BD8381EFV-E2 Rohm Semiconductor, BD8381EFV-E2 Datasheet - Page 11
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BD8381EFV-E2
Manufacturer Part Number
BD8381EFV-E2
Description
LED Drivers AUTOMOTIVE GRADE LED DRIVER
Manufacturer
Rohm Semiconductor
Datasheet
1.BD8381EFV-E2.pdf
(21 pages)
Specifications of BD8381EFV-E2
Operating Supply Voltage
5 V to 30 V
Maximum Supply Current
7 mA
Maximum Power Dissipation
1.45 W
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Package / Case
HTSSOP-28
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
BD8381EFV-E2
Manufacturer:
ROHM Semiconductor
Quantity:
135
●Operation in error circumstances of LED
① LED open detection
②LED short detection
③ LED anode/cathode land GND short detection
© 2010 ROHM Co., Ltd. All rights reserved.
BD8381EFV-M
www.rohm.com
PWMOUT
PWMOUT
OUTH
OUTL
OUTH
OUTL
SW
FB
SW
PWMOUT
OUTH
OUTL
SW
VCC
VCC
Fig.17
Fig.18
Fig.19
VCC
VOUT
VOUT
VOUT
Q1
Short
Q1
RSENSE
OPEN
RSENSE
1
N
11/20
Q1
RSENSE
Short
to GND
N
1
FB
OUTH/OUTL
VOUT/OVP
FAIL2
LEDR
VOUT
FB
OUTH/OUTL
FAIL2
1
VOUT
LEDR-LEDC
0V
OUTH/OUTL
FAIL2
It detects short, and after the timer of △T, error
is detected with FAIL2.
200mV
LED open detection when VOVP≧1.7 and VFB≦50mV
(When it achieves the detection condition, the FP latch is done. )
50mV
It detects short, and after the timer of △T,
error is detected with FAIL2.
LED OPEN
Capacity dependence connected with CT
LED anode GND short
△T=32770×
0V
0V
0.2V
50mV
1.7V
Switching Duty extends.
Switching stop
fosc
It gets down by LED1 step.
fosc
1
Switching stop
Timer operation of CT after GND
short detection.
FAIL1 becomes Hi→Low.
Switching stop
0V
2010.10 - Rev.0.11
Technical Note