Preliminary Datasheet
CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
General Description
The AP4305 is a highly integrated solution for a con-
stant voltage/constant current mode SMPS application.
The AP4305 contains one 1.21V voltage reference
with
±
0.5% accuracy, one current sensing circuit and
two operational amplifiers. Combining the voltage ref-
erence with one operational amplifier makes AP4305
an ideal voltage controller for use in adapters and bat-
tery chargers. The other low voltage reference com-
bined with the other operational amplifier makes it an
ideal current limiter for output low side current sens-
ing.
The AP4305 is available in SOT-23-6 package.
AP4305
Features
·
·
·
·
Constant Voltage and Constant Current Control
Precision Internal Voltage Reference
Few External Components
Easy Compensation
Applications
·
·
Adapters
Battery Chargers
SOT-23-6
Figure 1. Package Type of AP4305
Sep. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
1
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
