification, output-voltage conditioning, WPC v2.0 communication control in one search result, and WPC Qi v1.3 compliance in the Texas Instruments product listing. Only one IC is required between the receiver coil and output according to the indexed datasheet description. These features can reduce external circuitry and simplify portable-device charger development while supporting a maximum output class of 5W. The receiver architecture uses an integrated rectification and regulation stage rather than relying on a discrete diode and separate regulator implementation. Full synchronous rectification can reduce conduction loss compared with a simple diode path, while the reported 93% peak efficiency quantifies conversion performance at its best operating point. Actual efficiency depends on coil coupling, input power, output voltage, load, temperature, and PCB layout, so the peak rating should not be treated as a constant under every condition. Typical uses include 5W wireless charging for wearables, earbuds, mobile accessories, and portable consumer products. The compact package supports space-constrained receiver hardware, while the -40 °C to 125 °C specified temperature range covers industrial-temperature design needs. A product designer still must validate the selected receiver coil, output network, thermal performance, foreign-object behavior, and enclosure geometry. The primary design consideration is preserving coil coupling and high-frequency electrical performance. Follow the manufacturer layout guidance, keep the receiver coil and compensation network close to the IC, provide the required output capacitance, and route high-current paths with minimal loop area. Wireless-power efficiency is a system result involving the transmitter, coil, alignment, shield, load, and board implementation, not only the receiver IC. This page consolidates the verified distributor listings, Texas Instruments product information, package details, efficiency claims, pricing indication, and design considerations into one engineering reference. It also clearly separates verified facts from unavailable specifications and avoids presenting unverified substitute parts as drop-in replacements.
BQ51050B - Qi Wireless Power Receiver & Li-Ion Charger | TI
The Texas Instruments BQ51050B is a Qi (WPC) v1.2 compliant highly integrated secondary-side wireless power receiver that combines a low-impedance synchronous rectifier, low-dropout regulator (LDO), digital control, charger controller, and accurate voltage/current loops in a single 20-VQFN (RHL, 3.5x4.5 mm) or 28-DSBGA (YFP) package. The device delivers up to 1.5 A charging current, supports output voltage options of 4.20 V / 4.35 V / 4.40 V for Li-Ion/Li-Polymer chemistry, and achieves 93% overall peak AC-DC efficiency through 100 mOhm (typical) synchronous N-MOSFET switches. A wireless power receiver (also called a Qi Rx or wireless charging receiver IC) sits between the receiver (Rx) coil and the battery in a Qi-charged device; it captures the AC magnetic field from a Wireless Power Consortium (WPC) Qi-compliant transmitter coil, rectifies it to DC, regulates the rail, and feeds a charging algorithm to the battery. In the broader system hierarchy it belongs to power management ICs -> battery chargers -> wireless charging front-ends -> semiconductor. Key features include WPC v1.2 communication control, programmable charge current via an external resistor, dynamic rectifier clamp that prevents over-voltage on the RX coil at light load, and integrated thermal protection with an internal thermal shutdown. The chip also provides a STAT1/STAT2 status output pair and a CHG flag for host interrogation. Availability of single-wire communication pins allows a system microcontroller to monitor charge state and fault conditions. The BQ51050B uses a bipolar-CMOS-DMOS (BCD) process that integrates the rectifier MOSFETs directly on-die, eliminating external Schottky diodes and shrinking the BOM to the RX coil and a few passives. The output LDO cleans residual 100 kHz ripple from the synchronous rectifier, providing clean rail voltage to the system load and battery management circuit. Typical applications include Qi-charging sleeves for smartphones, wearable fitness bands, true-wireless earbud charging cases, low-power IoT sensors, and medical patches that need to be sealed against liquid ingress. The compact 3.5x4.5 mm VQFN package is engineered for space-constrained wearable and hearable designs where every square millimeter of PCB is at a premium. When designing with the BQ51050B, observe the layout rule that the resonant RX tank capacitor must be placed within 2 mm of the AC1/AC2 pins to minimize radiated EMI. Also note that the AD pin sense resistor sets maximum charge current; an incorrect value may cause the device to enter thermal regulation prematurely at high ambient temperatures. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes - including thermal derating guidance and EMI mitigation - not aggregated on the manufacturer datasheet homepage.
