Mfr Part #:

VIPER22A

The ST VIPER22A is a low power off-line SMPS primary switcher featuring current mode control and a wide VDD voltage range. It operates at a fixed 60 kHz switching frequency.

✓ Total Stock: 26,856 pcs

$ Price Range: $2.95

VIPER22A Available from 2 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Fe Components ✓ Non-Authorised Inventory information	24,856 pcs On Request	24856 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Smaxon Electronics ✓ Non-Authorised Inventory information	2,000 pcs On Request	2000 pcs	On Request	1	On Request	On Request	19+	On Request	On Request

VIPER22A Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	STMicroelectronics
Protection Features	Overtemperature, Overcurrent and Overvoltage Protection with Autorestart

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VIPER22A Description

Short technical summary and product information.

The ST VIPER22A is an integrated circuit designed for low power off-line Switched-Mode Power Supply (SMPS) applications. It combines a current mode PWM controller with a high voltage Power MOSFET on a single chip.

Key electrical specifications include a fixed 60 kHz switching frequency and a wide VDD voltage range of 9V to 38V. The device incorporates features such as auxiliary undervoltage lockout with hysteresis, a high voltage start-up current source, and comprehensive protection against overtemperature, overcurrent, and overvoltage conditions with autorestart.

Typical power capabilities vary with input voltage and package type. For European mains (195-265 Vac), it offers 12W (SO-8) to 20W (DIP-8). For US/Wide range mains (85-265 Vac), it provides 7W (SO-8) to 12W (DIP-8).

The VIPER22A is available in SO-8 and DIP-8 packages, suitable for various off-line power supply designs including battery charger adapters and standby power supplies.

VIPER22A Quick Information

Product Type: SMPS Primary Switcher

Canonical Name: VIPER22A Low Power Off-Line SMPS Primary Switcher

Subcategory: Voltage Regulators

VIPER22A Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

VIPER22A Estimated Pricing

Qty	Low	High
1+	$2.95	$2.95

Estimated market price range - modelled values for guidance only, not live distributor offers.

VIPER22A Features

Fixed 60 kHz switching frequency.
Wide 9V to 38V VDD voltage range.
Current mode control PWM.
Integrated high voltage MOSFET.
Overtemperature, overcurrent, overvoltage protection.

VIPER22A Applications

Off-line power supplies.
Battery charger adapters.
Standby power supplies.
Auxiliary power supplies.

VIPER22A FAQs

6 frequently asked questions generated from this part’s specifications.

What is the switching frequency of the VIPER22A?

The VIPER22A has a fixed switching frequency of 60 kHz.

What is the operating voltage range for the VDD pin on the VIPER22A?

The VDD voltage range for the VIPER22A is from 9V to 38V.

What type of control mode does the VIPER22A use?

The VIPER22A uses current mode control.

What protection features are included in the VIPER22A?

The VIPER22A includes overtemperature, overcurrent, and overvoltage protection with autorestart.

What are the typical power capabilities for the VIPER22A?

For European mains (195-265 Vac), power capability is 12W (SO-8) to 20W (DIP-8). For US/Wide range mains (85-265 Vac), it is 7W (SO-8) to 12W (DIP-8).

What are the VDD turn-on and turn-off voltages for the VIPER22A?

The typical VDD turn-on voltage is 14.5V and the typical turn-off voltage is 8V.