Texas Instruments BQ298015RUGT

Overview

BQ298015RUGT from Texas Instruments is a high-side single-cell Li-ion/Li-polymer battery protector IC with integrated charge-pump NFET drivers, ±10 mV overvoltage accuracy, 8 mV overcurrent detection (OCC/OCD), 20 µs short-circuit response, and 85°C internal overtemperature threshold. It enables ultra-low-R_DS(on) FET operation and supports 1 mΩ sense resistors for flash-charging smartphones and power banks.

For engineers reviewing the BQ298015RUGT datasheet, BQ298015RUGT pinout, BQ298015RUGT application, or BQ298015RUGT equivalent, key selection criteria include its factory-configured 4.440 V OVP/2.800 V UVP thresholds, CTR pin for host-controlled system reset or PTC-based secondary OT protection, and ZVCHG (0V charging) support exclusive to the BQ2980xx series.

Technical Context

The BQ298015RUGT implements high-side protection using an integrated charge pump to drive NFET gates at V_GS ≈ V_DD × A_FETON (1.45–1.81 V/V gain), reducing conduction loss across full cell voltage range. Its dual-path current sensing detects ±8 mV OCC/OCD faults with 8 ms delay and 20 µs SCD response via CS pin referenced to VSS.

It features configurable CTR logic: active-high override for <200 µs system reset or >5.4 s shutdown, or factory-enabled 1.5 MΩ pull-up for external PTC thermistor integration. Internal die temperature sensing triggers CHG/DSG shutdown after 4.5 s at 85°C with 15°C hysteresis.

Key Specifications

Pinout & Package

8-pin X2QFN package (1.50 mm × 1.50 mm × 0.37 mm) with wettable flanks and exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ298015RUGT, BQ298015RUGR offers identical performance in volume packaging, while BQ298215RUGT removes ZVCHG capability-making it unsuitable for devices needing 0V battery recovery but acceptable where full-charge-state operation is guaranteed.

Availability

BQ298015RUGT is available at Aetrix Electronics and suitable for smartphones, power banks, and wearables requiring stable component supply, long-term lifecycle support, and traceable sourcing for consumer electronics production.

Supply support for BQ298015RUGT 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 specializing in analog, embedded processing, and power management technologies with over 90 years of innovation history.

The BQ298xx family is designed specifically for high-efficiency, space-constrained single-cell Li-ion battery protection in portable electronics-emphasizing ultra-low power, precision voltage/current sensing, and flexible host control via the CTR pin.

FAQ

What is the overvoltage protection threshold of the BQ298015RUGT?

The BQ298015RUGT has a factory-configured overvoltage protection (OVP) threshold of 4.440 V with ±10 mV accuracy at 25°C. This value is laser-trimmed during manufacturing and cannot be adjusted externally. The device asserts OVP fault after a 1.25-second delay when BAT voltage exceeds this threshold, triggering CHG FET shutdown to protect the cell from overcharging during fast-charging cycles.

Does the BQ298015RUGT support zero-volt charging?

Yes, the BQ298015RUGT supports zero-volt (0V) charging via its ZVCHG function-a feature exclusive to the BQ2980xx series. When V_DD falls below 2.0 V and PACK+ voltage exceeds 2 V, the CHG pin is driven to follow PACK voltage instead of relying on the internal charge pump, enabling safe recharge of deeply depleted batteries down to 0 V.

How does the CTR pin function on the BQ298015RUGT?

The CTR pin on the BQ298015RUGT serves dual roles: as an active-high host control input for system reset (if held high <3.6 s) or shutdown (if held high >5.4 s), or-when factory-configured with internal pull-up-as a connection point for an external PTC thermistor to implement secondary overtemperature protection independent of the die sensor.

What is the current-sense accuracy of the BQ298015RUGT for overcurrent detection?

The BQ298015RUGT achieves ±1 mV accuracy for both overcurrent in charge (OCC) and overcurrent in discharge (OCD) detection at 25°C, degrading to ±3 mV across –40°C to +85°C. This enables reliable use of 1 mΩ sense resistors while maintaining tight trip margins-critical for high-current flash-charging applications where thermal management depends on precise current measurement.

What package type and dimensions does the BQ298015RUGT use?

The BQ298015RUGT uses an 8-pin X2QFN package with nominal dimensions of 1.50 mm × 1.50 mm × 0.37 mm and wettable flanks. This ultra-compact, leadless package supports fine-pitch routing and efficient thermal dissipation through its exposed thermal pad, making it ideal for thin-profile mobile devices where PCB real estate is severely constrained.