Key facts
- Brand
- STMicroelectronics
- Model
- VIPER12A
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2012-08-06
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AN2063 VIPer12A Low Standby Power Application Note
The document presents an application note (AN2063) detailing how to build a battery charger with ultra-low standby power dissipation using the VIPerX2A family, specifically the VIPer12A. The solution achieves typical efficiencies of 72% and reduces no-load power consumption to approximately 50mW at 100Vdc input by utilizing burst mode operation.
The note provides a complete circuit description including PCB layout guidelines for minimizing electromagnetic emissions, a general fly-back regulator schematic, and specific design solutions for energy saving such as optimized voltage sources for optocouplers and snubber configurations. It includes performance results regarding load regulation, line regulation, efficiency curves, and transformer specifications.
STMicroelectronics VIPER12A specifications
| Input Voltage Range | 90-264 VAC |
|---|---|
| Input Frequency | 50/60 Hz |
| Main Output Voltage (Variant 1) | +15V |
| Second Output Current (Variant 1b) | 60mA |
| Total Maximum Output Power | 1.6W |
All STMicroelectronics VIPER12A documents by type
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
How much power does the unit consume at no load with a 380Vdc input?
The standby power is around 82mW when using a TL431 reference.
What is the purpose of this reference board?
It can be used to produce a single, non isolated positive or negative voltage for auxiliary power supplies.
Which monolithic device is the converter based on?
The converter is dedicated for building an auxiliary power supply based on the VIPer12AS monolithic device.