Hi team,
Can you please help check the external circuit of DRV8340 customer designed?
1.Is there must be a resistor in series of between VDRAIN?
2.The DRV8350's power supply is the same with MOSfet, it used a common inductor between the MCU's ground.
The question is :how should I connect AGND and PGND. Is this correct according to the schematic? ANDG connected with MCU's GND. PGND connetced with MOS driver supply's GND_DRV?
Hi Zoe,
The schematic looks good but there are a few comments I had:
1. The capacitor between CPL and CPH is the wrong value, it should be 0.047uF
2. Where is the 4.7uF cap from VM to PGND?
3. What is the reason for resistors from the MCU to the inputs of the driver?
4.
1.Is there must be a resistor in series of between VDRAIN?
Did you mean the customer wants to add a resistor between VDRAIN? There is no need
5.
:how should I connect AGND and PGND. Is this correct according to the schematic? ANDG connected with MCU's GND. PGND connetced with MOS driver supply's GND_DRV?
Yes this would be correct. It is best to separate these grounds.
6. Yes this can be a alternative to TLE9180D.
7.
2.The DRV8350's power supply is the same with MOSfet, it used a common inductor between the MCU's ground.
I'm not sure what exactly to mean by this but PGND is known to be very noisy so it is best to keep separate from the ground of signals that are sensitive.
Regards,
Yara
Hi Yara,
Detailed power stage MOSFETs external circuit sent as attached. Thanks!
Hi Yara,
Customer wants to make sure they have connected the GND in a correct way.
They connect AGND with MCU power supply. VM connect with VBAT_FLT. PGND connect with GND_DRV. VBAT_DRV_CLU is connected with external mosfet. Great thanks to you help!
