ST ST STEVAL-ISA010V1 Ultra wide range dual output back converter demonstration board based on the VIPER16 Data Manual - User Guide
Summary
This demonstration board provides a robust, non-isolated auxiliary power supply solution using the VIPER16 controller. Designed to operate reliably across an ultra-wide input voltage range of 85 VAC to 500 VAC, it delivers regulated dual outputs of 12V and 5V for low-power applications. The accompanying manual details the complete circuit schematic and PCB layout, making this board highly valuable for electrical engineers developing compact, energy-efficient SMPS solutions required in home appliances and metering equipment.
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STEVAL-ISA010V1
Ultra wide range dual output back converter demonstration board
based on the VIPER16
Data brief
Features Input voltage Vin: 85 - 500 VAC (f: 45 - 66 Hz) Output voltages: V1= 12 V ± 10% V2= 5 V ± 4% Output current: 150 m A total (5 V and 12 V output) output current for full input voltage range Standby: 96 m W at 230 VAC
STEVAL-ISA010V1
Short-circuit protection PCB type and size:
after any fault condition removal. Burst mode
FR4, single side 70 µm
operation at light load combined with the very low
dim.: 27 x 45 mm consumption of the device helps to meet standby
energy-saving regulations.
Isolation: non isolated - N connected to output GND
The significant benefit of this new chip derives EMI: In accordance with EN55022 - class B from the jitter of the switching frequency and the possibility to supply the chip directly from the DC
EMC: surge - IEC 61000-4-5 - 2 k V
HV bus, so auxiliary supply is not mandatory.
EMC: burst - IEC 61000-4-4 - 8 k V
The VIPER16 is suitable for flyback or buck
Ro HS compliant
topologies and thanks to an internal self-supply circuit it does not require an auxiliary supply.
Description This demonstration board based on VIPER16 is designed as an example of a simple non-isolated auxiliary power supply for a range of input voltages from 85 VAC to 500 VAC. There is an ever-increasing demand for small power supplies capable of working without voltage range limitations, even at nominal levels of 400 VAC and 415 VAC, respectively. The real voltage level can reach 500 VAC (415 V + 20%). The major markets for this type of SMPS are home appliances and metering. The VIPER16 device includes an 800 V rugged power switch, a PWM controller, programmable overcurrent, overvoltage, overload, a hysteretic thermal protection, soft-start and safe auto-restart
May 2009 Doc ID 15674 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com
Page Summary Contents For ST ST STEVAL-ISA010V1 Ultra wide range dual output back converter demonstration board based on the VIPER16 Data Manual - User Guide
Manual Details
| Brand | Dual |
|---|---|
| Pages | 4 |
| File Size | 182.76 KB |
| Published | June 05, 2026 |
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Frequently Asked Questions
What input voltage range does this power supply board support?
It supports a wide input voltage range from 85 VAC to 500 VAC, operating at frequencies between 45 and 66 Hz.
What are the primary output specifications for V1 and V2?
The outputs are configured as V1 (12V ± 10%) and V2 (5V ± 4%), providing a combined total current of 150 mA.
Does this device require an external auxiliary power source to run?
No, it does not require an auxiliary supply because of its internal self-supply circuit feature.
What types of protection mechanisms are included on the VIPER16 chip?
It integrates several protections, including short-circuit, overcurrent, overvoltage, overload, and hysteretic thermal protection.