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BD8963EFJ-E2 Datasheet(PDF) 5 Page - Rohm |
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BD8963EFJ-E2 Datasheet(HTML) 5 Page - Rohm |
5 / 18 page Technical Note 5/17 www.rohm.com 2010.06 - Rev.A © 2010 ROHM Co., Ltd. All rights reserved. BD8963EFJ ● Information on advantages Advantage 1 : Offers fast transient response with current mode control system. Voltage drop due to sudden change in load was reduced by about 50%. Fig.17 Comparison of transient response Advantage 2 : Offers high efficiency with synchronous rectifier Utilizes the synchronous rectifying mode and the low on-resistance MOS FETs incorporated as power transistor. ON resistance of P-channel MOS FET : 145mΩ(Typ.) ON resistance of N-channel MOS FET : 80mΩ(Typ.) Advantage 3 :・Supplied in smaller package due to small-sized power MOS FET incorporated. Reduces a mounting area required. Fig.19 Example application DC/DC Convertor Controller RCOMP L Co VOUT CCOMP VCC Cin 10mm 15mm RCOMP CCOMP CIN CO L ・ Output capacitor Co required for current mode control: 10μF ceramic capacitor ・ Inductance L required for the operating frequency of 1 MHz: 1.5μH inductor Conventional product (Load response IO= 0.5A→1.5A) BD8963EFJ (Load response IO= 0.5A→1.5A) VOUT IOUT VOUT IOUT 75mV 36mV Fig.18 Efficiency 0 10 20 30 40 50 60 70 80 90 100 10 100 1000 10000 OUTPUT CURRENT:IOUT[mA] VCC=5.0V Ta=25℃ 【 VOUT=1.1V】 |
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