VIPER12A-E STMicroelectronics, VIPER12A-E Datasheet - Page 8

• Manufacturer Part Number: VIPER12A-E
• Description: Fixed frequency off line converter
• Manufacturer: STMicroelectronics

Specifications of VIPER12A-E

• Constant Current Output: 350 mA, 700 mA, 1.05 A (selectable)
• Input Voltage Range: 90 to 264 VAC 50/60 Hz

Wide range of VDD voltage
5
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Wide range of V
The V
design to achieve various behaviors. In
chosen to supply the device with two benefits:
●
●
As soon as the device starts switching, it immediately receives some energy from the
auxiliary winding. C5 can be therefore reduced and a small ceramic chip (100 nF) is
sufficient to insure the filtering function. The total start up time from the switch on of
input voltage to output voltage presence is dramatically decreased.
The output current characteristic can be maintained even with very low or zero output
voltage. Since the TSM101 is also supplied in forward mode, it keeps the current
regulation up whatever the output voltage is.The V
the input voltage, that is to say with a ratio of about 4 for a wide range application.
DD
pin voltage range extends from 9 V to 38 V. This feature offers a great flexibility in
DD
Doc ID 11977 Rev 2
voltage
Figure 4 on page 7
DD
pin voltage may vary as much as
a forward configuration has been
VIPER12A-E