LNK304PN Off-line Switcher IC

Switch ICs designed as a power management ICs placed between a voltage source and a load to control power supply to the load. Using mechanical relays, MOSFETs, and other discrete semiconductor devices, a comparable circuit may be built. Loadswitch ICs, on the other hand, assist to minimise circuit footprint and power consumption. These integrated circuits (ICs) are capable of storing energy in an inductor, transformer, or capacitor. And it allows the storage device to transport energy in discrete packets from the input to the output through a low-resistance switch.

The LinkSwitch LNK304PN is designed to replace all linear and capacitor-fed (cap dropper) non-isolated power supply with output currents less than 360 mA. This accomplished at a similar or lower system cost while providing significantly better performance and energy economy. A 700 V power MOSFET, oscillator, high voltage switching current source, current limit (user selected), and thermal shutdown circuitry are all included in the LNK304PN. The ON/OFF control technique is used by the IC family. As a result, it provides a design-friendly solution with a reduced system cost and increased power capabilities. It regulates the output voltage using a simple ON/OFF control, unlike traditional PWM (pulse width modulator) controllers.

The start-up and operating power derived directly from the voltage on the DRAIN pin. In a buck or flyback converter, this eliminates the requirement for a bias supply and accompanying circuitry. During fault circumstances such as short-circuit or open loop, the LNK304-fully 306’s integrated auto-restart circuit reliably limits output power. As a result, the number of components and the cost of system-level load protection are reduced. The usage of a non safety graded optocoupler as a level shifter is enabled by a local supply provided by the IC. If necessary, this will improve line and load regulation performance in buck and buck-boost converters.

APPLICATIONS:

• Appliances and timers.
• LED drivers and industrial controls