4ch White LED Driver Built-in Current Driver Buck-Boost and Boost DC/DC Controller for Automotive - BD81A74MUV-M (New)

BD81A74MUV-M is a white LED driver with the capability of withstanding high input voltage (maximum 35V). This driver has 4ch constant-current drivers in 1-chip, where each channel can draw up to 120mA (Max), and it is suitable for high illumination LED drive. Furthermore, a buck-boost current mode DC/DC controller is also built to achieve stable operation during power voltage fluctuation. Light modulation (5000:1 dimming function) is possible by PWM input.

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Part number
Unit Quantity
Minimum Package Quantity
Packing Type
BD81A74MUV-ME2 Active VQFN28SV5050 2500 2500 Taping Yes
Topology Buck-Boost
Number of Outputs 4
Vin(Min.)[V] 4.5
Vin(Max.)[V] 35.0
Output Current(Max.)[mA] 480.0
Vout(Max.)[V] 40.0
Frequency(Max.)[MHz] 2.2
LED Configuration 4
Integrated FET No
Dimming PWM
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 125
    • AEC-Q100 Qualified(Grade 1)
    • 4ch Current Driver for LED Drive
    • Buck-Boost Current Mode DC/DC Controller
    • Control DC/DC Converter Oscillation Frequency by External Synchronized Signal
    • Spread Spectrum Function
    • LSI Protection Function (UVLO, OVP, TSD, OCP, SCP)
    • LED Abnormality Detection Function (Open/Short)
    • VOUT Discharge Function (Buck-Boost Structure Limitation)
ROHM Semiconductor reserves the right to change the specifications at any time.
Technical Data
Application Note

Thermal Resistance