BQ51051B Qi Wireless Power Receiver | Texas Instruments
The Texas Instruments BQ51051B is an integrated, Qi-compliant wireless power receiver and lithium-ion battery charger with a 20-VQFN package option. The verified product data identifies it as a wireless power receiver PMIC and states that the device integrates a low-impedance synchronous rectifier, low-dropout regulator, digital control, charger controller, and accurate voltage and current loops. The power stage uses low-resistance N-channel MOSFETs with 100 mΩ typical RDS(on) to support high efficiency and low power dissipation. What is a wireless power receiver IC? A wireless power receiver IC receives energy transferred through an electromagnetic field from a Qi-compatible transmitter, rectifies the received AC power, regulates the resulting DC rail, and can charge a connected battery. In the power-management hierarchy, the BQ51051B belongs to the wireless charging receiver and battery charger class rather than acting as a general-purpose voltage regulator. Its receiver front end, charger control, and power conversion functions are integrated to reduce the number of external power-stage components. The BQ51051B family is described by Texas Instruments as high-efficiency and Qi v1.2-compliant in the supplied search results. The available package options include BQ51051BRHLR in a 20-VQFN package measuring 3.5 mm by 4.5 mm. The series also includes BQ51051BYFPT in a 28-DSBGA package. The verified data does not provide a single universal package for the family, so the exact package must be selected from the orderable MPN. Key engineering benefits include integration of the receiver rectifier, LDO, charger control, and digital loops, along with 100 mΩ typical RDS(on) for the synchronous-rectifier and LDO power stage. These integrated functions are intended to improve system efficiency and reduce board complexity compared with a discrete receiver implementation. The exact receiver power rating, coil configuration, battery voltage range, current limit, and thermal limits require the manufacturer datasheet and are not supplied in the verified snippets. Typical applications include Qi-compatible wireless power receivers in consumer electronics, battery-powered accessories, and embedded charging platforms. In a practical design, the receiver is placed behind the transmitter coil and followed by the required input, output, and battery filtering components defined by the datasheet. Designers should preserve the recommended coil geometry and copper layout because coupling efficiency depends on alignment, inductance, resistance, and shielding conditions. The main design consideration is package-specific implementation. BQ51051BRHLR uses a 20-VQFN package, while BQ51051BYFPT uses a 28-DSBGA package; they are not interchangeable without a footprint and pinout review. This page distinguishes the family from an exact orderable part and flags specifications not present in the supplied verified data as [DATA_NEEDED].
BQ7694204PFBR - 10-Series Li-Ion Battery Monitor | TI
The Texas Instruments BQ7694204PFBR is a high-accuracy 3-series to 10-series battery monitor and protector IC for Li-ion, Li-polymer, and LiFePO4 battery packs, housed in a 48-pin TQFP (7x7 mm) package. The '04' orderable suffix denotes the specific cell-count and feature configuration of the BQ76942 family, supporting up to 10 series cells with integrated analog front-end, protection, and balancing functions. The device includes a high-accuracy coulomb-counter ADC, on-chip cell-balancing FET drivers, and a configurable hardware protection subsystem. A battery monitor IC is a mixed-signal analog front-end that continuously samples individual cell voltages, pack current, and temperature to compute state-of-charge (SOC), state-of-health (SOH), and to trigger pack-level protections such as over-voltage, under-voltage, over-current, and short-circuit. Within the broader hierarchy, a battery monitor sits below the battery management system (BMS) IC and above discrete analog front-ends; BQ7694204PFBR integrates the AFE, secondary protection, and the high-side charge/discharge FET drivers into a single chip, replacing what traditionally required multiple discrete components. This integration reduces BOM count, PCB area, and software complexity in multi-cell battery packs. Key