Oct 26, 2020
02:11 AM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Oct 26, 2020
02:11 AM
I used NMOS IPD60R180P7S for reverse polarity protection on the negative live of the power supply (circuit is attached). Initially a simple diode is used on the positive line but due to USB loop current issue, the protection must be relocated to the negative line using an NMOS.
When i did EMC surge test, for negative surge the Vgd drop to -50V for around 50us. The device is working fine but i am wondering if this -50V is a concern since this is greater than |Vgs|?
Can the device be damaged by |50V| Vgd for 50us? I checked in the data sheet there is no specification for Vgd. What is the maximum Vgd DC or transient value that will not damage the device?
Thank You.
When i did EMC surge test, for negative surge the Vgd drop to -50V for around 50us. The device is working fine but i am wondering if this -50V is a concern since this is greater than |Vgs|?
Can the device be damaged by |50V| Vgd for 50us? I checked in the data sheet there is no specification for Vgd. What is the maximum Vgd DC or transient value that will not damage the device?
Thank You.
Solved! Go to Solution.
Labels
- Tags:
- IFX
1 Solution
Oct 28, 2020
02:45 AM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Oct 28, 2020
02:45 AM
This is for VGS: Please refer to the maximum ratings in the datasheet. You will find the maximum gate voltage (static) as +/-20V and maximum gate voltage (dynamic, AC (f>1 Hz)) as +/-30V.
VGDmax is very much higher than VGSmax, so in real application you firstly would exceed VGS/VDS values before VGD.
VGDmax is very much higher than VGSmax, so in real application you firstly would exceed VGS/VDS values before VGD.
1 Reply
Oct 28, 2020
02:45 AM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Oct 28, 2020
02:45 AM
This is for VGS: Please refer to the maximum ratings in the datasheet. You will find the maximum gate voltage (static) as +/-20V and maximum gate voltage (dynamic, AC (f>1 Hz)) as +/-30V.
VGDmax is very much higher than VGSmax, so in real application you firstly would exceed VGS/VDS values before VGD.
VGDmax is very much higher than VGSmax, so in real application you firstly would exceed VGS/VDS values before VGD.