摘要：  本文介绍了HiperPFS 系列产品亮点和主要特性， 功能框图， 374W，180W和900W PFC电源电路图，以及采用PFS740EG的高性能小型100W PFC电源参考设计技术指标，电路图，材料清单和PCB布局图.

关键字：  器件，  控制器，  驱动器，  适配器

Powerint公司的100W PFC电源参考设计是采用HiperPFS系列的 PFS704EG 器件，该系列器件集成了CCM PFC控制器，栅极驱动器和高压功率MOSFET，和EN61000-3-2 Class C与D兼容，10%和20%负载时的效率高，从10%到满负荷的效率大于95%，可提供高达1kW的峰值输出功率，频率可根据火线电压和频率调整，主要用在PC，大功率适配器，打印机，大功率LED照明，工业和家用电器，视频游戏机控制台等.本文介绍了HiperPFS 系列产品亮点和主要特性， 功能框图， 374W，180W和900W PFC电源电路图，以及采用PFS740EG的高性能小型100W PFC电源参考设计技术指标，电路图，材料清单和PCB布局图.

The HiperPFS device family members incorporate a continuous condition mode (CCM) boost PFC controller， gate driver， and high voltage power MOSFET in a single， low-profile eSIP power package that is able to provide near unity input power factor. The HiperPFS 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. HiperPFS includes Power Integrations’ standard set of comprehensive protection features， such as integrated soft-start， UV， OV， brown-in/out， and hysteretic thermal shutdown. HiperPFS also provides cycle-by-cycle current limit for the power MOSFET， power limiting of the output for over-load protection， and pin-to-pin short-circuit protection.

HiperPFS’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 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 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 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. HiperPFS 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 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 1 kW

HiperPFS 系列产品亮点:

Protected Power Factor Correction Solution

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 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

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

Intelligent Solution for High Efficiency and Low EMI

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

Advanced Package for High Power Applications

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 impedance 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

HiperPFS系列主要特性:

Single chip solution for boost power factor correction (PFC)

EN61000-3-2 Class C and D compliant

High light load efficiency at 10% and 20% load

>95% efficiency from 10% load to full load

<130 mW no-load consumption at 230 VAC with output in regulation

<50 mW no-load consumption at 230 VAC in remote off state

Frequency adjusted over line voltage， and line cycle

Spread-spectrum across >60 kHz window to simplify EMI filtering requirements

Lower boost inductance

Provides up to 1 kW peak output power

>1 kW peak power delivery in power limit voltage regulation mode

High integration allows smaller form factor， higher power density designs

Incorporates control， gate driver， and high-voltage power MOSFET

Internal current sense reduces component count and system losses

Protection features include: UV， OV， OTP， brown-in/out， cycle-by-cycle current limit， and power limiting for overload protection

Halogen free and RoHS compliant

HiperPFS系列应用:

PC

High power adaptors

Printer

High power LED lighting

LCD TV

Industrial and appliance

Video game consoles

Generic PFC converters

图1. HiperPFS系列功能框图

图2.采用PFS714EG的347W PFC电源电路图

图3.采用PFS708EG的180W PFC电源电路图

图4.采用PFS729EG的900W PFC电源电路图

采用PFS740EG的高性能小型100W PFC电源参考设计

This document is an engineering report describing a PFC power supply utilizing a HiperPFS PFS704EG integrated PFC controller. This power supply is intended as a general purpose evaluation platform that operates from universal input and provides a regulated 380 VDC output voltage and a continuous output power of 100 W.

This power supply can deliver the rated power at 110 VAC or higher at a room temperature of 25 ºC. For operation at higher temperatures or lower input voltages， use of forced air cooling is recommended.

The document contains the power supply specification， schematic， bill of materials， inductor documentation， printed circuit layout， and performance data.

100W PFC电源参考设计主要特性:

Low component count， high performance PFC

EN61000-3-2 Class D compliance

High PFC efficiency enables 80 Plus PC Main design

Frequency sliding maintains high efficiency across load range

Feed forward line sense gain - maintains relatively constant loop gain over entire operating voltage range

Excellent transient load response

Power Integration eSIPTM low-profile， low thermal resistance package

Low profile， <15 mm above PCB

图5.100W PFC电源参考设计外形图

100W PFC电源指标:

图6.100W PFC电源参考设计电路图

100W PFC电源参考设计材料清单(BOM):

图7.100W PFC电源参考设计PCB布局图(122.2 mm) x 2.24” (56.9 mm)