features of the BQ7694204PFBR include 16-bit voltage measurement resolution, on-board charge/discharge FET drivers with built-in precharge/pre-discharge control, integrated cell-balancing FETs, hardware-configurable protection thresholds independent of firmware, and support for both standalone (no host MCU) and host-controlled operation. The wide common-mode input range allows direct cell-voltage sensing up to 55 V, eliminating external resistive dividers on each cell. Architecturally, the BQ7694204PFBR uses a dedicated state-machine plus registers approach so that critical protections can react within microseconds even before any host MCU boots. Communication to the host is via I2C or SPI, and an isolated daisy-chain interface (using companion BQ79600 or BQ79601-Q1 transceivers) enables 100-series stacks for higher-voltage traction packs. Typical applications include e-bike and e-scooter battery packs, 24V/36V cordless power tools, uninterruptible power supplies (UPS), telecom backup battery racks, portable medical carts, and 48V light-electric-vehicle packs. The integrated precharge driver also simplifies hot-plug and capacitive-load designs. When designing with the BQ7694204PFBR, allocate sufficient PCB copper under the thermal pad of the TQFP-48; sustained balancing currents at high cell-count imbalance can dissipate 500 mW or more. Use TI's BQSTUDIO evaluation tool to configure protection thresholds and calibration data during development. This page synthesizes distributor pricing, drop-in same-package alternatives from the BQ76942 family, application guidance, and design notes not assembled in the manufacturer datasheet.
BQ76952 - 3S-16S Battery Monitor & Protector | Texas Instruments
The Texas Instruments BQ76952 is a highly integrated, high-accuracy battery monitor and protector for 3-series to 16-series Li-ion, Li-polymer, and LiFePO4 battery packs. It combines a high-accuracy monitoring system, a highly configurable protection subsystem, and autonomous or host-controlled cell balancing in a 48-pin TQFP (7x7 mm) package. A battery monitor and protector is an integrated circuit at the heart of a battery management system (BMS) that measures individual cell voltages, pack current, and temperature, and provides protection against overvoltage, undervoltage, overcurrent, and overtemperature faults. Within the BMS hierarchy (battery pack -> BMS AFE -> analog front end -> power management IC), the BQ76952 acts as the AFE, communicating with a host microcontroller for state-of-charge estimation, balancing, and safety. Integrated high-side charge-pump NFET drivers control external power FETs for pack-level disconnect. Key features include support for 3S-16S Li-ion, Li-polymer, and LiFePO4 chemistries; a configurable protection subsystem covering current, voltage, and temperature faults; autonomous or host-controlled cell balancing; integrated high-side charge-pump NFET drivers; and temperature sensing through external thermistors plus internal die measurement. According to the BQ76952 Technical Reference Manual, up to 9 thermistors are supported in addition to internal die temperature. The standard BQ76952 uses I2C communication with CRC disabled by default; the BQ7695202 variant enables CRC on I2C by default. Architecturally, the device pairs a precision differential ADC (each cell voltage measured differentially, VC1-VC0 through VC16-VC15) with a dedicated protection engine that operates autonomously during critical faults, so protection does not depend on the host. TI application note SLUAAF2 documents pin-equivalent diagrams across the BQ76952, BQ76942, and BQ769142 family, confirming pin-compatible drop-in migration: the BQ76942 is optimized for up to 10S packs, and the BQ769142 is functionally the same as the BQ76952 except I2C CRC is enabled by default. Typical applications include e-bike and e-scooter packs, power tool packs, energy storage systems, UPS backup, portable equipment, and industrial robots. High-side NFET drivers minimize external components while configurable protections address short circuit, overcurrent, voltage, and temperature events. Design tip: size protection FETs for pack current, terminate unused high-voltage pins per the TI datasheet recommendations, and confirm I2C CRC requirements before choosing between BQ76952, BQ769142, and BQ7695202 variants.
