Dear Team
could you pls help with max IDD required for the IC for the below condition?
Fsw = 110kHz
Qg = 36nC
As per our calculations:
IDD = IOUT+Isupply
IDD = 4mA + Isupply
Isupply i can see in the datasheet it varies with capacitive load (refer figure 7-15 in UCC28C56HQ1 datasheet) which is 1nF. I am not sure what is the 1nF load , to what this 1nF cap is refering ? is it to the Flyback Switch Cin?
What is the startup current mean? is it refer to IC startup time how much VDD pin current consuption ? we can see that RVDDD should allow 1.3mA of supply current. not sure why the 75uA startup current.
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In webench the 18V of Zeener has connected from VDD to GND, and Vaux set for 14V (for UCC28C53Q1 device) how does the the IC takes the Aux power in the dynamic condition if zener Clamped VIN to 18V
