LNK354 Description
LinkSwitch-HF integrates a 700 V power MOSFET, oscillator, simple ON/OFF control scheme, a high voltage switched current source, frequency jittering, cycle-by-cycle current limit, and thermal shutdown circuitry onto a monolithic IC. The start-up and operating power are derived directly from the DRAIN pin, eliminating the need for a bias winding and associated circuitry. The 200 kHz maximum switching frequency allows...
LNK354 Key Features
- Fully integrated auto-restart for short-circuit and open loop protection
- Self-biased supply
- saves transformer auxiliary winding and associated bias supply ponents
- Tight tolerances and negligible temperature variation on key parameters eases design and lowers cost
- High maximum switching frequency allows very low flux density transformer designs, practically eliminating audible noise
- Frequency jittering greatly reduces EMI
- Packages with large creepage to high voltage pin
- Lowest ponent count switcher solution Much Better Performance over Linear/RCC
- Lower system cost than RCC, discrete PWM and other integrated solutions
- Universal input range allows worldwide operation
LNK354 Applications
- Chargers for cell/cordless phones, PDAs, digital cameras, MP3/portable audio devices, shavers etc