Texas Instruments Evaluation Module for BQ25070 1A, Single cell, Linear Charger for LiFePO4 Applications BQ25070EVM-740 BQ25070EVM-740 Scheda Tecnica
Codici prodotto
BQ25070EVM-740
User
'
s Guide
SLVU473
–
May 2011
1A, Single Cell LiFePO
4
Linear Battery Charger with 4.9 V,
50 mA LDO
This user
’
s guide describes the bq25070 evaluation module (EVM), how to perform a stand-alone
evaluation or interface with a host or system. The converter is designed to deliver up to 1 A of continuous
current to the battery and/or system. The device has a 4.9 VDC, 50 mA max internal LDO that can be
used for USB applications or any other need.
current to the battery and/or system. The device has a 4.9 VDC, 50 mA max internal LDO that can be
used for USB applications or any other need.
Contents
1
Introduction
..................................................................................................................
2
Considerations With Evaluating the bq25070
...........................................................................
3
Performance Specification Summary
.....................................................................................
4
Test Summary
...............................................................................................................
4.1
Equipment
...........................................................................................................
4.2
Equipment and EVM Setup
.......................................................................................
4.3
Test Procedure
.....................................................................................................
5
Schematic, Physical Layouts and Bill of Materials
.....................................................................
5.1
Schematic
...........................................................................................................
5.2
Physical Layouts
...................................................................................................
5.3
Bill of Materials
....................................................................................................
List of Figures
1
EVM Schematic and Evaluation SetupTop Schematic: Application CircuitBottom Circuit: Hardware
Evaluation/Test Circuit to Generate Pulses to Program IC, done by host in Typical Application.
Evaluation/Test Circuit to Generate Pulses to Program IC, done by host in Typical Application.
................
2
Pulse Programming
–
CH2: 11 pulses; CH1: V
OUT
IR change due to increased charge current.
.................
3
Battery cell Replacement
–
Allows quick battery adjustment
.........................................................
4
bq25070 EVM Board Schematic (Sheet 1 of 2)
.........................................................................
5
bq25070 EVM Board Schematic (Sheet 2 of 2)
.........................................................................
6
Assembly Layer
.............................................................................................................
7
Top Layer
....................................................................................................................
8
Bottom Layer
...............................................................................................................
1
SLVU473
–
May 2011
1A, Single Cell LiFePO
4
Linear Battery Charger with 4.9 V, 50 mA LDO
Copyright
©
2011, Texas Instruments Incorporated