VIPer22A Low Power OffLine SMPS Switcher IC DIP-8

VIPer22A Low Power Off-Line SMPS Switcher IC DIP-8 is a high-performance, integrated solution designed to simplify the construction of offline flyback converters for switch-mode power supplies (SMPS). This IC ingeniously combines a high-voltage power MOSFET and a dedicated PWM control circuit into a single, compact DIP-8 package. By integrating the two most critical components of an SMPS, the VIPer22A significantly reduces the required external component count, minimizes board space, and lowers the overall system cost. Engineers rely on this device to design highly reliable and energy-efficient power supplies ranging from 10W up to 20W, making it the industry standard for auxiliary power in appliances and compact wall adapters.

Key Features:

• Integrated Power MOSFET: Includes a dedicated high-voltage power MOSFET on the same die, directly handling the primary side switching.
• Fixed Frequency PWM: Operates at a fixed switching frequency (typically 60 kHz), which simplifies filter design and control loop stabilization.
• Low Standby Power: Features burst-mode operation at light load, dramatically reducing standby power consumption to meet modern energy efficiency standards.
• Built-in Protection Features: Integrates comprehensive protection, including over-temperature protection, overcurrent protection, and input voltage under-voltage lockout (UVLO).
• Auxiliary Supply Simplification: The IC can draw power directly from the high-voltage input during startup, simplifying the auxiliary winding requirements in many designs.
• Wide Input Voltage Range: Works efficiently across a broad range of input voltages, making it suitable for universal AC input adapters.

Technical Specifications:

• Topology: Isolated Flyback Converter
• Integrated MOSFET Voltage (V_DSS): 700 V (Typical)
• Switching Frequency (f_SW): Typically 60 kHz (Fixed)
• Maximum Output Power: Up to 12 W (Universal AC Input) or 20 W (195 V – 265 V AC Input)
• Supply Voltage (V_DD): 9 V to 15 V
• Startup Current: Very Low (Microamperes)
• Package Type: DIP-8 (Dual In-line Package)

Mechanical Specifications:

• Pin Count: 8 Pins
• Mounting: Through-Hole (DIP)
• Material: Molded plastic body with lead-frame pins.

Dimensions:

• Length (Body): ~9.2 mm
• Width (Body): ~6.4 mm
• Pin Pitch (Spacing between pins): 2.54 mm (0.1 in)
• Row Spacing: ~7.62 mm (0.3 in)

Pinout and Wiring:

• Pin 1, 2, 7, 8 (DRAIN): Connect to the primary winding of the transformer. These pins are internally connected to the integrated MOSFET drain.
• Pin 3 (FB – Feedback): Connect an external voltage divider or optocoupler to this pin to regulate the output voltage.
• Pin 4 (GND): Connect to the circuit ground and the source of the internal MOSFET.
• Pin 5 (V_DD – Power Supply): Connect to the auxiliary winding output, which powers the control section of the IC after startup.
• Pin 6 (NC – No Connection): This pin is internally unconnected and is typically left floating.
• Wiring Note: The main switching element is inside the chip. You only need to connect the DRAIN pins to the transformer and use the FB pin for controlling the output voltage through an optocoupler feedback loop.

Datasheet Reference:

• Download Datasheet

Commonly Used in:

• Consumer Electronics: The power supply heart for small TV decoders, multimedia players, and low-power audio equipment.
• Home Appliances: Auxiliary power supplies for control boards in washing machines, refrigerators, and air conditioners.
• Wall Adapters: Compact and reliable power bricks for charging smartphones, tablets, and small electronic devices.

Applications:

• AC-DC Converters: Build isolated power supplies for low-to-medium power loads.
• Auxiliary Power Supplies: Provide standby power and control voltage to microcontrollers in complex systems.
• LED Lighting Drivers: Efficiently drive non-dimmable LED light fixtures that require constant current control.

Equivalent Models:

• TNY266-268 (TinySwitch Family): A very popular alternative series from Power Integrations, offering similar levels of integration and efficiency.
• LNK304-306 (LinkSwitch Family): Another series from Power Integrations, often used for non-isolated buck or buck-boost topologies for lower power applications.

Package Includes:

• 1 x VIPer22A Low Power Off-Line SMPS Switcher IC DIP-8