Texas Instruments BQ296216DSGR

Overview

BQ296216DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protector IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.55V OVP threshold, 6.5s fixed delay timer, active-high CMOS OUT signal, ±10mV OVP accuracy, and 3.0V regulated output supply delivering up to 2mA. It serves as second-level protection in notebook PC and medical battery management systems.

For engineers reviewing the BQ296216DSGR datasheet, BQ296216DSGR pinout, BQ296216DSGR application, or BQ296216DSGR equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, application-specific implementation insights, and confirmed alternative options for battery pack overvoltage protection with regulated supply.

Technical Context

The BQ296216DSGR independently monitors each cell voltage (V1–VSS, V2–V1, V3–V2, V4–V3) against a factory-set 4.55V overvoltage threshold with ±10mV accuracy at 25°C and 300–400mV hysteresis. Upon detection, it triggers a fixed 6.5s internal delay before asserting the active-high OUT signal to drive an external NMOS FET for fuse blow control.

Its integrated 3.0V regulated supply (REG) delivers up to 2mA with self-disable logic: REG shuts down when any cell voltage falls below the factory-configured 2.5V undervoltage threshold for ≥6s, preventing battery drain. Supply current is 4µA (REG on) or 1.2µA (REG off), with per-cell input leakage <100nA.

Key Specifications

Pinout & Package

8-pin WSON package (2.00mm × 2.00mm) with exposed thermal pad connected to VSS. Pin 1 is top-left corner (VDD), pin numbering proceeds counterclockwise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ296216DSGR, BQ296221DSGR offers higher regulated voltage (3.3V) at the cost of compatibility with 3.0V-dependent peripherals, while BQ296215DSGR lowers OVP to 4.50V for enhanced safety margin but reduces usable cell voltage range.

Availability

BQ296216DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, medical portable devices, and UPS battery backup systems requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for BQ296216DSGR 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 ICs and precision analog solutions.

The BQ296xxx product line is designed specifically for second-level overvoltage protection in multi-cell Li-ion battery packs, integrating accurate cell monitoring, programmable timing, and regulated auxiliary supply in ultra-small packages.

FAQ

What is the factory-programmed overvoltage threshold for BQ296216DSGR?

The BQ296216DSGR has a factory-programmed overvoltage protection (OVP) threshold of 4.55V with ±10mV accuracy at 25°C. This value is laser-trimmed during manufacturing and cannot be adjusted externally. The device uses this fixed threshold to monitor each cell voltage (V1–VSS, V2–V1, etc.) and initiate the 6.5s delay timer upon detection. BQ296216DSGR's OVP accuracy remains within ±54mV across the full –40°C to +110°C operating range.

Does BQ296216DSGR support 2-series and 3-series battery configurations?

Yes, BQ296216DSGR supports 2-series, 3-series, and 4-series Li-ion battery stacks. For 2-series use, V3 and V4 pins are shorted to V2 and V3 respectively; for 3-series, V4 is shorted to V3. All configurations retain the same 4.55V OVP threshold, 6.5s delay, and 3.0V REG output. The device ignores voltages below 0.5V on unused sense inputs, ensuring robust operation regardless of stack size. BQ296216DSGR's pinout and internal logic are fully compatible across all three configurations.

What is the purpose and behavior of the REG pin on BQ296216DSGR?

The REG pin on BQ296216DSGR provides a factory-programmed 3.0V regulated output capable of sourcing up to 2mA. It powers always-on circuits such as real-time clocks or supervisor ICs. BQ296216DSGR automatically disables REG when any monitored cell voltage falls below 2.5V for ≥6 seconds, preventing battery drain during deep discharge. A 0.47µF ceramic capacitor must be placed between REG and VSS for stability. BQ296216DSGR's REG output maintains ±30mV regulation across load (0–2mA) and temperature (–40°C to +110°C).

How does the OUT pin function during overvoltage detection in BQ296216DSGR?

The OUT pin on BQ296216DSGR is a CMOS active-high output that transitions from low to high after a fixed 6.5s delay following detection of any cell voltage exceeding 4.55V. It sources up to 4.5mA and is intended to drive the gate of an external NMOS FET, creating a low-impedance path to ground for the fuse. BQ296216DSGR holds OUT high until all cell voltages fall below (4.55V – 300mV) hysteresis. The pin remains functional even if three cells are shorted, as long as one cell exceeds OVP.

What are the absolute maximum ratings for BQ296216DSGR's supply and sense pins?

BQ296216DSGR has an absolute maximum VDD–VSS rating of 30V and maximum differential voltage across any two adjacent sense pins (e.g., V2–V1, V1–VSS) of 30V. The REG pin tolerates –0.3V to 3.6V relative to VSS. Exceeding these limits risks permanent damage. Recommended operating conditions specify VDD = 3–20V, sense voltage differentials = 0–5V, and ambient temperature = –40°C to +110°C. BQ296216DSGR's ESD rating is 2000V HBM and 500V CDM, per JEDEC standards.