Data Sheet 220VAC Input/12VDC (1A) Output Isolated AC/DC Converter BP5722A12 Absolute Maximum Ratings Dimensions (Unit : mm) Unit V V mA mA W kW 105 °C Topr −25 to +80 °C Tstg −40 to +105 °C 1 sec (between primary and secondary) Ambient temperature + module Tcmax self-heating Line regulation Load regulation Output ripple voltage Power conversion efficiency 1 2 6 7 8 9 P=2.54±0.2 11 0.5±0.1 1.3±0.2 3.3 MAX. 0.25±0.05 5.6 MAX. 2.54 x 10 =25.4 3.7 MAX. Derating Curve Electrical Characteristics Parameter Symbol Pin 11 input voltage VD Operating power V DD voltage(Pin 7) Rated output voltage Vo Rated output current Io 9.3 MAX. 32.5 MAX. 12 Output Power (W) Tcmax Conditions 21.5 MAX. Limits 800 25 350 10 13 2.5 4.0±1.0 Symbol VD VDD ID IDD Po VI Mark side Parameter Pin 11 input voltage Pin 7,8 input voltage Pin 11 input Current Pin 8 input Current Output power Withstand voltage Maximum allowable surface temperature Operating temperature range Storage temperature range Min. − Typ. − Max. 700 Unit V Conditions Io=1000mA 8.8 11.4 0 12 12.0 − 20 12.6 1000 V V mA DC, Io=1000mA *1 ∆Vr ∆VI ∆γ − − − 8 30 200 200 200 500 mV mV mVpp η 75 83 − % Refer to derating curve Vi=217 to 405V DC Io=1000mA Io=50 to 1000mA *2 6 Operation Range -30-20-10 0 10 20 30 40 50 60 70 80 90 Ambient Temperature Ta (°C) Switching Frequency *1: The operation starting voltage is between 15.5 and 17.5 V. *2: Pulse noise is not included. Pin No. 1 0 C4 C7 R2 4 6 7 + F1 C3 5 Vo1:12V/850mA + 9 C2 C1 GND1 Vo2:18V/100mA D5 + 3 D2 1 D3 R1 D7 + AC220V ZNR D1 T1 Vi(+) R5 C6 GND2 Vi(-) C5 Use a fuse for safety 8 7 11 2 1 BP5722A12 Terminal name 1 Vo 2 GND 6 Vi(-) 7 VDD 8 Vs 9 NC 11 VD Terminal function Secondary 12V output voltage control terminal. Insert a 1000µF output smoothing capacitor before the GND for use. Secondary 12V output GND terminal. Primary input negative terminal. Internal circuit power terminal. Start-up terminal. Connect to Vi (+) through an external resistor (1.5MΩ). NC pin. Drain terminal for the built-in FET. Verify proper operation under actual conditions before use. In particular, confirm that the load current does not exceed the maximum rating. 6 External Component Settings * C1: Output smoothing capacitor C2: Noise reduction capacitor * C3: Output smoothing capacitor C4: Input smoothing capacitor C5: Noise reduction capacitor C6: Output smoothing capacitor C7: Noise reduction capacitor D1: Rectifier Diode D2: Rectifier Diode Conversion Efficiency Conversion Efficiency η (%) Sample Application Circuit 100 90 80 70 60 50 40 30 20 10 0 0 500 1000 Output Current of Vo12 (mA) 1000µF/35V Low-impedance type 4700pF/400V or higher 10µF/50V Low-impedance type 33µF/450V Use if necessary 100µF/35V Low-impedance type Use if necessary Limiting element voltage DC 630V or higher 0.1 to 0.22µF 90V/6A 1kV/1A D3: D5: D7: R1: Rectifier Diode Rectifier Diode Diode Bridge Resistor * R2: Resistor R5: Noise reduction resistor T1: Switching Transformer F1: Fuse ZNR: Varistor 90V/0.13A 100V or higher /1A 800V/1A 100kΩ±5%, 3W Limiting element voltage 300V or higher 1.53MΩ±5%, 0.25W Limiting element voltage 600V or higher Use if necessary 1W or higher 10 to 22Ω Load Regulation Maximum Io=1000mA Be sure to use this for safety. A varistor is required to protect against lightning surges and static electricity. *C1, C3, R2:Refer to directions Operation Notes An excessively large capacitance at C1 may cause the output to become inactive. Therefore, a capacitance between 1000 and 2200µF is recommended, with a rise time of 10ms or less. The capacitance of C3 should be 10µF, since an excessively small value will result in malfunction. The activation time is defined as: t(sec)=R2�C3�ln[1-17/(VI-30µA�R2)], where VI is the DC voltage after smoothing. The resistance of R2 should be 1.5MΩ, since an excessively small value will result in malfunction. Overcurrent (reset type) and overvoltage (latch type) protection circuits are built in, preventing damage from occurring due to unexpected conditions. The overvoltage protection circuit shuts down operation once VDD exceeds 20V. In order to reset the input capacitor C4 must be discharged and the power turned back on. www.rohm.com ©2010 ROHM Co., Ltd. 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