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BD6067GU Datasheet(PDF) 10 Page - Rohm |
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BD6067GU Datasheet(HTML) 10 Page - Rohm |
10 / 17 page BD6067GU 10/14 Datasheet Datasheet TSZ02201-0G3G0C200080-1-2 © 2012 ROHM Co., Ltd. All rights reserved. 5.OCT.2012 Rev.001 www.rohm.com TSZ22111・15・001 ●External components Selection Method <<Constants in the standard circuit example>> R1: Determines the LED current ILED at power ON. <Recommended parts> ILED (mA) R1[Ω] 5 39 15 13 20 10 L1: Coil for boost. The recommended value is 22µH. be sure to use a sufficient DC current permissible value and a sufficient low DC resistance coil. <Recommended parts> Inductance value Model number/manufacturer 22µH NR3015T220M / TAIYO YUDEN CIN: Bypass capacitor of power supply. This capacitor must be provided to remove an instantaneous power supply noise for stable voltage supply to this IC. To obtain good characteristics, the low ESR parts like the ceramics capacitor must be used. The recommended capacitance is 1µF or more. <Recommended parts> Capacitance value Model number/manufacturer 1.0µF GRM188B11A105KA61B / MURATA COUT: Output smoothing capacitor. The capacitance recommended for BD6067GU is 1.0µF. <Recommended parts> Capacitance value Model number/manufacturer 1.0µF UMK107C105KA-B / TAIYO YUDEN When selecting capacitors for CIN and COUT, special care should be taken for rated voltage. The desirable rated voltage is about double the voltage actually applied to the capacitor. When the margin for rated voltage is not sufficient, the capacitance may be a half or less of the nominal value. D1: Schottky barrier diode (SBD) for output rectification. To achieve high conversion efficiency, use a diode characterized by of low Vf, low reverse leak and high current capacity. <Recommended parts> Model number/manufacturer RB160M-40 / ROHM ●Recommended PCB layout When a PCB designed, the power supply line should be wired in a way that the board impedance can be minimized. If necessary, the bypass capacitor must be connected. In particular, pins around the DC/DC converter must be wired in such a way that the wiring impedance can be minimized. In addition, when a DC/DC converter using a coil is used, it is necessary to place the output capacitor COUT, coil L1, rectification diode D1 and bypass capacitor CIN near this IC and keep the GND impedance low. Figure 18. PCB Layout Image GNDA EN VDAC VIN VFB VOUT SW GND CIN COUT To battery GND R1 To cell voltage source L1 D1 |
Similar Part No. - BD6067GU_12 |
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Similar Description - BD6067GU_12 |
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