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Rohm BD7693FJ User Manual

Flyback type high power factor ac/dc converter
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Flyback Type High Power Factor
AC/DC Converter
Isolated 35 V 1.2 A
(BD7693FJ Evaluation Board)

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Summary of Contents for Rohm BD7693FJ

  • Page 1 Flyback Type High Power Factor AC/DC Converter Isolated 35 V 1.2 A (BD7693FJ Evaluation Board)

  • Page 2: High Voltage Safety Precautions

    [8] Be sure to wear insulated gloves when handling is required during operation. After Use [9] The ROHM Evaluation Board contains the circuits which store the high voltage. Since it stores the charges even after the connected power circuits are cut, please discharge the electricity after using it, and please deal with it after confirming such electric discharge.
  • Page 3 This evaluation board can output a voltage of 35 V isolated from an input of 90 Vac to 264 Vac, and the maximum output current is 1.2 A. The one-converter flyback type achieves a high power factor (PF > 0.9). The control IC uses BD7693FJ,which use the critical mode. Switching loss and noise are reduced by zero current detection.

  • Page 4: Performance Specification

    (Note 1) Adjust the load application time so that the component surface temperature does not exceed 105 °C. (Note 2) Not include spikes noise. Derating Figure 2. Temperature derating curve © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 2/16 APR.2022...

  • Page 5: Operation Procedure

    (4) AC power supply switch is ON. (5) Check that output voltage is 35 V. (6) Electronic load switch is ON. CN1-2 AC (N) CN1-2 AC (L) 35Ｖ Figure 3. Diagram of How to Connect © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 3/16 APR.2022...

  • Page 6: Application Circuit

    Operates in critical mode. The output (35 V) voltage is monitored by a feedback circuit and fed back to the EO pin of BD7693FJ through a opto-coupler. At startup, the voltage from the emitter pin of Q2 to the VCC pin is supplied through the startup circuit, and the voltage at the VCC pin rises.
  • Page 7 Stable MOSFET Gate Driving SOP-J8 4.90 mm x 6.00 mm x 1.65 mm  Soft Start Function Pitch 1.27 mm Figure 5. Block Diagram Table 1. BD7693FJ PIN description ESD Diode Pin No. Pin Name Function Feedback input pin ○...

  • Page 8: Measurement Data

    Load Regulation Figure 7. Efficiency vs Output Current Figure 6. Output Voltage vs Output Current Line Regulation Figure 8. Output Voltage vs Input Voltage Figure 9. Efficiency vs Input Voltage © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 6/16 APR.2022...
  • Page 9 User’s Guide BD7693FJ-EVK-002 Measurement Data – continued PF (Power Factor) Figure 10. PF vs Input Voltage Total Harmonic Distortion of input current Figure 11. THD vs Input Voltage © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 7/16 APR.2022...
  • Page 10 = 230 Vac, I = 1.2 A Figure 15. Harmonic current V = 230 Vac, I = 1.2 A Figure 14. Harmonic current V = 100 Vac, I = 1.2 A © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 8/16 APR.2022...
  • Page 11 1 A / Div Input Current Iin 1 A/ Div Figure 18. V = 90 Vac, I = 1.2 A Figure 19. V = 264 Vac, I = 1.2 A © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 9/16 APR.2022...
  • Page 12 Table 2. Surface Temperature of Parts (Ta = 22 °C) Condition Part = 90 Vac, I = 1.2 A = 264 Vac, I = 1.2 A 57.1 °C 48.5 °C 64.0 °C 43.6 °C © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 10/16 APR.2022...
  • Page 13 Figure 22. V : 115 Vac / 60 Hz, I : 1.2 A QP margin: 8.7dB AVE margin: 15.1dB Figure 23. V : 230 Vac / 50 Hz, I : 1.2 A © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 11/16 APR.2022...
  • Page 14 BD7693FJ-EVK-002 User’s Guide Schematics = 90 Vac to 264 Vac、V = 35 V 1.2 A Figure 24. BD7693FJ-EVK-002 Schematics © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 12/16 APR.2022...

  • Page 15: Parts List

    ALPHA TP1,TP2 CD-10-15 MAC8 Zener Diode, 16 V UDZVTE-1716B ROHM Zener Diode, 24 V UDZVTE-1724B ROHM Jumper P-43MC 3×8 YAWATANEJI P-43MC 3×8 YAWATANEJI PCB0236D Materials may be changed without notifying. © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 13/16 APR.2022...
  • Page 16 User’s Guide BD7693FJ-EVK-002 Layout Size: 160 mm x 55 mm Figure 25. TOP Silkscreen (Top view) Figure 26. Bottom Layout (Top View) © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 14/16 APR.2022...
  • Page 17 2UEW / Φ0.35 x 1 COMPACT 2UEW / Φ0.40 x 2 COMPACT 2UEW / Φ0.20 x 1 COMPACT 2UEW / Φ0.40 x 2 COMPACT 2UEW / Φ0.35 x 1 COMPACT © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 15/16 APR.2022...

  • Page 18: Revision History

    BD7693FJ-EVK-002 User’s Guide Revision History Date Rev. Changes 18.April.2022 New Release © 2022 ROHM Co., Ltd. No. 64UG141E Rev.001 16/16 APR.2022...
  • Page 19 Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM or any other parties. ROHM shall have no responsibility whatsoever for any dispute arising out of the use of such technical information.

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Bd7693fj-evk-002Bd7693fj-evk-001

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