BQ7695202PFBR - 3-16S Battery Monitor Protector | Texas Instruments
The Texas Instruments BQ7695202PFBR is a 3-series to 16-series high-accuracy battery monitor and protector for Li-ion, Li-polymer, and LiFePO4 battery packs, housed in a 48-pin TQFP (PFB, 7x7 mm) package rated from -40C to +85C. A battery monitor and protector IC (also called a battery management IC or BMS AFE, analog front end) sits at the core of multi-cell battery packs. It measures individual cell voltages, pack current, and temperature, then drives external protection FETs to prevent overcharge, over-discharge, overcurrent, and short-circuit conditions. In the power-management hierarchy it belongs to the battery management (PMIC - Battery Management) class of power management ICs. Key features of the BQ7695202 include support for 3 to 16 series cells, high-accuracy cell voltage monitoring for precise state-of-charge and state-of-health estimation, integrated cell balancing, and integrated high-side charge-pump NFET drivers that eliminate the need for external driver circuitry. The part also integrates two programmable LDO regulators for powering external system components such as microcontrollers or fuel-gauge peripherals. Technically, the device integrates a host communication peripheral supporting 400-kHz I2C, SPI, and HDQ one-wire standards, giving designers flexibility in how the pack connects to a system-side MCU. The protector state machine operates autonomously so protection decisions continue even if host communication is lost, an important safety property for lithium-based packs. High-accuracy measurement reduces guard bands, allowing fuller use of the battery capacity. Typical applications include e-bikes and light electric vehicles, power tools, portable instrumentation, UPS and energy-storage modules, and robotic or drone battery packs using Li-ion, Li-polymer, or LiFePO4 chemistries in the 3S to 16S range. Design consideration: because the BQ76952 drives high-side NFETs through an internal charge pump, verify FET selection and gate-charge limits against the datasheet, and follow TI layout guidance for Kelvin-sensed cell connections to preserve measurement accuracy. This page synthesizes verified distributor listings, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
BQ76952PFBR - 3S-16S High-Accuracy Battery Monitor | TI
The Texas Instruments BQ76952PFBR is a 3-series to 16-series high-accuracy battery monitor and protector for Li-Ion, Li-Polymer, and LiFePO4 battery packs, operating from 4.7 V to 80 V and housed in a 48-pin TQFP (7x7 mm) package. It integrates cell voltage monitoring, coulomb counting support, cell balancing, and integrated high-side charge-pump NFET drivers for charge and discharge protection FETs. A battery monitor and protector is a power-management IC at the core of a battery management system (BMS), sitting between the multi-cell stack and the system host. It measures each series cell's voltage and pack current, enforces safe operating limits through hardware protections, and communicates status to a microcontroller over I2C, SPI, or HDQ. In the system hierarchy, it belongs to battery management ICs within power management semiconductors. Key features include support for 3 to 16 series cells with high measurement accuracy, protection of overvoltage, undervoltage, overcurrent, short circuit, and overtemperature conditions, integrated cell balancing FETs, and dual programmable LDOs that supply external system circuitry. High-side driver architecture keeps the pack negative terminal at ground, simplifying system grounding. Technically, the device provides 16 cell-voltage input channels and a stack operating range up to 80 V, with a host communication peripheral supporting 400-kHz I2C, SPI, and HDQ one-wire standards, allowing designers to match the interface to the host MCU. Hardware protections operate autonomously even if the host is absent, meeting functional-safety-oriented design patterns for lithium battery packs. Typical applications include 48 V server and telecom backup batteries, e-bike and light electric vehicle packs, portable power stations, and industrial energy storage modules where 10S to 16S Li-ion or LiFePO4 chemistries are common. A key design consideration is the VC0X/VC10X filter-capacitor connections: follow TI's recommended RC input filtering to preserve accuracy under switching-load transients, and verify REG1/REG2 loading budget against external system loads. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not consolidated in the manufacturer datasheet.
