BD9470AFM
White LED driver for medium sized and large sized LCD back light
BD9470AFM
White LED driver for medium sized and large sized LCD back light
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.
For Automotive usage, please contact Sales.
Product Detail
Specifications:
Topology
Boost
Vin(Min.)[V]
9
Vin(Max.)[V]
35
Total Output Current (Max.)[mA]
250
Number of Outputs
6
Switching Frequency (Max.)[MHz]
0.15
Dimming
PWM
Operating Temperature (Min.)[°C]
-40
Operating Temperature (Max.)[°C]
85
Package Size [mm]
18.5x9.9 (t=2.41)
Features:
· 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
