VIPer12A Datasheet – OFF Line SMPS Primary Switcher IC
Low Power Offline SMPS Primary Switcher
Package 8 Pin DIP
VIPER12A overview
The VIPER12A combines a dedicated current mode PWM controller with a high voltage power MOSFET on the same silicon chip. Typical applications cover offline power supplies for battery charger adapters, standby power supplies for TV or monitors, auxiliary supplies for motor control, etc.
The internal control circuit offers the following benefits: Large input voltage range on the VDD pin accommodates changes in auxiliary supply voltage (This feature is well adapted to battery charger adapter configurations), automatic burst mode in low load conditions, and overvoltage protection in HICCUP mode.
| Part Number | VIPer12A, VIPer12ADIP, VIPer12AS |
| Function | Low Power Offline SMPS Primary Switcher |
| Package | 8 Pin DIP |
| Manufacturer | STMicroelectronics |
| Datasheet | Download PDF  |
Datasheet
viper12a-datasheet.pdf
VIPER12A features
- The large input voltage Range
- Automatic burst mode in low load conditions.
- Overvoltage protection in hiccup mode
- Current mode control
- Auxiliary Undervoltage lockout with hysteresis
- High voltage start-up current source
- Fixed 60 kHz switching frequency
VIPER12A pinout
| Pin | Name | Description |
|---|---|---|
| 4 | VDD | Feedback input. The useful voltage range extends from 0 V to 1 V and defines thepeak drain MOSFET current. The current limitation, which corresponds to thethe maximum drain current is obtained for a FB pin shorted to the SOURCE pin |
| 1,2 | SOURCE | Power MOSFET source and circuit ground reference. |
| 5,6,7,8 | DRAIN | Power MOSFET drain. Also used by the internal high-voltage current source duringstart-up phase for charging the external VDD capacitor. |
| 3 | FB | Feedback input. The useful voltage range extends from 0 V to 1 V and defines thepeak drain MOSFET current. The current limitation, which corresponds to themaximum drain current is obtained for a FB pin shorted to the SOURCE pin |
Absolute maximum ratings
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Switching drain source voltage (TJ = 25 … 125 °C) (1) | VDS(sw) | -0.3 … 730 | V |
| Start-up drain-source voltage (TJ = 25 … 125 °C) (2) | VDS(st) | -0.3 … 400 | V |
| Continuous drain current | ID | Internally limited | A |
| Supply voltage | VDD | 0 … 50 | V |
| Feedback current | IFB | 3 | mA |
| Electrostatic discharge:Machine model (R = 0 Ω; C = 200 pF) Charged device model | VESD | 2001.5 | VkV |
| Junction operating temperature | TJ | Internally limited | °C |
| Case operating temperature | TC | -40 to 150 | °C |
| Storage temperature | Tstg | -55 to 150 | °C |
VIPER12A applications
- AC/DC converters
- LED lighting drivers
- Battery chargers
- Power supplies
More about VIPER12A
VIPer12A Absolute Maximum Rating
- This parameter applies when the start-up current source is OFF. This is the case when the VDD voltage has reached VDDon and remains above VDDoff.
- This parameter applies when the start-up's current source is ON. This is the case when the VDD voltage has not yet reached VDDon or has fallen below VDDoff
Comments 0
Leave a comment