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BD9130NV Datasheet(PDF) 5 Page - Rohm |
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BD9130NV Datasheet(HTML) 5 Page - Rohm |
5 / 15 page BD9130NV Technical Note 5/14 www.rohm.com 2009.05 - Rev.A © 2009 ROHM Co., Ltd. All rights reserved. ● 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.18 Comparison of transient response Advantage 2: Offers high efficiency for all load range. ・ For lighter load: Utilizes the current mode control mode called SLLM TM for lighter load, which reduces various dissipation such as switching dissipation (PSW), gate charge/discharge dissipation, ESR dissipation of output capacitor (PESR) and on-resistance dissipation (PRON) that may otherwise cause degradation in efficiency for lighter load. Achieves efficiency improvement for lighter load. ・ For heavier load: Utilizes the synchronous rectifying mode and the low on-resistance MOS FETs incorporated as power transistor. ON resistance of P-channel MOS FET : 200mΩ(Typ.) ON resistance of N-channel MOS FET : 160mΩ(Typ.) Achieves efficiency improvement for heavier load. Offers high efficiency for all load range with the improvements mentioned above. Advantage 3:・Supplied in smaller package due to small-sized power MOS FET incorporated. Reduces a mounting area required. Fig.20 Example application DC/DC Convertor Controller RITH L Co VOUT CITH VCC Cin 10mm 15mm RITH CITH CIN CO L Fig.19 Efficiency VOUT IOUT VOUT IOUT 110mV Conventional product (Load response IO=0.1A→0.6A) BD9139NV (Load response IO=1A→2A) ・ Output capacitor Co required for current mode control: 22μF ceramic capacitor ・ Inductance L required for the operating frequency of 1 MHz: 2.2μH inductor (BD9130NV:Co=22μF, L=2.2μH) 0.001 0.01 0.1 1 0 50 100 ① ② PWM SLLM TM ① inprovement by SLLM TM system ② improvement by synchronous rectifier Output current Io[A] 29mV |
Similar Part No. - BD9130NV_09 |
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Similar Description - BD9130NV_09 |
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