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| Preliminary Datasheet 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 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 Semiconductor Manufacturing Limited 2 Preliminary Datasheet 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. Sep. 2005 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 3 Preliminary Datasheet 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 JC 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 Sep. 2005 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 4 Preliminary Datasheet 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 ICC TA=25oC -40oC 1 mA 1 105oC 1.204 105oC 1.186 3.5 mA/mV 2.5 1.21 1.216 V 1.234 50 nA 100 1.5 7 mA/mV 198 105oC 192 200 202 mV 208 VSENSE 25 50 A 27 35 50 mA IOS Sep. 2005 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 5 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER Typical Performance Characteristics AP4305 1.230 204 1.225 203 VCC=12V VCC=5V VCC=2.5V 202 1.220 1.215 VSENSE (V) VREF (V) 201 200 1.210 199 1.205 198 1.200 -40 -20 0 20 40 60 o 80 100 120 197 -40 -20 0 20 40 60 o 80 100 120 Ambient Temperature ( C) Ambient Temperature ( C) Figure 4. VREF vs. Ambient Temperature Figure 5. VSENSE vs. Ambient Temperature 120 45 100 VCC=12V VCC=5V VCC=2.5V 40 VCC=12V VCC=5V VCC=2.5V 80 35 IIBV (nA) IIBI (A) -20 0 20 40 60 o 60 30 40 25 20 20 0 -40 80 100 120 15 -40 -20 0 20 40 60 o 80 100 120 Ambient Temperature ( C) Ambient Temperature ( C) Figure 6. IIBV vs. Ambient Temperature Figure 7. IIBI vs. Ambient Temperature Sep. 2005 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 6 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER Typical Performance Characteristics (Continued) AP4305 60 1.6 1.4 Output Short Circuit Current (mA) 50 1.2 VCC=12V VCC=5V VCC=2.5V 40 Supply Current (mA) 1.0 0.8 0.6 0.4 0.2 0.0 -40 30 20 VCC=12V VCC=5V VCC=2.5V 10 0 -40 -20 0 20 40 60 o 80 100 120 -20 0 20 40 60 o 80 100 120 Ambient Temperature ( C) Ambient Temperature ( C) Figure 8. Output Short Circuit Current vs. Ambient Temperature Figure 9. Supply Current vs. Ambient Temperature Sep. 2005 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 7 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER Typical Application AP4305 VOUT To primary AP4305 VCC R2 R4 VOUT 1.210V R3 C2 470K 22pF C1 2.2nF Load VCTRL 200mV GND ICTRL VSENSE C3 2.2nF R5 22K R1 R6 500 GND R7 Figure 10. Typical Application of AP4305 Sep. 2005 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 8 Preliminary Datasheet CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER Mechanical Dimensions SOT-23-6 Unit: mm(inch) AP4305 2.820(0.111) 3.020(0.119) 0.300(0.012) 0.400(0.016) 0.300(0.012) 0.600(0.024) 0 8 0.200(0.008) 2.650(0.104) 2.950(0.116) 0.700(0.028)REF 0.950(0.037)TYP 1.800(0.071) 2.000(0.079) 0.000(0.000) 0.100(0.004) 0.100(0.004) 0.200(0.008) 1.050(0.041) 1.050(0.041) 1.150(0.045) 1.250(0.049) Sep. 2005 Rev. 1. 1 9 1.500(0.059) 1.700(0.067) BCD Semiconductor Manufacturing Limited 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 - 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 BCD Semiconductor Manufacturing Limited - 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 |
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