AD8451

Data Sheet

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

General Description ......................................................................... 1

Functional Block Diagram .............................................................. 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 6

Thermal Resistance ...................................................................... 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ............................................. 9

IA Characteristics ......................................................................... 9

DA Characteristics ..................................................................... 11

CC and CV Loop Filter Amplifiers, and VSET Buffer .......... 13

VINT Buffer ................................................................................ 15

Reference Characteristics .......................................................... 16

Theory of Operation ...................................................................... 17

Overview...................................................................................... 17

Instrumentation Amplifier (IA) ............................................... 18

Difference Amplifier (DA)........................................................ 19

CC and CV Loop Filter Amplifiers.......................................... 19

MODE Pin, Charge and Discharge Control ........................... 21

Applications Information .............................................................. 22

Functional Description.............................................................. 22

Power Supply Connections ....................................................... 23

Current Sense IA Connections................................................. 23

Voltage Sense DA Connections................................................ 23

Battery Current and Voltage Control Inputs (ISET and VSET)

....................................................................................................... 23

Loop Filter Amplifiers ............................................................... 24

Connecting to a PWM Controller (VCTRL Pin) ...................... 24

Step-by-Step Design Example................................................... 24

Evaluation Board ............................................................................ 26

Introduction................................................................................ 26

Features and Tests....................................................................... 26

Evaluating the AD8451.............................................................. 27

Schematic and Artwork............................................................. 28

Outline Dimensions....................................................................... 32

Ordering Guide .......................................................................... 32

REVISION HISTORY

3/14—Revision 0: Initial Version

Rev. 0 | Page 2 of 32