BQ24780SRUYT Description

The BQ24780SRUYT is a high-efficiency, synchronous battery charger with a low component count for multi-chemistry battery charging applications that are space-constrained.

The hybrid power boost mode is supported by the BQ24780SRUYT (previously called "turbo boost mode"). When the system's power demand is temporarily higher than the adapter's maximum power level, it allows the battery to discharge energy to the system. As a result, the adapter does not crash.

For autonomous system power source selection, the BQ24780SRUYT uses two charge pumps to operate N-channel MOSFETs (ACFET, RBFET, and BATFET) individually.

BQ24780SRUYT Features

• Industrial Innovative Charge Controller With Hybrid Power Boost Mode

• The adapter and Battery Provides Power to System Together for Intel? CPU Turbo Mode

• Ultra-Fast Transient Response of 150 μs to Enter Boost Mode

• Hybrid Power Boost Mode from 4.5- to 24-V System

• Charge 1- to 4-Cell Battery Pack from 4.5- to 24-V Adapter

• High Accuracy Power and Current Monitoring for CPU Throttling

• Comprehensive PROCHOT Profile

• ± 2% Current Monitor Accuracy

• ± 5% System Power Monitor Accuracy (PMON)

• Automatic NMOS Power Source Selection from Adapter or Battery

• ACFET Fast Turn on in 100 μs

• Programmable Input Current, Charge Voltage, Charge and Discharge Current Limit

• ±0.4% Charge Voltage (16-mV step)

• ±2% Input Current (128-mA/step)

• ±2% Charge Current (64-mA/step)

• ±2% Discharge Current (512-mA/step)

• High Integration

• Battery LEARN Function

• Battery Present Monitor

• Boost Mode Indicator

• Loop Compensation

• BTST Diode

• Enhanced Safety Features for Overvoltage Protection, Overcurrent Protection, Battery, Inductor, and MOSFET Short-Circuit Protection

• Switching Frequency: 600 kHz, 800 kHz, and

• 1 MHz

• Realtime System Control on ILIM Pin to Limit Charge and Discharge Current

• 0.65 mA Adapter Standby Quiescent Current for Energy Star

BQ24780SRUYT Applications

• Smart Phones

• Portable Navigation Devices

• Low-Power Handheld Devices

• Portable Media Players