TNY266PN Power Integrations IC (Enhanced EcoSmart Low-Power Off-Line Switcher)

Restore, upgrade, or engineer highly efficient power conversion systems with the premium TNY266PN Power Integrations IC. Belonging to the renowned TinySwitch-II family, this monolithic off-line switching integrated circuit combines a high-voltage power metal-oxide-semiconductor field-effect transistor (MOSFET), an internal oscillator, a high-voltage switched current source, and robust system protection circuitry onto a single compact 8-pin dual-inline package.

Designing classic line-frequency linear transformers or discrete component switching supplies results in bulky enclosures, high standby power consumption, and fragile component tracking loops. This IC eliminates those engineering inefficiencies by integrating all critical timing, startup, and power switching controls directly into the silicon layout. It serves as the definitive semiconductor choice for cell phone chargers, standby power supplies for appliances, small consumer electronics adapters, and isolated industrial control boards.

Key Features

• Integrated EcoSmart Energy Efficiency: Engineered with advanced energy-saving parameters that drastically minimize power consumption during no-load and standby conditions, meeting global eco-design standards effortlessly.

• Fully Self-Biased Startup Circuitry: Built with an internal high-voltage current source that draws power straight from the high-voltage direct-current bus line, completely removing the need for a dedicated transformer bias winding and associated circuitry.

• Onboard Jittering Frequency Oscillator: Programmed with an internal switching frequency modulation technique that spreads electromagnetic interference across a wider band, reducing the size and cost of external filtering components.

• Comprehensive Multi-Stage Thermal Armor: Fully guarded with built-in hardware protection circuits, including an auto-restart loop for short-circuit faults and a thermal shutdown feature that cuts operation during high-temperature conditions.

• Rugged 700 Volt Power MOSFET Section: Staged with a heavy-duty internal power transistor capable of safely withstanding transient line spikes up to 700 Volts peak limits.

• Seamless Customization Support: Built on an exceptionally flexible semiconductor blueprint. If your specialized commercial repair or production run requires specific bulk packaging counts, matching transformer schematics, or tailored circuit board footprints, we can easily source and configure the components to fit your exact blueprint specifications.

Technical Specifications

Pinout Configuration & Mapping Blueprint

The TNY266PN utilizes a streamlined 8-pin arrangement (with Pin 6 removed by design for high-voltage isolation clearance) to ensure rapid, error-free integration into your power supply layouts:

• Pin 1 (EN/UV - Enable / Under-Voltage): This pin dual-functions as a control loop input and line voltage sense node. Sinking current from this pin stops switching cycles, managing the regulation loop smoothly.

• Pin 2 (BP - Bypass): Connection point for an external multi-microfarad capacitor that stabilizes the internal 5.8 Volt regulated supply rail.

• Pin 3 (Pin Removed): Cut at the factory to provide maximum spatial isolation tracking between low-voltage control pins and high-voltage nodes.

• Pin 4 (D - Drain): The power MOSFET drain connection. Connects directly to the primary winding of your high-frequency switching transformer, providing internal startup current.

• Pins 5, 7, & 8 (S - Source): Mapped together to form the common circuit ground reference. These pins also serve a critical structural role by conducting heat away from the silicon die straight into the circuit board copper tracks.

Common Applications

• Compact Low-Power Wall Adapters: Form the primary power switcher inside sleek, lightweight wall chargers for mobile devices, personal grooming tools, and digital media receivers.

• Standby Power Modules for Major Appliances: Provide highly stable, low-noise overnight auxiliary power lines to run microcontrollers, front panel displays, and sensor nets inside smart refrigerators, washing machines, and air conditioners.

• Industrial Relay Control Supplies: Step down high-voltage utility lines smoothly to generate isolated 5V, 12V, or 24V direct-current rails to safely trip coils on heavy multi-channel industrial relay shields.

• Educational Academic Engineering Laboratories: An exceptional, highly illustrative semiconductor asset for introducing advanced vocational electronics students to flyback topologies, high-frequency rectification, and power regulation math profiles.

Package Includes:

• 1 x TNY266PN Power Integrations IC (Standard DIP-8B Profile)