Linkswitch TNZ In 3 wire mode
I'm looking into implementing the Linkswitch TNZ in a transistor phase dimmer design and I've been looking at DER-865. I am looking for more information and guidance about how the device will operate with a neutral connection.
For context I am considering when the dimmer is fully on and current is only drawn at the input of the supply when live is negative, since the return for the supply will always be at live potential, i.e. a half wave rectified input and your design spreadsheets indicate a 2200uH inductor will be fine for a 70ma output, lovely stuff.
1. We will very likely be using either a +10dBm/+20dBm 433/868MHz transceiver and I'm concerned about the proper operation of the device with relatively high peak current draw when transmitting. I plan to increase the input capacitance to mitigate voltage drop at the input of the supply but if we are pulling 100-120ma for around 40-50ms when transmitting do you foresee any problems?
2. If we were to operate the device with a neutral only, would D6 still be required for the zero cross? I assume not but I want make sure!
If you have any other gems of wisdom which aren't present on the datasheet or reference design it would be greatly appreciated.