Texas Instruments BQ296114DSGR

Overview

BQ296114DSGR from Texas Instruments is a high-accuracy, low-power overvoltage protection IC for 2–4 series Li-ion battery packs, featuring factory-programmed 4.50 V OVP threshold, 4-second fixed delay timer, ±10 mV OVP accuracy, active-high OUT signal, and 3.3 V regulated supply output delivering up to 2 mA. It serves as second-level cell voltage monitor and fault signal generator in notebook PC battery management systems.

For engineers reviewing the BQ296114DSGR datasheet, BQ296114DSGR pinout, BQ296114DSGR application, or BQ296114DSGR equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, confirmed alternative options, and supply support details specific to this exact variant.

Technical Context

The BQ296114DSGR independently monitors each cell voltage (V1–VSS through V4–V3) against a factory-set 4.50 V overvoltage threshold with 300 mV hysteresis and ±10 mV accuracy at 25°C. Upon detection, it initiates a precise 4-second internal delay before asserting the CMOS-active-high OUT signal to trigger external FETs for fuse blow.

Its integrated 3.3 V regulator supplies up to 2 mA to always-on circuits (e.g., RTC), self-disables when any cell drops below 2.5 V (factory-configured UV threshold), and draws only 4 µA quiescent current with REG enabled - dropping to 1.2 µA when disabled.

Key Specifications

Pinout & Package

Package: 8-pin WSON (2.00 mm × 2.00 mm), thermally enhanced with exposed pad connected to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ296114DSGR, BQ296112DSGR offers faster fault response (3 s vs. 4 s) at identical OVP/UV thresholds, while BQ296113DSGR matches all key parameters exactly - making it a functionally identical alternate sourcing option for supply chain continuity.

Availability

BQ296114DSGR is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management subsystems, and medical portable device designs requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for BQ296114DSGR 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 precision analog ICs.

The BQ296xxx family was designed specifically for second-level overvoltage protection and regulated auxiliary supply in multi-cell Li-ion battery packs - targeting high-reliability portable computing and medical applications.

FAQ

What is the factory-programmed overvoltage threshold for BQ296114DSGR?

The BQ296114DSGR has a factory-programmed overvoltage threshold of 4.50 V with ±10 mV accuracy at 25°C and ±54 mV accuracy across –40°C to +110°C. This value is laser-trimmed during manufacturing and cannot be adjusted externally. The BQ296114DSGR is part of the BQ2961 series, which supports OVP thresholds from 3.85 V to 4.60 V in 50 mV increments - and 4.50 V is the exact setting for this specific orderable part number.

Does BQ296114DSGR support 2-series, 3-series, and 4-series battery configurations?

Yes, BQ296114DSGR supports 2S, 3S, and 4S Li-ion battery stacks via its four independent cell-sense inputs (V1–VSS, V2–V1, V3–V2, V4–V3). Unused sense pins must be shorted to the adjacent lower pin (e.g., V4 to V3 in 3S config); the device automatically ignores differential voltages below 0.5 V for undervoltage qualification. All supported configurations use the same 4.50 V OVP threshold and 4-second delay programmed into the BQ296114DSGR.

What is the purpose and behavior of the REG pin on BQ296114DSGR?

The REG pin on BQ296114DSGR delivers a factory-programmed 3.3 V regulated output capable of supplying up to 2 mA to external circuits like RTCs or supervisors. It self-disables when any monitored cell voltage falls below the 2.5 V undervoltage threshold for 6 seconds, then re-enables only after all cells exceed 2.55 V (2.5 V + 50 mV hysteresis). The BQ296114DSGR requires a 0.47 µF ceramic capacitor placed directly between REG and VSS for stability.

How does the OUT pin function on BQ296114DSGR during an overvoltage event?

The OUT pin on BQ296114DSGR is a CMOS active-high output that remains low during normal operation. When any cell exceeds 4.50 V, a 4-second internal timer starts; upon expiration, OUT transitions high and holds until all cell voltages fall below 4.20 V (4.50 V – 300 mV hysteresis). This signal typically drives an NMOS FET gate to short the fuse to ground, using battery or charger current to blow the fuse - a hardware-based fail-safe action independent of firmware.

What package type and footprint does BQ296114DSGR use?

BQ296114DSGR uses an 8-pin WSON package with a 2.00 mm × 2.00 mm body size and an exposed thermal pad. The pinout is standardized across the BQ2961/BQ2962 family: VDD (Pin 1), V4 (Pin 2), V3 (Pin 3), V2 (Pin 4), V1 (Pin 5), VSS (Pin 6), REG (Pin 7), and OUT (Pin 8). TI recommends connecting the exposed pad to VSS on the PCB for optimal thermal performance and ESD robustness.