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Introduction
The power board STEVAL-ISF001V2 is a 3 kW PFC designed for industrial and domestic
applications. The board must be used for demonstration purposes in order to evaluate the
potential of the FOT (fixed-off-time control, patented by ST) to implement a high-power PFC
with performance comparable to a standard continuous-mode PFC, but using a simpler
controller chip originally designed for TM (transition-mode) PFC operating conditions. This
demonstration board works directly from the AC mains supply in the single range voltage
(185 Vrms - 265 Vrms) and provides a 400 V stable and regulated DC bus output capable of
a maximum of 7.5 A.
The low voltage necessary to supply the driver is generated by an auxiliary winding on the
main inductor, so an external power supply is not needed to start the operation of the board.
The design is:
■
quick to set up and install
■
re-usable (the Gerber files are available for free)
■
ready for downsizing if required.
Note:
Please read
Figure 1.
Line, inductor, switch and diode
current in FF-CCM PFC
December 2012
STEVAL-ISF001V2, 3 kW FOT PFC board
Section 2
of this manual before attempting any operation.
AM01972v1
Doc ID 15337 Rev 2
based on the L6563S
Figure 2.
Line, inductor, switch and diode
current in TM PFC
UM0673
User manual
AM01980v1
www.st.com
1/19
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Related Manuals for ST STEVAL-ISF001V2
Summary of Contents for ST STEVAL-ISF001V2
- Page 1 L6563S Introduction The power board STEVAL-ISF001V2 is a 3 kW PFC designed for industrial and domestic applications. The board must be used for demonstration purposes in order to evaluate the potential of the FOT (fixed-off-time control, patented by ST) to implement a high-power PFC with performance comparable to a standard continuous-mode PFC, but using a simpler controller chip originally designed for TM (transition-mode) PFC operating conditions.
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Page 2: Table Of Contents
PFC board connection ........7 STEVAL-ISF001V2 description ....... . . 7 STEVAL-ISF001V2 circuit description . -
Page 3: Board Description
UM0673 Board description Board description The STEVAL-ISF001V2 can be used for several kinds of applications: ● Inverter for motor control ● Air conditioning system ● Welding machine DC power supply section. This demonstration board offers customization options as well, making it an excellent choice as an original platform for a more complete and dedicated system. -
Page 4: Safety And Operating Instructions
Safety and operating instructions UM0673 Safety and operating instructions General During assembly and operation the 3 kW FOT PFC board poses several inherent hazards including bare wires and hot surfaces. If the board or its components are improperly used or installed incorrectly, there is danger of serious personal injury and damage to property. -
Page 5: Electronic Connection
Hardware layout Figure 4. Power board 3 kW FOT PFC STEVAL-ISF001V2 (top view) AM01974v1 The mains input connector is present on the right side of the board. Connect a sinusoidal supply voltage with amplitude in the range of 185 Vrms to 265 Vrms. The power source has to be able to supply the power required by the system, according to the output load the user intends to connect on the output port. -
Page 6: Environmental Considerations
It is preferable to test the kit in ambient temperature not higher than 45 degrees Celsius. Environmental considerations The STEVAL-ISF001V2 must only be used in a power laboratory. The high voltage involved in the system presents a serious shock hazard. If the board is to be used to measure or capture waveforms or any other interaction between the board and laboratory equipment, an AC-isolated power supply has to be used. -
Page 7: Pfc Board Connection
STEVAL-ISF001V2 description The demonstration board STEVAL-ISF001V2 developed by STMicroelectronics provides a compact, and ready-to-use solution for the implementation of a simple PFC system able to supply load with power close to the maximum delivered in most typical domestic installations. -
Page 8: Steval-Isf001V2 Circuit Description
● Driver with inductor saturation detection ● Optimized EMC input filter. STEVAL-ISF001V2 circuit description Figure 5 shows the entire electronic schematic. Starting from the input section, a common-mode EMC filter is fitted in order to be compliant with the EMC regulations concerning industrial and domestic applications. (EN55014 and EN55022). - Page 9 UM0673 PFC board connection The chosen switching devices are two power MOSFETs, MDmesh™ V family, STW88N65M5. These two power MOSFETs placed in parallel assure a low R , limiting DS(on) the conduction power losses. Good efficiency and good thermal behavior of the system can be reached. To properly drive the power MOSFET and to minimize switching losses, during the on and off transient, a small push-pull driver was interposed between the driver and the two gates.
