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BD81A24MUV-M Datasheet(PDF) 1 Page - Rohm |
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BD81A24MUV-M Datasheet(HTML) 1 Page - Rohm |
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1 / 40 page  1/36 TSZ02201-0T3T0C600070-1-2 © 2016 ROHM Co., Ltd. All rights reserved. 2016.10.19 Rev.003 www.rohm.com TSZ22111・15・001 4ch White LED Driver with Buck-Boost (40 LED Maximum) BD81A24MUV-M / BD81A24EFV-M General Description BD81A24MUV-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. 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 Application For Display audio, CID, Cluster, HUD Small and Medium type LCD Panels for Automotive use. Key Specifications ■ Operating Input Voltage Range ■ Output LED Current Accuracy ■ DC/DC Oscillation Frequency ■ Operating Temperature Range ■ LED Maximum Output Current ■ PWM Min Pulse Width 4.5 to 35 V ±3.0%@50mA 200 to 2200kHz -40 to +125°C 120mA/ch 1.0µs Package(s) W(Typ) x D(Typ) x H(Max) VQFN28SV5050 HTSSOP-B28 (BD81A24MUV-M) (BD81A24EFV-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 Typical Application Circuit ○ Product structure: Silicon monolithic integrated circuit ○ This product has no designed protection against radioactive rays BD81A24MUV-M / BD81A24EFV-M CIN VCC CREG VREG VCC EN VDISC OVP CS BOOT OUTH SW OUTL COUT DGND LED1 LED2 LED3 LED4 PGND FAIL2 SYNC RT RRT COMP RPC CPC SS CSS PWM ISET RISET GND SHDETEN LEDEN1 LEDEN2 FAIL1 VREG Figure 1. Buck-Boost Application Circuit Datasheet |
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