White LED Diver for Backlight of Medium/Large-sized LCDs - BD9271KUT

BD9271KUT is a white LED diver used on backlight of Medium/Large-sized LCDs. This IC can achieve dimming function by SPI control. And through the SPI correspondence, it can set the ON/OFF of each switch, analog dimming and etc. The signals of PWM dimming can set the frequency, ON time and delay of PWM by inputting the external signals to the register. BD9271KUT has equipped several protection functions to deal with the abnormal states, including LED OPEN protection, LED SHORT protection, external current setting resistance SHORT protection, external MOS transistor SHORT protection, etc. So it can be used in a wide output voltage range and various load conditions.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
Constitution Materials List
BD9271KUT-GZE2 Active TQFP64U 1500 1500 Taping inquiry Yes
Topology Constant Current
Number of Outputs 16
Data Input 3-wire
Data Vin(Min.)[V] 3.0
Data Vin(Max.)[V] 3.6
Vin(Min.)[V] 9.0
Vin(Max.)[V] 35.0
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • ·16-ch constant current driver (external FET(NMOS) is equipped.)
    ·LED voltage can be set externally.
    ·PWM dimming and Analogue dimming can be
    controlled by SPI.
    ·LED Abnormal operation detection circuit (OPEN
    protection/ SHORT protection) is equipped.
    ·LED SHORT protection detection voltage is adjustable
    (LSP terminal)
    ·LED SHORT protection detection CH
    ·FAIL INDICATION function is equipped by ERR_DET
    ·3 lines serial interface
    ·Package: TQFP64U
Technical Data
Application Note

Thermal Resistance