BD9470AFM
中型、大型LCD背光用白色LED驱动器
BD9470AFM
中型、大型LCD背光用白色LED驱动器
BD9470AFM是白色LED用高效率驱动器，适用于大屏幕液晶驱动器。BD9470AFM内置了可向光源（LED串联连接的阵列）提供适当电压的DCDC转换器。BD9470AFM内置了过电压保护（OVP: over voltage protection）、过电流检测（OCP: over current limit protection of DCDC）、短路电路保护（SCP: short circuit protection）、开路保护（open detection of LED string）等针对异常状态的保护功能。因此，可在更宽的输出电压条件及负载条件下使用。
主要规格
特性：
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)
特点：
· 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
