White LED Driver for large LCD Panels (DCDC Converter type) - BD9479FV

BD9479FV is a high efficiency driver for white LEDsand designed for large LCDs. This IC is built-in a boostDCDC converters that employ an array of LEDs as thelight source. BD9479FV has some protect functionagainst fault conditions, such as the over-voltageprotection (OVP), the over current limit protection ofDCDC (OCP), the short circuit protection (SCP), theopen detection of LED string. Therefore BD9479FV isavailable for the fail-safe design over a wide rangeoutput voltage.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
Packing Type
BD9479FV-GE2 Active SSOP-B40 2000 2000 Taping Yes
Topology Boost
Number of Outputs 8
Vin(Min.)[V] 9.0
Vin(Max.)[V] 35.0
Frequency(Max.)[MHz] 0.8
Integrated FET No
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • ・ 8ch LED constant current driver (external PNP Tr Type)
    ・ Maximum LED setting current 500mA (VREF pin setting)
    ・ Build-in DC/DC converter
    ・ Analog Dimming (Linear) function
    ・ Individual channel PWM Dimming function
    ・ LED protection function (Open Short protection) [PWM-independent Type]
    ・ Output short protection (OVP)
    ・ Built-in Timer latch function (CP)
    ・ Built-in under voltage Lockout function (UVLO)・over voltage protection (OVP)
    ・ Built-in FAIL indication function
    ・ Built-in OVP voltage Feedback function
    ・ Built-in PWM-independent soft start circuit
    ・ SSOP-B40 Package
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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.