BD9207FPS-E2 データシートの表示（PDF） - ROHM Semiconductor
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BD9207FPS-E2 Datasheet PDF : 12 Pages
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BD9207FPS
Resistance R1
LED Current value is set below according to sense resistance R1.
ILED[A]＝VINV[V]/R1[Ω]
＝0.2V/R1[Ω]
Moreover, DCDC Output voltage will be the value below.
VO[V]＝VF（LED Forward voltage）＋VINV[V]
＝VF＋0.2V(typ)
● Recommended circuit example and notes of substrate layout
Technical Note
・ To prevent noise and low efficiency, please set up the capacitor and Schottky diode between VCC – GND as near as
possible to IC.
・ Please connect the resistance and output LC filter capacitor between INV – GND with same GND for the stability of
output voltage.
<Recommended parts example>
Coil
L1＝10μH
Diode
Capacitor
Resistance
D1
C1＝10μF(25V)
C2＝4.7μF(50V)
R1＝0.43Ω
：C6-K3LA（mitsumi）
：RB050LA-30（ROHM）
：Ceramic capacitor GRM31CB31E106KA75L(murata)
：Ceramic capacitor GRM32EB31H475KA87L(murata)
：MCR10EZPFR430（ROHM）
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© 2009 ROHM Co., Ltd. All rights reserved.
6/11
2009.07 - Rev.A
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