AP4305UKTR-G1 Diodes Incorporated

A Product Line of Diodes Incorporated AP4305 CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER Description Pin Assignments The AP4305 is a highly integrated solution for a constant (Top View) voltage/constant current mode SMPS application. Pin 1 Mark The AP4305 contains one 1.21V voltage reference with 0.5% accuracy, one current sensing circuit and two operational amplifiers. Combining the voltage reference with one operational amplifier makes AP4305 an ideal voltage controller for use in adapters and battery V 1 6 V CTRL CC chargers. The other low voltage reference combined with the other operational amplifier makes it an ideal current limiter for output low 5 V GND 2 SENSE side current sensing. The AP4305 is available in SOT26 package. V 3 4 I OUT CTRL Features SOT26 Constant Voltage and Constant Current Control Precision Internal Voltage Reference Few External Components Applications Easy Compensation Adapters Low Supply Current: 0.5mA o Battery Chargers Operating Temperature Range: -40 to +105 C Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See A Product Line of Diodes Incorporated AP4305 Typical Applications Circuit (Cont.) V + OUT To primary R2 AP4305 I L V CC R4 1.210V C1 R3 V OUT Loa + + V CTRL d C3 GND R5 I V CTRL SENSE R1 R6 500 V - OUT Rss R1 R2 V SENSE (V) (A) V V (I R ) (I R ) CurrentLimit OUT REF L SS L SS R1 R SS Typical Application 2 V + OUT To primary R2 I AP4305 L V CC R4 1.210V C1 R3 V OUT Loa + + V CTRL d C3 GND R5 I V CTRL SENSE R1 R6 500 V - OUT Rss R1 R2 V V (V) SENSE REF (A) V V (I R ) CurrentLimit OUT REF L SS R1 V V R SENSE REF SS Typical Application 3 2 of 10 AP4305 September 2014 Diodes Incorporated www.diodes.com Document number: DS37513 Rev.2 - 2