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PFS726

High Power PFC Controller with Integrated High-Voltage MOSFET

Power Integrations, Inc 

PFS704-729EG

Description

The HiperPFS™ device family members incorporate a

continuous conduction 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

Product Highlights

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 resistance 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

www.power.com

3

Rev. G 06/15

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