Texas Instruments BQ7695203PFBR

Overview

BQ7695203PFBR from Texas Instruments is a high-accuracy, 3- to 16-series Li-ion/LiFePO₄ battery monitor and protector IC with integrated high-side charge-pump NFET drivers, dual programmable LDOs (REG1 set to 5 V, REG2 configurable), and SPI interface. It delivers <10 mV typical cell voltage measurement accuracy, <1 µV typical input offset for coulomb counting, and supports ±200-mV current-sense range across external shunt resistors - deployed in e-bike battery packs requiring autonomous protection and host-controlled balancing.

For engineers reviewing the BQ7695203PFBR datasheet, BQ7695203PFBR pinout, BQ7695203PFBR application, or BQ7695203PFBR equivalent, key selection criteria include its 48-pin TQFP (PFB) package, CRC-enabled SPI communication, 9 µA DEEPSLEEP current, 85-V cell-stack tolerance, and OTP-programmable configuration for production-line customization.

Technical Context

The BQ7695203PFBR implements two independent ADCs for simultaneous high-accuracy voltage and current sampling, enabling synchronized coulomb counting and cell voltage monitoring. Its protection subsystem includes comparator-based overvoltage, undervoltage, overtemperature, and overcurrent detection with autonomous recovery logic for PCHG/PDSG FETs.

It integrates a charge pump for high-side NFET gate drive up to 85 V, supports random cell-attach sequencing during manufacturing, and features multifunction pins (e.g., CFETOFF/DFETOFF/HDQ) that serve as thermistor inputs, ADC channels, or digital I/O - all configurable via OTP or runtime registers without requiring external components.

Key Specifications

Pinout & Package

48-pin TQFP (PFB) package, 7 mm × 7 mm body size, exposed thermal pad (not electrically connected), RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ7695203PFBR, BQ7695202PFBR trades SPI for I²C and shifts REG1 to 3.3 V, while BQ7695204PFBR retains identical SPI/CRC functionality but delivers 3.3 V instead of 5 V from REG1 - making BQ7695203PFBR optimal for 5-V peripheral interfacing in high-reliability LEV and tool applications.

Availability

BQ7695203PFBR is available at Aetrix Electronics and suitable for e-bike battery packs, cordless power tools, and non-military drone systems requiring stable component supply, long-term lifecycle support, and production-ready BMS integration.

Supply support for BQ7695203PFBR 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 decades of experience in battery management solutions.

The BQ76952 family targets high-accuracy, high-voltage battery packs for industrial and mobility applications - designed to replace discrete protection ICs and reduce BOM count while meeting stringent safety and longevity requirements.

FAQ

What is the primary function of the BQ7695203PFBR in a battery pack?

The BQ7695203PFBR serves as a high-accuracy battery monitor and protector for 3- to 16-series Li-ion, Li-polymer, and LiFePO₄ cells. It performs real-time cell voltage and current measurement, executes autonomous or host-controlled cell balancing, drives external protection FETs, and enforces voltage, temperature, and current-based safety limits - all within a single 48-pin TQFP package. The BQ7695203PFBR integrates dual ADCs, programmable LDOs, and CRC-enabled SPI for robust system-level BMS implementation.

How does the BQ7695203PFBR handle high-voltage battery stacks?

The BQ7695203PFBR supports up to 85 V on its VC0–VC16, PACK, and LD pins, enabling direct monitoring of 16S LiFePO₄ (≈57.6 V) or 14S Li-ion (≈58.8 V) packs without external level shifters. Its high-side charge-pump drivers allow NMOS/PMOS FET control across the full stack voltage range. The BQ7695203PFBR also tolerates random cell attachment sequences during manufacturing - simplifying high-voltage pack assembly and improving yield.

What communication interface does the BQ7695203PFBR use, and why is it significant?

The BQ7695203PFBR uses a CRC-enabled SPI interface operating at standard speeds, mapped to HDQ, SDA, SCL, and CFETOFF pins. This provides noise-immune, high-speed host communication ideal for industrial and mobility applications where electromagnetic interference is common. Unlike I²C variants in the same family, the BQ7695203PFBR's SPI interface avoids bus contention and supports deterministic timing - critical for time-sensitive protection responses. The BQ7695203PFBR's CRC feature ensures data integrity during configuration and telemetry reads.

Can the BQ7695203PFBR perform cell balancing autonomously?

Yes, the BQ7695203PFBR supports both autonomous and host-controlled cell balancing. Autonomous balancing activates based on user-configured voltage thresholds and timers stored in OTP or volatile registers, driving up to 100 mA per cell through dedicated VCx pins. This reduces host MCU overhead and ensures consistent balancing even during communication outages. The BQ7695203PFBR's balancing algorithm includes thermal derating and duty-cycle limiting to prevent localized heating - a key reliability feature validated in TI's production data for the BQ7695203PFBR.

What power modes does the BQ7695203PFBR support, and how do they impact system design?

The BQ7695203PFBR offers four low-power modes: NORMAL (286 µA), multiple SLEEP options (24–41 µA), multiple DEEPSLEEP options (9–10 µA), and SHUTDOWN (1 µA). These modes allow system designers to optimize energy consumption based on operational state - for example, using DEEPSLEEP during vehicle storage to minimize self-discharge, or transitioning to SLEEP during periodic telemetry uploads. The BQ7695203PFBR's wake sources include TS2 thermistor events, LD pin transitions, and ALERT assertions - enabling responsive yet ultra-low-power operation essential for portable and remote applications.