FTM Board Club
Power Integrations
RDK-866
Reference Design Kit for LinkSwitch-TNZ
This reference design kit for the LinkSwitch-TNZ offline switcher IC provides an output voltage of 5.0 V, and is rated for a power output of 2.5 W.
 
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The LinkSwitch-TNZ family of ICs combine power conversion with lossless generation of AC zero crossing signal used typically for system clock and timing functions.

The device incorporates a 725 V power MOSFET, oscillator, a high-voltage 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.

Designs using the highly integrated LinkSwitch-TNZ ICs are more flexible than discrete implementations reducing component count by 40% or higher.

The key design goal is low cost, low audible noise and compact form factor intended for wireless (WiFi, NBIoT etc.) and relay power.

Features
  • 5 V / 500 mA output for wireless (WiFi, NBIoT etc.) and relay power
  • Low cost and component count buck converter using off-the-shelf inductor
  • Compact solution 1.25" x 1.25" x 0.6"
  • AC zero crossing signal output

Optimized for

  • No-load input power
  • Excellent output voltage line regulation (<2% 5 VTYP)
  • Reduced dissipation during output short-circuit fault
  • Low output voltage ripple
  • >6 dB conducted EMI margin