Applications

• Appliances

• Metering

• Smart LED drivers and industrial controls

• IOT, home and building automation

Description

The LinkSwitch™-TN2 family of ICs for non-isolated off-line power

supplies provides dramatically improved performance compared to

traditional linear or cap-dropper solutions. Designs using the highly

integrated LinkSwitch-TN2 ICs are more flexible and feature increased

efficiency, comprehensive system level protection and higher reliability.

The device family supports buck, buck-boost and flyback converter

topologies. Each device incorporates a 725 V / 900 V power MOSFET,

oscillator, On/Off control for highest efficiency at light load, a highvoltage

switched current source for self-biasing, frequency jittering,

fast (cycle-by-cycle) current limit, hysteretic thermal shutdown, and

output and input overvoltage protection circuitry onto a monolithic IC.

LinkSwitch-TN2 ICs consume very little current in standby resulting in

power supply designs that meet all no-load and standby specifications

worldwide. MOSFET current limit modes can be selected through the

BYPASS pin capacitor value. The high current limit level provides

maximum continuous output current while the low level permits using

very low cost and small surface mount inductors. A full suite of

protection features enables safe and reliable power supplies protecting

the device and the system against input and output overvoltage faults,

device over-temperature faults, lost regulation, and power supply output

overload or short-circuit faults.