原标题：PowerInt HiperPFS-4系列高效电源PFC控制方案

　　PowerInt公司的HiperPFS-4系列PFS7623-7629/7633-7636是集成了600V MOSFET的PFC控制器,不需要外接电流检测电阻,在整个负载范围内有最大化效率和最小化EMI,效率大于95%,230VAC时无负载功耗小于60mW,和EN61000-3-2 Class C与Class D兼容,主要用在PC,LCD TV,笔记本电脑,电器,电泵,马达,风扇,打印机和LED照明.本文介绍了HiperPFS-4系列产品亮点和主要特性,功能框图,典型应用电路框图以及采用HiperPFstm-4 PFS7627H的275W PFC前端参考设计DER-547主要特性,电路图,材料清单和PCB设计图.

　　The HiperPFS™-4 devices incorporate a continuous conduction mode (CCM) boost PFC controller, gate driver and 600 V power MOSFET in a single, low-profile (GROUND pin connected) power package. HiperPFS-4 devices eliminate need for external current sense resistors and their associated power loss, and use an innovative control technique that adjusts the switching frequency over output load, input line voltage, and input line cycle.

　　This control technique maximizes efficiency over the entire load range, particularly at light loads. Additionally, it minimizes the EMI filtering requirements due to its wide bandwidth spread spectrum effect. The HiperPFS-4 uses advanced digital techniques for line monitoring, line feed-forward scaling, and power factor enhancement; while using analog techniques for the core controller in order to maintain extremely low no-load power consumption. The HiperPFS-4 also features an integrated non-linear error amplifier for enhanced load transient response, a user programmable Power Good (PG) signal as well as user selectable power limit functionality. HiperPFS-4 includes Power Integrations’ standard set of comprehensive protection features, such as UV, OV, brown-in/out, and hysteretic thermal shutdown. HiperPFS-4 also provides cycle-by-cycle current limit and Safe Operating Area (SOA) protection of the power MOSFET, output power limiting for overload protection, and pin-to-pin short-circuit protection .

　　HiperPFS-4’s innovative variable frequency continuous conduction mode operation (VF-CCM) minimizes switching losses by maintaining a low average switching frequency, while modulating the switching frequency in order to suppress EMI, the traditional challenge with continuous conduction mode solutions. Systems using HiperPFS-4 typically reduce the total X and Y capacitance requirements of the converter, the inductance of both the boost choke and EMI noise suppression chokes, thereby reducing overall system size and cost. Additionally, HiperPFS-4 devices dramatically reduce component count and board footprint while simplifying system design and enhancing reliability, when compared with designs that use discrete MOSFETs and controllers. The innovative variable frequency, continuous conduction mode controller enables the HiperPFS-4 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 solutions where fixed MOSFET switching frequencies cause fixed switching losses on each cycle, even at light loads. In addition to featuring flat efficiency across the load range, HiperPFS-4 also enables a high power factor of >0.95 at 20% load. HiperPFS-4 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-4’s advanced power packaging technology and high efficiency simplify the complexity of mounting the IC and thermal management, while providing very high power capabilities in a single compact package; these devices are suitable for PFC applications with maximum continuous power from 75 W to 405 W universal (550 W high-line only).

　　HiperPFS-4系列产品亮点:

　　Protected Power Factor Correction Solution

　　Incorporates 600 V power MOSFET, controller and gate driver.

　　EN61000-3-2 Class C and 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.

　　Internal non-linear error amplifier for enhanced load transient response

　　No external current sense resistor 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.

　　Improved dynamic response. Digitally controlled input line feed-forward gain adjustment for flattened loop gain across entire input voltage range.

　　Eliminates up to 39 discrete components for higher reliability and lower cost.

　　Solution for High Efficiency, Low EMI and High PF

　　Continuous conduction mode PFC uses novel constant amp-second [on-time] volt-second [off-time] control. High efficiency across load.

　　High power factor across load.

　　Frequency sliding technique for light load efficiency improvements.>95% efficiency from 10% load to full load achievable 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 450 W [universal], 610 W [high-line only] 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 allows simple routing of board traces and to meet high-voltage creepage requirements.

　　Single package solution for PFC converter reduces assembly costs and layout size.

　　HiperPFS-4系列主要优势:

　　Integrated 600 V MOSFET

　　High efficiency and power factor across load range >95% efficiency from 10% load to 100% load

　　<60 mW no-load consumption at 230 VAC

　　PF >0.95 achievable at 20% load

　　EN61000-3-2 Class C and D compliant

　　Highly integrated for smallest boost PFC form factor

　　Packaging optimized for high volume production

　　Eliminates insulating pad/heat-spreader

　　Programmable Power Good (PG) signal

　　User selectable power limit: Enables different HiperPFS-4 family members to be tested in the same design for optimum device selection

　　Integrated non-linear amplifier for fast output OV and UV protection and transient response

　　Digital line peak detection for robust performance even with distorted input voltage from UPS or generators

　　Digital power factor enhancer compensates for EMI filter and bridge distortion, providing high-line PF >0.95 @ 20% load

