Power Supply For Ultra High-Fidelity Audio Amplifier LME49810, LME49811, LME49830

This application note will cover the design of a ±72V unregulated power supply designed specifically for the LME49810, LME49811 and LME49830 high-fidelity audio amplifier modules. The output power of the modules are approximately 220W to 250W into 8Ω and 350W to 400W into 4Ω. Complete documentation for the amplifier modules can be found in the documents listed below. AN-1625 LME49810TB

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900W PFC Circuit

This PFC circuit is designed using Power Integration’s HiperPFS PFS729EG integrated PFC controller. This design is rated for a continuous output power of 900 W and provides a regulated output voltage of 380 VDC nominal maintaining a high input power factor and overall efficiency from light load to full load. 4.1 Input EMI Filtering and Rectifier Fuse F1 provides protection

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65W Laptop Power Adapter Circuit Diagram

The schematic in Figure 1 depicts a notebook adapter power supply employing the Power Integrations® TOPSwitch®-HX TOP258EN off-line switcher in a fl yback configuration. This power supply operates from a universal input to provide a 19 V, 65  output capable of operation in a sealed enclosure at an ambient temperature of up to 40 °C. The TOP258EN (U1) has an

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NTC For Power Supply

NTC Thermistor devices are made of a specially formulated metal oxide ceramic material which is capable of suppressing high current surges. TP type NTC devices, being of relatively high resistance, shall limit the inrush current for 1~2 seconds during which time the device decreases in resistance substantially to a point where its voltage drop is negligible. The devices are especially

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