1ch Buck Type (Quasi-Resonant Control) White LED Driver for Large LCD Included 250V MOSFET - BM531Q11

BM531Q11 is a high efficiency driver for white LEDs and designed for large LCDs. BM531Q11 is built-in a quasi-resonant control method DCDC converter that employ an array of LEDs as the light source. BM531Q11 is built-in 250V MOSFET and owing to the external current setting resistance, a power supply design with a high degree of freedom can be achieved.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BM531Q11-Z Active DIP7AK 2000 2000 Tube Yes
Topology Buck
Number of Outputs 1
Vin(Min.)[V] 9.0
Vin(Max.)[V] 35.0
Frequency(Max.)[MHz] 0.44
Dimming PWM / Analog
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 105
    • Quasi-resonant switching mode
    • Built-in 250V MOSFET
    • Maximum frequency 400kHz
    • VCC pin: under voltage protection
    • SOURCE pin: Leading-Edge-Blanking function
    • PWM and ADIM dimming operating
    • FAIL signal output (ADIM pin)
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New Products:
Technical Data
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.