Introduction
1
Introduction
1.1
bq2427x IC Features
The bq24272/273 integrates a synchronous PWM controller, power MOSFETs, input-current sensing,
high-accuracy current and voltage regulation, charge termination and power-path management into a
small WCSP package. The charge parameters are programmable through an I
2
C interface. Key IC
features include:
•
High-efficiency, fully integrated, NMOS-NMOS, synchronous buck charger with 1.5-MHz frequency
•
Integrated power FETs for up to a 2.5-A charge rate
•
Power-path management between battery and system voltages
For details, see the bq24272/273 data sheets (
).
1.2
bq24272/273 EVM Features
The bq24272/273 evaluation module (EVM) is a complete charger module for evaluating compact, flexible,
high-efficiency, switch-mode battery charge and power-path management solution for single-cell, Li-ion
and Li-polymer battery-powered systems used in a wide range of portable applications. Key EVM features
include:
•
76.2-mm × 76.2-mm × 1.2-mm footprint for entire solution
•
Input power connector for AC adapter
•
Programmable battery voltage, charge current, input current, and status via I
2
C™ interface
•
IN operating range of 4.2 V – 10 V
•
LED indication for status signals
•
Test points for key signals available for testing purposes. Easy probe hook-up.
2
WCSP-Packaged bq24272/273 Evaluation Modules
SLUU916 – April 2012
Copyright © 2012, Texas Instruments Incorporated
