IRS2092 small schematic question

[-_nando-_]

Hi there, how are you?

My question is about the 10K bias resistor of the protection diode of the CSH pin.

On the application note AN-1138, Figure 13, the resistor R1 is connected to the HO pin.
http://www.irf.com/technical-info/appnotes/an-1138.pdf

However, on IRAUDAMP7 schematic, figure 25, the same resistor (R22) is connected to pin VB instead.
http://www.irf.com/technical-info/refdesigns/iraudamp7s.pdf

I found many schematics from IRF that differ 😕

Which one is correct?

Thank you.

Fernando

 

[ledsscp7]

On the application note AN-1138, Figure 13, the resistor R1 is connected to the HO pin.
http://www.irf.com/technical-info/appnotes/an-1138.pdf

Which one is correct?

Thank you.

Fernando

The first accurate

 

[-_nando-_]

I tried the "contact-us" and it worked!

Hope that is of some use to other people. Thanks anyway!

Hello Fernando,

The CSH works when HO is ON. And when HO is ON, the voltage on HO is very close to VB, so both connections are correct.


Best regards,

Infineon Technologies
Daisy Teng, Customer Service Professional