BQ76952Q-Q1 - 3-16S Battery Monitor AEC-Q100 | Texas Instruments
The Texas Instruments BQ76952Q-Q1 is an automotive-grade, highly accurate battery monitor and protector for 3-series to 16-series Li-ion, Li-polymer, and LiFePO4 battery packs. It integrates cell voltage monitoring, a configurable protection subsystem, autonomous or host-controlled cell balancing, and high-side charge-pump NFET drivers in a 48-pin TQFP (7x7 mm) package, qualified to AEC-Q100 for automotive BMS designs. A battery monitor and protector is the analog front end (AFE) of a battery management system: it measures each cell's voltage and pack current, detects overvoltage, undervoltage, overcurrent, and over-temperature fault conditions, and drives protection FETs to isolate the pack. It sits above the cell connections and below the pack MCU in the BMS hierarchy, offloading safety-critical measurement and protection from the host processor. Key features include support for up to 16 series cells, an extensive protection suite covering voltage, temperature, current, and internal diagnostics, two independent ADCs for simultaneous monitoring, and an integrated charge pump enabling high-side NFET protection with optional autonomous recovery. High-accuracy cell voltage monitoring enables precise state-of-charge and state-of-health estimation, critical for maximizing usable capacity and pack lifetime. Architecturally, the device can operate autonomously in a stand-alone mode or under host control via I2C/SPI communication with an external MCU, providing flexibility between cost-optimized and feature-rich BMS topologies. The high-side FET driver topology keeps the load negative terminal at pack ground, simplifying system-level design versus low-side approaches. Typical applications include electric vehicle (EV) and hybrid battery packs, e-bikes and e-scooters, energy storage systems (ESS), UPS battery backup, and power tools. The Q1 qualification and wide automotive temperature support make it a fit for traction and auxiliary battery packs. Design consideration: configure the protection thresholds and balancing registers carefully in firmware, and follow TI's pin-equivalent guidance (SLUAAF2) for the high-voltage cell input pins, which include specialized internal circuitry and require proper series input resistors.
BQ7791500PWR - 3-5S Ultra-Low Power Primary Protector | TI
The Texas Instruments BQ7791500PWR is a 3-series to 5-series stackable ultra-low-power primary battery protection IC for Lithium Ion / Lithium Polymer packs, housed in a 24-pin TSSOP (PW) package. It integrates autonomous cell balancing, a HIBERNATE low-quiescent mode, and primary-side overvoltage, undervoltage, overcurrent, and short-circuit protection with programmable thresholds. A primary battery protector is a discrete analog front-end IC that monitors each cell of a multi-cell Li-ion / Li-polymer stack and disconnects the pack via external FETs the instant a parameter crosses its safe operating window. The category sits below the secondary protector / gas-gauge ICs in the safety hierarchy - it does not perform coulomb counting or communicate over SMBus, but it provides the hardware-only safety net required by UL 2054, IEC 62133, and many end-product safety standards. BQ77915-class parts from TI are widely used as the first line of defense in power tools, e-bikes, UPS battery modules, and light-EV battery packs. Key features include support for 3S-5S cell stacks (with external scaling for higher counts via stacking), integrated 100 mA autonomous cell-balancing FETs that operate without a host controller, a HIBERNATE mode that drops the quiescent current to the single-digit microamp range during storage, and a CHG/DSG low-side output pair that drives external N-channel protection MOSFETs. The device is fully autonomous - no firmware, MCU, or SMBus interaction is required. Typical applications include consumer power-tool battery packs (where 5S packs up to 18.5 V are common), e-bike and e-scooter battery modules, portable UPS battery management, and light-EV / LEV traction packs. Compared with BQ769x0 series parts that add secondary protection and analog-to-digital telemetry, the BQ7791500 stays smaller and cheaper while delivering the primary protection required by safety certifications. When designing with this part, choose external N-channel FETs with Vds of at least 40 V for a 5S pack, place the BAT pin RC filter within 5 mm of the IC, and use a 100 kohm NTC on the TS pin for thermal protection. Note that BQ77915 has a sister part, BQ77915-Q1, that adds AEC-Q100 qualification for automotive-grade LEV applications. This page synthesizes distributor pricing, verified same-package drop-in alternatives, and practical design notes that are not found in the manufacturer datasheet alone.
