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Calculation of Current consumption for PFC Driver UCC27511

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Bjtpower

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Hello Friends,

I have chosen the UCC 27511 PFC Driver for the Driving IGBT.

Switching Frequency is 20khz

Now if i want exact power supply required for the same i need a current consumption of the IC While IGBT Driving.

So , i am not able to understand from the datasheet, how much current is required for the IC..?? and how to calculate it.

IGBT Using :STGW35HF60WD

https://www.ti.com/lit/ds/symlink/ucc27511.pdf


Regards
Marx
 

Total supply current is IC quiescent current plus IGBT gate charge multiply switching frequency.
 
From the data sheet fig 6 & 7 showing that maximum supply current is about 4mA, It should be the supply current maximum at VDD = 4.5V (VDD = 4.5V to 18V) . Supply current will be much lesser If supply current 18 V.
 
From the data sheet fig 6 & 7 showing that maximum supply current is about 4mA.
Click to expand...
No. Fig. 7 is showing the static quiescent current, Fig. 6 is a specific load case (Cload 500 pF, fs 500 kHz). Current consumption for the questioned load case should be slightly lower. Other load conditions can involve much higher current consumption.
 
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