Texas Instruments BQ771807DPJR

Overview

BQ771807DPJR from Texas Instruments is a dedicated overvoltage protection IC for 2- to 5-series Li-ion battery packs, featuring ±10 mV OVP accuracy, 4.450 V fixed overvoltage threshold, 3 s internal delay timer, and CMOS active-high output drive. It operates across –40°C to 110°C and supports handheld power tools requiring precise cell-level fault detection.

For engineers reviewing the BQ771807DPJR datasheet, BQ771807DPJR pinout, BQ771807DPJR application, or BQ771807DPJR equivalent, key selection criteria include OVP threshold tolerance, delay timing consistency, leakage current per cell input (<100 nA), supply current (≈1 µA), and functional safety documentation support.

Technical Context

The BQ771807DPJR independently monitors up to five differential cell voltages (V1–VSS through V5–V4) using internal precision references. Its overvoltage detection triggers a fixed 3 s delay timer before asserting the CMOS active-high OUT signal.

It integrates no external timing components-delay is fully internal-and supports Customer Test Mode (CTM) with reduced ~15 ms fault detection time for production-line validation. The device requires RC filtering on all Vx inputs and uses VDD as unregulated supply (3 V to 25 V).

Key Specifications

Pinout & Package

Package: 8-pin WSON (DPJ), 3.00 mm × 4.00 mm, wettable flank, RoHS-compliant, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar overvoltage protection applications.

Compared with BQ771807DPJR, BQ771806DPJR offers lower OVP setpoint for conservative protection of aged cells, while BQ771818DPJR trades delay time for faster reaction-both retain identical pinout, package, and functional safety documentation support.

Availability

BQ771807DPJR is available at Aetrix Electronics and suitable for handheld power tools, cordless vacuum cleaners, and light electric vehicles requiring stable component supply with full traceability and lifecycle management.

Supply support for BQ771807DPJR 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 delivering analog and embedded processing solutions, with deep expertise in battery management and functional safety architectures.

The BQ7718 family is designed specifically for standalone overvoltage protection in multi-cell Li-ion battery packs, emphasizing accuracy, low power, and production-test efficiency via Customer Test Mode.

FAQ

What is the overvoltage protection threshold and accuracy of the BQ771807DPJR?

The BQ771807DPJR has a fixed overvoltage protection threshold of 4.450 V with ±10 mV accuracy at 25°C and ±54 mV maximum drift across –40°C to 110°C. This specification ensures reliable detection of overcharged cells in high-energy NMC Li-ion configurations without external calibration components. The BQ771807DPJR achieves this using trimmed internal references and matched comparator circuitry.

Does the BQ771807DPJR require external timing components for its overvoltage delay?

No, the BQ771807DPJR implements a fully internal 3 s delay timer-no external capacitors or resistors are needed. This eliminates timing component variation and temperature drift, improving long-term reliability in consumer and industrial battery packs. The BQ771807DPJR also supports Customer Test Mode with ~15 ms delay for accelerated production-line verification.

How does the BQ771807DPJR interface with the host system's fault management logic?

The BQ771807DPJR features a CMOS active-high OUT pin that drives to VDD – 0.3 V (min) when an overvoltage condition is confirmed after the 3 s delay. This signal can directly drive an MCU interrupt pin, enable/disable a charge FET driver, or feed into an optocoupler isolation stage. The BQ771807DPJR requires no pull-up or pull-down resistors on OUT due to its push-pull output structure.

What is the operating temperature range and supply voltage capability of the BQ771807DPJR?

The BQ771807DPJR operates from –40°C to 110°C ambient and accepts a supply voltage (VDD) from 3 V to 25 V. Its design supports direct connection to the battery stack's high-side rail in 2- to 5-series configurations. The BQ771807DPJR maintains specified OVP accuracy and leakage performance across this full range, validated per JEDEC JESD22-A108.

Is functional safety documentation available for the BQ771807DPJR?

Yes, Texas Instruments provides functional safety documentation for the BQ771807DPJR, including FIT rate calculation, failure mode effects analysis (FMEA), and diagnostic coverage guidance aligned with ISO 26262 ASIL-B and IEC 61508 SIL2 requirements. This documentation is publicly accessible via TI's BQ7718 product folder and supports safety-critical battery system certification workflows. The BQ771807DPJR itself contains no configurable safety mechanisms-it delivers deterministic, single-fault-tolerant OVP behavior.