BQ7791506PWR - 3-5S Ultra-Low Power Primary Protector | TI
The Texas Instruments BQ7791506PWR is a 3-series to 5-series stackable ultra-low-power primary protector with autonomous cell balancing, housed in a 24-pin TSSOP (PW) package. It integrates a full suite of voltage, current, and temperature protections for Lithium Ion/Polymer battery packs, with typical quiescent currents of 8 µA in NORMAL mode and 2 µA in HIBERNATE mode. Key specifications include an operating temperature range of -40°C to +85°C, scalable cell count from 3S to 5S in standalone mode (extensible via stacking), and autonomous smart passive cell balancing that removes cell-to-cell imbalance without external MCU intervention. The integrated protection set covers overvoltage, undervoltage, overcurrent in discharge, short circuit in discharge, and overtemperature, providing a complete hardware safety layer that complements secondary gas gauges such as the BQ27421-G1. The BQ7791506PWR uses an analog front-end plus dedicated hardware comparators with user-configurable thresholds via external resistors. Autonomous cell balancing fires when the delta between the highest and lowest cell exceeds a programmable offset, dissipating energy through external resistors until the cells converge. Stackability allows two devices to handle 6S to 10S packs without firmware changes. This hardware-only design means no firmware is required at the host, which reduces BOM complexity and improves functional safety certification paths. Typical applications include power tools, e-bikes, vacuum cleaners, robotic vacuum cleaners, e-mobility scooters, and uninterruptible power supplies where a dedicated hardware protector is preferred over an integrated fuel gauge. The HIBERNATE pin allows the host to force the device into sub-3 µA quiescent to extend shelf life of stored packs. Compared to fully integrated monitor-and-protect fuel gauges, the BQ7791506 leaves fuel gauging to a dedicated IC and focuses solely on the primary safety function. When designing with this device, always validate the sense resistor and cell-balancing resistor thermal budgets against the worst-case continuous balancing current. Use Kelvin-sense routing at the high-current ground return, and keep the cell-balancing traces wide enough to handle the programmed balancing current. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
BQ79600-Q1 - Automotive SPI/UART BMS Bridge IC | TI
The Texas Instruments BQ79600-Q1 is an automotive-grade communication bridge IC that interfaces a host microcontroller (MCU) with TI battery monitoring ICs such as the BQ7961X-Q1 family, in a 16-pin TSSOP (PW) package. It translates SPI or UART host-side traffic into TI's proprietary battery management daisy-chain protocol, enabling robust, scalable communication in battery management systems (BMS). A communication bridge IC is a specialized interface component that converts between different communication protocols or physical layers. In a BMS hierarchy, the bridge sits between the host MCU and the battery stack monitors, converting MCU SPI/UART commands into the daisy-chain physical layer. This architecture reduces wiring, improves reliability, and supports functional-safety requirements up to ASIL-D. Key features include a dual SPI/UART host interface, automatic host wakeup via an integrated sniff detector that monitors the daisy chain for fault tones, and a VIO pin for level shifting to match the MCU I/O rail. AEC-Q100 automotive qualification and functional-safety compliance (ASIL-D per TI documentation) make the device suitable for harsh vehicle environments and safety-critical systems. Technically, the BQ79600-Q1 implements TI's daisy-chain protocol with fault-tone detection: when the device is in SHUTDOWN mode and a stack device reports a fault, the sniff detector validates the tone and wakes the host automatically via the INH pin, eliminating continuous polling in low-power standby. After wake-up, NFAULT reports active faults to the host controller. Typical applications include EV and HEV battery packs, 12V/48V battery management systems, and stationary energy storage systems using TI monitors such as the BQ79616-Q1 or BQ79731-Q1. The 16-pin TSSOP (PW) package fits space-constrained automotive designs. Design tip: connect VIO to the MCU I/O supply rail for correct logic levels, select SPI or UART mode per MCU capability, and follow TI's daisy-chain termination guidelines for signal integrity.