LNK564DG

POWER INTEGRATIONS  LNK564DG  芯片, 交流/直流转换器, 3W, SOIC-7

The is an energy efficient offline Switcher IC replaces all unregulated isolated linear transformer based power supplies up to 3W output power. For worldwide operation, a single universal input design replaces multiple linear transformer based designs. The self-biased circuit achieves an extremely low no-load consumption of under 150mW. The internal oscillator frequency is jittered to significantly reduce both quasi-peak and average EMI. The oscillator incorporates circuitry that introduces a small amount of frequency jitter, typically 5% of the switching frequency, to minimize EMI. The modulation rate of the frequency jitter is set to 1kHz to optimize EMI reduction for both average and quasi-peak emissions. The frequency jitter, which is proportional to the oscillator frequency, should be measured with the oscilloscope triggered at the falling edge of the DRAIN voltage waveform.

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Lowest component count switcher

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Proprietary E-Shield™ transformer eliminates Y-capacitor

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Hysteretic thermal shutdown protection - Automatic recovery improves field reliability

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Universal input range allows worldwide operation

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Simple ON/OFF control, no loop compensation needed

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Easily meets all global energy efficiency regulations with no added components

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ON/OFF control provides constant efficiency to light loads - ideal for mandatory CEC regulations

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High bandwidth provides fast turn on with no overshoot and excellent transient load response

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Auto-restart reduces delivered power by >85% during short circuit and open loop fault conditions

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No-load consumption <150mW at 265VAC input

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Feedback input circuit

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Over temperature Protection

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5.8V Regulator and 6.3V shunt voltage clamp