PFS7526H datasheet(2/37 Pages) POWERINT

2 / 37 page

Rev. D 04/25

PFS7523-7529/7533-7539

www.power.com

Description

The HiperPFS™-3 devices incorporate a continuous conduction mode

(CCM) boost PFC controller, gate driver, ultra-low reverse recovery

(Qspeed™) diode and high-voltage power MOSFET in a single,

low-profile (GROUND pin connected) power package. HiperPFS-3

devices eliminate the PFC converter’s need for external current sense

resistors and the associated power loss, and use an innovative control

technique that adjusts the switching frequency over output load,

input line voltage, and even input line cycle.

This control technique maximizes efficiency over the entire load range

of the converter, particularly at light loads. Additionally, it significant-

ly minimizes the EMI filtering requirements due to its wide bandwidth

spread spectrum effect. The HiperPFS-3 uses advanced digital

techniques for line monitoring functions, 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-3 also features an integrated non-linear

error amplifier for enhanced load transient response, a user program-

mable Power Good (PG) signal as well as user selectable power limit

functionality. HiperPFS-3 includes Power Integrations’ standard set of

comprehensive protection features, such as integrated UV, OV,

brown-in/out, and hysteretic thermal shutdown. HiperPFS-3 also

provides cycle-by-cycle current limit and Safe Operating Area (SOA)

protection of the power MOSFET, power limiting of the output for

overload protection, and pin-to-pin short-circuit protection.

HiperPFS-3’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-3

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-3 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-3 to realize all of

the benefits of continuous conduction mode operation while leverag-

ing 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 in which fixed MOSFET switching frequencies cause

fixed switching losses on each cycle, even at light loads. In addition

to featuring relatively flat efficiency across the load range, HiperPFS-3

also enables high power factor of >0.92 at 20% load. HiperPFS-3

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-3’s advanced power packaging technology and high efficien-

cy simplify the complexity of mounting the IC and thermal manage-

ment, while providing very high power capabilities in a single compact

package; these devices are suitable for PFC applications from 75 W to

900 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 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 40 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 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 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], 1 kW [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 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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