HF81 X Capacitor Bleeder The Future of Analog IC Technology DESCRIPTION FEATURES HF81 is an innovative two-terminal IC that Disconnect series discharge resistors from automatically discharges an X capacitor while L-N when AC voltage is applied eliminating power losses and allowing power Connect series discharge resistors with L-N supplies to comply with safety standards. to discharge the X capacitor when AC The HF81 acts as a smart high-voltage switch voltage is unplugged when placed in series with discharge resistors Supplied by AC voltage directly and doesnt (alternatively bleed resistors). In the presence need external bias of an AC voltage, the HF81 blocks current flow Meets safety standards for use before or in the safety discharge resistors to reduce the after input fuse power loss in these components to zero at 230 No external ground pin leads to high VAC. When disconnected from the AC voltage, common mode surge immunity the HF81 automatically and safely discharges 1000V internal JFET inside leads to high the X capacitor by closing the circuit through differential surge immunity the bleed resistors and directing the energy >4mm creepage on package and PCB away from the exposed AC plug. Compliant to IEC 60950-1 Table 1: Component Selection Table APPLICATIONS X Total Series Power PN (1) Capacitance Resistance Saving AC/DC converters with X capacitors larger 500nF 1.5M than 0.1 F 750nF 1M 66mW All converters requiring ultra-low no-load 1 F 780k 86mW consumption and low standby power 1.5 F 480k 142mW HF81 Appliances requiring EuP Lot 6 compliance 2 F 360k 191mW Appliances requiring Energy Star V2.0 2.5 F 300k 230mW White Goods (For example, Dishwasher, 3.5 F 200k 347mW Washing Machine, Air-Conditioner and etc.) 5 F 150k 464mW Server Power, Telecom Power, ATX Power Notes: 1) The values are calculated at Vin=265Vac All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION HF81 Rev. 1.14 www.MonolithicPower.com 1 9/28/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2015 MPS. All Rights Reserved. HF81 X CAPACITOR BLEEDER ORDERING INFORMATION Part Number* Package Top Marking HF81GS SOIC8 HF81 * For Tape & Reel, add suffix Z (e.g. HF81GSZ) PACKAGE REFERENCE TOP VIEW NC 1 8 NC L1 2 7 L2 L1 3 6 L2 NC 4 5 NC (2) (6) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC L1-L2 Pin Voltage .................................... 1000V SOIC8..................................... 90...... 45... C/W Storage Temperature................. -65C to 150C Notes: Lead Temperature ....................................260C 2) Exceeding these ratings may damage the device. (3) 3) The maximum allowable power dissipation is a function of the Continuous Power Dissipation (T = +25C) A maximum junction temperature T (MAX), the junction-to- J ...1.4W ambient thermal resistance , and the ambient temperature JA (4) T . The maximum allowable continuous power dissipation at A Single Avalanche Energy....................... 70J any ambient temperature is calculated by P (MAX) = (T D J (4) Avalanche Current .................................80mA (MAX)-T )/ . Exceeding the maximum allowable power A JA dissipation will cause excessive die temperature, and the Junction Temperature...............................150C regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent (5) Recommended Operating Conditions damage. 4) L=5mH, Vgs=10V, V =1.4V DD Operating Junction Temp. (T ). -40C to +125C J 5) The device is not guaranteed to function outside of its operating conditions. 6) Measured on JESD51-7, 4-layer PCB. HF81 Rev. 1.14 www.MonolithicPower.com 2 9/28/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2015 MPS. All Rights Reserved.