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Aug 10, 2012
01:15 AM
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Aug 10, 2012
01:15 AM
Hello,
I would like to use NovalithIC™ BTN7970 High Current PN Half Bridge, at the switching frequency ~1 kHz. The trouble is that I need to modulate pin No. 3 (Inhibit) as well to disable reverse current through the lower switches (therefore it would be switched at ~2 kHz). Is this possible, can BTN7970 respond properly to such relatively fast switching of this pin, since it goes to "sleep mode"?
Thank you!
I would like to use NovalithIC™ BTN7970 High Current PN Half Bridge, at the switching frequency ~1 kHz. The trouble is that I need to modulate pin No. 3 (Inhibit) as well to disable reverse current through the lower switches (therefore it would be switched at ~2 kHz). Is this possible, can BTN7970 respond properly to such relatively fast switching of this pin, since it goes to "sleep mode"?
Thank you!
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- IFX
3 Replies
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Aug 16, 2012
06:53 PM
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Aug 16, 2012
06:53 PM
Everybody on a vacation?
Aug 21, 2012
10:37 AM
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Aug 21, 2012
10:37 AM
hey sorry for the late reply
from the datasheet the btn79xx series its capable of working at 25khz also infineon has an application kit for a bldc motor in which if i remember correctly in software they switch the pwm from the INH pin to IN pin probably for the same reason as you want to do that im not sure though about the pwm frequency
why don't you do some tests ?
putyn
from the datasheet the btn79xx series its capable of working at 25khz also infineon has an application kit for a bldc motor in which if i remember correctly in software they switch the pwm from the INH pin to IN pin probably for the same reason as you want to do that im not sure though about the pwm frequency
why don't you do some tests ?
putyn
Not applicable
Mar 29, 2013
03:44 PM
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Mar 29, 2013
03:44 PM
I've done exactly this (PWM the INH pin) on the BTN7960 and several other NovalithicIC half bridges at >20kHz. I don't think there will be any problems doing the same thing with the BTN7970.