1 Features

• Hybrid Power Boost Mode to power up system

from adapter and battery together

– Ultra-fast transient response of 100μs to enter

Hybrid Power Boost Mode

– Ultra-fast ICHG recovery within 60μs after

exiting Hybrid Power Boost Mode

• Battery Only Boost Mode to support larger system

transients and extend battery run time

• Peak power two-level input current limit to

maximize the power from adapter and minimize

battery discharge

• Charge 1- to 4-cell battery pack from 4.5V to 24V

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 100μs when exiting learn

mode from battery removal

• Programmable input current, charge voltage,

charge and discharge current limit

– ±0.4% Charge voltage (16mV/step)

– ±2% Input current (64mA/step)

– ±2% Charge current (64mA/step)

– ±2% Discharge current (512mA/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: 300kHz, 400kHz, 600kHz,

and 800kHz

• Realtime system control on ILIM pin to limit charge

and discharge current

• 0.65mA Adapter standby quiescent current for

Energy Star

• Input current limit (IINDPM) up to 21.12A/10.56A

with 5mΩ/10mΩ sense resistor

• VSYSMIN regulation up to 16.128V+2.3V during

battery only boost mode

2 Applications

• Standard notebook PC and tablet (multimedia) PC

• Industrial and medical and healthcare equipment

• Personal electronics and portable electronics

• System with battery backup unit (BBU)

3 Description

The BQ24810 device is a high-efficiency, synchronous

buck multi-chemistry battery charger supporting 1-, 2-,

3-, or 4-series Li+ cells, or other battery chemistries

up to 19.2V.

Through SMBus, a host microcontroller programs

charge current, charge voltage, input current limit and

discharge current limit with high regulation accuracies.

Additionally, the BQ24810 supports a two level input

current limit (Peak Power mode) to fully utilize the

adapter capabilities and reduce battery discharge.

The BQ24810 provides adapter current (IADP),

battery discharge current (IDCHG), and system power

(PMON) signals to the host microcontroller and

outputs the PROCHOT signal to throttle back CPU

speed when needed.

The BQ24810 supports hybrid power boost mode to

boost the battery voltage to supplement the adapter

when system power demand is temporarily higher

than the adapter is able to provide. When the adapter

is not present, the BQ24810 supports battery only

boost mode to boost the battery voltage above the

minimum system operating voltage, providing more

headroom to support system transients.