Texas Instruments‘ BQ25180 is a linear battery charger IC focused on small solution size and low quiescent current to extend battery life. The device is housed in an 8-bump chip-scale package, eliminating the need for an HDI PCB process for fabrication, reducing PCB costs. The device can support charge currents up to 1A and system loads up to 2.5A.

Texas Instruments‘ linear battery charger IC, the BQ25180, uses a standard Li-Ion or LiFePO4 charging profile to charge batteries in three stages: precharge, constant current, and constant voltage. Provides maximum charge current through thermal regulation while managing device temperature. The charger is also optimized for inter-battery charging, has a minimum input voltage of 3V, and can withstand an absolute maximum line transient of 25V. The device integrates a single button input and reset circuitry to reduce the overall solution size.

Features of Texas Instruments‘ Linear Battery Charger IC BQ25180:

1. 1A power path linear battery charger

3.0V to 5.9V Input Voltage Operating Range Optimized for Inter-Battery Charging and USB Adapters

25V input voltage tolerant

Configurable battery regulation voltage with 0.5% accuracy, 3.6V to 4.65V range, 10mV steps

Configurable Fast Charge Current from 5mA to 1A

55mΩ Battery FET On Resistance

Discharge current up to 2.5A for high system loads

Configurable Termination Current Supports Down to 0.5mA

Configurable NTC charge curve thresholds, including JEITA support

Power-down and advanced reset mechanisms for system recovery

2. Power path management for system power supply and battery charging

Regulated System Voltage (SYS) from 4.4V to 4.9V with Battery Tracking and Input Thru option

Configurable input current limit

System with choice of adapter or battery power

Dynamic power path management optimizes charging over weak adapters

3. Ultra-low quiescent current mode

15nA in Shutdown Mode

3.2µA in Ship Mode with Push Button Wake

3µA in battery-only mode

Input adapter Iq is 30µA in sleep mode

4. Single button wake-up and reset input

5. Integrated fault protection

Input Overvoltage Protection (VIN_OVP)

Battery Undervoltage Protection (VBUVLO)

Battery Short-Circuit Protection (BATSC)

Battery Over Current Protection (BATOCP)

Input Current Limit Protection (ILIM)

Thermal Regulation (TREG) and Thermal Shutdown (TSHUT)

Battery Thermal Fault Protection (TS)

Watchdog and safety timer failure

System short circuit protection

System overvoltage protection

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