Texas Instruments BQ29723DSET

Overview

BQ29723DSET from Texas Instruments is a single-cell Li-ion/Li-polymer battery protection IC that provides overvoltage (4.425 V), undervoltage (2.500 V), charge/discharge overcurrent (–0.060 V / 0.100 V), and short-circuit (0.3 V) detection with factory-programmed thresholds, 1 µA shutdown current, and 6-pin WSON (1.50 mm × 1.50 mm) packaging for space-constrained portable power systems.

For engineers reviewing the BQ29723DSET datasheet, BQ29723DSET pinout, BQ29723DSET application, or BQ29723DSET equivalent, this device supports precise cell-level fault monitoring in mobile handsets, tablets, and handheld data terminals where ultra-low quiescent current, ±5 mV OCP sensing accuracy, and zero-voltage charging capability are critical for safety and runtime optimization.

Technical Context

The BQ29723DSET implements dual FET gate drive outputs (COUT for charge control, DOUT for discharge control) referenced to BAT and VSS respectively, enabling direct NMOS FET switching without external level shifters. Its differential voltage sensing across V– and VSS/VBAT enables ±5 mV typical accuracy for OCD/OCC/SCP detection independent of sense resistor tolerance.

Operating modes include NORMAL (4 µA ICC) and Shutdown (100 nA IQ), with all fault thresholds and delay timers (e.g., tOVPD = 1 s, tUVPD = 96 ms, tOCDD = 8 ms, tSCCD = 250 µs) factory-programmed and non-volatile. Zero-voltage charging initiates when BAT ≥ 1.7 V, supporting recovery of deeply depleted cells.

Key Specifications

Pinout & Package

Package: 6-pin WSON (DSE), 1.50 mm × 1.50 mm × 0.75 mm body size, wettable flank terminations, thermal pad exposed on bottom.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ29723DSET, BQ29728DSET offers higher undervoltage protection and longer delay for robustness in cyclic use, while BQ29733DSET trades slightly lower OVP for faster UVP response-making BQ29723DSET optimal for balanced performance in mainstream portable electronics.

Availability

BQ29723DSET is available at Aetrix Electronics and suitable for mobile handsets, tablet PCs, and handheld data terminals requiring stable component supply, long-term lifecycle support, and consistent factory-programmed protection parameters.

Supply support for BQ29723DSET 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 power management, signal chain, and battery solutions.

The BQ297xx family is designed specifically for cost-effective, highly integrated single-cell Li-ion/Li-polymer battery protection in space- and power-constrained portable electronics.

FAQ

What protection functions does the BQ29723DSET provide?

The BQ29723DSET provides overcharge protection (OVP = 4.425 V), over-discharge protection (UVP = 2.500 V), charge overcurrent protection (OCC = –0.060 V), discharge overcurrent protection (OCD = 0.100 V), and load short-circuit protection (SCD = 0.3 V). All thresholds and associated delay timers-including tOVPD = 1 s, tUVPD = 96 ms, tOCDD = 8 ms, and tSCCD = 250 µs-are factory-programmed and non-volatile. The BQ29723DSET executes these protections autonomously without host processor involvement.

How does the BQ29723DSET support zero-voltage charging?

The BQ29723DSET enables zero-voltage charging when the BAT-to-V– voltage reaches ≥1.7 V, allowing safe reactivation of deeply depleted Li-ion cells. Below 0.75 V (V0INH threshold), charging is inhibited to prevent unsafe plating. This function operates independently of external controllers and is implemented using internal comparators and hysteresis. The BQ29723DSET's zero-voltage charging capability ensures field-deployed devices can recover from full discharge without manual intervention.

What is the package type and pin configuration of the BQ29723DSET?

The BQ29723DSET uses a 6-pin WSON (DSE) package measuring 1.50 mm × 1.50 mm × 0.75 mm with an exposed thermal pad. Pin 1 is NC (no connection), Pin 2 is COUT (charge FET gate drive), Pin 3 is DOUT (discharge FET gate drive), Pin 4 is VSS (ground reference), Pin 5 is BAT (battery positive supply), and Pin 6 is V– (negative sense input). The BQ29723DSET requires no external passive components for basic protection functionality, simplifying layout and reducing BOM count.

What are the key power consumption characteristics of the BQ29723DSET?

The BQ29723DSET draws 4 µA in NORMAL mode and only 100 nA in Shutdown mode, enabling multi-year battery shelf life and minimal self-discharge during storage. These values are specified across –40°C to +85°C and are validated under defined test conditions (e.g., IBNORMAL measured at BAT = 3.8 V, V– = 0 V). The BQ29723DSET achieves ultra-low power via optimized internal oscillator and sleep-state circuitry, making it ideal for always-on portable devices where energy efficiency is critical.

How does the BQ29723DSET detect overcurrent conditions?

The BQ29723DSET detects overcurrent by measuring differential voltage across external sense paths: OCD is sensed between V– and VSS (0.100 V threshold), OCC between VSS and V– (–0.060 V threshold), and SCD between V– and VSS (0.3 V threshold). Voltage sensing accuracy is ±5 mV typical, independent of external resistor tolerance. The BQ29723DSET uses dedicated internal comparators and fixed delay timers (e.g., 8 ms for OCD) to trigger COUT or DOUT gate drive transitions, ensuring repeatable, low-drift protection behavior across temperature and lifetime.