VIPER12AS STMicroelectronics, VIPER12AS Datasheet - Page 2

• Manufacturer Part Number: VIPER12AS
• Description: IC OFFLINE SWIT PWM SMPS 8SOIC
• Manufacturer: STMicroelectronics
• Series: VIPER™r

Specifications of VIPER12AS

• Output Isolation: Isolated
• Frequency Range: 54 ~ 66kHz
• Voltage - Input: 8 ~ 50 V
• Voltage - Output: 730V
• Power (watts): 5W
• Operating Temperature: 25°C ~ 125°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• For Use With: 497-6413 - BOARD EVAL VIPER12A LP AC/DC497-4932 - BOARD POWER SUPPLY 1.8W VIPER12A497-4931 - BOARD 6W DUAL OUTPUT VIPER12A497-4930 - BOARD 6W SINGLE OUTPUT VIPER12A
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3102

VIPer12ADIP / VIPer12AS
PIN FUNCTION
CURRENT AND VOLTAGE CONVENTIONS
CONNECTION DIAGRAM
2/15
SOURCE
DRAIN
Name
V
FB
DD
Power supply of the control circuits. Also provides a charging current during start up thanks to a high
voltage current source connected to the drain. For this purpose, an hysteresis comparator monitors the
V
- V
current source.
- V
source.
Power MOSFET source and circuit ground reference.
Power MOSFET drain. Also used by the internal high voltage current source during start up phase for
charging the external V
Feedback input. The useful voltage range extends from 0V to 1V, and defines the peak drain MOSFET
current. The current limitation, which corresponds to the maximum drain current, is obtained for a FB pin
shorted to the SOURCE pin.
DD
DDoff
DDon
SOURCE
SOURCE
voltage and provides two thresholds:
: Voltage value (typically 14.5V) at which the device starts switching and turns off the start up
: Voltage value (typically 8V) at which the device stops switching and turns on the start up current
VDD
FB
V
1
2
3
4
DD
I
DD
SO-8
V
FB
I
DD
FB
capacitor.
8
7
6
5
VIPer12A
FB
DRAIN
DRAIN
DRAIN
DRAIN
VDD
CONTROL
Function
SOURCE
DRAIN
SOURCE
SOURCE
VDD
FB
1
2
3
4
I
D
V
DIP8
D
8
7
6
5
DRAIN
DRAIN
DRAIN
DRAIN