DRV603: DRV603 Vuvp min and max value?

Hi Hugo,

We usually specify only typical values for specs like this.
There is an estimated value from simulation: Min = 1.20, Typ = 1.25, Max = 1.29. However this is a simulation estimated value, this does not imply that the device is guaranteed to work within these levels.

Best regards,
-Ivan Salazar
Audio Applications Engineer - Low Power Audio & Actuators

Hi Ivan
Very thanks your reply.

In addition, we'd like understand UVP action behavior.
Q1. What condition can cause DRV603 output normally? Supply power voltage need over +5V or under +5V?
Q2. How to know detect behavior at Hysteresis?

Thank you for your great support.

Hugo,

DRV603 can operate from 3-V to 5.5-V supply voltage. If UVP feature is used you must use equations on Page 12 from data sheet to set the required threshold. When the supply voltage goes over the specified threshold the device will star to operate. When the device is operative, if the supply voltage goes down below the specified threshold minus the specified hysteresis it will stop working.
Behavior at hysteresis is the same as normal operating behavior. When the supply voltage goes out of hysteresis the device will stop working.

Best regards,
-Ivan Salazar
Audio Applications Engineer - Low Power Audio & Actuators

Hi Ivan sir
Very thanks your reply.

We have tested as below.
We used power supply replace VCC_5V. When it over 4.9V, DRV603 has output normally. When it under 3.8V, DRV603 disable output. The testing results looks meet spec.

In datasheet page12 reference schematics, we used 3K at R11, 1K at R12, 45.3K at R13.
But we change pull up R11 from 3K to 2.2K. When it over 2.7V, DRV603 has output normally. When it under 2.4V, DRV603 disable output.
The testing results looks not meet spec. Do you know what point cause it?

Thank you for your great support.

Hugo,

This seems odd. Is this behavior present in a single device? Or is it present at several devices?
Could you measure voltage at pin 11 when the device is entering normal operation and when it is disabling?

Best regards,
-Ivan Salazar
Audio Applications Engineer - Low Power Audio & Actuators

SCHEMATIC1 _ 09_DSP 0 MCASP.pdfHi Ivan sir

I  have further question for this issue. Here is the story for this issue until now.

 

Issue Description:

 One NG board, returned from our customer, has no audio function and we confirmed that audio amplifier U4 can’t be outputted the audio signal.

 

Root cause analysis:  

At the beginning we thought  this issue is caused by the UVP setting of DRV603 since we can fix the NG board by changing R26 to 2.2K ohm. According to the formula below, it seems that the threshold of UPV is 5.0V and VCC_5V of our bard is only just 5.0V~5.04V. Perhaps our UVP setting is marginal. However, we measured the 10pcs DRV603 to check the tolerance and found the actual threshold value is around 4.9V even the calculated result by formula is 5.0V. We also measured the pin 11 on 10cps DRV603 by the current UVP setting, they are all around 1.50V ~1.51V but NG board is 1.3V. It seems that DRV603 for NG board is different to others. So, we suspect this DRV603 is out of the tolerance range. 

Could you have any comments for it?  Thank you for your great support.

 

 

Hi Hugo,

Have you tried these 10pcs and NG part with the same external circuitry? I mean R26, R27 and R28 are the same for all tested parts?
I would like to confirm if the difference in voltage at pin 11 is related to DRV603 part or it could be related to external resistors.
By "current UVP setting" you mean R26 = 2.2Kohm?

Best regards,
-Ivan Salazar
Audio Applications Engineer - Low Power Audio & Actuators

Hi Sir,

 

Yes, I have confirmed that they are same external circuitry no matter 10pcs or NG part. The current UVP setting I mean R26 is still 3K ohm.