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.