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
