Texas Instruments BQ7692003PW

Overview

BQ7692003PW from Texas Instruments is a 3- to 5-series Li-ion/LiFePO₄ battery monitor AFE with integrated charge/discharge FET drivers, 14-bit cell voltage ADC (±10 mV accuracy at 25°C), coulomb-counting current measurement, and hardware overvoltage/undervoltage/overcurrent protection. It supports e-bike battery packs up to 18 V and delivers 2.5-V LDO output with CRC-enabled I²C interface.

For engineers reviewing the BQ7692003PW datasheet, BQ7692003PW pinout, BQ7692003PW application, or BQ7692003PW equivalent, key selection criteria include its 20-pin TSSOP package, 5-cell sensing capability, 70-mA internal cell balancing current, ultra-low 40–195 µA operating supply current, and random cell connection tolerance for simplified pack assembly.

Technical Context

The BQ7692003PW implements a dedicated analog front-end architecture with two independent ADC subsystems: one 14-bit SAR ADC for cell voltage and die/thermistor temperature sensing (250-ms update interval), and a separate 16-bit delta-sigma coulomb counter for pack current (±200 mV input range, ±2 LSB INL). Its protection logic executes in hardware without host intervention, supporting configurable OV/UV trip points (16-LSB step), OCD/SCD thresholds (8–100 mV and 22–200 mV respectively), and programmable delay timers.

Power management includes three operational modes-NORMAL (ADC/CC on/off combinations), SHIP (0.6–1.8 µA), and BOOT-with POR threshold at 4–5 V and shutdown at 3.6 V. The device uses VC0–VC5 differential inputs for 5-series monitoring, SRP/SRN for bidirectional current sensing, and supports up to three thermistors via TS1–TS3 pins with internal 10-kΩ pull-up bias.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW), 6.50 mm × 4.40 mm × 1.20 mm body size, lead pitch 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery monitor AFE applications.

Compared with BQ7692000PW and BQ7692002PW, the BQ7692003PW uniquely combines CRC-enabled I²C communication with a 2.5-V LDO-making it optimal for noise-sensitive industrial hosts and mixed-voltage systems requiring both robust data transfer and precise low-voltage rail generation.

Availability

BQ7692003PW is available at Aetrix Electronics and suitable for e-bike battery packs, power tool modules, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.

Supply support for BQ7692003PW includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in precision analog ICs.

The BQ769x0 product line was engineered specifically for high-reliability, high-cell-count battery monitoring in light electric vehicles and industrial energy storage-emphasizing hardware autonomy, ultra-low power, and field-proven fault resilience.

FAQ

What is the maximum number of series cells supported by the BQ7692003PW?

The BQ7692003PW supports up to 5-series lithium-based cells (Li-ion or LiFePO₄), corresponding to nominal pack voltages up to 18 V. This is fixed by its internal analog front-end architecture and VC0–VC5 pin configuration. It cannot monitor 6+ cells-those require BQ76930 or BQ76940 variants. The BQ7692003PW datasheet explicitly defines its cell range as 3–5 series, and its pinout lacks VC6+ inputs.

Does the BQ7692003PW include an integrated LDO regulator, and what is its output voltage?

Yes, the BQ7692003PW integrates a linear regulator with a fixed 2.5-V output (REGOUT), powered from the REGSRC input (6–25 V range). This LDO supplies clean power to external microcontrollers or sensors and is factory-configured-no external resistors or programming are needed. The BQ7692003PW differs from BQ7692002PW (3.3 V) and BQ7692000PW (2.5 V, no CRC), confirming its 2.5-V LDO is part of its specific variant identity.

How does the BQ7692003PW handle overcurrent protection, and what are its response time characteristics?

The BQ7692003PW implements hardware-based overcurrent protection (OCD) with user-selectable thresholds (8–100 mV across SRP–SRN) and delay options from 8 ms to 1280 ms. Short-circuit detection (SCD) responds in 35–520 µs depending on configuration. These protections operate autonomously without host intervention, ensuring deterministic response even if the MCU is unresponsive. The BQ7692003PW's OCD offset is ±2.5 mV and scale error ±10%, verified across –40°C to +85°C.

Is the BQ7692003PW pin-compatible with other members of the BQ769x0 family, such as the BQ76930 or BQ76940?

No, the BQ7692003PW is not pin-compatible with BQ76930 or BQ76940. It uses a 20-pin TSSOP (PW) package with VC0–VC5 inputs, whereas BQ76930 uses a 30-pin TSSOP (DBT) with VC0–VC10, and BQ76940 uses a 44-pin TSSOP (DBT) with VC0–VC15. Pin counts, functions, and physical dimensions differ significantly-direct replacement would require PCB redesign. The BQ7692003PW shares only functional similarity, not mechanical or electrical compatibility.

What thermistor types and configurations does the BQ7692003PW support?

The BQ7692003PW supports one external 10-kΩ NTC thermistor (103AT type) connected to TS1, with internal 10-kΩ pull-up biasing. If unused, TS1 must be pulled down to VSS with a 10-kΩ resistor. Unlike BQ76930/BQ76940, the BQ7692003PW has no TS2 or TS3 pins-only single-point thermal monitoring is implemented. Its thermistor measurement resolution and accuracy are specified in the datasheet's ADC section, with 0.3–3 V valid input range.