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TAS5719: BKND_ERR REGISTER

Mochi
Genius 3915 points
Part Number: TAS5719

Hello, our customer is facing following issue at new product design.

(1) As the datasheet said,

BKND_ERR REGISTER (0x1C)
When a back-end error signal is received from the internal power stage, the power stage is reset, stopping all
PWM activity. Subsequently, the modulator waits approximately for the time listed in Table 18 before attempting
to re-start the power stage.

In this function what type of error is detected at the internal power stage? Is that single function of 4.5A over current detection or another back-end error situation would be detected?

They have seen this error at low temperature environment only. Can we get TAS5719 OCP threshold temperature characteristics? 

(2) VOLUME CONFIGURATION REGISTER (0x0E)   

D7 D6 D5 D4:1 0 0 1  – – – Reserved

However they had been using :1111 on previously  produced equipment. From now nobody know the reason why they had changed TI Reserved setting.

What is the function of 0X0E D6 and D5 register setting? Is that test mode or something?

Regards,

Mochizuki

  • 0
    TI__Expert 6295 points

    hello,

        Bank_ERR register talking about restart power stage which could relate with potential could happen fault like "Overcurrent, overtemperature, overvoltage, or undervoltage error". ERROR STATUS REGISTER (0x02) can help read back related fault.

       for reserved bit, normally we dont support customer to touch it as it is not guarantee. 

    Regards

    Linda

  • 0 in reply to Xiaolin Qin
    Genius 3915 points

    Hi Linda-san,

    Thank you for prompt reply. 

    Our customer still has curiosity about TAS5719 datasheet description because page 33, Table 3 "INITIALIZATION VALUE" and page 46 "Reserved value" are not same.

     e.g. 

    VOLUME CONFIGURATION REGISTER (0x0E) :  Table 3 INITIALIZATION VALUE is 0xF0, Reserved is 0x90.

    DRC CONTROL REGISTER (0x46):Table 3 INITIALIZATION VALUE is 0x0002 0000, Reserved is 0x0000 0000.

    EQ control (0x50): Table 3 INITIALIZATION VALUE is 0x0F70 8000, Reserved is 0x0000 0000.

    Which value should they use, Table 3 or Default number?

    Actually that is reason why they had been using not TI reserved register value.

    Regards,

    Mochizuki

  • 0 in reply to Mochi
    TI__Expert 6720 points

    Hi Mochizuki,

    Datasheet specs reserved bits means no need to configure them. The reason for above difference is reserved registers might be used during audio processing, and automatically configure initialization value.

    Regards,

    Matthew

  • 0 in reply to Matthew Miao
    Genius 3915 points

    Hello Matt-san,

    Thank you for your explanation.

    That is meaning, after reset the device the Register is default value then run instruction code the Register will change to initialization value.

    Anyway our customer no need to write the initial value to those Register. We hope to see this type of additional explanation on the datasheet to avoid confusion.

    Regards,

    Mochizuki