Data Sheet 100-200VAC Input/12W Output Isolated AC/DC Converter BP5728 Absolute Maximum Ratings Dimensions (Unit : mm) Unit VD VFB VDD IDD PD Tcmax Topr Tstg 800 −0.2 to +6 24 8 0.64 105 −25 to +80 −25 to +105 V V V mA W °C °C °C Electrical Characteristics 18.8MAX. 1 3.25MAX. Symbol VDD fo VDD on VDD off Duty MAX Ioz Min. 8.9 59 15.5 7.7 68 0.85 Typ. 12 65 16.5 8.3 75 1.15 Max. 20 71 17.5 8.9 82 1.45 Unit Parameter Over drain current protection Symbol VDD 10V 15V 20V Min. 217 269 314 Typ. 247 302 349 Max. 281 338 388 Conditions R1 + T1 R2 0.8 IFB=0.5mA VDD=0→17.5V VDD=17.5→0V IFB=0.5mA IFB=0→1.55mA Unit 0.7 Conditions VD=0→15V mA SW1=R2 BP5728 AC80 to 154V(100V ) AC154V to 286V(200V ) R3 Vo C4 NP NS C7 D2 6 3 2 1 IC1 0.4 0.3 0.1 R4 ND PC1 R6 R7 C13 R5 -10 10 30 50 70 Ambient Templature Ta / 80 70 60 50 40 30 20 10 0 0 C12 R9 IC2 200 400 600 800 Pin No. Terminal name Terminal function Common terminal at primary side 1 COM 2 FB Feed back terminal 3 VDD Power supply terminal for internal drive 6 VD Drain terminal for built-in FET R8 Load regulation (In case of 12V output) Output charasteristic (Vi=311V, Ta=25°C) 14 12 10 8 6 4 2 0 : C5 is charged by R2 when the power is on, and the switching starts 0 500 1000 1500 Output current / mA when the voltage at VDD pin reaches the voltage threshold (17.5V max.) Vdd is supplied via Nd and FB current flows to PC1 once Vo exceeds the threshold voltage. Once PC1 2.During operation : turns ON a current Ioz flows through the transistor. Also, FB current runs to Pin 2 of BP5728 when Vo exceeds the designed voltage and the constant voltage control is executed. 3.In overcurrent conditions : The input current will increase if the output power increases, and the overcurrent protection circuit will turn ON once the Drain current exceeds the specified value (Idocp). www.rohm.com ©2010 ROHM Co., Ltd. All rights reserved. IC2 : FL1 : R1 : R2 : R3 : R4 : R5 : R6 : R7 : R8 : R9 : PC1 : T1 : ZNR1 : Rated at 300VAC or higher 0.1 to 0.22µF 22µF / 450V 2200pF / 1kV 10µF / 50V 470µF / 35V low impedance 0.1µF / 50V 2200pF / AC250V FRD 800V / 0.5A 80V / 0.1A SBD 90V / 3A 800V / 1A Use for safety BP5728 1/1 1000 Output current / mA Operating Principle 1.When turned on External Component Specifications C1,C2 : Noise reduction capacitors C3 : Input smoothing capacitor C4 : Noise reduction capacitor C5 : Vdd smoothing capacitor C7 : Output capacitor C12 : Phase compensation capacitor C13 : Noise reduction capacitor D2 : Rectifier diode D3 : Rectifier diode D4 : Rectifier diode DB : Diode bridge F1.F2 : Fuse IC1 : BP5728 90 °C Conversion Efficiency (In case of 12V output) D3 C5 Operation range 0.2 GND F2 Tsmax=105°C 0.5 Conversion efficiency (Vi=311V, Ta=25°C) 12V/0.5A(100V ) 12V/1A(200V ) D4 0.6 0 -30 Output voltage / V C3 4.35MAX. Derating curve − V kHz V V % mA + DB C2 0.25±0.05 5.55MAX. 90 + C1 6 0.5±0.1 1.3±0.2 Derating Curve Conversion efficiency / % Be sure to use fuse for safety. FL1 ZNR1 3 2.54±0.2 Application Circuit (In case of 12V output) F1 2 2.54X5=12.7TYP. (VDD=15V, Vd=15V,IFB=0.1mA,SW1=R1,Ta=25°C, unless otherwise specified) Parameter Input voltage Output frequency Turn on voltage Turn off voltage Maximum Duty Zero-Duty IFB Idocp 9.9MAX. MARKING SIDE Allowable loss / W 6pin Input Voltage 2pin Input Voltage 3pin Input Voltage 3pin Input Current Allowable Loss Max Surface Temperature Operating Temperature Range Storage Temperature Range MARKING SIDE Limits 19.5MAX. Symbol 4.0±1.0 Parameter Shunt regulator Noise reduction filter Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Photo coupler Switching transformer Varistor 2000 Vref=2.495V Use if necessary 0Ω 750kΩ 0.5W / 600V 200kΩ / 3W 51Ω / 0.125W 1kΩ / 0.1W 15kΩ / 0.1W 3kΩ / 0.1W 4.7kΩ / 0.1W 1kΩ / 0.1W PC817 SRW25ES-47V015(TDK) A varistor is required to protect against lightning surges and static electricity. 2010.01 - Rev.A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. 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