HF900 900V Offline Switching Regulator The Future of Analog IC Technology DESCRIPTION FEATURES The HF900 is a flyback regulator with an Internal Integrated 900V MOSFET integrated 900V MOSFET. Requiring a minimum Programmable Fixed Switching Frequency up number of external components, the HF900 to 300kHz provides excellent power regulation in AC/DC Frequency Jittering applications that require high reliability. These Current-Mode Operation applications include smart meters, large Internal High-Voltage Current Source appliances, industrial controls, and products Low Standby Power Consumption via Active powered by unstable AC grids. Burst Mode Internal Leading Edge Blanking The regulator uses peak-current-mode control to provide excellent transient response and easy Built-In Soft-Start Function loop compensation. When the output power falls Internal Slope Compensation below a given level, the regulator enters burst Built-In Input Over-Voltage Protection mode to lower the standby power consumption. Over-Temperature Protection (OTP) V Under-Voltage Lockout with Hysteresis CC The MPS proprietary 900V monolithic process Over-Voltage Protection on V CC enables over-temperature protection (OTP) on Time-Based Overload Protection the same silicon of the 900V power FET, offering precise thermal protection. Also, it offers a full Short-Circuit Protection (SCP) suite of protection features such as V under- CC APPLICATIONS voltage lockout, over-load protection, over- voltage protection, and short-circuit protection. Smart Power Meters Large Appliances The HF900 is designed to minimize Industrial Controls electromagnetic interference for wireless All AC/DC Supplies Sold Where Power Grid communication in home and building automation may be Unstable applications. The operating frequency is programmed externally with a single resistor, so the power supplys radiated energy can be All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For designed to avoid the interference with wireless MPS green status, please visit MPS website under Quality Assurance. communication. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. In addition to the programmable frequency, the HF900 employs a frequency jittering function that not only greatly reduces the noise level but also reduces the cost of the EMI filter. The HF900 is available in SOIC14-11 and PDIP8-7EP packages. HF900 Rev. 1.0 www.MonolithicPower.com 1 8/4/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2015 MPS. All Rights Reserved. HF900 900V OFFLINE SWITCHING REGULATOR TYPICAL APPLICATION HF900 Rev. 1.0 www.MonolithicPower.com 2 8/4/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2015 MPS. All Rights Reserved.