STEVAL-ISA135V1
4 W, 12 V output, isolated flyback converter using VIPer™ Plus -
VIPER06HS
Data brief
Features
• AC main input voltage: VIN 85 VAC - 26 5 VAC
• Main frequency: fL 50 Hz - 60 Hz
• Output volta ge: VOUT 12 V
• Max output current: IOUT 333 mA
• Precision of output regulation:
ΔVOUT_LF ±5 %
• High frequency output voltage ripple:
ΔVOUT_HF 50 mV
• Min active mode efficiency: ηAV 71 %
• Max ambient operating temperature:
TAMB 60 ºC
• Thermal shutdown with hysteresis
• Delayed overload protection
• Open loop failure protection (if auxiliary
winding is used)
• RoHS compliant
Description
The STEVAL-ISA135V1 is a 12 V - 4 W power
supply in isolated flyback topology based on the
VIPer06HS, a new offline high voltage converter
having, as main features: 800 V avalanche
rugged power section, PWM operation at 115
kHz with frequency jittering for lower EMI, cycle-
by-c ycle curr ent lim it with adjustable set point,
on-board soft-start and safe auto-restart after a
fault condition.
May 2014 DocID025243 Rev 2 1/4
For further information contact your local STMicroelectronics sales
office www.st.com
Schematic diagram
STEVAL-ISA135V1
1 Schematic diagram
Figure 1: STEVAL-ISA135V1 circuit sche mat ic
2/4 DocID025243 Rev 2
STEVAL-ISA135V1
Revision history
2 Revision history
Table 1: Document rev isio n history
Date Version Change
02-Oct-2013 1 Initial release.
08-May-2014 2 Title has been updated.
DocID025243 Rev 2 3/4
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4/4 DocID025243 Rev 2