Diode selection for Voltage multiplier [Sine wave / peak to peak : 557V / Freq : 61.1kHz]

Thread Starter

Mars Park

Joined Feb 20, 2022
35
The wave form is here.

1652914937620.png

When this waveform is input to the multiplier (Just 1 stage), it seems that the output and ripple are different for each diode.

So I thought the fast recovery diode (about 75ns to 500ns) would have good characteristics.

I used these.
US1M-HF Comchip Technology | 이산 반도체 제품 | DigiKey
-Foward Voltage : 1.65@1A; Reverse Voltage : 1000V ; trr : 75ns

CD1408-F11000 Bourns Inc. | 이산 반도체 제품 | DigiKey
-Fowar Voltage : 1.3V@1A; Reverse Voltage : 1000V ; trr : 300ns

FR1M-LTP Micro Commercial Co | 이산 반도체 제품 | DigiKey
-Foward Voltage : 1.3V@1A; Reverse Voltage : 1000V ; trr : 500ns

But all of these were not valid. The multiplier output was less than 10 volts.

The circuit is here.
1652916780191.png

Please give me some advice on the die selection.
 

Thread Starter

Mars Park

Joined Feb 20, 2022
35

Thread Starter

Mars Park

Joined Feb 20, 2022
35
????
The transformer has a 67:1 turn ratio. What is the AC voltage on the Collector? The output of the transformer should be 67x more. Then there is the voltage doubler.
1652921866432.png
I didn't recorded the output of collector. What I can tell you right now is that I did not used pin1, pin5 as input. I used pin1, pin3. Isn't this why the power of the transformer is so high?
 
Top