Texas Instruments Evaluation Module for BQ25050 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO BQ25 BQ25050EVM Scheda Tecnica

This user's guide describes the features and operation of the bq25050/bq25060EVM Evaluation Module
(EVM). This EVM assists users in evaluating the bq25050 and bq25060 linear battery chargers. The
manual includes the bq25050/bq25060EVM bill of materials, board layout, and schematic.

1

Introduction

..................................................................................................................

1.1

EVM Features

......................................................................................................

1.2

General Description

................................................................................................

1.3

I/O Description

......................................................................................................

1.4

Control and Key Parameters Setting

............................................................................

1.5

Recommended Operating Conditions

...........................................................................

2

Equipment

....................................................................................................................

2.1

Power Supplies

.....................................................................................................

2.2

Loads

................................................................................................................

2.3

Meters

...............................................................................................................

2.4

Computer and Interface

...........................................................................................

3

Equipment Setup

............................................................................................................

4

Procedure

....................................................................................................................

4.1

Charger Operation with Minimum System Voltage Mode

....................................................

4.2

Input Current Setting

..............................................................................................

4.3

Charger Cut-Off by Thermistor

...................................................................................

5

PCB Layout Guideline

......................................................................................................

6

Bill of Materials, Board Layout, and Schematics

........................................................................

6.1

Bill of Materials

.....................................................................................................

6.2

Board Layout

......................................................................................................

6.3

Schematic

.........................................................................................................

1

Original Test Setup for HPA577-001 – bq25050EVM

..................................................................

2

Original Test Setup for HPA577-002 – bq25060 EVM

.................................................................

3

Battery Load Circuit – Replacement for a Single Cell Li-Ion Battery

→

BAT+ to BAT– Voltage Tracks P/S

Input Voltage Minus 1 Diode Drop.

......................................................................................

4

Top Layer

...................................................................................................................

5

Bottom Layer

...............................................................................................................

6

Top Assembly

..............................................................................................................

7

bq25050/60 EVM Schematic (Sheet 1 of 1)

...........................................................................

1

I/O Description

...............................................................................................................

2

Control and Key Parameters Setting

.....................................................................................

3

Recommended Operating Conditions

....................................................................................

4

Bill of Materials

..............................................................................................................

1

SLUU438 – July 2010

Copyright © 2010, Texas Instruments Incorporated