Applications

• Chargers for cell/cordless phones, PDAs, power tools, MP3/portable

audio devices, shavers, etc.

• Standby power supply for TV, video displays, and appliances

Description

The LinkZero™-LP controller incorporates new technology which

enables the device to automatically enter into and wake up from

no-load mode or with 1 mW load while taking less than 5 mW from the

AC power. IEC 62301 specifies measurements of standby power to a

minimum accuracy of 10 mW, and so LinkZero-LP’s consumption of

substantially less than 5 mW at 230 VAC rounds to zero based on the

IEC definition. This low power level is also immeasurable on most

power meters. The accurately specified FEEDBACK (FB) pin voltage

reference enables universal input primary-side regulated power

supplies with accurate constant voltage from 5% to full load. The

start-up and operating power are derived directly from the DRAIN pin

which eliminates start-up circuitry. The internal oscillator frequency is

jittered to significantly reduce both quasi-peak and average EMI,

minimizing filter cost.