STEVAL-ISA035V1
Non-isolated offline power supply demonstration board based on the VIPER22A-E
Data Brief
Features
Input voltage range 85 Vac to 264 Vac Input voltage frequency 50/60 Hz Lowest possible component count Integrated thermal overload protection No-load consumption around 200 mW 70% to 80% efficiency at full load Integrated short-circuit protection STEVAL-ISA035V1 The same board can be used for any output voltage from 10 V to 35 V. For more design detail, please refer to application note AN1357.
Description
Many appliances today use non-isolated power supplies to furnish the low output power required to run a microcontroller, LED display, and relays or AC switches. This type of power supply has a single rectifier to reference the neutral to output ground in order to fire TRIACs or AC switches. This demonstration board can use the VIPER12A-E or the VIPER22A-E which are pinfor-pin compatible and can supply power for many applications. The VIPER12A-E is used for 12 V at 200 mA and 16 V at 200 mA, while the VIPER22A-E is used for 12 V at 350 mA and 16 V at 350 mA:
Output version 1: VIPER22ADIP-E 12 V at 350 mA 4.2 W Output version 2: VIPER12ADIP-E 12 V at 200 mA 2.4 W Output version 3: VIPER22ADIP-E 16 V at 350 mA 5.6 W Output version 4: VIPER12ADIP-E 16 V at 200 mA 3.2 W
September 2008
Rev 1
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www.st.com 4
For further information contact your local STMicroelectronics sales office.
Circuit schematic
STEVAL-ISA035V1
1
Circuit schematic
Figure 1. Schematic for 12 V at 350 mA
Figure 2.
Schematic for 16 V at 350 mA
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STEVAL-ISA035V1
Revision history
2
Revision history
Table 1.
Date 15-Sep-2008
Document revision history
Revision 1 Initial release. Changes
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STEVAL-ISA035V1
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