ADP2291_15 Datasheet, PDF (2/20 Pages) Analog Devices – Compact, 1.5 A Linear Charger for Single-Cell Li Battery

ADP2291
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Typical Operating Circuit................................................................ 1
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ............................................. 7
Theory of Operation ...................................................................... 10
Precharge Mode.......................................................................... 10
End-of-Charge Mode................................................................. 10
Shutdown Mode.......................................................................... 10
Charge Restart............................................................................. 10
Programmable Timer................................................................. 10
Charge Status Indicator ............................................................. 10
Automatic Reverse Isolation ..................................................... 10
Overshoot Protection................................................................. 10
Power Supply Checks................................................................. 10
Thermal Shutdown .................................................................... 11
Application Information................................................................ 12
Setting the Maximum Charge Current.................................... 12
Setting the Maximum Charge Time ........................................ 12
External Capacitors.................................................................... 12
Reverse Input Protection........................................................... 12
External Pass Transistor ............................................................ 13
Typical Application Circuit....................................................... 14
Charge Termination................................................................... 14
Selectable Charge Current......................................................... 14
Thermal Protection.................................................................... 14
Printed Circuit Board Layout Considerations ....................... 16
LFSCP Layout Considerations.................................................. 16
Outline Dimensions ....................................................................... 17
Ordering Guide .......................................................................... 17
REVISION HISTORY
11/05—Rev. 0 to Rev. A
Changes to Equation 7 ................................................................... 13
Changes to Figure 26...................................................................... 15
Changes to Table 7.......................................................................... 16
Changes to Ordering Guide .......................................................... 17
Updated Outline Dimensions ....................................................... 17
10/04—Initial Version: Revision 0
Rev. A | Page 2 of 20