Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER General Description Features 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. AP4305 Constant Voltage and Constant Current Control Precision Internal Voltage Reference Few External Components Easy Compensation Applications * * Adapters Battery Chargers The AP4305 is available in SOT-23-6 package. SOT-23-6 Figure 1. Package Type of AP4305 BCD Semiconductor Manufacturing Limited Sep. 2005 Rev. 1. 1 1 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Pin Configuration K Package (SOT-23-6) VCTRL 1 6 VCC GND 2 5 VSENSE VOUT 3 4 ICTRL Figure 2. Pin Configuration of AP4305 (Top View) Pin Description Pin Number Pin Name Function 1 VCTRL 2 GND Ground 3 VOUT Output pin. Sinking current only 4 ICTRL Input pin of the current control loop 5 VSENSE Input pin of the current control loop 6 VCC Input pin of the voltage control loop Power supply BCD Semiconductor Manufacturing Limited Sep. 2005 Rev. 1. 1 2 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Functional Block Diagram VCC 6 1.210V 3 1 VOUT VCTRL 200mV 2 GND 5 4 ICTRL VSENSE Figure 3. Functional Block Diagram of AP4305 Ordering Information AP4305 Package SOT-23-6 - Circuit Type E1: Lead Free Blank: Tin Lead Package K: SOT-23-6 TR: Tape and Reel Blank: Tube Part Number Temperature Range Tin Lead -40 to 105oC AP4305KTR Lead Free AP4305KTR-E1 Marking ID Tin Lead K2B Packing Type Lead Free E2B Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. BCD Semiconductor Manufacturing Limited Sep. 2005 Rev. 1. 1 3 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Power Supply Voltage VCC 20 V Input Voltage VIN -0.3 to VCC V Junction Temperature TJ 150 oC Storage Temperature TSTG -65 to 150 TLEAD 260 JC 92 Lead Temperature (Soldering, 5sec) Package Thermal Resistance (Junction to Case) o C oC o 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 Min Max Unit VCC 2.5 18 V TA -40 105 oC BCD Semiconductor Manufacturing Limited Sep. 2005 Rev. 1. 1 4 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Electrical Characteristics (VCC=5V, TA=25oC, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max TA=25oC 0.5 1 -40oC<TA<105oC 0.6 Unit TOTAL CURRENT CONSUMPTION Total Supply Current Not Including the Output Sinking Current ICC mA VOLTAGE CONTROL LOOP Transconduction Gain (VCTRL). Sink Current Only Gmv 1 TA=25oC mA/mV -40oC<TA< Voltage Control Loop Reference VREF IIBV 2.5 105oC 1.204 TA=25oC 1.21 1.216 V -40oC<TA< Input Bias Current (VCTRL) 3.5 1.186 105oC 1.234 50 TA=25oC nA -40oC<TA< 105oC 100 CURRENT CONTROL LOOP Transconduction Gain (ICTRL). Sink Current Only Current Control Loop Reference Gmi TA=25oC VSENSE IOUT=2.5 mA TA=25oC -40oC<TA< Current Out of Pin ICTRL at 200mV IIBI 1.5 7 198 200 mA/mV 202 mV 105oC 192 208 25 TA=25oC C<TA< 105 C -40o o A 50 OUTPUT STAGE Low Output Voltage at 10mA Sinking Current Output Short Circuit Current. Output to VCC. Sink Current Only VOL IOS TA=25oC 200 TA=25oC 27 -40oC<TA< 105oC 35 mV 50 mA BCD Semiconductor Manufacturing Limited Sep. 2005 Rev. 1. 1 5 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Typical Performance Characteristics 204 1.230 VCC=12V 203 1.225 VCC=5V 202 VCC=2.5V VSENSE (V) VREF (V) 1.220 1.215 201 200 1.210 199 1.205 1.200 -40 198 -20 0 20 40 60 80 100 197 -40 120 -20 0 20 40 60 80 Figure 4. VREF vs. Ambient Temperature Figure 5. VSENSE vs. Ambient Temperature 45 120 VCC=12V 100 VCC=12V 40 VCC=5V VCC=5V VCC=2.5V 60 30 40 25 20 20 -20 0 20 40 60 80 100 VCC=2.5V 35 IIBI (A) 80 IIBV (nA) 120 Ambient Temperature ( C) Ambient Temperature ( C) 0 -40 100 o o 15 -40 120 -20 0 20 40 60 80 100 120 o o Ambient Temperature ( C) Ambient Temperature ( C) Figure 6. IIBV vs. Ambient Temperature Figure 7. IIBI vs. Ambient Temperature BCD Semiconductor Manufacturing Limited Sep. 2005 Rev. 1. 1 6 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Typical Performance Characteristics (Continued) 1.6 60 VCC=12V VCC=5V 1.2 Supply Current (mA) Output Short Circuit Current (mA) 1.4 50 40 30 20 VCC=12V 0 -40 VCC=2.5V -20 0 20 40 60 80 100 0.8 0.6 0.4 VCC=5V 10 VCC=2.5V 1.0 0.2 0.0 -40 120 o -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Ambient Temperature ( C) Figure 8. Output Short Circuit Current vs. Ambient Temperature Figure 9. Supply Current vs. Ambient Temperature BCD Semiconductor Manufacturing Limited Sep. 2005 Rev. 1. 1 7 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Typical Application VOUT To primary R2 AP4305 VCC R4 1.210V R3 VOUT C2 470K 22pF VCTRL C1 2.2nF Load C3 2.2nF 200mV GND ICTRL R5 22K VSENSE R1 R6 500 GND R7 Figure 10. Typical Application of AP4305 BCD Semiconductor Manufacturing Limited Sep. 2005 Rev. 1. 1 8 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Mechanical Dimensions SOT-23-6 Unit: mm(inch) 0 2.820(0.111) 8 3.020(0.119) 0.300(0.012) 0.400(0.016) 0.200(0.008) 1.500(0.059) 1.700(0.067) 2.650(0.104) 2.950(0.116) 0.300(0.012) 0.600(0.024) 0.700(0.028)REF 0.950(0.037)TYP 0.000(0.000) 0.100(0.004) 1.800(0.071) 2.000(0.079) 0.100(0.004) 0.200(0.008) 1.050(0.041) 1.050(0.041) 1.150(0.045) 1.250(0.049) BCD Semiconductor Manufacturing Limited Sep. 2005 Rev. 1. 1 9 http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. MAIN SITE BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Limited 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 - IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office 27B, Tower C, 2070, Middle Shen Nan Road, Shenzhen 518031, China Tel: +86-755-8368 3987, Fax: +86-755-8368 3166 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808, Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corporation 3170 De La Cruz Blvd., Suite 105, Santa Clara, CA 95054-2411, U.S.A Tel: +1-408-988 6388, Fax: +1-408-988 6386