PFS726EG [Power Integrations]

Single chip solution for boost power factor correction (PFC). Incorporates high-voltage power MOSFET, controller, and gate driver. EN61000-3-2 Class D compliance. Integrated protection features reduce external component count. Accurate built-in brown-in/out, undervoltage (UV), overvoltage (OV) protection. Hysteretic thermal shutdown (OTP). Internal power limiting function for overload protection. Cycle-by-cycle power switch current limit. No external current sense required. Provides 'lossless' internal sensing via sense-FET. Reduces component count and system losses. Minimizes high current gate drive loop area. Minimizes output overshoot and stresses during start-up. Integrated power limit and frequency soft start. Improve dynamic response. Input line feed-forward gain adjustment for constant loop gain across entire input voltage range. Eliminates up to 40 discrete components for higher reliability and lower cost. Continuous conduction mode PFC uses novel constant volt/amp-second control engine. High efficiency across load using a UF boost diode. Low cost EMI filter. Universal input device (PFS704 – PFS716) utilize frequency sliding technique for light load efficiency improvements. >95% efficiency from 10% load to full load at low line input voltage. >96% efficiency from 10% load to full load at high line input voltage. High line input device (PFS723 – PFS729) maintain higher average switching frequency to minimize boost inductance and core size. >94% efficiency from 10% load to full load. Variable switching frequency to simplify EMI filter design. Varies over line input voltage to maximize efficiency and minimize EMI filter requirements. Varies with input line cycle voltage by >60 kHz to maximize spread spectrum effect. Up to 1 kW peak output power capability in a highly compact package. Simple clip mounting to heat sink. Can be directly connected to heat sink with insulation pad. Provides thermal resistance equivalent to a TO-220. Staggered pin arrangement for simple routing of board traces and high voltage creepage requirements. Single package solution for PFC converter reduces assembly costs and layout size.