RT4528

® RT4528 High Voltage Buck LED Driver with Dimming Control General Description The RT4528 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 RT4528 provides an internal soft-start function to avoid inrush current and thermal shutdown to prevent the device from overheat. The RT4528 is available in the SOP-8 (Exposed pad) package. Ordering Information RT4528 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. Features  High Voltage : VIN Up to 50V, VOUT Up to 50V  Built-In 3A 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  Under-Voltage Lockout  Thermal Shutdown  RoHS Compliant and Halogen Free Applications  Desk Lights and Room Lighting  Industrial Display Backlight Marking Information RT4528 GSPYMDNN RT4528GSP : Product Number YMDNN : Date Code Pin Configurations (TOP VIEW) VCC ISP ISN NC 8 27 GND...