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MAX17690 - No-Opto Isolated Flyback Controller

Description

The MAX17690 is a peak current mode, fixed-frequency switching controller specifically designed for the isolated flyback topology operating in Discontinuous Conduction Mode (DCM).

Features

  • 4.5V to 60V Input Voltage Range.
  • No Optocoupler or Third Winding Required to Derive Feedback Signal Across Isolation Boundary.
  • 2A/4A Peak Source/Sink Gate Drive Currents.
  • 50kHz to 250kHz Programmable Switching Frequency.
  • Input EN/UVLO Feature.
  • Input Overvoltage Protection.
  • Programmable Soft-Start.
  • Hiccup-Mode Short-Circuit Protection.
  • Thermal Shutdown Protection.
  • -40°C to 125°C Operating Temperat.

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Full PDF Text Transcription

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Click here for production status of specific part numbers. MAX17690 EVALUATION KIT AVAILABLE 60V, No-Opto Isolated Flyback Controller General Description The MAX17690 is a peak current mode, fixed-frequency switching controller specifically designed for the isolated flyback topology operating in Discontinuous Conduction Mode (DCM). The device senses the isolated output voltage directly from the primary-side flyback waveform during the off-time of the primary switch. No auxiliary winding or optocoupler is required for output voltage regulation. The MAX17690 is designed to operate over a wide supply range from 4.5V to 60V. The switching frequency is programmable from 50kHz to 250kHz. A EN/UVLO pin allows the user to turn on/off the power supply precisely at the desired input voltage.
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