Packaging information
| Package | Pins WSON (DLH) | 10 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the BQ25185
- 1A linear battery charger
- 3.0V to 18V input voltage operating range
- 25V tolerant input voltage
- External resistor programmable operation
- ILIM/VSET pin sets battery regulation voltage to 3.6V, 3.65V, 4.02V, 4.1V, 4.2V, 4.35V, or 4.4V
- ILIM/VSET pin sets input current limit to 100mA, 500mA, or 1100mA
- ISET pin sets charge current from 5mA to 1A
- Supports Li-ion, Li-poly, and LiFePO4 chemistries
- 115mΩ battery FET on-resistance
- Supports up to 3.125A discharge current for high system loads
- Power path management for powering the system and charging the battery
- Regulated system voltage (SYS) at 4.5V
- Configurable input current limit
- Supports USB suspend mode
- Battery tracking input voltage dynamic power management (VINDPM) for high-impedance input sources
- Dynamic power path management optimizes charging from weak adapters
- Ultra-low quiescent current
- 4µA in battery-only mode
- 30µA input adapter IQ in sleep mode
- 3.2µA battery discharge current in factory mode
- Integrated fault protection
- Input overvoltage protection (VIN_OVP)
- Battery undervoltage protection (BUVLO)
- Battery short protection (BATSC)
- Battery overcurrent protection (BATOCP)
- Input current limit protection (ILIM)
- Thermal regulation (TREG) and thermal shutdown (TSHUT)
- Battery thermal fault protection (TS)
- Safety timer fault
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System short protection
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System overvoltage protection
- Short and open protection on the ISET and ILIM/VSET pins
Description for the BQ25185
The BQ25185 is a linear battery charger IC optimized for small solution size and low quiescent current to extend battery life. The device is available in a small leadless package with a thermal pad for heat dissipation. The device supports up to 1A charging and system loads up to 3.125A.
The battery is charged using a standard Li-ion or LiFePO4 charging profile with three phases: precharge, constant current, and constant voltage. Thermal regulation provides the maximum charge current while managing the device temperature. The charger is optimized for battery-to-battery charging with 3V minimum input voltage operation and can withstand 25V absolute maximum line transients. The device integrates a single pushbutton input to reduce the total solution footprint.