BD8381AEFV-M Datasheet, PDF (1/40 Pages) Rohm – LED Drivers for Automotive Light

Datasheet
LED Drivers for Automotive Light
BD8381AEFV-M
General Description
BD8381AEFV-M is a white LED driver with the
capability of withstanding high input voltage (50V MAX).
It has also an integrated current-mode, buck-boost
DC/DC controller to achieve stable operation against
high input voltage and to remove the constraint of the
number of LEDs in series connection.
The LED brightness is controlled by either linear or
PWM signal and is also possible to be controlled even
without using a microcomputer, but instead, by means
of the built-in PWM brightness signal generation circuit.
Key Specifications
 Input Supply Voltage Range:
 Operating Temperature Range:
5.0V to 30V
-40°C to +125°C
Package
W(Typ) x D(Typ) x H(Max)
Features
 Integrated buck-boost current-mode DC/DC
controller
 Built-in CR timer for PWM brightness
 PWM linear brightness
 Built-in protection functions (UVLO, OVP, TSD, OCP,
SCP)
 LED error status detection function (OPEN/
SHORT)
HTSSOP-B28
9.70mm x 6.40mm x 1.00mm
Applications
Headlight and Daytime Running Light etc.
Typical Application Circuit and Block Diagram
Vin
VREG
FAIL1
VCC
VREG
UVLO TSD
OVP
OCP
OVP
CS
EN
SYNC
RT
COMP
SS
VREG
INP1 INP2
THM
DRLIN
VREG
DISC
VTH
PWM
Timer
Latch
Control Logic
OSC ^SLOPE
PWM
OCP OVP
SS
ERR AMP
-
+
+
DRV
CTL
VREG
SHORT
Det
BOOT
OUTH
SW
DGND
OUTL
GND
LEDR
LEDC
PWMOUT
FB
CR
TIMER
OPEN/ SHORT/ SCP Detect
Timer
Latch
Open Det
SCP Det
FAIL2
PGND
CT
COUT
〇Product structure: Silicon monolithic integrated circuit
.www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
〇This product has no designed protection against radioactive rays
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TSZ02201-0T1T0C700160-1-2
31.Oct.2014 Rev.001