SGM41527.pdf? 4A Synchronous 1.6MHz PWM Charger
Cycle-by-Cycle Current Limit
Integrated 24V Switching MOSFETs
Integrated Bootstrap Diode
Digital Soft-Start
? Up to 95.2% Charge Efficiency
? 30V Absolute Maximum Input Voltage Rating with
Adjustable Over-Voltage Threshold
? 4.5V to 22V Input Operating Voltage Range
? Automatic Power Path Selector (Battery/Adapter)
? Dynamic Power Management (DPM)
? Battery Charge Voltage Select 2-, 3-, or 4-Cell with 4.2V/Cell
? Less than 18μA Battery Current (No Adapter)
? Less than 1.3mA Input Current (Charge Disabled)
? High Accuracy
±0.5% Charge Voltage Regulation
±4% Charge Current Regulation
? Thermal Regulation (Current Limit for TJ = +120°C)
? Thermal Shutdown
? Battery Thermistor Sense Hot/Cold Charge Suspend
? Input Under-Voltage Lockout (UVLO)
? Input Over-Voltage (ACOV) Protection
? 1.6MHz Synchronous Switch-Mode Charger with 4A
Integrated N-MOSFETs
? Up to 94% Efficiency
? 4.5V–17V Input Operating Range
? Battery Charge Voltage
– bq24172: Adjustable Charge Voltage
? Safety
– Thermal Regulation Loop Throttles Back Current to Limit
Tj = 120°C
– Thermal Shutdown
– Battery Thermistor Sense Hot/Cold Charge Suspend &
Battery Detect
? High Integration
– Thermal Regulation Loop Throttles Back Current to Limit
Tj = 120°C
– Dynamic Power Management
– Integrated 20-V Switching MOSFETs
? Accuracy
– ±0.5% Charge Voltage Regulation
– ±4% Charge Current Regulation
? Less than 1.5mA Input Current with Adapter Present and
Charge Disabled
