Power Integrations LinkZero-LP Zero No-Load Consumption Integrated Off-Line Switcher

Power Integrations LinkZero-LP Zero No-Load Consumption Integrated Off-Line Switcher

Power Integrations LinkZero-LP Zero No-Load Consumption Integrated Off-Line Switcher is an upgrade to the LinkSwitch-LP, the industry's lowest component count charger/adapter and standby power switcher IC. It incorporates new technology which enables the device to automatically enter into and wake up from no-load mode while taking less than 5mW from the AC power. Power Integrations LinkZero-LP Zero No-Load Consumption Integrated Off-Line Switcher comprises a 700V power MOSFET switch with a power supply controller on the same die. Unlike conventional PWM (pulse width modulation) controllers, it uses a simple ON/OFF control to regulate the output voltage. The controller consists of the following circuits: an oscillator, feedback (sense) 5.85V regulator, BYPASS pin under/overvoltage protection, over-temperature protection, frequency jittering, current limit, leading edge blanking BYPASS pin clamp in power down, and bypass mode. The controller includes a proprietary power down mode that automatically reduces standby consumption to levels that are immeasurable on most power meters.

Benefits

Automatically enters zero input power mode when load is disconnected
Detects load reconnection and automatically restarts regulation
Simple upgrade to existing LinkSwitch-LP designs
Very tight IC parameter tolerances improve system manufacturing yield
Suitable for low-cost clampless designs
Frequency jittering greatly reduces EMI filter cost
Extended package creepage improves system field reliability
Accurate hysteretic thermal shutdown protection - automatic recovery reduces field returns
Universal input range allows worldwide operation
Auto-restart reduces delivered power by >85% during shortcircuit and open loop fault conditions
Simple ON/OFF control, no loop compensation needed
High bandwidth provides excellent transient load response with no overshoot
No-load consumption as low as 4 mW at 230 VAC input
Easily meets all global energy efficiency regulations with no added components
ON/OFF control provides constant efficiency to very light loads