We have more contact with single wire switches. Single wire switches are easy to replace traditional physical switches (compatible with most current building wiring structures), support Internet of things control, and have a very broad market prospect. However, in this mode, all the current of the active switch will flow through the load. If the leakage current is large during standby, it will lead to stroboscopic or ghost phenomenon of common LED lamps, and the night experience is very bad.
Linkswitch TNZ auxiliary power products launched by PI support flyback, step-down and step-up applications. Support 12W output, built-in soft start, standby current < 100 μ A. The very low no-load power is less than 20MW, and the zero crossing detection without loss is integrated, which saves 40% of the devices compared with the traditional scheme. It supports single wire switch, dimming, sensor and three wire switch applications, and can also be used in home appliance power supply applications. AC zero crossing detection can be used to control the thyristor and relay opening signal, significantly reduce the surge current of the switch and prolong the service life.
The reference design der-865 introduced by PI adopts lnk3302d and supports two-wire, single wire and zero wire wiring. Zero crossing signal is used for dimming control. It supports leading edge or trailing edge dimming, is compatible with 3-250w load, has built-in nrf52832 ble module, and can be controlled by smart phone. Rdk-866 is a non isolated 5v0.5a power supply. It adopts lnk3307d, supports 90-300vac input, provides zero crossing signal output, has no-load power consumption of less than 50MW, and can realize audio noise performance of < 10dB.
PI provides power IC with withstand voltage up to 900v, supports AC input up to 450V, and provides sufficient withstand voltage margin. Support buck, buck boost and flyback architectures. Provide greater creepage distance and improve reliability and safety.
For the USB PD fast charging application of wall socket, PI can provide mature technical solutions for customers to choose. The internal space of the wall socket box is limited, and the volume of the charger should be very small. At the same time, there is no efficient heat dissipation path inside the socket box, so high efficiency and high thermal stability are necessary. The innoswitch3 series highly integrated chip of PI using powigan technology is very suitable for internal use in wall sockets, and its unique current sharing architecture is also suitable for multi port solutions.
Powigan gallium nitride technology can reduce the conduction loss and switching loss of primary switch. PI introduced der-917 reference design using powigan technology, which supports 5-20v output and 60W output power. Inn3270c powigan switch chip is used to support 5v6.5a, 9v5a, 15v3a and 20v3a output. The full load output efficiency is higher than 94%. Under 50 ℃ ambient temperature, the device temperature is lower than 100 ℃, the standby power is less than 40mW, and the size is 66 * 29 * 18mm. PI also introduced der-916 and rdk-848 reference designs, It can be used for wall socket, power plug-in and lightning protector applications.
