HOST

SMBus

To System

Adaptor

2S-3S

Ultra-Fast

DPM

Ultra-Low Quiescent

Current

N-FET

Driver

SMBus Controls V and I

with High Accuracy

6-24V

Iin, Idischarge

Support CPU Turbo Mode

PMOS BAT

FET Driver

Integrated Compensation Internal Soft Start

Iin

Ichg

Enhanced Safety

Features

OCP, OVP,

FET Short

Adaptor Detection

Optional

NVDC-1

Charger

Controller

bq24715

Simplified Application Diagram

bq24715

www.ti.com

SLUSBD1 – FEBRUARY 2013

2-3 Cell NVDC-1 Battery Charger Controller

with Ultra-Fast Transient Response and High Light-Load Efficiency

Check for Samples: bq24715

1

FEATURES

APPLICATIONS

•

6-24V Input SMBus NVDC-1 2-3S Battery

•

Ultrabook, Notebook, and Tablet PC

Charger Controller

•

Industrial and Medical Equipment

•

System Instant-on Operation with No Battery

•

Portable Equipment

or Deeply Discharged Battery

•

Ultra-Fast Transient Response of 100 µs

DESCRIPTION

The bq24715 is a NVDC-1 synchronous battery

•

Ultra-Low Quiescent Current of 500 µA and

charge controller with low quiescent current, high light

High PFM Light Load Efficiency 80% at 20mA

load efficiency for 2S or 3S Li-ion battery charging

load to Meet Energy Star and ErP Lot6

applications, offering low component count.

•

Switching Frequency: 600kHz/800kHz/1MHz

The power path management allows the system to be

•

Programmable System/Charge Voltage (16

regulated at battery voltage but does not drop below

mV/step), Input/Charge Current (64 mA/step)

the programmable system minimum voltage.

with High Accuracy

The bq24715 provides N-channel ACFET and RBFET

–

±0.5% Charge Voltage Regulation

drivers for the power path management. It also

–

±3% Input/Charge Current Regulation

provides driver of the external P-channel battery FET.

–

±2% 40x Input/16x Discharge Current

The loop compensation is fully integrated.

Monitor Output

The

bq24715

has

programmable

11-bit

charge

•

Support Battery LEARN Function

voltage, 7-bit input/charge current and 6-bit minimal

system voltage with very high regulation accuracies

•

Maximize CPU Performance with Deeply

through the SMBus communication interface.

Discharged Battery or No Battery

•

Integrated NMOS ACFET and RBFET Driver

The bq24715 monitors adapter current or battery

discharge current through the IOUT pin allowing the

•

host to throttle down CPU speed when needed.

The bq24715 provides extensive safety features for

over current, over voltage and MOSFET short circuit.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCT PREVIEW information concerns products in the

Copyright © 2013, Texas Instruments Incorporated

formative or design phase of development. Characteristic data and

other specifications are design goals. Texas Instruments reserves

the right to change or discontinue these products without notice.