Adaptor

VBUS

AC/DC

Converter

Host + PD Controller

(MSP430 + TPS25740)

D+/D-

CC1/ CC2

VOUT

SYS

BAT

SYSTEM

bq25970

SC

Phase #1

SC

Phase #2

bq2589x

SW

D+/D-

PD Controller

(TUSB422)

AP

(MSP430)

Phone

I2C

Copyright © 2017, Texas Instruments Incorporated

Product

Folder

Order

Now

Technical

Documents

Tools &

Software

Support &

Community

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

bq25970, bq25971

SLUSD72A – NOVEMBER 2017 – REVISED DECEMBER 2017

Chargers With ADC

1

1 Features

1

•

97% Efficient Power Stage for 8-A Fast Charge

•

Switched Cap Architecture Optimized for 50%

Duty Cycle

–

Input Voltage is 2x Battery Voltage (3.5 V to

4.65 V)

–

Output Current is 2x of Input Current (up to

4.5 A)

–

Reduces Power Loss Across the Cable

•

Integrated Programmable Protection Features for

Safe Operation

–

Input Over-Voltage Protection (BUS_OVP)

–

Input Over-Current Protection (BUS_OCP) with

Adjustable Alarm

–

Input Over-Voltage with External OVP FET

(VAC_OVP up to 17 V, bq25970 only)

–

Battery Over-Voltage Protection (BAT_OVP)

with Adjustable Alarm

–

Output Over-Voltage (VOUT_OVP)

–

Input Over-Current Protection (BUS_OCP) with

Adjustable Alarm

–

IBAT Over-Current Protection (BAT_OCP) with

Adjustable Alarm

–

Battery Temperature Monitoring

–

Connector Temperature Monitoring

•

Programmable Settings for System Optimization

–

Optional VBATREG and IBATREG Regulation

for System Load and Wall Adapter Transients

(bq25970 only with External OVP FET)

–

STAT, FLAG, and MASK options for Interrupts

–

ADC Readings and Configuration

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

External OVP Capable

(3)

No External OVP

•

Integrated 12-Bit Effective Analog-to Digital

Converter (ADC)

–

±0.5% BUS Voltage

–

±0.5% VOUT Voltage

–

–0.4% to 0.2% BAT Voltage with Differential

Sensing

–

±1.5% BAT Current at 6 A with External

–

±1% BAT Temperature

–

±1% BUS Temperature

–

±4°C Die Temperature

2 Applications

•

Smart Phone

•

Tablet PC

3 Description

The bq2597x is a 97% efficient, 8-A battery charging

solution using a switched cap architecture. This

architecture and the integrated FETs are optimized to

enable a 50% duty cycle, allowing the cable current

to be half the current delivered to the battery,

reducing the losses over the charging cable as well

as limiting the temperature rise in the application.

PART NUMBER

PACKAGE

BODY SIZE (NOM)

DSBGA (56)

3.00 mm x 3.20 mm

DSBGA (56)

3.00 mm x 3.20 mm

Simplified Application