BD81A34MUV-M Datasheet | ROHM

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 120m A (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%@50m A 200 to 2200k Hz -40 to +125 120m A/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) VREG VDISC SYNC...