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AFP1422

AFP1422

Configurable 1MHz Rad-Hard PWM Controller

The AFP1422 is a configurable 1 MHz radiation-hardened pulse width modulation (PWM) controller with four integrated low-side drivers optimized for controlling GaN and Si based MOSFETs. It can support buck, interleaved buck, flyback and forward topologies.

This PWM controller utilizes rad-hard by process (RHBP) and rad-hard by design (RHBD) techniques to withstand the harsh radiation environment of space without compromising performance.

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Features

  • 3.0 VDC to 5.5 VDC operation
  • Differential current sense with 14V common mode range
  • Adjustable constant frequency 50 kHz to 1MHz
  • Synchronizable up to 1MHz
  • Resistor configurable PID compensation
  • Adjustable dead times
  • Four integrated drivers for direct drive of low side GaN or transformer coupled FETs
  • Programmable soft-start time
  • 1% regulation accuracy
  • Designed for military temperature environments (-55 °C to +125 °C)
  • Built-in triple redundancy for enhanced reliability
  • Over-temperature warning
  • Class 2 ESD protection

Radiation Performance

  • TID resilience of 300 krad (Si)
  • SEE resilience of 75 MeV-cm²/mg

Packaging Information

  • 44 pin LQFP Package (14 mm x 14 mm)

Benefits

  • Supports buck, interleaved buck, flyback, and forward topologies
  • PID compensator for flexible and non-linear loop control
  • Enables high voltage conversion
  • 1 MHz switching frequency to optimize efficiency and size of GaN applications
  • Integrated low-side/transformer drivers to lower component count
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