BD8372EFJ-M ROHM [Rohm], BD8372EFJ-M Datasheet - Page 13

• Manufacturer Part Number: BD8372EFJ-M
• Description: LED Drivers for Automotive Light
• Manufacturer: ROHM [Rohm]

●Protection function
BD8372HFP-M,BD8372EFJ-M
© 2011 ROHM Co., Ltd. All rights reserved.
www.rohm.com
As for this IC, short/open protection of external parts is built into, and it is possible to detect error with the terminal PUBS.
①LED open detecting function
②LED short detecting function
③ISET(H/L) open detecting function
④ISET(H/L) short detecting function
When LED connected with the terminal IOUT is opened, open
detection is done by the terminal IOUT becomes an overvoltage.
The terminal PBUS is made Low and it informs of error.
When LED connected with the terminal IOUT becomes short, it
detects short by the terminal IOUT becomes a low voltage.
The output current is turned off, the heat destruction of IC is
prevented, the terminal PBUS is made Low, and it informs of
error.
When the external resistance connected with the terminal ISET is
opened, open detection is done
The output current is turned off, PBUS is made Low, and it informs
of error. When it doesn't depend on the mode and either terminal
is opened, the terminal ISET is detected for H mode and for L
mode though it exists by two terminals.
When the external resistance connected with the terminal ISET
becomes short, it detects short
The output is turned off, the overcurrent is prevented,PBUS is
made Low, and it informs of error.
When it doesn't depend on the mode and either terminal becomes
short, the terminal ISET is detected for H mode and for L mode
though it exists by two terminals.
13/16
+B
+B
+B
PBUS
PBUS
PBUS
VIN
VIN
VIN
OFF control
0.05V
Current
Current
Control
Technical Note
Control
Current
Control
2011.04 - Rev.A
0.6V
×
4.3V
ISET
OFF
OFF
OFF
ISET
IOUT
IOUT
IOUT
Short
Short