Preliminary Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER General Description Features The AP3765 is a high performance AC/DC power supply controller for battery charger and adapter applications. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. · · · · · The AP3765 provides accurate constant voltage, constant current (CV/CC) regulation while removing the opto-coupler and secondary control circuitry. It also eliminates the need of loop compensation circuitry while maintaining stability. The AP3765 achieves excellent regulation and high average efficiency, yet meets the requirement for no-load consumption less than 30mW. · · · · · · · The AP3765 is available in SOT-23-6 package. AP3765 Primary Side Control for Rectangular Constant Current and Constant Voltage Output Sub-microampere Start-up Current 30mW No-load Input Power Feasible Tight CV Regulation Performance Eliminates Opto-coupler and Secondary CV/CC Control Circuitry Eliminates Control Loop Compensation Circuitry Flyback Topology in DCM Operation Random Frequency Modulation to Reduce System EMI Built-in Soft Start Open Feedback Protection Short Circuit Protection SOT-23-6 Package Applications · · · Adapters/Chargers for Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus LED Drivers Standby and Auxiliary Power Supplies SOT-23-6 Figure 1. Package Type of AP3765 Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER AP3765 Pin Configuration K6 Package (SOT-23-6) Pin 1 Dot by Marking OUT 1 6 FB GND 2 5 GND VCC 3 4 CS Figure 2. Pin Configuration of AP3765 (Top View) Pin Description Pin Number Pin Name Function 1 OUT This pin drives the base of external power NPN switch 2, 5 GND Ground 3 VCC Supply voltage 4 CS The primary current sense 6 FB The voltage feedback from the auxiliary winding Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited 2 Preliminary Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER AP3765 Functional Block Diagram VCC 3 FB 6 0.1V COMP pfm Tonsec Detector Regulator & Bias Tons UVLO OCkP EA 4.0V CV_ctrl R Constant Voltage Control Q pfm Driver 1 OUT S CS 4 Peak Current Control & LEB Tons Constant Current Control R Q CC_ctrl 2, 5 GND S Figure 3. Functional Block Diagram of AP3765 Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited 3 Preliminary Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER AP3765 Ordering Information AP3765 - Circuit Type G1: Green Package K6: SOT-23-6 TR: Tape and Reel Package Temperature Range SOT-23-6 -40 to 85oC Part Number AP3765K6TR-G1 Marking ID GBB Packing Type Tape & Reel BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green. Absolute Maximum Ratings (Note 1) Parameter Value Unit Supply Voltage VCC -0.3 to 36 V Voltage at CS, OUT to GND -0.3 to 7 V FB Input -40 to 10 V Internally limited A Output Current at OUT Operating Junction Temperature 150 Storage Temperature o -65 to 150 C oC Lead Temperature (Soldering, 10s) 300 Thermal Resistance Junction-to-Ambient 250 ESD (Machine Model) 200 V ESD (Human Body Model) 2000 V o o C 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. Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited 4 Preliminary Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER AP3765 Electrical Characteristics (VCC=15V, TA=25oC, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max Unit VTH (ST) 16 18.5 21 V VOPR(min) 7.2 9 10.2 V 0.6 µA 200 320 µA 24 30 36 VCS 455 510 545 mV VCS(PRE) 365 410 455 mV UVLO SECTION Start-up Threshold Minimal Operating Voltage STANDBY CURRENT SECTION IST Start-up Current Operating Current ICC(OPR) VCC = VTH (ST)-0.5V, Before start-up Static DRIVE OUTPUT SECTION OUT Maximum Current Sink Source 50 IOUT mA CURRENT SENSE SECTION Current Sense Threshold Pre-Current Sense Leading Edge Blanking 750 ns FEEDBACK INPUT SECTION Feedback Current Pin Input Feedback Threshold Leakage IFB VFB=4V VFB Feb. 2010 Rev. 1. 0 2.0 2.5 3.1 µA 3.89 3.95 4.01 V BCD Semiconductor Manufacturing Limited 5 Preliminary Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER AP3765 Typical Performance Characteristics 10.5 Minimal Operating Voltage (V) 21 Start-up Voltage (V) 20 19 18 17 16 -40 -20 0 20 40 60 80 100 10.0 9.5 9.0 8.5 8.0 7.5 -40 120 -20 0 o 20 40 60 80 100 120 o Ambient Temperature ( C) Ambient Temperature ( C) Figure 5. Mininal Operating Voltage vs. Ambient Temperature Figure 4. Start-up Voltage vs. Ambient Temperature 6 300 280 5 240 4 220 IFB (µA) Operating Current (µA) 260 200 3 180 2 160 140 1 120 100 -40 -20 0 20 40 60 80 100 0 -40 120 -20 0 20 40 60 80 100 120 o o Ambient Temperature ( C) Ambient Temperature ( C) Figure 6. Operating Current vs. Ambient Temperature Figure 7. IFB vs. Ambient Temperature Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited 6 Preliminary Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER AP3765 Typical Application D2 T1 V O+ + C1 R1 + C2 R5 D1 V D3 R2 VCC OUT R3 CS Ns C4 + VO- N FB V Q1 AP3765 R4 C3 NP R6 FB GND R7 Rs Figure 8. 5V/700mA Output for Battery Charger of Mobile Phone Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited 7 Preliminary Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER AP3765 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) 0.900(0.035) 1.450(0.057) MAX 1.300(0.051) Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited 8 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein. 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