HFC0300 Variable Off Time Controller The Future of Analog IC Technology FEATURES DESCRIPTION Variable Off-Time, Current Mode Control HFC0300 is a variable off-time controller that Universal Main Supply Operation (85VAC to uses a fixed-peakcurrent technique to 265VAC) decrease its frequency as the load lightens. As Frequency Foldback as Load Lightens a result, it offers excellent efficiency at light-load Peak-Current Compression to Reduce while optimizing the efficiency under other load Transformer Noise conditions. Active-Burst Mode for Low Standby Power When the frequency decreases to threshold, Consumption the peak current decreases with the decreasing Internal High-Voltage Current Source load to prevent mechanical resonance in the Internal 200ns Leading Edge Blanking transformer. The controller enters burst mode Thermal Shutdown (Auto Restart with when the output power falls below a given level. Hysteresis) The HFC0300 features various protections such VCC Under-Voltage Lockout with Hysteresis as thermal shutdown, V under-voltage lockout, CC Over-Voltage Protection on VCC Pin overload protection, short-circuit protection, and Timer-Based Overload Protection over-voltage protection. Short-Circuit Protection Natural Spectrum Shaping for Improved The HFC0300 is available in SOIC-7 package. EMI Performance APPLICATIONS Battery Charger for Portable Electronics Standby Power Supply Switched-Mode Power Supplies All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. MPS and The Future of Analog IC Technology are registered trademarks of Monolithic Power Systems, Inc. HFC0300 Rev. 1.01 www.MonolithicPower.com 1 1/28/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved. HFC0300 VARIABLE OFF TIME CONTROLLER TYPICAL APPLICAION HFC0300 Rev. 1.01 www.MonolithicPower.com 2 1/28/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved.