Texas Instruments BQ771612DPJR

Overview

BQ771612DPJR from Texas Instruments is a precision overvoltage protection IC for 2- to 4-series Li-ion battery packs, featuring ±10 mV OVP accuracy, 3.90 V fixed overvoltage threshold, 0.3 V hysteresis, external capacitor-programmed delay (1–2 s with 0.1 µF), and CMOS active-high output drive. It operates across –40°C to +110°C and supports eBike and power tool battery safety monitoring.

For engineers reviewing the BQ771612DPJR datasheet, BQ771612DPJR pinout, BQ771612DPJR application, or BQ771612DPJR equivalent, this page delivers verified specifications, validated pin functions, confirmed 8-pin WSON (3.00 mm × 4.00 mm) package mapping, real-world timing behavior under OV fault, and two technically documented alternative parts for cell-level protection designs.

Technical Context

The BQ771612DPJR independently monitors up to four cell voltages (V1–VSS through V4–V3) using high-accuracy analog comparators referenced to a stable internal bandgap. Upon detection of any cell exceeding 3.90 V, it initiates an external RC-based delay timer via the CD pin, with built-in open/short fault detection on the capacitor.

In NORMAL mode, supply current is ≈1 µA and per-cell input leakage remains <100 nA; in OVERVOLTAGE mode, the CMOS active-high OUT pin drives to ≥6 V (with 100 µA load) after delay expiration. The device supports Customer Test Mode with ≤170 ms response when CD is shorted to VSS.

Key Specifications

Pinout & Package

Package: 8-pin WSON (DPJ), 3.00 mm × 4.00 mm, exposed thermal pad, RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ771612DPJR, BQ771600DPJR and BQ771611DPJR share identical WSON-8 packaging, pinout, delay timer architecture, and fault reporting logic - differing only in factory-trimmed OVP thresholds to match distinct cell voltage envelopes.

Availability

BQ771612DPJR is available at Aetrix Electronics and suitable for power tools, eBike battery packs, and light electric vehicle systems requiring stable component supply, long-lifecycle support, and automotive-grade reliability validation.

Supply support for BQ771612DPJR 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 company specializing in analog and embedded processing technologies, with leadership in battery management, power conversion, and signal chain solutions.

The BQ7716xy family is designed specifically for standalone, hardware-based overvoltage protection in multi-cell Li-ion battery packs - prioritizing accuracy, fault resilience, and minimal external component count.

FAQ

What is the exact overvoltage protection threshold for BQ771612DPJR?

The BQ771612DPJR has a fixed overvoltage protection threshold of 3.90 V ±10 mV at 25°C, with ±44 mV total accuracy across –40°C to +110°C. This value is factory-trimmed and does not require external calibration. The BQ771612DPJR maintains this specification across its full operating temperature and supply voltage range (3 V to 20 V).

Does BQ771612DPJR support 2-cell, 3-cell, and 4-cell battery configurations?

Yes, the BQ771612DPJR supports 2-series, 3-series, and 4-series Li-ion battery configurations. Unused sense inputs (e.g., V4 in a 2S setup) must be shorted to the adjacent lower-potential pin per TI's layout guidance. All configurations use the same 8-pin WSON package and retain full OVP functionality on monitored cells.

How is the overvoltage delay time set on BQ771612DPJR?

The BQ771612DPJR uses an external capacitor on the CD pin to set the overvoltage delay time. With a 0.1 µF capacitor, the delay ranges from 1 s to 2 s. The relationship follows t_CD (s) = K × C_CD (µF), where K = 10–20. The BQ771612DPJR also detects open or shorted CD capacitors and triggers OUT accordingly.

What output drive type does BQ771612DPJR use?

The BQ771612DPJR features a CMOS active-high output driver on the OUT pin. When an overvoltage condition is detected and the delay expires, OUT drives high to ≥6 V (at 100 µA load). No external pull-up resistor is required. This differs from NCH open-drain variants like BQ771602DPJR.

Is BQ771612DPJR compatible with other members of the BQ7716xy family in terms of PCB layout?

Yes, all BQ7716xy variants - including BQ771612DPJR - share identical 8-pin WSON (DPJ) packaging, pinout, footprint, and thermal pad design. Layouts designed for one variant are mechanically and electrically compatible with others, enabling drop-in replacement based solely on OVP threshold selection.