• Part: SC4538
  • Manufacturer: SEMTECH
  • Size: 276.54 KB
Download SC4538 Datasheet PDF
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SC4538 Key Features

  • 2.8V to 5.5V Current-mode PWM control
  • 800kHz
  • Programmable LED current up to 30mA
  • Soft-start to reduce in-rush current
  • PWM dimming
  • 100Hz to 50kHz
  • Analog and filtered-PWM dimming at ISET
  • Over-voltage protection
  • 38V (min.)
  • Under-voltage lockout (UVLO)

Related SEMTECH Datasheets

Part Number Description
SC453 VID Programmed Single Phase Power Supply Controller
SC4539 High Effi ciency Boost Converter
SC450 Dual Phase Power Supply Controller
SC4501 2MHz Step-Up Switching Regulator
SC4502 2MHz Step-Up Switching Regulator

SC4538 Description

The SC4538 is designed to regulate current for a series chain of white LEDs in LCD backlighting applications where small size and high efficiency are priorities. This device integrates an 800kHz current-mode PWM boost converter and a 30mA programmable low dropout current sink regulator. An external resistor sets the LED current up to 30mA.