Hey Yishan,
The waveform captures that would help understand this issue would be on a smaller time scale to show the zoomed in version of these measurements. It would be good to see the operating state at high PWM before failure as well as if the failure…
Part Number: LM5101A From my customer who is qualifying this device for their new project:
Engineering team found that the voltage applied to pin 6 is being exceeded on the negative side slightly:
“During routine testing, an over-voltage on this driver…
Hi Chris,
LM5100A has CMOS inputs that require a higher voltage to drive:
The 3.3V square wave is not passing the 5.4V threshold, so the outputs stay low. The LM5101A has TTL inputs that can be driven with a 3.3V signal. Please let me know if there are…
Hi Chuck..
Here is the website I used to estimate the bootstrap cap.
" www.silabs.com/.../bootstrap-calculator.aspx"
It allows you to calculate for a max of 4 MOSFETs. So I started with 1, then 2, then 3, then 4 to see the pattern and I extrapolated…
Other Parts Discussed in Thread: LM5105 , LM5102 In comparing the datasheets for the LM5100/LM5101x with the datasheets for the LM5102 and LM5105, there is roughly a factor of 3.5x increase in boot-strap diode dissipation for the 02 and 05 parts for similar…
Other Parts Discussed in Thread: LM5101A Hi,
We are using LM5101A in phase shift full bridge DC-DC converter for Mosfet Gate driving. We are facing a problem with High Side Output. There is crossover between the Top and Bottom Side Mosfet's Drain to Source…
Other Parts Discussed in Thread: LM5101A We are using an LM5101A gate driver in a buck converter regulator for a battery charger. Several times we have experienced the driver chip burning up unexpectedly. Usually we can hear an audible noise and then it…
Other Parts Discussed in Thread: LM5101A , UCC27512 , LM5113 4251.sch1.docx
Hello Sir/Madam,
I am intending to use LM5101A as the gate driver for load side PMOS switch drive of a boost converter.
Boost Max output : 12V-16.5V
HI input gets the PWM signal…
Other Parts Discussed in Thread: LM5101A Hi,
I've been working with the LM5101A for a week now and have been having some trouble getting a signal out of the HO output of the IC.
Right now these drivers will be sending a signal to a half H-bridge that…
Hello Thomas,
For compatibility with 3.3V CMOS, I assume for the driver inputs, the LM5100A will not be compatible. The LM5100A has high turn on thresholds of 5.4V typical. Within this driver family the LM5101A is compatible since the threshold is 2.3V…