DCDC2.5V-24V升150V升壓恒流LED驅動器大功率投影儀驅動方案

小鄭

General Description
  The SL8830 is boost topology switching regulator for LED driver. It provides built-in gate driver
pin for driving external N-MOSFET. The non-inverting input of error amplifier connects to a 0.2V
reference voltage. It has programmable soft start time set by external capacitor, and over voltage
protection set by external resistor. The LED current can be adjusted by an external signal connecting
to the EN pin. EN pin accepts either a DC voltage or a PWM signal. The PWM signal filter components
are contained within the chip.

Features
  Start-up Voltage: 2.5V
  Wide Supply Voltage Operating Range: 4.5V to 24V
  Precision Feedback Reference Voltage: 0.2V (Max.)
  Analog and Digital Dimming Control
  Shutdown Current: 6μA (Max.)
  Internal Fixed Switching Frequency: 300KHz
  Programmable Soft Start Function (SS)
  Programmable Over Voltage Protection (OVP)
  Over Temperature Protection (OTP)
  Package: SOP-8L(EP)

Applications
  LED Module
  Display Backlight
  Car Lighting
  Portable LED Lighting

Typical Application Circuit