Part Number: DRV8662 The part referenced was ordered. paid and received and does not function and I have to assume at this point, defective.
We need to have this part for our light manufacturing business and a response is imperative...
Thank You!
Mary…
Thanks Justin,
Just want to share this scope capture, input is 1.8Vp2p, Gain setting to 00,Vboost to ~18V, yellow is OUTA (5V/div), green is OUTB (5V/div) , blue is VBOOST (5V/div) , CH4 is IOUTA (50mA/div) , the light pink is OUTA-OUTB (10V/div) . DRV8662…
Hi Luis,
I already monitored the ouput with an osilloscope and ascertained a proper output signal.
I evaluated that the detection circuit does not affect the DRV8662 operation.
The problem is that the DRV8662 affect the detection circuit.
To make it clear…
Hi, Boyuan,
Could you share a oscilloscope capture of PVDD and BST pins when you enable the device? PVDD should be 0V when the device is disabled as you correctly mentioned, but I would like to ensure that the level you are getting is correct when you…
Hello Yamaguchi-san,
1. The 50% duty cycle allows the source and input capacitors to settle before the DRV8662 is fully enabled. In other words, it gives time for the capacitor to charge with the DC offset between source and device input.
2. The delay…
Part Number: DRV8662 Hi team,
My customer is considering to use the DRV8662. Could you please help with the question below?
If the OUTPUT+ and OUTPUT- are shorted, how will be the output current? Does the current limit function work?
Regards,
Yamagu…
Part Number: DRV8662 Hi team,
My customer is considering to use the DRV8662. Could you please help with the question below?
Is the relationship between IN+ and OUT+/OUT- correct in the following? When IN+ = 1.8 [V], OUT+ =Vpp [V], OUT- = 0 [V], When IN…
Hello,
If the current pulse is a problem, then you can try to reduce it by increasing the boost capacitance (or just adding a small ESR/ESL capacitor in parallel).
Alternatively, you could add a ferrite bead in series with the output and possibly a shunt…
Hi, Shozo,
It could be a possible cause. However, have you reviewed all the external components connected to the DRV8662 and ensure that they are not damaged?
Especially, the switching inductor, was it also damaged? Do you see the same impedance level…
Hello Luis, The specification could be GBW according to my frequency response plots on the DRV8662 EVM with 110nF piezo actuator load. Would you please provide recommendations of them? VBAT = 5V. GAIN=0GAIN1=High VIN to VOUT
Full Scale Vout = 37.21Vrms …
