Rohm BM2P141X User Manual Download

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AC/DC Converter

Non-Isolation Buck Converter

PWM method 10 W 14 V

BM2P141X Reference Board

Summary of Contents for BM2P141X

Page 1: ...AC DC Converter Non Isolation Buck Converter PWM method 10 W 14 V BM2P141X Reference Board...

Page 2: ...contact or even bringing your hand close to the board may result in discharge and lead to severe injury or death Therefore DO NOT touch the board with your bare hands or bring them too close to the b...

Page 3: ...tching frequency is 65 kHz in fixed mode At light load frequency is reduced and high efficiency is realized Built in frequency hopping function contributes to low EMI Low on resistance 1 5 650 V MOSFE...

Page 4: ...power meter connect between AC power supply and board 6 Output test equipment connects to output terminal 7 AC power supply switch ON 8 Check that output voltage is 14 V 9 Electronic load switch ON 10...

Page 5: ...l Voltage VFD1 Forward Voltage of diode D1 VFD2 Forward Voltage of diode D2 Figure 5 General Buck converter application circuit Compared to the general Buck converter as shown above the number of part...

Page 6: ...iter Soft Start function Key specifications Operation Voltage Range VCC 12 00 V 15 12 V DRAIN 650 V Max Circuit Current ON 0 85 mA Typ Circuit Current Burst mode 0 45 mA Typ Switching Frequency 65 kHz...

Page 7: ...he diode flows which leads to an increase in power loss of diode Furthermore this reverse current becomes the peak current when the MOSFET is ON and the power loss of the MOSFET also increases The con...

Page 8: ...is obtained by setting the current slope at switching ON to IL Calculate the output current Io LIM at overcurrent detection by securing a margin of 10 from the maximum load current of 715 mA and setti...

Page 9: ...when the output voltage at startup is 0 V Consider the derating and select 600 V diode The condition where the effective current of the diode is maximized is when the input voltage is the maximum volt...

Page 10: ...r C7 C8 For the output capacitor select output voltage VO of 25 V or more in consideration of derating For C7 electrolytic capacitors capacitance impedance and rated ripple current must be taken into...

Page 11: ...t voltage the output voltage increases at light load This board uses bleeder resistance for its improvement Reducing the resistance value improves the rise in the output voltage of the light load but...

Page 12: ...V 83 36 715 mA 13 665 V 84 01 Figure 10 Load Regulation IOUT vs PLOSS Figure 11 Load Regulation IOUT vs PLOSS 12 6 12 8 13 0 13 2 13 4 13 6 13 8 14 0 14 2 14 4 14 6 14 8 15 0 15 2 15 4 0 500 1000 150...

Page 13: ...3 1 662 85 48 100 12 86 13 679 800 10 943 1 914 85 11 100 16 17 13 663 1000 13 663 2 511 84 48 100 19 55 13 649 1200 16 379 3 167 83 80 100 20 37 13 630 1250 17 038 3 330 83 65 100 0 08 0 000 1260 0 0...

Page 14: ...13 663 800 10 930 2 300 82 62 230 16 83 13 646 1000 13 646 3 184 81 08 230 20 47 13 638 1200 16 366 4 104 79 95 230 24 02 13 583 1390 18 880 5 140 78 60 230 0 25 0 000 1400 0 000 0 250 0 00 VIN Vac P...

Page 15: ...0 15 2 15 4 80 100 120 140 160 180 200 220 240 260 280 Output Voltage V Input Voltage Vac IOUT 10 mA IOUT 100 mA IOUT 500 mA IOUT 715 mA 0 10 20 30 40 50 60 70 80 90 100 80 100 120 140 160 180 200 22...

Page 16: ...igure 17 Diode VIN 90 Vac IOUT 0 715 A Figure 18 MOSFET VIN 264 Vac IOUT 0 715 A Figure 19 Diode VIN 264 Vac IOUT 0 715 A Figure 20 MOSFET VIN 264 Vac Output Short Figure 21 Diode VIN 264 Vac Output S...

Page 17: ...nued Power ON Figure 22 VIN 115 Vac IOUT 0 715 A Figure 23 VIN 230 Vac IOUT 0 715 A Dynamic Response Figure 24 VIN 115 Vac IOUT 10 mA 0 715 A Figure 25 VIN 115 Vac IOUT 0 715 A 10 mA Figure 26 VIN 230...

Page 18: ...Performance Data Continued Output Ripple Voltage Figure 28 VIN 115 Vac IOUT 10 mA Figure 29 VIN 230 Vac IOUT 10 mA Figure 30 VIN 115 Vac IOUT 0 5 A Figure 31 VIN 230 Vac IOUT 0 5 A Figure 32 VIN 115...

Page 19: ...264 Vac IOUT 0 715 A IC1 50 4 C 67 3 C 51 8 C 64 9 C D1 61 5 C 76 9 C 64 3 C 77 5 C DB1 49 6 C 54 8 C 44 1 C 46 0 C L1 49 8 C 61 8 C 47 6 C 62 5 C EMI Conducted Emission CISPR22 Pub 22 Class B Figure...

Page 20: ...7225KL T Taiyo Yuden 3216 1206 C7 1 Electrolytic 680uF 25V 20 UPA1E681MPD Nichicon 10mm X16mm C8 1 Ceramic 0 1 F 100V X7R 10 HMK107B7104MA T Taiyo Yuden 1608 0603 CN1 1 Connector 2pin 5mm pitch B2P NV...

Page 21: ...19 20 2019 ROHM Co Ltd No 61UG024E Rev 002 Jul 2021 User s Guide BM2P141X EVK 001 PCB Size 91 mm x 30 mm Figure 39 Top Silkscreen Top view Figure 40 Bottom Layout Top view...

Page 22: ...20 20 2019 ROHM Co Ltd No 61UG024E Rev 002 Jul 2021 User s Guide BM2P141X EVK 001 Revision History Date Rev Changes Jul 2019 001 New Release Jul 2021 002 P6 correct L formula and result...

Page 23: ...hnical information The Products specified in this document are not designed to be radiation tolerant For use of our Products in applications requiring a high degree of reliability as exemplified below...