BCD Semiconductor Manufacturing Limited AP4305
The AP4305 is a highly integrated solution for a constant 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. The other low voltage reference combined with the other operational amplifier makes it an ideal current limiter for output low side current sensing.GENERAL DESCRIPTION
Combining the voltage reference with one operational amplifier makes AP4305 an ideal voltage controller for use in adapters and battery chargers. The AP4305 is available in SOT-23-6 package. AP4305FEATURES
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● 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 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER Pin Configuration K Package (SOT-23-6) AP4305 VCTRL GND VOUT 1 2 3 6 5 4 VCC VSENSE ICTRL Figure 2. Pin Configuration of AP4305 (Top View) Pin
DESCRIPTION
Pin Number 1 2 3 4 5 6 Pin Name VCTRL GND VOUT ICTRL VSENSE VCC Input pin of the voltage control loop Ground Output pin. Sinking current only Input pin of the current control loop Input pin of the current control loop Power supply Function Sep. 2005 Rev. 1. 1 BCD Sem...