ADum4223/4224 different ?

Dear

ADum4223/4224 , I checked datasheet and I not sure what kind of those have any different ?

So far , I found a part form Silicon lab Si8223BD-D-ISR

Does ADuM4223/4224 that can replace Si8223DB ? the circuit please check belows.

I would like to use the isolator driver for HB operation. thanks for feedback

https://www.silabs.com/Support%20Documents/TechnicalDocs/Si823x.pdf

Parents
  • 0
    •  Analog Employees 
    on Jan 5, 2015 11:31 PM

    Hello,

    The ADuM4223 and ADuM4224 would be excellent replacements for the Si8233BD-D-IS. There are a few things to consider though:

    1. The difference between the ADuM4223 and ADuM4224 is that the ADuM4223 contains an internal thermal shutdown circuit to protect the ADuM4223. If the internal junction temperature goes above approximately 145ºC, the ADuM4223 will output a low signal on VOA or VOB (depending which channel overheated). This action is sometimes not desired in certain topologies, such as resonant converters, where abruptly shutting off one channel can result in over voltages.

    The ADuM4224 does not contain an internal thermal shutdown circuit, so it is up to the user to ensure that the chip is not overheated. Although chip operation is possible above 150ºC, the operation timing is not guaranteed at these high temperatures, and continued use at extreme temperatures can lead to damage of the gate driver chip.

    2. The ADuM4223 and ADUM4224 do not contain primary side overlap protection like the Si8233. This is not usually an issue, unless your VIA and VIB inputs are high at the same time. The ADuM4223 and ADuM4224 have fully independent channels, so it is possible to have both VOA and VOB go high at the same time. In most situations, users are able to control the chance of overlap by supplying mutually exclusive VIA and VIB input signals, with the desired dead-times. The ADuM4223 and ADuM4224 are more similar in operation to the Si8232/5/6/7/8 for logic.

    I hope this helps,

    Ryan

Reply
  • 0
    •  Analog Employees 
    on Jan 5, 2015 11:31 PM

    Hello,

    The ADuM4223 and ADuM4224 would be excellent replacements for the Si8233BD-D-IS. There are a few things to consider though:

    1. The difference between the ADuM4223 and ADuM4224 is that the ADuM4223 contains an internal thermal shutdown circuit to protect the ADuM4223. If the internal junction temperature goes above approximately 145ºC, the ADuM4223 will output a low signal on VOA or VOB (depending which channel overheated). This action is sometimes not desired in certain topologies, such as resonant converters, where abruptly shutting off one channel can result in over voltages.

    The ADuM4224 does not contain an internal thermal shutdown circuit, so it is up to the user to ensure that the chip is not overheated. Although chip operation is possible above 150ºC, the operation timing is not guaranteed at these high temperatures, and continued use at extreme temperatures can lead to damage of the gate driver chip.

    2. The ADuM4223 and ADUM4224 do not contain primary side overlap protection like the Si8233. This is not usually an issue, unless your VIA and VIB inputs are high at the same time. The ADuM4223 and ADuM4224 have fully independent channels, so it is possible to have both VOA and VOB go high at the same time. In most situations, users are able to control the chance of overlap by supplying mutually exclusive VIA and VIB input signals, with the desired dead-times. The ADuM4223 and ADuM4224 are more similar in operation to the Si8232/5/6/7/8 for logic.

    I hope this helps,

    Ryan

Children
No Data