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PFS7327H Datasheet(PDF) 2 Page - Power Integrations, Inc. |
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PFS7327H Datasheet(HTML) 2 Page - Power Integrations, Inc. |
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2 / 30 page  Rev. B 06/13 2 PFS7323-7329 www.powerint.com Description The HiperPFS-2 device family members reach a very high level of integration including a continuous conduction mode (CCM) boost PFC controller, gate driver, ultra-low reverse recovery (Qspeed) diode (eeSIP™ package options) and high-voltage power MOSFET in a single, low-profile CoolPAD (GROUND pin connected) power package that is able to provide near unity input power factor. The HiperPFS-2 devices eliminate the PFC converter’s need for external current sense resistors, the power loss associated with those components, and leverages an innovative control technique that adjusts the switching frequency over output load, input line voltage, and even input line cycle. This control technique is designed to maximize efficiency over the entire load range of the converter, particularly at light loads. Additionally, this control technique significantly minimizes the EMI filtering requirements due to its wide bandwidth spread spectrum effect. The HiperPFS-2 also features an integrated non-linear amplifier for enhanced load transient response, a user programmable power good (PG) signal as well as user selectable power limit functionality. HiperPFS-2 includes Power Integrations’ standard set of comprehensive protection features, such as integrated soft-start, UV, OV, brown-in/out, and hysteretic thermal shutdown. HiperPFS-2 also provides cycle-by-cycle current limit for the power MOSFET, power limiting of the output for overload protection, and pin-to-pin short-circuit protection. HiperPFS-2’s innovative variable frequency continuous conduction mode of operation (VF-CCM) minimizes switching losses by maintaining a low average switching frequency, while also varying the switching frequency in order to suppress EMI, the traditional challenge with continuous conduction mode solutions. Systems using HiperPFS-2 typically reduce the total X and Y capacitance requirements of the converter, the inductance of both the boost choke and EMI noise suppression chokes, reducing overall system size and cost. Additionally, compared with designs that use discrete MOSFETs and controllers, HiperPFS-2 devices dramatically reduce component count and board footprint while simplifying system design and enhancing reliability. The innovative variable frequency, continuous conduction mode controller enables the HiperPFS-2 to realize all of the benefits of continuous conduction mode operation while leveraging low-cost, small, simple EMI filters. Many regions mandate high power factor for many electronic products with high power requirements. These rules are combined with numerous application-specific standards that require high power supply efficiency across the entire load range, from full load to as low as 10% load. High efficiency at light load is a challenge for traditional PFC approaches in which fixed MOSFET switching frequencies cause fixed switching losses on each cycle, even at light loads. Besides featuring relatively flat efficiency across the load range, HiperPFS-2 also enables higher power factor at light loads. HiperPFS-2 simplifies compliance with new and emerging energy-efficiency standards over a broad market space in applications such as PCs, LCD TVs, notebooks, appliances, pumps, motors, fans, printers, and LED lighting. HiperPFS-2 advanced power packaging technology and high efficiency simplifies the complexity of mounting the package and thermal management, while providing very high power capabilities in a single compact package; these devices are suitable for PFC applications from 75 W to 425 W. Product Highlights Protected Power Factor Correction Solution • Incorporates high-voltage power MOSFET, ultra-low reverse recovery loss Qspeed diode, controller, and gate driver • EN61000-3-2 Class D and Class C compliance • Integrated protection features reduce external component count • Accurate built-in brown-in/out protection • Accurate built-in undervoltage (UV) protection • Accurate built-in overvoltage (OV) protection • Hysteretic thermal shutdown (OTP) • Internal power limiting function for overload protection • Cycle-by-cycle power switch current limit • Internal non-linear amplifier for enhanced load transient response • 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 • Improved 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 Intelligent Solution for High Efficiency and Low EMI • Continuous conduction mode PFC uses novel constant volt/ amp-second control engine • High efficiency across load • High power factor across load • Low cost EMI filter • Frequency sliding technique for light load efficiency improvements • >95% efficiency from 10% load to full load at nominal input voltages • 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 Advanced Package for High Power Applications • Up to 425 W peak output power capability in a highly compact package • Simple adhesive or clip mounting to heat sink • No insulation pad required and can be directly connected to heat sink • 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 |
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