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RT8474A Datasheet

Part Number RT8474A
Manufacturers Richtek
Logo Richtek
Description High Voltage Multiple-Topology LED Driver
Datasheet RT8474A DatasheetRT8474A Datasheet (PDF)

® RT8474A High Voltage Multiple-Topology LED Driver with Open Detection General Description The RT8474A is a current-mode LED driver supporting wide input voltage range from 4.5V to 50V in multiple topologies. With the internal 500kHz operating frequency, the size of the external PWM inductor and input/output capacitors can be minimized. High efficiency is achieved by a 100mV current sensing control. LED dimming control can be done from either analog or PWM signal. The RT8474A provides an inte.

  RT8474A   RT8474A






Part Number RT8474
Manufacturers Richtek
Logo Richtek
Description High Voltage Multiple-Topology LED Driver
Datasheet RT8474A DatasheetRT8474 Datasheet (PDF)

® RT8474 High Voltage Multiple-Topology LED Driver with Dimming Control General Description The RT8474 is a current-mode LED driver supporting wide input voltage range from 4.5V to 50V and output voltage up to 50V. With internal 500kHz operating frequency, the size of the external PWM inductor and input/output capacitors can be minimized. High efficiency is achieved by a 100mV current sensing control. LED dimming control can be done from either analog or PWM signal. The RT8474 provides an inte.

  RT8474A   RT8474A







High Voltage Multiple-Topology LED Driver

® RT8474A High Voltage Multiple-Topology LED Driver with Open Detection General Description The RT8474A is a current-mode LED driver supporting wide input voltage range from 4.5V to 50V in multiple topologies. With the internal 500kHz operating frequency, the size of the external PWM inductor and input/output capacitors can be minimized. High efficiency is achieved by a 100mV current sensing control. LED dimming control can be done from either analog or PWM signal. The RT8474A provides an internal soft-start function to avoid inrush current and thermal shutdown to prevent the device from overheat. The RT8474A is available in the SOP-8 (Exposed pad) package. Features  High Voltage : VIN Up to 50V, VOUT Up to 50V  Support Multiple-Topologies (Buck / Boost / Buck- Boost)  Built-In 2A Power Switch  Current-Mode PWM Control  500kHz Fixed Switching Frequency  Analog or PWM Control Signal for LED Dimming  Internal Soft-Start to Avoid Inrush Current  OVP Pin for Adjustable OVP Level Protection (for Buck Only)  Under-Voltage Lockout  Thermal Shutdown  RoHS Compliant and Halogen Free Ordering Information RT8474A Package Type SP : SOP-8 (Exposed-Option 2) Note : Lead Plating System G : Green (Halogen Free and Pb Free) Richtek products are :  RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020.  Suitable for use in SnPb or Pb-free soldering processes. Applications  Desk Lights and Room Lighting  Industrial Display Backlight Ma.


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