The?VIPER22A?is a Popular?SMPS controller IC?form STMicroelectronics that has been extensively used in?AC to DC Converters?in offline power circuit designs. This controller IC consists of an in-built PWM controller with a power MOSFET.? The MOSFET is connected to the primary side a power transformer which when switched will produce the required output voltage based on transformer design.
Pin Configuration?
| Pin Number | Pin Name | Description |
| 1,2 | Source | Source pin of the switching MOSFET |
| 3 | Feedback | Feedback for the SMPS circuit |
| 4 | VDD | Vdd voltage 9V to 38V |
| 5,6,7,8 | Drain | Drain pin of the switching MOSET |
VIPER22A Specifications
- SMPS Switching Controller IC
- AC to DC converter
- Operating Voltage: 9V to 38V
- Oscillator Frequency: 60 kHz typically
- Mosfet Drain to Source Voltage: 730V
- Off state drain current: 0.1mA
- Rise time and Fall time 50ns and 100ns respectively
- Available in PDIP and SO 8-pin package
Equivalent for VIPER22A:?VIPER12A, AP8012