White LED driver for medium sized and large sized LCD back light - BD9470AFM

BD9470AFM is high efficiency driver for white LED. They are designed for large sized LCD. BD9470AFM is built-in DCDC converter that supply appropriate voltage for light source. BD9470AFM is also built-in protection function for abnormal state such as OVP: over voltage protection, OCP: over current limit protection of DCDC, SCP: short circuit protection, open detection of LED string. Thus they are used for conditions of large output voltage and load conditions.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
número de peça
Estado de Condição
Quantidade Unidade
Quantidade mínima Package
tipo de embalagem
BD9470AFM-GE2 Active HSOP-M28 1500 1500 Taping sim
Topology Boost
Number of Outputs 6
Vin(Min.)[V] 9.0
Vin(Max.)[V] 35.0
Output Current(Max.)[mA] 250.0
Frequency(Max.)[MHz] 0.15
Integrated FET No
Dimming PWM
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • · 6chLED constantcurrent driver
    · LED maximum output current 250mA
    · Individual PWM dimming modulation allowed for LEDs
    · ±2%LED current accuracy (when eachLED is set to 130mA)
    · Built-inLED feedback voltage automatic adjustment circuit according toLED current
    · Built-in start-up circuit independent of PWM light modulation
    · built-in VOUT・FB voltage maintenance function when PWM=Low(0%)
    · Built-in LED current stabilization circuit while scanning operation is performed
    · Built-in VOUT discharge circuitwhile shutdown
    · Built-inLED protection(OPEN / SHORT protection)
    · Individual detection and individual LED OFF for both open and short circuit
    · AdjustableLED short-circuit protection threshold
    · PWM-independentLED protection
    · VOUT over voltage protection (OVP) and reduced voltage protection(SCP) circuit
    · Built-in failure indication function
    · Built-inISET pin short-circuit protection circuit
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Dados técnicos
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.