Data Sheet 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 Low Supply Current: 0.5mA Operating Temperature Range: -40 to 105oC Applications · · Adapters Battery Chargers The AP4305 is available in SOT-23-6 package. SOT-23-6 Figure 1. Package Type of AP4305 Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 1 Data Sheet 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 Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 2 Data Sheet 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. Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 3 Data Sheet 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 RθJC 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 Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 4 Data Sheet 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 Voltage Control Loop Reference VREF Input Bias Current (VCTRL) 1 TA=25oC mA/mV -40oC<TA< 105oC IIBV 3.5 2.5 TA=25oC 1.204 -40oC<TA< 105oC 1.186 1.21 1.216 V 1.234 TA=25oC 50 -40oC<TA< 105oC 100 nA CURRENT CONTROL LOOP Transconduction Gain (ICTRL). Sink Current Only Current Control Loop Reference Current Out of Pin ICTRL at 200mV Gmi VSENSE IIBI TA=25oC 1.5 7 IOUT=2.5mA, TA=25oC 198 200 IOUT=2.5mA, -40oC<TA< 105oC 192 mA/mV 202 mV 208 TA=25oC 25 -40oC<TA< 105oC 50 TA=25oC 200 TA=25oC 27 -40oC<TA< 105oC 35 µA OUTPUT STAGE Low Output Voltage at 10mA Sinking Current VOL Output Short Circuit Current. Output to VCC, Sink Current Only IOS mV 50 mA Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 5 Data Sheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Typical Performance Characteristics 1.220 203 1.215 VCC=12V VCC=5V VCC=2.5V 202 VSENSE (mV) VREF (V) 1.210 1.205 201 200 1.200 199 1.195 1.190 -40 -20 0 20 40 60 80 100 198 -40 120 -20 0 o 60 80 100 120 Figure 5. VSENSE vs. Ambient Temperature 45 100 VCC=12V VCC=5V VCC=2.5V 80 VCC=12V VCC=5V VCC=2.5V 40 35 IIBI (µA) 60 IIBV (nA) 40 Ambient Temperature ( C) Figure 4. VREF vs. Ambient Temperature 40 30 20 25 0 20 -20 -40 20 o Ambient Temperature ( C) -20 0 20 40 60 80 100 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 Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 6 Data Sheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Typical Performance Characteristics (Continued) 1.6 1.4 VCC=12V VCC=5V VCC=2.5V 50 1.2 Supply Current (mA) Output Short Circuit Current (mA) 60 40 30 20 VCC=12V VCC=5V VCC=2.5V 10 0 -40 -20 0 20 40 60 80 100 1.0 0.8 0.6 0.4 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. Figure 9. Supply Current vs. Ambient Temperature Ambient Temperature Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 7 Data Sheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Typical Application VOUT+ To primary R2 AP4305 VCC R4 1.210V R3 VOUT IL C1 + + VCTRL Load C3 GND R5 VSENSE ICTRL R1 R6 500 VOUTRss VOUT = VREF × R1 + R 2 R1 (V) VSENSE RSS (A) CurrentLimit = Figure 10. Typical Application 1 of AP4305 Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 8 Data Sheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Typical Application VOUT+ To primary AP4305 R2 VCC R4 1.210V R3 VOUT IL C1 + + VCTRL Load C3 GND R5 ICTRL VSENSE R1 R6 500 VOUTRss VOUT = [VREF + ( I L × RSS )] × R1 + R 2 − ( I L × RSS ) R1 CurrentLimit = VSENSE RSS (V) (A) Figure 11. Typical Application 2 of AP4305 Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 9 Data Sheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305 Typical Application VOUT+ To primary R2 AP4305 VCC R4 1.210V R3 VOUT IL C1 + + VCTRL Load C3 GND R5 ICTRL VSENSE R1 R6 500 VOUTRss VOUT = VREF × R1 + R 2 − ( I L × RSS ) R1 CurrentLimit = (V) VSENSE × VREF (VSENSE + VREF )× RSS (A) Figure 12. Typical Application 3 of AP4305 Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 10 Data Sheet 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) 5 0.300(0.012) 0.600(0.024) 4 1.500(0.059) 1.700(0.067) 2.650(0.104) 2.950(0.116) 6 0.200(0.008) Pin 1 Dot by Marking 1 2 3 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) Apr. 2007 Rev. 1. 5 BCD Semiconductor Manufacturing Limited 11 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. 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