Spread Spectrum LED driver




LT3795 – 110V LED Controller with Spread Spectrum Frequency Modulation

Features

  • 3000:1 True Color PWM™ Dimming
  • Wide Input Voltage Range: 4.5V to 110V
  • Input and Output Current Reporting
  • PMOS Switch Driver for PWM and Output Disconnect
  • Internal Spread Spectrum Frequency Modulation
  • ±2% Constant Voltage Regulation
  • ±3% Constant Current Regulation: 0V ≤ VOUT ≤ 110V
  • Programmable Input Current limitSpread Spectrum LED driver

 

  • CTRL Inputs Linearly Adjust LED Current
  • Adjustable Frequency: 100kHz to 1MHz
  • Programmable Open LED Protection with OPENLED Flag
  • Short-Circuit Protection and SHORTLED Flag
  • Programmable Undervoltage Lockout with Hysteresis
  • Soft-Start with Programmable Fault Restart Timer
  • C/10 Detection for Battery Charging
  • Available in 28-Lead TSSOP Package

Typical Application

Description

The LT®3795 is a DC/DC controller designed to regulate a constant-current or constant-voltage and is ideal for driving LEDs. It drives a low side external N-channel power MOSFET from an internal regulated 7.7V supply. The fixed frequency and current mode architecture result in stable operation over a wide range of supply and output voltages. Spread spectrum frequency modulation (SSFM) can be activated for improved electromagnetic compatibility (EMC) performance.

 

For more detail: Spread Spectrum LED driver




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