Texas Instruments BQ296230DSGT

Overview

BQ296230DSGT 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, 6.5s fixed delay timer, ±10mV OVP accuracy, 3.0V regulated output (2mA max), and active-high fault signaling. It serves as second-level protection in notebook PC battery management systems.

For engineers reviewing the BQ296230DSGT datasheet, BQ296230DSGT pinout, BQ296230DSGT application, or BQ296230DSGT equivalent, this page delivers verified specifications, validated pin functions, confirmed 8-pin WSON (2mm × 2mm) package mapping, real-world use cases in ultrabooks and medical backup systems, and two technically documented alternative options with explicit functional differences.

Technical Context

The BQ296230DSGT independently monitors each cell voltage (V1–VSS to V4–V3) against a factory-set 4.35V overvoltage threshold with 300mV hysteresis and ±10mV accuracy at 25°C. Upon detection, it initiates a fixed 6.5s internal delay before asserting the active-high OUT signal to trigger external FET-based fuse blow.

Its integrated 3.0V regulated supply delivers up to 2mA to always-on circuits (e.g., RTC), self-disables when any cell falls below the factory-configured 3.0V undervoltage threshold (with 6s disable delay and 300mV hysteresis), and draws only 1.2µA quiescent current when disabled.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ296230DSGT, BQ296221DSGT offers higher OVP tolerance and 3.3V output for logic compatibility, while BQ296213DSGT provides faster 3.0s fault response-both retain identical pinout and cell-sensing architecture but differ in timing and regulation voltage, requiring validation of delay margin and supply rail alignment in final design.

Availability

BQ296230DSGT is available at Aetrix Electronics and suitable for notebook PC battery packs, ultrabook power management systems, and medical portable device backup requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for BQ296230DSGT 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, embedded processing, and connectivity solutions with emphasis on reliability, precision, and power efficiency.

The BQ296xxx family is designed specifically for secondary overvoltage protection in multi-cell Li-ion battery packs, integrating precision voltage monitoring, programmable delay timers, and regulated auxiliary supplies to simplify safety-critical battery management.

FAQ

What is the exact overvoltage protection threshold and accuracy of the BQ296230DSGT?

The BQ296230DSGT has a factory-programmed overvoltage protection threshold of 4.35V with ±10mV accuracy at 25°C and ±54mV accuracy across –40°C to +110°C. This value is laser-trimmed during manufacturing and cannot be adjusted externally. The BQ296230DSGT maintains this specification without requiring calibration or external components, ensuring consistent secondary protection behavior across temperature and unit variance.

How does the regulated 3.0V output of the BQ296230DSGT behave under undervoltage conditions?

The BQ296230DSGT's 3.0V regulated output self-disables when any monitored cell voltage falls below its factory-configured 3.0V undervoltage threshold for 6 seconds. It re-enables only after all cell voltages rise above 3.0V + 300mV hysteresis. This behavior prevents battery deep discharge and protects downstream circuits like RTCs from brownout operation. The BQ296230DSGT implements this entirely in hardware, with no software dependency.

Is the BQ296230DSGT pin-compatible with other devices in the BQ2962 family?

Yes, the BQ296230DSGT shares identical 8-pin WSON (2mm × 2mm) packaging and pinout with all BQ2962 variants, including BQ296221DSGT and BQ296213DSGT. All share the same VDD, VSS, V1–V4, OUT, and REG pin assignments and electrical drive characteristics. This allows direct substitution within the same footprint when OVP threshold, delay time, or REG voltage align with system requirements.

What is the purpose of the PWPD pad on the BQ296230DSGT package?

The PWPD (Power Pad) on the BQ296230DSGT is an exposed thermal pad located on the underside of the 8-pin WSON package. Texas Instruments recommends connecting it directly to the VSS net on the PCB to improve thermal dissipation and electrical stability. It is not electrically isolated and must not be left floating; proper soldering and copper pour connection reduce junction-to-board thermal resistance to 10°C/W, supporting reliable operation at 110°C ambient.

Does the BQ296230DSGT support 2-cell, 3-cell, and 4-cell battery configurations?

Yes, the BQ296230DSGT supports 2-, 3-, and 4-series Li-ion configurations via its four independent cell sense inputs (V1–VSS, V2–V1, V3–V2, V4–V3). Unused higher-order pins (e.g., V4 in a 2-cell stack) are shorted to the adjacent lower pin (V3) as specified in TI's layout guidelines. The BQ296230DSGT automatically ignores differential voltages below 0.5V, enabling robust operation across all supported configurations without configuration registers or external switches.