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BD81A34MUV-M

Part Number	BD81A34MUV-M
Manufacturer	Rohm
Description	4ch White LED Driver
Published	Jun 5, 2016
Detailed Description	Datasheet 4ch White LED Driver with Buck-Boost (32 LED Maximum) BD81A34MUV-M BD81A34EFV-M General Description BD81A34M...
Datasheet	BD81A34MUV-M PDF File

Overview

Datasheet 4ch White LED Driver with Buck-Boost (32 LED Maximum) BD81A34MUV-M BD81A34EFV-M General Description BD81A34MUV-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 (dimming function) is possible by PWM input.
Key Specifications Operating Input Voltage Range Output LED Current Accuracy DC/DC Oscillation Frequency Operating Temperature Range LED Maximum Output Current 4.
5 to 35 V ±3.
0%@50mA 200 to 2200kHz -40 to +125 120mA/ch Features Integrated Buck-Boost current mode DC/DC controller Integrated 4ch current driver for LED drive PWM light modulation (Dimming)-supported External switching frequency synchronization Built-In protection function (UVLO, OVP, OCP, SCP) LED abnormality detection function (Open/Short) Integrated VOUT discharge function (Buck-Boost structure limitation) AEC-Q100 Qualified Package(s) W(Typ) x D(Typ) x H(Max) VQFN28SV5050 HTSSOP-B28 (BD81A34MUV-M) (BD81A34EFV-M) W×L×H W×L×H 5.
0 ×5.
0 ×1.
0 9.
7 ×6.
4 ×1.
0 Application Audio Display , Navi , CID , Cluster , HUD Small and Medium type LCD Panels for Automotive use.
Application Circuit Diagram CIN Vin (GND) (GND) CREG (GND) VCC EN VREG VDISC SYNC RT RRT (GND) COMP RPC CPC (GND) SS CSS (GND) PWM BD81A34MUV-M ISET RISET (GND) GND (GND) LEDEN1 LEDEN2 Product structure Silicon monolithic integrated circuit This product has no designed protection against radioactive rays OVP FB CS FAIL1 BOOT OUTH SW (DGND) OUTL DGND (DGND) LED1 LED2 LED3 LED4 PGND (PGND) FAIL2 COUT (DGND) (DGND) (DGND) (DGND) Figure 1.
Buck-Boost Application Circuit www.
rohm.
com © 2014 ROHM Co.
, Ltd.
All rights reserved.
TSZ22111 14 001 ...

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