BD8381EFV-M Datasheet, PDF (1/21 Pages) Rohm – LED Drivers for Automotive Light

Power Management ICs for Automotive Body Control
LED Drivers
for Automotive Light
BD8381EFV-M
No.11039EAT14
●Description
BD8381EFV-M is a white LED driver with the capability of withstanding high input voltage (50V MAX).
A current-mode buck-boost DC/DC controller is also integrated to achieve stable operation against voltage input and also to
remove the constraint of the number of LEDs in series connection.
The brightness can be controlled by either PWM or DC. The PWM brightness signal generation circuit is built into, and the
control without microcomputer is also possible.
●Features
1) Input voltage range 5.0 – 30 V
2) Integrated buck-boost current-mode DC/DC controller
3) Built-in CR timer for PWM brightness
4) PWM linear brightness
5) Built-in protection functions (UVLO, OVP, TSD, OCP, SCP)
6) LED error status detection function (OPEN/ SHORT)
7) HTSSOP-B28 package
●Applications
Headlight and running (DRL) of night of daylight, etc.
●Absolute maximum ratings (Ta=25℃)
Parameter
Symbol
Ratings
Unit
Power supply voltage
VCC
50
V
BOOT Voltage
VBOOT
55
V
SW,CS,OUTH Voltage
VSW, VCS, VOUTH
50
V
BOOT-SW Voltage
VBOOT-SW
7
V
VREG,OVP,OUTL,FAIL1,FAIL2,THM,SS,
COMP,RT,SYNC,EN,DISC,VTH,FB,LEDR,
LEDC,DRLIN, PWMOUT,CT Voltage
Power Consumption
V_VREG,V_OVP,V_OUTL,V_FAIL1,V_FAIL2,V_THM,V_SS,
V_COMP,V_RT,V_SYNCV_EN,V_DISC,V_VTH,V_FB,V_LEDR, -0.3～7 < VCC
V
V_LEDC, ,V_DRLIN,V_PWMOUT V_CT
Pd
1.45^※1
W
Operating temperature range
Topr
-40～+125
℃
Storage temperature range
Tstg
-55～+150
℃
Junction temperature
Tjmax
150
℃
※1 IC mounted on glass epoxy board measuring 70mm×70mm×1.6mm, power dissipated at a rate of 11.6mW/℃ at temperatures above 25℃.
※2 A radiation is not designed.
●Operating conditions (Ta=25℃)
Parameter
Symbol
Ratings
Power supply voltage
VCC
5.0～30
Oscillating frequency range
External synchronization frequency range ^{※3 ※4}
FOSC
FSYNC
200～600
fosc～600
External synchronization pulse duty range
FSDUTY
40～60
※3 Connect SYNC to GND or OPEN when not using external frequency synchronization.
※4 Do not switch between internal and external synchronization when an external synchronization signal is input to the device.
Unit
V
kHz
kHz
%
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2011.04 - Rev.A