IC OFFLINE SWIT PWM SMPS 8SOIC VIPER22A is a switched-mode power supply controller IC manufactured by STMicroelectronics. This article mainly introduces circuit, equivalent, datasheet and other detailed information about STMicroelectronics VIPER22A.
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Sep 6, 2021
Melissa Agnes
How to Install IC VIPER22A to SMPS Correctly
IC OFFLINE SWIT PWM SMPS 8SOIC
VIPER22A is a switched-mode power supply controller IC manufactured by STMicroelectronics. This article mainly introduces circuit, equivalent, datasheet and other detailed information about STMicroelectronics VIPER22A.
VIPER22AS
VIPER22A is a switched-mode power supply controller IC introduced by 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 of a power transformer which when switched will produce the required output voltage based on transformer design.
VIPER22A Pinout
| 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 MOSFET |
VIPER22A Pin Description
●Operating Voltage: 9 Volts – 38 Volts
●Internal Oscillator Frequency: 60 kHz
●Drain to Source Voltage: 730 Volts
●Feedback Current: 3 mA
●Typical Peak Current Limit: 0.7 A
●Off-state Drain Current: 0.1 mA
●Fall Time: 100ns
●Rise Time: 50ns
●Input Feedback Impedance: 1.2 Kohms
●SMPS Switching Controller IC
●AC to DC converter
●Available in PDIP and SO 8-pin Package
STMicroelectronics VIPER22AS technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics VIPER22AS.
STMicroelectronics VIPER22AS technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics VIPER22AS.
| Product Attribute | Attribute Value | |
|---|---|---|
| Mounting Type | Surface Mount | |
| Package / Case | 8-SOIC (0.154, 3.90mm Width) | |
| Surface Mount | YES | |
| Operating Temperature | -40°C~150°C TC | |
| Packaging | Tube | |
| Series | VIPER™ | |
| JESD-609 Code | e0 | |
| Part Status | Obsolete | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | |
| Number of Terminations | 8Terminations | |
| ECCN Code | EAR99 | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Max Power Dissipation | 7W | |
| Terminal Position | DUAL | |
| Terminal Form | GULL WING |
| Product Attribute | Attribute Value | |
|---|---|---|
| Peak Reflow Temperature (Cel) | NOT SPECIFIED | |
| Number of Functions | 1Function | |
| Reach Compliance Code | not_compliant | |
| Frequency | 66kHz | |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED | |
| Base Part Number | VIPER22 | |
| Pin Count | 8 | |
| JESD-30 Code | R-PDSO-G8 | |
| Number of Outputs | 1Output | |
| Qualification Status | Not Qualified | |
| Input Voltage-Nom | 18V | |
| Analog IC - Other Type | SWITCHING REGULATOR | |
| Voltage - Supply (Vcc/Vdd) | 8V~38V | |
| Input Voltage (Min) | 9V | |
| Topology | Flyback |
| Product Attribute | Attribute Value | |
|---|---|---|
| Control Mode | CURRENT-MODE | |
| Output Current-Max | 0.84A | |
| Frequency - Switching | 60kHz | |
| Input Voltage (Max) | 38V | |
| Control Technique | PULSE WIDTH MODULATION | |
| Switcher Configuration | SINGLE | |
| Internal Switch(s) | Yes | |
| Fault Protection | Current Limiting, Over Temperature, Over Voltage | |
| Output Isolation | Isolated | |
| Voltage - Breakdown | 730V | |
| Voltage - Start Up | 14.5V | |
| Length | 4.9mm | |
| Width | 3.9mm | |
| RoHS Status | ROHS3 Compliant | |
| Lead Free | Lead Free |
Example Circuit
As you can see in the example circuit above, the transformer plays an important role in the overall design. It has three coils, namely primary, secondary and auxiliary (the second coil on the primary side). The primary side of the transformer is connected to the rectified power supply voltage through the MOSFET in the Viper controller IC, and the power supply DC will be switched according to the feedback to the IC. The auxiliary coil of the transformer is used to power the Viper IC, and the secondary side of the transformer provides the required output voltage.
| Part Number | Description | Manufacturer |
| KA5L0165R-TUPOWER CIRCUITS | 4 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PSFM4, TO-220F, 4 PIN | Fairchild Semiconductor Corporation |
| FSDM0365RNPOWER CIRCUITS | 12A SWITCHING REGULATOR, 73kHz SWITCHING FREQ-MAX, PDIP8, MS-001BA, DIP-8 | Rochester Electronics LLC |
| TNY256YPOWER CIRCUITS | Switching Controller, Current-mode, 140kHz Switching Freq-Max, PDSO5, TO-220, 5 PIN | Power Integrations |
| FSDM0265RNBPOWER CIRCUITS | Switching Regulator, Current-mode, 8A, 73kHz Switching Freq-Max, PDIP8, MS-001BA, DIP-8 | Fairchild Semiconductor Corporation |
| TNY256PPOWER CIRCUITS | Switching Controller, Current-mode, 140kHz Switching Freq-Max, PDSO8, 0.300 INCH, PLASTIC, MS-001AB, DIP-8 | Power Integrations |
| KA5L0380RPOWER CIRCUITS | Switching Regulator | ON Semiconductor |
| MC33369TPOWER CIRCUITS | Switching Regulator, Voltage-mode, 0.5A, 115kHz Switching Freq-Max, CMOS, PSFM5, TO-220, 5 PIN | Motorola Semiconductor Products |
| TNY268PGPOWER CIRCUITS | Switching Regulator, 0.88A, 140kHz Switching Freq-Max, PDIP7, 0.300 INCH, LEAD-FREE, PLASTIC, MS-001-AB, DIP-8 | Power Integrations |
| TEA1623P/N1,112POWER CIRCUITS | TEA1623P; TEA1623PH - STARplug switched-mode power supply controller IC DIP 8-Pin | NXP Semiconductors |
| TOP209PNPOWER CIRCUITS | Switching Regulator, Voltage-mode, 0.1A, 85kHz Switching Freq-Max, CMOS, PDIP8, PLASTIC, MS-001AB, DIP-8 | Power Integrations |
– 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 condition.
– Overvoltage protection in hiccup mode.
■Used in Low Power Supply Systems
■Used in LED Drivers
■Used in Remote Microcontroller Designs
■Used in SMPS Circuits
■Used in Auxiliary Power Supply
■Used in Industrial Applications
■Used in Battery Chargers
■Used in Automobiles
STMicroelectronics is a French-Italian multinational electronics and semiconductor manufacturer, headquartered in Plan-les-Oates near Geneva, Switzerland.
The company originated from the merger of two state-owned semiconductor companies in 1987: "Thomson Semiconductors" in France and "SGS Microelettronica" in Italy.
It is often referred to as "ST" and is the largest semiconductor chip manufacturer in Europe by revenue. STMicroelectronics corporate headquarters and EMEA regional headquarters are located in Geneva, while the holding company STMicroelectronics N.V. is incorporated in the Netherlands.
The company's US headquarters are located in Koper, Texas. The Asia-Pacific region is headquartered in Singapore, while the Japan and South Korea operations are headquartered in Tokyo. The headquarter of the company in China is in Shanghai.
Download datasheets and manufacturer documentation for STMicroelectronics VIPER22AS.
Download datasheets and manufacturer documentation for VIPER22AS
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