VIPER12A-E STMicroelectronics, VIPER12A-E Datasheet - Page 7

• 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

VIPER12A-E
4
Rectangular U-I output characteristics
Figure 4.
A complete regulation scheme can achieve combined and accurate output characteristics.
Figure 4.
device offers two operational amplifiers and a voltage reference, thus allowing the regulation
of both output voltage and current. An integrated OR function performs the combination of
the two resulting error signals, leading to a dual voltage and current limitation, known as a
rectangular output characteristic. This type of power supply is especially useful for battery
chargers where the output is mainly used in current mode, in order to deliver a defined
charging rate. The accurate voltage regulation is also convenient for Li-ion batteries which
require both modes of operation.
presents a secondary feedback through an optocoupler driven by a TSM101. This
Rectangular U-I output characteristics for battery charger
Doc ID 11977 Rev 2
Rectangular U-I output characteristics
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