　　Frequency adjusted over line voltage and thru each line cycle Spread-spectrum across >60 kHz window simplifies EMI filtering

　　Reduces boost inductance

　　Provides up to 450 W peak output power for universal applications, 610 W for high-line only applications

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

　　Withstands 305 VAC steady-state and 410 VAC abnormal input

　　Halogen free and RoHS compliant

　　HiperPFS-4系列应用:

　　•PC

　　• High-power adaptors

　　•Printer

　　• High-power LED lighting

　　•LCD TV

　　• Industrial and appliance

　　•Video game consoles

　　• Generic PFC converters

　　•80 Plus™ Platinum designs

　　图1.HiperPFS-4系列功能框图

　　图2.HiperPFS-4系列典型应用电路框图

　　采用HiperPFSTM-4 PFS7627H的275W PFC前端参考设计DER-547

　　This engineering report describes a PFC power supply utilizing a HiperPFS-4 PFS7627H PFC controller with integrated power MOSFET and external boost diode. This power supply is intended as a general purpose platform that operates from 100 VAC to 300 VAC input voltage and provides a regulated 440 V DC output voltage and continuous output power of 275 W.

　　The DER-547 power supply is designed to operate with forced air cooling greater than 200 LFM for all input and load conditions up to the rated maximum ambient temperature of 50 ºC.

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

　　图3.275W PFC前端参考设计DER-547外形图(顶视图)

　　图4.275W PFC前端参考设计DER-547外形图(底视图)

　　275W PFC前端参考设计DER-547主要特性:

　　• Wide operating range 100 VAC – 300 VAC

　　• Highly integrated, low component count, low-cost PFC

　　• Ultra-low reverse recovery loss diode (QspeedTM)

　　• Power Integrations eSIP-16 low-profile controller package

　　• “Cool-Pad” package reduces IC mounting hardware • Eliminates insulating pad/heat-spreader

　　• EN61000-3-2 Class-D compliant

　　• High PFC efficiency enables up to 80+ Platinum PC Main design

　　• Enhanced light load power factor (PF) • PF >0.95 at 20% load and 230 VAC, 50 Hz input

　　• PF >0.95 at 50% load

　　• Frequency sliding maintains high efficiency across load range • >95% from 20% to 100% load (115 VAC and 230 VAC input)

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

　　• Excellent transient load response

　　• Frequency adjusted over input line voltage and load • Spread-spectrum across >60 kHz window simplifies EMI filtering requirements

　　275W PFC前端参考设计DER-547电源指标:

　　275W PFC前端参考设计DER-547材料清单:

　　Power Integrations近日推出HiperPFS-4系列功率因数校正(PFC) IC。新器件系列适合要求在满载及轻载下均提供优异效率及功率因数性能的应用。HiperPFS-4器件采用紧凑型电气隔离的可散热封装，内部同时集成了一个适合305 VAC输入的600 V MOSFET和一个高效率变频CCM PFC控制器。该IC系列不仅能提供高功率因数和低THD，而且还可在非常宽的输出负载范围内始终实现高效率，使OEM厂商符合严格的80 PLUS® Platinum及Titanium级电源标准。

　　HiperPFS-4 IC即使在20%额定负载下也能实现0.95以上的高功率因数和低THD。新器件还可满足主要计算机和娱乐设备提供商提出的严苛雷击要求，比如1秒410 VAC输入测试，该测试是为了确保产品能够在电压骤升和雷击情况下依然具有良好的可靠性和耐受性。

　　新款HiperPFS-4 IC适合300 W以内的密闭式设计、400 W以内的敞开式电源以及550 W以内的高压输入应用。具体保护特性包括欠压锁定(UVLO)保护、欠压(UV)保护、过压(OV)保护、过温保护(OTP)、电压缓升/跌落保护、逐周期限流以及功率限制保护。 HiperPFS-4 IC在230 VAC下的功耗不到60 mW，并且在空载下仍然保持输出稳压，睡眠模式下的功耗低于20 mW。

　　Power Integrations产品营销经理Edward Ong表示：“HiperPFS-4产品系列能够在非常宽的负载范围内提供极高的效率和功率因数以及低THD。HiperPFS-4采用独一无二的频率滑动控制技术，可使电源设计在极轻负载下提供极高的效率，这一优势对于满足10%负载下有效率要求的EU CoC标准来说非常重要。该IC系列内部集成了一个600 V功率MOSFET并具备多项先进的保护特性，因此非常适用于输入电压波动较为严重的国家或地区。HiperPFS-4器件具备良好的305 VAC输入安全裕量，可确保PFC安全运行，特别适合数据中心和商用LED照明。其他应用包括冰箱(将会包含高PFC性能要求)、无绳工具充电器以及电动自行车电池充电器。”

　　HiperPFS-4 IC分别提供高压输入和低压输入应用版本，并且采用散热性极好的eeSIP封装，可简化散热片的安装。该器件基于10,000片的订货量单价为每片1.46美元。

　　以上是关于电源管理中-PI推出HiperPFS-4功率因数校正IC 可使550W以内PFC设计的效率达到98%

　　详情请见:

hiperpfs-4_family_datasheet.pdf

der547.pdf