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MPS HFC0300 Variable Off Time Controller

Monolithic Power Systems HFC0300 Variable Off Time Controller uses a fixed-peak-current technique to decrease its frequency as the load lightens. As a result, the HFC0300 Variable Off Time Controller offers excellent efficiency at light-load while optimizing the efficiency under other load conditions. When the frequency decreases to threshold, the peak current decreases to prevent mechanical resonance in the transformer. MPS' HFC0300 Variable Off Time Controller enters burst mode when the output power falls below a given level. Features for the Monolithic Power Systems HFC0300 Variable Off Time Controller includes various protections such as thermal shutdown, VCC under-voltage lockout, overload protection, short-circuit protection, and over-voltage protection.

Features
  • Variable Off-Time, Current Mode Control
  • Universal Main Supply Operation (85VAC to 265VAC)
  • Frequency Foldback as Load Lightens
  • Peak-Current Compression to Reduce Transformer Noise
  • Active-Burst Mode for Low Standby Power Consumption
  • Internal High-Voltage Current Source
  • Internal 200ns Leading Edge Blanking
  • Thermal Shutdown (Auto Restart with Hysteresis)
  • VCC Under-Voltage Lockout with Hysteresis
  • Over-Voltage Protection on VCC Pin
  • Timer-Based Overload Protection
  • Short-Circuit Protection
  • Natural Spectrum Shaping for Improved EMI Performance
Applications
  • Battery Charger for Portable Electronics
  • Standby Power Supply
  • Switched-Mode Power Supplies
  • Monolithic Power Systems (MPS)
  • Power Management
  • Semiconductors|Integrated Circuits|IC-Power Management