AP4305KTR-E1

Data Sheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER General Description 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. Combining the voltage reference with one operational amplifier makes AP4305 an ideal voltage controller for use in adapters and battery chargers. The other low voltage reference combined with the other operational amplifier makes it an ideal current limiter for output low side current sensing. 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 Low Supply Current: 0.5mA Operating Temperature Range: -40 to 105oC Applications · · Adapters Battery Chargers SOT-23-6 Figure 1. Package Type of AP4305 Apr. 2007 Rev. 1. 5 1 BCD Semiconductor Manufacturing Limited Data Sheet 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 Function 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 Apr. 2007 Rev. 1. 5 2 BCD Semiconductor Manufacturing Limited Data Sheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER Functional Block Diagram VCC 6 AP4305 1.210V 3 VOUT 1 VCTRL 200mV 2 GND 4 5 ICTRL VSENSE Figure 3. Functional Block Diagram of AP4305 Ordering Information AP4305 Circuit Type E1: Lead Free Blank: Tin Lead TR: Tape and Reel Blank: Tube Package K: SOT-23-6 Package SOT-23-6 Temperature Range -40 to 105oC Part Number Tin Lead AP4305KTR Lead Free AP4305KTR-E1 Marking ID Tin Lead K2B Lead Free E2B Packing Type Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Apr. 2007 Rev. 1. 5 3 BCD Semiconductor Manufacturing Limited Data Sheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER Absolute Maximum Ratings (Note 1) Parameter Power Supply Voltage Input Voltage Junction Temperature Storage Temperature Lead Temperature (Soldering, 5sec) Package Thermal Resistance (Junction to Case) Symbol VCC VIN TJ TSTG TLEAD RθJC Value 20 -0.3 to VCC 150 -65 to 150 260 92 o AP4305 Unit V V oC o C oC C/W Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Power Supply Voltage Operating Temperature Range Symbol VCC TA Min 2.5 -40 Max 18 105 Unit V oC Apr. 2007 Rev. 1. 5 4 BCD Semiconductor Manufacturing Limited Data Sheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER Electrical Characteristics (VCC=5V, TA=25oC, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max Unit AP4305 TOTAL CURRENT CONSUMPTION Total Supply Current Not Including the Output Sinking Current VOLTAGE CONTROL LOOP Transconduction Gain (VCTRL). Sink Current Only Gmv TA=25oC -40oC