Other Parts Discussed in Thread: DRV8912-Q1EVM, LM74700-Q1
Hello,
I am using LM74610-Q1 is DRV8912-Q1EVM. We found the charge pump capacitor voltage glitch about every 1.1s.
Do you see any issue with the following circuit?
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Hello,
I am using LM74610-Q1 is DRV8912-Q1EVM. We found the charge pump capacitor voltage glitch about every 1.1s.
Do you see any issue with the following circuit?
Hi Wang Li,
The LM74610-Q1 is a zero-Iq device.
LM74610-Q1's charge pump is charged through the body diode drop when the FET is turned OFF.
Once the charge pump is fully charged, FET is turned ON again. Next the charge pump will loose charge and slowly decay. Once it reaches
a threshold, MOSFET is turned off. The Voltage drop of body diode is used to charge the charge pump. This process repeats as shown in Figure 9 of datasheet.
Regards,
Kari.