Solution Description
This is a 3 kW interleaved PFC solution based on the STNRGPF01 digital controller IC,
which is able to drive up to three channels in an interleaved CCM boost power factor
corrector (PFC)
The PFC digital controller implements mixed signal (analog/digital) average current mode
control in CCM at fixed frequency. The analog section ensures maximum responsiveness
through cycle-by-cycle current regulation, while digital control of non-time critical
operations provides the flexibility to configure the device for different applications.
The STNRGPF01 embeds several functions, such as programmable soft start-up, burst
mode light load management, automatic channel current balance, load current and input
voltage feed forward, flexible phase-shedding management and cooling system
management. The STNRGPF01 can be configured using the eDesignSuite visual software
tool to match a wide range of application contexts.
In the power stage, the STW40N60M2 N-channel Power MOSFET with low gate charge is
used as the boost switch to manage the high switching frequency requirements. The
MOSFET is based on MDmesh™ M2 technology and features a low on-resistance for
reduced conduction losses and excellent output capacitance (Coss) profile for low
switching energy and increased light load efficiency. Boost diode selection is also critical
for PFC operation in CCM at high frequencies, in order to minimize power losses. The
STPSC12065 650 V power Schottky silicon carbide diode offers fast recovery with
negligible reverse recovery charge (Qrr) and the minimal capacitive turn-off behavior is
independent of temperature.
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Key Product Benefits
STNRGPF01 digital controller
The STNRGPF01 digital controller is an application-specific IC for interleaved PFC
boost topologies designed for high power applications. The digital controller IC
facilitates IEC 61000-3-2 compliance in high power density designs, delivering high
power factor and extremely low THD, with excellent output voltage regulation and
flat efficiency curves. The device works in CCM at fixed frequency with average
current mode control, in applications based on a mixed signal (analog/digital)
architecture.
STW40N60M2 N-channel Power MOSFET
These N-channel Power MOSFETs featuring MDmesh™ M2 technology allow high
conversion efficiency through their low on-resistance and optimized switching
characteristics.
STPSC12065 SiC diode
This ST SiC diode boosts performance in hard switching conditions and is ideal for
PFC applications. Its high forward surge capability ensures good robustness during
transient phases.
https://www.st.com/en/solutions-reference-designs/sl-ipfc01v1.html#1