Applications
• PC • High-power adaptors
• Printer • High-power LED lighting
• LCD TV • Industrial and appliance
• Video game consoles • Generic PFC converters

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 (eSIP™ 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.