Announcements

Register now for the most anticipated Asia Pacific Power Seminar 2022

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

Gate Driver ICs Forum Discussions

User16101
Level 1
5 questions asked First reply posted First question asked
Level 1
Dear Gate Driver team.

We want to use only High side FET on AUIR2181.
So, We design Lin and Lo Pin to GND as a attach file.


Can we design Lin and LO pin to GND?
Because, The PULSE Generator with LV Detect interface High and Low side as Internal BlockDiagram.

Thanks
Best Regards
Gerald
0 Likes
1 Solution
Emanuel
Employee
10 solutions authored 5 solutions authored First solution authored
Employee
Glad to help you and good luck with your design,

Best regards,
Emanuel

View solution in original post

0 Likes
3 Replies
Emanuel
Employee
10 solutions authored 5 solutions authored First solution authored
Employee
Hi Geraldchoi,

Welcome to the forum.

The function block you have marked with red (UV) is the under voltage detection circuit of the IC.
This function block is used to detect a too low supply voltage (Vcc). If the supply voltage is too low, the gate driver might behave unexpected, and will also not provide sufficient voltage to properly drive the load transistor. For more info on the function, please read this application note especially at page 10.

Regarding the connection of Lin and LO to ground.
It is sufficient to connect Lin to GND and leave LO unconnected as it will anyway be pulled internally to ground.

Best regards,
Emanuel
0 Likes
User16101
Level 1
5 questions asked First reply posted First question asked
Level 1
Hi Emanuel

Thank you for your kindly reply
I will use LIN to GND and LO to NC.

Thanks

Best Regards
Gerald






Emanuel wrote:
Hi Geraldchoi,

Welcome to the forum.

The function block you have marked with red (UV) is the under voltage detection circuit of the IC.
This function block is used to detect a too low supply voltage (Vcc). If the supply voltage is too low, the gate driver might behave unexpected, and will also not provide sufficient voltage to properly drive the load transistor. For more info on the function, please read this application note especially at page 10.

Regarding the connection of Lin and LO to ground.
It is sufficient to connect Lin to GND and leave LO unconnected as it will anyway be pulled internally to ground.

Best regards,
Emanuel
0 Likes
Emanuel
Employee
10 solutions authored 5 solutions authored First solution authored
Employee
Glad to help you and good luck with your design,

Best regards,
Emanuel
0 Likes