Texas Instruments BQ294712DSGR

Overview

BQ294712DSGR from Texas Instruments is a factory-programmed, 4-cell Li-ion battery overvoltage protection IC with ±10 mV accuracy, 4.125 V OVP threshold, and external capacitor–programmed delay timer (1–2 s with 0.1 µF). It operates across –40°C to +110°C and delivers active-high CMOS output for fuse-control in high-reliability battery packs.

For engineers reviewing the BQ294712DSGR datasheet, BQ294712DSGR pinout, BQ294712DSGR application, or BQ294712DSGR equivalent, this page provides verified technical context, validated pin functions, confirmed 8-pin WSON package mapping, real-world timing behavior under OV fault, and two documented alternative part numbers with explicit functional and application-level differences.

Technical Context

The BQ294712DSGR independently monitors up to four series-connected Li-ion cells using analog sense inputs (V1–V4) referenced to VSS, with factory-trimmed 4.125 V overvoltage threshold and 300 mV hysteresis. Its delay timer is implemented via external CD pin capacitor charging/discharging with timeout detection for open/shorted capacitor fault coverage.

It features dual-mode output drive-CMOS active-high in this variant-with 4.5 mA source capability and sub-400 mV low-state voltage under load. Power consumption remains at ≈1 µA during normal operation (all cell voltages below VOV), and input leakage per cell sense pin is <100 nA.

Key Specifications

Pinout & Package

Package: 8-pin WSON (DSG), 2.00 mm × 2.00 mm, exposed thermal pad (PowerPAD™) requiring connection to VSS on PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ294701DSGR and BQ294713DSGR, the BQ294712DSGR offers the lowest factory-set OVP threshold (4.125 V) in the active-high CMOS family-making it optimal for early-fail-safe protection in standard NMC/NCA packs where tight voltage control prevents degradation.

Availability

BQ294712DSGR is available at Aetrix Electronics and suitable for UPS battery backup, notebook battery packs, and medical portable devices requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for BQ294712DSGR 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 delivering analog and embedded processing solutions, with leadership in battery management ICs and precision analog design.

The BQ2947 family is designed specifically for second-level overvoltage protection in multi-cell Li-ion battery packs, emphasizing accuracy, fault resilience, and integration into compact, high-reliability portable power systems.

FAQ

What is the factory-programmed overvoltage threshold for BQ294712DSGR?

The BQ294712DSGR has a factory-programmed overvoltage protection (OVP) threshold of 4.125 V, specified with ±10 mV accuracy at 25°C and ±54 mV drift over the full –40°C to +110°C operating range. This value is laser-trimmed during manufacturing and cannot be adjusted externally. The BQ294712DSGR is part of the BQ2947 family, which offers multiple fixed-threshold variants to match specific Li-ion chemistry requirements.

Does BQ294712DSGR support 2-cell, 3-cell, and 4-cell Li-ion configurations?

Yes, the BQ294712DSGR supports 2-series (2S), 3-series (3S), and 4-series (4S) Li-ion battery configurations. For 2S operation, V3 and V4 pins must be shorted to V2; for 3S, V4 is shorted to V3. All configurations use the same V1–VSS, V2–V1, V3–V2, and V4–V3 differential sensing architecture. The BQ294712DSGR maintains full accuracy and timing behavior regardless of stack size, as confirmed in TI's SLUSB15K datasheet Section 8.2.1.2.

What is the purpose of the CD pin on BQ294712DSGR, and what capacitor value is recommended?

The CD pin on BQ294712DSGR connects to an external capacitor that sets the overvoltage delay timer. With a 0.1 µF capacitor, the delay is 1–2 seconds, calculated as t_CD = K × C_CD, where K = 10–20. The CD pin also includes open/short fault detection: if the capacitor is missing or shorted, the BQ294712DSGR forces the OUT pin active within milliseconds. This dual function ensures robustness in safety-critical battery systems.

Is BQ294712DSGR compatible with open-drain active-low output configurations?

No, the BQ294712DSGR is configured exclusively for CMOS active-high output, as indicated by its part number suffix and confirmed in the Device Comparison Table (Section 4) of the datasheet. Open-drain active-low variants (e.g., BQ294707) have different part numbers and internal driver topology. Attempting to use BQ294712DSGR in an open-drain circuit will result in incorrect fault signaling due to its push-pull output stage.

What is the maximum operating temperature and thermal resistance for BQ294712DSGR?

The BQ294712DSGR is rated for operation from –40°C to +110°C ambient, with junction-to-board thermal resistance (R_θJB) of 32.5°C/W and junction-to-ambient (R_θJA) of 62°C/W in the 8-pin WSON package. These values assume proper PCB layout: the exposed PowerPAD™ must be soldered to a VSS copper plane with ≥4 thermal vias. The BQ294712DSGR meets these ratings without derating up to 110°C, as verified in Thermal Information (Section 6.4) of the official datasheet.