BD8105FV Просмотр технического описания (PDF) - ROHM Semiconductor

Номер в каталоге

Компоненты Описание

производитель

BD8105FV

Power Management IC Series for Automotive Body Control(LED Driver)

ROHM Semiconductor 

BD8105FV

Technical Note

3）Enable Signal

By applying voltage at least VCC×0.8 or more to the SDWN terminal, D0 (16 pin)~D11 (4 pin) become open forcibly.

At this time, the temperature protection circuit (TSD) stops. D11～D0 become PWM operation by inputting PWM to

SDWN(3 pin).

4）SEROUT

A cascade connection can be made (connecting at least 2 or more IC’s in serial).

Serial signal input from SERIN is transferred into receiver IC by the fall edge of the CLK signal.

Since this functionality gives enough margins for the setup time prior to the rise edge of the CLK signal on the receiver

IC (using the exact same CLK signal of sender IC), the application reliability can be improved as cascade connection

functionality.

LATCH

SERIN

CLK

SEROUT

d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0

1 2 3 4 5 6 7 8 9 10 11 12 13

D11

Fig.14

●Cascade Connection

By using (at least) 2 ICs, each IC’s D11~D0, at (at least) 24ch, can be controlled by the 24-bit SERIN signal. The serial

data input to the sender IC can be transferred to the receiver IC by inputting 12CLK to the CLK terminal.

LATCH

SERIN

CLK

Send side IC

Receive side IC

d23 d22 d21 d20 d19 d18 d17 d16 d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Fig.15

www.rohm.com

© 2009 ROHM Co., Ltd. All rights reserved.

7/12

2009.07 - Rev.B

Share Link: