TAS6584Q1EVM: channel current spikes

Jose Paza1

Part Number: TAS6584Q1EVM

Tool/software:

Hi,

I occasionally experience channel 1 or 2 overcurrent fault "ChOCDCFaultMemReg [0x8E]" with 1-2msec current spike below.

Could you please advise if we can adjust the sensitivity of this fault detection circuit using an i2c? the step change in current below is when we change the volume from 77decimal to 60decimal using a 6mF capacitive load.

At this moment I have a last resort solution of placing a ICL and relay to quench that inrush but the solution is expensive and will require a board change.

JOse

23 hours ago

0 Gregg Scott 10 hours ago

TI__Mastermind 38905 points

Jose,

A 6000uF load is very unusual. I can only suggest that you slow down the Digital Volume Ramp as much as possible. In register 0x44. The ramp up and ramp down can be controlled. The default is to change 0.5dB for every 1FS. Change it to 0.5dB for every 4FS. This will slow it down by 4x.

If this is not slow enough you can use your software to slow the change from 77decimal to 60decimal by changing the volume setting by 1 value and add delay.

Regards,
Gregg Scott

0 Jose Paza1 7 hours ago in reply to Gregg Scott

Prodigy 230 points

thanks.. I will try the solution suggested and see how it goes.

Our application is quite different. We use the tas IC to inject controlled current source to this product that we just release.. see below link

The CC source will be used by service technicians to control power up and configure the product below before installation. as the product might be in the lowest protection settings in terms of frequency and current. the tas IC drives a 6mF load and the product (a short). the device then harvest energy from this CC source to operate.

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TAS6584Q1EVM: channel current spikes