TDA7294 IC 100 watts Audio power amplifier High-Power Audio Amplifier IC TDA 7294 IC TDA7294-MultiwAtt-15

Product Overview

The TinySwitch-III family, manufactured by Power Integrations, is an energy-efficient, low-power, off-line switching IC designed to simplify power supply design by integrating the power MOSFET, controller, and protection circuitry into a single monolithic device. It is engineered to provide a compact, cost-effective solution for various power supply applications.

Core Specifications

• Manufacturer: Power Integrations.

• Control Method: Utilizes a simple, high-bandwidth ON/OFF control scheme that eliminates the need for loop compensation.

• Integrated Power MOSFET: Features a high-voltage 700 V power MOSFET, oscillator, high-voltage switched current source, and control circuitry.

• Power Capability: Offers user-selectable current limits via the BP/M pin capacitor, allowing the device to be tailored to specific power requirements.

• Efficiency: Designed for high energy efficiency, supporting extremely low no-load power consumption—under 150 mW without a bias winding, or under 50 mW when using one.

Features

• EMI Reduction: Employs frequency jittering (modulated by ~8 kHz) to reduce electromagnetic interference (EMI) and lower the cost of the input filter.

• Self-Biasing: Draws operating current directly from the DRAIN pin, removing the need for an external bias winding and associated supply components.

• Safety & Protection:

  • Auto-Restart: Provides full protection during short-circuit and open-loop fault conditions by disabling switching for 2.5 seconds before attempting a restart.

  • Thermal Shutdown: Features integrated thermal shutdown with a 142°C threshold and significant hysteresis (75°C) to ensure robust thermal protection.

  • Output Overvoltage Protection (OVP): Can be configured to latch off the output in the event of an overvoltage condition using a Zener diode.

• Adaptive Switching: Automatically adjusts the switching cycle to maintain regulation at low input voltages, effectively reducing bulk capacitance requirements.

Applications

• Auxiliary Power Supplies: Ideal for use in PC standby supplies and various industrial auxiliary power applications.

• Chargers and Adapters: Suited for compact, low-power chargers, adapters for consumer electronics, and portable devices.