BD81A04AMUV-M Datasheet, PDF (1/37 Pages) Rohm – 4ch White LED Driver with Buck-Boost and Built-in FET (32 LED Maximum)

Datasheet
4ch White LED Driver with Buck-Boost and
Built-in FET (32 LED Maximum)
BD81A04AMUV-M BD81A04AEFV-M
General Description
BD81A04AMUV-M/EFV-M is a white LED driver with the capability
of withstanding high input voltage (40V Max). This driver has 4ch
constant-current drivers integrated in 1-chip, where each channel
can draw up to 120mA (Max), which is also suitable for high
illumination LED drive. Furthermore, a buck-boost current mode
DC/DC controller is also integrated to achieve stable operation
during power voltage fluctuation. Light modulation (dimming
function) is possible by PWM input. The Nch MOSFET for power
surge is also integrated in the chip, thereby saving spaces of board
sets.
Key Specifications
˙ç Operating Input Voltage Range
˙ç Output LED Current Accuracy
˙ç DC/DC Oscillation Frequency
˙ç Operating Temperature Range
˙ç LED Maximum Output Current
4.5 to 35 V
±3.0%@50mA
200 to 2200kHz
-40 to +125℃
120mA/ch
Package
W(Typ) x D(Typ) x H(Max)
Features
˙ç Integrated Buck-Boost current mode DC/DC controller
˙ç Integrated 4ch current driver for LED drive
˙ç PWM light modulation (Dimming)-supported
˙ç External switching frequency synchronization
˙ç Built-In protection function (UVLO, OVP, OCP, SCP)
˙ç LED abnormality detection function (Open/Short)
˙ç Integrated V_OUT discharge function (Buck-Boost structure
limitation)
˙ç AEC-Q100 Qualified
Application
Audio Display, Small and Medium type LCD Panels for
Automotive use.
VQFN28SV5050
BD81A04AMUV-M
5.00mm x 5.00mm x 1.00mm
HTSSOP-B28
BD81A04AEFV-M
9.70mm x 6.40mm x 1.00mm
Application Circuit Diagram
C_IN
V_IN
(GND)
(GND)
(GND)
VREG
VCC
EN
VDISC
OVP
CS
BOOT
OUTH
SW
Vout
C_OUT
(DGND)
(DGND)
R_RT
(GND)
SYNC
RT
R_PC
C_PC
(GND)
C_SS
(GND)
COMP
SS
PWM
(DGND)
OUTL
BD81A04AMUV-M /
DGND
BD81A04AEFV-M
(DGND)
LED 1
LED 2
LED 3
LED 4
R_ISET
(GND)
(GND)
ISET
GND
SHDETEN
LEDEN 1
LEDEN 2
PGND
FAIL 1
(PGND)
FAIL 2
Figure 1. Buck-Boost Application Circuit
˓Product structureɿSilicon monolithic integrated circuitç ˓This product has no designed protection against radioactive rays
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