i had one query regarding schematics of tida01292.
1. Here the U1 part referenced (LM5101) driving first leg (GHIA and GLIA) and U4 part referenced (LM5101) driving second leg (GHIB and GLIB) have difference with respect to V+ after R29(in U4) and no…
Hi Derek
Thanks for your response.
1. Not sure why the scope is showing 18V, but the voltage should be 12V. I need to check on this, perhaps I have the wrong Voltage regulator.
2. On the board only the UCC27714 is used the LM5101 is not populated,…
Hello Erik,
You confirmed the questions I had. On the 1st question I just wanted to know if the scope plots were the driver only and not driving the power train, which you confirmed.
On the second question, I am referring to the HO pulse width that…
Dear Johny, LM5101 or LM5102 is recommend to co-work with LM5041 for buck gate driver which can program delay time. You can refer to LM5041EVAL reference design. Thanks
Hello Tanvi,
Thank you for the interest in the LM5100, LM5101 family and SM74104. The LM5100, LM5101, LM5101A drivers have two independent inputs for the low side and high side drivers, the LO and HO outputs are controlled by the LI and HI inputs which…
Hi Marcel,
Thanks for asking about LM5101 and welcome to e2e. Im an apps engineer with this device and will help you out.
Since the FETs are blown, the driver might be bad. Does this issue go away when replacing the part? If so, then the device…
Hi Peter-san
Thank you for your reply.
I understand that. However, I am wondering how the output voltage behaves.
Which one is correct if the VDD falls the UVLO threshold while HO is high (means HS is High)?
If it is (a), the low side FET does…
Other Parts Discussed in Thread: LM5101 , UCC27210 , UCC27511 Hi
I am thinking about how to use the single low side driver for high side driver.
On the following document, some method is shown.
http://www.ti.com/lit/an/slua669/slua669.pdf
However…
Hi Brian,
You can use one of our half bridge drivers with a bootstrap supply. When the low side fet is on the capacitor which supplies the high side fet is charged to vcc and then its stored charge can be used to turn on the high n ch mosfet.
Take…
Other Parts Discussed in Thread: LM5101 , LM5109A Hi Team,
Customer would like to manually keep high side FET on in order to achieve 100% duty cycle during certain scenarios. Customer is already able to do this with LM5101; we just want to make sure…
