BD8381EFV-M Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Fabricante

BD8381EFV-M

LED Drivers for Automotive Light

ROHM Semiconductor 

BD8381EFV-M

●Procedure for external components selection

Follow the steps as shown below for selecting the external components

1. Work out IL_MAX from the operating conditions.

2. Select the value of RSC such that IOCP > IL_MAX

3.

Select

the

value

of

L

such

that

0.05[V/µs]

<

Vout

L

*RCS < 0.3[V/ µs]

4. Select coil, schottky diodes, MOSFET and RCS which meet with the ratings

5. Select the output capacitor which meets with the ripple voltage requirements

6. Select the input capacitor

7. Work on with the compensation circuit

8. Work on with the Over-Voltage Protection (OVP) setting

9. Work on with the soft-start setting

10. Verify experimentally

Technical Note

Feedback the value of L

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© 2011 ROHM Co., Ltd. All rights reserved.

11/20

2011.04 - Rev.A

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