STEVAL-ISA147V3

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500 W fully digital AC-DC power supply (D-SMPS) based on STM32F334C8 microcontroller

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Product overview

Description

The STEVAL-ISA147V3 is a digital switch mode AC-DC converter consisting of two power stages: an input semi-bridgeless power factor corrector (SBPFC) controlled by an STM32F051K8, and a regulation stage implemented with an LLC half bridge with synchronous rectification (SR), controlled by an STM32F334C8 microcontroller.

This 500 W AC-DC converter uses the so-called bridgeless PFC topology, with the advantage of lower conduction losses and higher efficiency by eliminating the need for a diode rectifier stage. This choice also allows a reduced component count compared to a standard PFC.

The input stage is typically controlled using an outer voltage loop for bus voltage regulation and an inner control loop to shape the current according to a sinusoidal waveform. The outer loop adjusts the current reference in order to maintain a regulated bus voltage, independent of load or input voltage variations. The output isolation and regulation stage is implemented using a half-bridge LLC topology, operating with constant duty cycle and variable frequency control.

  • All features

    • Input AC voltage: 90 V to 264 V
    • Input AC frequency: 45 Hz to 65 Hz
    • Nominal power: 500 W
    • Output voltage: 12 V
    • Semi-Bridgeless PFC stage
    • DC-DC stage: resonant LLC with synchronous rectification
    • Peak efficiency: 94%
    • PFC switching frequency: 60 kHz
    • DC-DC switching frequency: 80 kHz to 115 kHz (burst mode above)
    • HF transformer isolation voltage: 4 kV
    • Cooling: natural convection up to 300 W, forced cooling above 300 W
    • PFC control: managed by STM32F051K8
    • LLC control: managed by STM32F334C8
    • Input short-circuit protection
    • Input under/overvoltage protection
    • Input under/overfrequency protection
    • DC Bus under/overvoltage protection
    • Output short-circuit protection
    • Output under/overvoltage protection
    • Overtemperature protection
    • RoHS compliant

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
STEVAL-ISA147V3
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CARD Industrial Ecopack2 -

STEVAL-ISA147V3

Package:

CARD

Material Declaration**:

Marketing Status

Active

Package

CARD

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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STM32F334C8; STM32F051K8; STL160N3LLH6; STP57N65M5; STP13NM60ND; STPSC1006D; STTH1L06U
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ST 3A991.a.2 NEC ITALY -

STEVAL-ISA147V3 Active

ECCN (US):
3A991.a.2
Budgetary Price (US$)*/Qty:
-

Part Number:

STEVAL-ISA147V3

Core Product:

STM32F334C8; STM32F051K8; STL160N3LLH6; STP57N65M5; STP13NM60ND; STPSC1006D; STTH1L06U

Supplier:

ST

ECCN (EU):

NEC

Country of Origin:

ITALY

Board production status:

-

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors