BD81A44MUV-M Datasheet, PDF (1/39 Pages) Rohm – 4ch White LED Driver with Buck-Boost

Datasheet
4ch White LED Driver with Buck-Boost
(40 LED Maximum)
BD81A44MUV-M / BD81A44EFV-M
General Description
BD81A44MUV-M/EFV-M is a white LED driver with the capability of
withstanding high input voltage (35V 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 (5000:1 dimming
function) is possible by PWM input.
Key Specifications
■ Operating Input Voltage Range
4.5 to 35 V
■ Output LED Current Accuracy ±3.0%@50mA
■ DC/DC Oscillation Frequency 200 to 2200kHz
■ Operating Temperature Range -40 to +125℃
■ LED Maximum Output Current
120mA/ch
■ PWM min pulse width
1.0us
Features
■ Integrated Buck-Boost current mode DC/DC controller
■ Integrated 4ch current driver for LED drive
■ 5000:1 PWM dimming @200Hz
■ External switching frequency synchronization
■ Built-In protection function (UVLO, OVP, OCP, SCP)
■ LED abnormality detection function (Open/Short)
■ Integrated VOUT discharge function (Buck-Boost or Buck
structure limitation)
■ AEC-Q100 Qualified ^{(Note 1)}
(Note 1) Grade1
Package(s) W(Typ) x D(Typ) x H(Max)
VQFN28SV5050
(BD81A44MUV-M)
HTSSOP-B28
(BD81A44EFV-M)
W(Typ) × D(Typ) × H(Max) W(Typ) × D(Typ) × H(Max)
5.0mm × 5.0mm ×1.0mm 9.7mm × 6.4mm × 1.0mm
Application
For Display audio, CID, Cluster, HUD
Small and Medium type LCD Panels for Automotive use.
Typical Application Circuit
VCC CIN
VCC
CREG
VREG
EN
VDISC
SYNC
RT
RRT
COMP
RPC
CPC
SS
CSS
BD81A44MUV-M /
BD81A44EFV-M
PWM
ISET
RISET
GND
OVP
CS
BOOT
OUTH
SW
OUTL
DGND
LED1
LED2
LED3
LED4
PGND
FAIL1
FAIL2
SHDETEN
LEDEN1
LEDEN2
Figure 1. Buck-Boost Application Circuit
○Product structure：Silicon monolithic integrated circuit
○This product has no designed protection against radioactive rays
COUT
VREG
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TSZ02201-0T3T0C600060-1-2
2016.10.19 Rev.003