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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.主要特性
- 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
| 产品型号 | 供货状态 | 封装 | 等级规格 | 符合RoHS级别 | WEEE Compliant | Material Declaration** |
|---|---|---|---|---|---|---|
| STEVAL-ISA147V3 | 批量生产 | CARD | 工业 | Ecopack2 | - | |
STEVAL-ISA147V3
Package:
CARDMaterial Declaration**:
(**) 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.
