Texas Instruments BQ296213DSGT

Overview

BQ296213DSGT from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.35V OVP threshold, 3-second fixed delay timer, ±10mV OVP accuracy, active-high OUT signal, and 3.3V regulated output supply delivering up to 2mA. It is used in notebook PC battery protection circuits to trigger fuse-blowing FETs upon cell overvoltage.

For engineers reviewing the BQ296213DSGT datasheet, BQ296213DSGT pinout, BQ296213DSGT application, or BQ296213DSGT equivalent, this page delivers verified technical context, real-world timing behavior, regulator self-disable logic, and precise pin-level design meaning - all confirmed from TI's official SLUSBU5V datasheet (Sep 2025 revision).

Technical Context

The BQ296213DSGT operates as a second-level overvoltage protector that independently monitors each cell voltage (V1–VSS through V4–V3) against a factory-set 4.35V threshold with 300mV hysteresis and ±10mV accuracy at 25°C. Upon detection, it initiates a fixed 3-second internal delay before asserting the CMOS-active-high OUT signal to drive an external NMOS FET.

Its integrated 3.3V regulated supply (REG) delivers up to 2mA with ±0.066V load regulation (0–2mA), self-disables when any cell falls below 2.5V (VUVREG), and includes short-circuit current limiting (4mA) and thermal-safe pull-down (20–45kΩ) when disabled. Supply current is 4µA (REG on) or 1.2µA (REG off) under normal operation.

Key Specifications

Pinout & Package

Package: 8-pin WSON (2.00mm × 2.00mm), exposed thermal pad (PWPD) recommended to be connected to VSS on PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ296213DSGT, BQ296212DSGT raises OVP sensitivity (4.50V vs. 4.35V) for tighter margin control, while BQ296233DSGT trades faster response (3s) for enhanced noise immunity (6.5s), making selection dependent on charge algorithm and environmental stress profile.

Availability

BQ296213DSGT is available at Aetrix Electronics and suitable for notebook PC battery management, medical portable device backup, and UPS battery module designs requiring stable component supply across long production lifecycles.

Supply support for BQ296213DSGT 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 and embedded processing technologies, with decades of leadership in battery management ICs.

The BQ296xxx product line is designed specifically for high-accuracy, ultra-low-power secondary overvoltage protection in multi-cell Li-ion battery packs - targeting applications where precision, reliability, and minimal standby current are critical.

FAQ

What is the exact overvoltage threshold and delay time configured in BQ296213DSGT?

The BQ296213DSGT has a factory-programmed overvoltage threshold of 4.35V with ±10mV accuracy at 25°C and a fixed 3.0-second delay timer before the OUT pin asserts high. These values are laser-trimmed during manufacturing and cannot be modified in the field. The 3s delay is specified as 2.4–3.6s across temperature and process variation, ensuring robust rejection of transient spikes while maintaining timely fault response.

How does the BQ296213DSGT regulate its 3.3V output and what load can it drive?

The BQ296213DSGT provides a regulated 3.3V output (REG pin) with ±0.066V accuracy from 0–2mA load, requiring a minimum 0.47µF ceramic capacitor to VSS for stability. It delivers up to 2mA continuously and includes short-circuit current limiting at 4mA. The output self-disables when any monitored cell voltage falls below 2.5V (VUVREG), preventing battery drain during deep discharge - a key feature for long-term storage in smart battery packs.

What is the correct power-up sequence for BQ296213DSGT to avoid damage?

VSS must be connected before any other pin - especially before applying voltage to VDD or connecting cell sense lines - to prevent damaging the REG pin during initial capacitor charging. If VSS cannot be connected first, a 5Ω resistor must be placed in series with the REG capacitor to limit inrush current. This requirement is explicitly documented in TI's SLUSBU5V datasheet Section 8.2.2 and applies universally to all BQ2962xx variants, including BQ296213DSGT.

Can BQ296213DSGT be used in 2-cell or 3-cell battery configurations?

Yes - BQ296213DSGT supports 2-, 3-, and 4-series Li-ion configurations. For 2-cell use, V3 and V4 pins are shorted to V2; for 3-cell, V4 is shorted to V3. All unused Vx pins must be tied to the adjacent lower-sense node to maintain proper biasing and avoid floating inputs. The device automatically ignores differential voltages below 0.5V (VUVQUAL) during undervoltage detection, ensuring reliable operation regardless of stack size.

What failure modes does BQ296213DSGT protect against beyond overvoltage?

Beyond overvoltage, BQ296213DSGT provides undervoltage detection (2.5V threshold with 300mV hysteresis and 6s delay), REG output short-circuit protection (4mA limit), and thermal-safe REG pull-down (20–45kΩ) when disabled. It also supports Customer Test Mode (CTM) for accelerated OVP delay validation during production testing. These features collectively guard against cell imbalance, deep discharge, external load faults, and manufacturing test errors - all confirmed in the BQ296213DSGT's electrical characteristics table (Section 6.5).