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Rohm BM2P141X User Manual

Ac/dc converter, non-isolation buck converter, pwm method 10 w 14 v, reference board
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AC/DC Converter
Non-Isolation Buck Converter
PWM method 10 W 14 V
BM2P141X Reference Board

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Summary of Contents for Rohm BM2P141X

  • Page 1 AC/DC Converter Non-Isolation Buck Converter PWM method 10 W 14 V BM2P141X Reference Board...
  • Page 2 [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 BM2P141X-EVK-001 The BM2P141X-EVK-001 evaluation board outputs 14 V voltage from the input of 90 Vac to 264 Vac. The output current supplies up to 0.715 A. The BM2P141X which is PWM method DC/DC converter IC built-in 650 V MOSFET is used.
  • Page 4 Maximum Output Power Po of this reference board is 10.0 W. The derating curve is shown on the right. If ambient temperature is over 40° C, Please adjust load continuous time by over 105 ° C of any parts surface temperature. © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001...

  • Page 5: Application Circuit

    = 14 V Figure 4. BM2P141X-EVK-001 Application Circuit The BM2P141X is non-insulation method without opto-coupler and feeds back the VCC voltage to 14.0 V typ. This VCC voltage is the voltage between the VCC pin and the GND_IC pin. The output voltage VOUT is defined by the following equation.
  • Page 6 Soft Start function W(Typ) x D(Typ) x H(Max) DIP7K 9.20 mm x 6.35 mm x 4.30 mm Pitch 2.54 mm Figure 6. Block Diagram Figure 7. DIP7K Package Table 1. BM2P141X PIN description ESD Diode Name Function GND_IC DRAIN MOSEFET DRAIN...
  • Page 7 Figure 8. Coil current waveform at OCP detection From the minimum switching frequency f (Min) = 60 kHz, Calculate on time ton (Max) [ sec] Calculate L value to operate in discontinuous mode. [ H] © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 8 VIN (Max): 380 V, the maximum load current Io (Max): 0.715 A, and the switching frequency is 60 kHz at the minimum.The ripple current Iripple of the coil is given by the following formula. © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001...
  • Page 9 Rectifier diodes are used for diodes to supply VCC. The reverse voltage applied to the diode is V (Max): 380 V. Consider the derating and select 600 V diode Because the current flowing to the IC is small enough, we use the 0.2 A / 600 V RRE02VSM6S. © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 10 , and the design value of output ripple voltage is less than 100 mV. [mV] Next, check whether the ripple current of the capacitor satisfies the rated ripple current. Inductor ripple current RMS conversion, The ripple current of the capacitor, © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 11 5.1 Discharge Resistor : R1,R2,R3 The resistor is for discharging X - Capacitor (C1). Considering withstand voltage, 3 pcs of chip resistance of ROHM product MCR18 (200 V withstand voltage) are connected in series. 220 k is used in 3 pcs in series so that it becomes 45 V or less after 1 second after turning off the power supply.
  • Page 12 = 90 Vac =115 Vac =230 Vac =264 Vac Output Current [mA] Output Current [mA] Figure 10. Load Regulation (I vs. P Figure 11. Load Regulation (I vs. P LOSS LOSS © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 13 Performance Data -Continued Table 4. Load Regulation : V =90 Vac Table 5. Load Regulation: V =100 Vac Table 6. Load Regulation: V =115 Vac Table 7. Load Regulation: V =176 Vac © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 14 User’s Guide Performance Data -Continued Table 8. Load Regulation : V =230 Vac Table 9. Load Regulation: V =264 Vac © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 15 100 200 300 400 500 600 700 800 100 200 300 400 500 600 700 800 Output Current [mA] Output Current [mA] Figure 14. Switching Frequency (I vs. F Figure 15. Coil Peak Current (I vs. Ipeak) © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 16 = 264 Vac, I = 0.715 A MOSFET V Diode VAnode-Cathode Diode I MOSFET IDrain Figure 20. MOSFET V = 264 Vac, Output Short Figure 21. Diode V = 264 Vac, Output Short © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 17 = 115 Vac, I = 0.715 A 10 mA Figure 26. V = 230 Vac, I = 10 mA 0.715 A Figure 27. V = 230 Vac, I = 0.715 A 10 mA © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 18 = 0.5 A Figure 31. V = 230 Vac, I = 0.5 A Figure 32. V = 115 Vac, I = 0.715 A Figure 33. V = 230 Vac, I = 0.715 A © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 19 = 110 Vac / 60 Hz, I = 0.715 A Figure 37. V = 230 Vac / 50 Hz, I = 0.715 A QP margin = 6.6 dB QP margin = 6.0 dB © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...

  • Page 20: Bill Of Materials

    User’s Guide Schematics = 90 264 Vac, V = 14 V Figure 38. BM2P141X-EVK-001 Schematics Bill of Materials Table 11. BoM of BM2P141X-EVK-001 © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 21 User’s Guide Size : 91 mm x 30 mm Figure 39. Top Silkscreen (Top view) Figure 40. Bottom Layout (Top view) © 2019 ROHM Co., Ltd. No. 61UG024E Rev.001 2019.1...
  • Page 22 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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