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Page 10: Bom And Schematics
BOM and schematics UM0673 BOM and schematics Table 1. Bill of material Item Reference Part 0.22 μF 300Vac X2 C2,C4 10 nF Y2 2.2 μF 300Vac X2 220 nF 630 V C6,C8 330 μF 450 V 18 nF 1μF 100 nF 470 nF 50 V 47 μF 50 V 680 pF... - Page 11 UM0673 BOM and schematics Table 1. Bill of material (continued) Item Reference Part BC557 NTC 1 Ω 26 mm (ex. SIEMENS S464) 470 kΩ 1/2 W 22 Ω 1 W R3,R4 560 kΩ 120 kΩ 10 kΩ R7,R13 150 kΩ 47 kΩ...
- Page 12 BOM and schematics UM0673 Figure 5. Schematic of the STEVAL-ISF001V2 board 1929.0001 400 Vout 1951.0001 400 Vout 400 Vout AM01975v1 12/19 Doc ID 15337 Rev 2...
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Page 13: Experimental Measurements
UM0673 Experimental measurements Experimental measurements Table below shows the performance of the PFC board during lab testing. Table 2. Lab preliminary electrical measurements 185 Vac 230 Vac 265 Vac Vout Iout 0.75 0.75 0.75 Pout Low-power range Efficiency (%) 96.5% 96.2% 0.971 0.964... - Page 14 Experimental measurements UM0673 Figure 6. Common-mode inductor L1 (MAGNETICA 1745.0005) technical sheet 1745.0005 STP 03 Product Technical Specification Code: Product: Common Mode Inductor 2x2mH 18A STMicroelectronics Customer: Customer Code: YPICAL APPLICATION ECHNICAL DATA AC/DC ISTURB SUPPRESSION ON POWER LINE OF (1-4=2-3) NDUCTANCE 270V...
- Page 15 UM0673 Experimental measurements Figure 7. Common-mode inductor L2 (MAGNETICA 1951.0001) technical sheet 1951.0001 STP 03 Product Technical Specification Code: Product: Common Mode Inductor 2x220uH/18A ST Microelectronics Customer: Customer Code: TYPICAL APPLICATION TECHNICAL DATA AC/DC 270V SUPPRESSION ON POWER LINE OF...
- Page 16 Experimental measurements UM0673 Figure 8. Common-mode inductor L3 (MAGNETICA 1929.0001) technical sheet 1929.0001 STP 03 Product Technical Specification Code: Product: Common Mode Inductor 2x30uH/8A STMicroelectronics Customer: Customer Code: YPICAL APPLICATION ECHNICAL DATA AC/DC ISTURB SUPPRESSION ON POWER LINE OF (1-4=2-3) NDUCTANCE 400V 20°...
- Page 17 UM0673 Experimental measurements Figure 9. Boost inductor with auxiliary winding, T1 (MAGNETICA 1922.0001) technical sheet 1922.0001 STP 04 Product Technical Specification Code : Product: PFC Inductor 1.5mH 13A STMicroelectronics Customer Code: Customer: YPICAL PPLICATION ECHNICAL NDUCTOR FOR OOST AND OOST DC NDUCTANCE CONVERTER SUITABLE ALSO IN HALF...
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Page 18: Revision History
Revision history UM0673 Revision history Table 3. Document revision history Date Revision Changes 24-Sep-2009 Initial release. – Modified BOM inTable Figure 5 Table 19-Dec-2012 – Modified: accordingly to – Updated title on the cover page and other minor text changes. 18/19 Doc ID 15337 Rev 2... - Page 19 No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein.
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