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TAS5754M Powerdown Current

masaki matsuoka1
Prodigy 100 points
Other Parts Discussed in Thread: TAS5754M

Hi Ti Engineers.

I am evaluating the TAS5754M(EVM).

I have a question about IPVDD at Power down.

IPVDD described as 8~9mA on DATA sheet(SLAS987)

However it was 0.1~0.2mA when actually I measure.

Why such a difference occurs?


<Conditions>
Connection: 24V---<Ammeter>---Pin No.6 and No.7
PVDD: 24V
SPK_GAIN: 20dB
fSPK_AMP: 768kHz
Powerdown Request Register: [1] Powerdown mode

Best,Regards

  • 0
    TI__Mastermind 34665 points

    Matsuoka-san,

    Your measurements are correct. This is a d/s error that haven't been updated as yet. Below are the correct values.

    Output Config VPVDD RSPK Speaker Amplifier State   IPVDD (mA) IDVDD (mA) PDISS (W)
    BTL 7.4 8 fSPK_AMP = 384kHz Idle 19.35 33.6 0.25407
    8 Mute 19.36 33.6 0.254144
    8 Standby 0.1 16.9 0.05651
    8 Powerdown 0.1 0.6 0.00272
    8 fSPK_AMP = 768kHz Idle 26 33.6 0.30328
    8 Mute 25.98 33.6 0.303132
    8 Standby 0.1 16.9 0.05651
    8 Powerdown 0.1 0.6 0.00272
    11.1 8 fSPK_AMP = 384kHz Idle 19.56 33.6 0.327996
    8 Mute 19.58 33.6 0.328218
    8 Standby 0.106 16.9 0.0569466
    8 Powerdown 0.106 0.6 0.0031566
    8 fSPK_AMP = 768kHz Idle 27.94 33.6 0.421014
    8 Mute 27.93 33.6 0.420903
    8 Standby 0.106 16.9 0.0569466
    8 Powerdown 0.106 0.6 0.0031566
    12 8 fSPK_AMP = 384kHz Idle 20.61 33.6 0.3582
    8 Mute 20.6 33.6 0.35808
    8 Standby 0.107 16.9 0.057054
    8 Powerdown 0.107 0.6 0.003264
    8 fSPK_AMP = 768kHz Idle 28.27 33.6 0.45012
    8 Mute 28.28 33.6 0.45024
    8 Standby 0.107 16.9 0.057054
    8 Powerdown 0.107 0.6 0.003264
    15 8 fSPK_AMP = 384kHz Idle 21.48 33.6 0.43308
    8 Mute 21.5 33.6 0.43338
    8 Standby 0.111 16.9 0.057435
    8 Powerdown 0.111 0.6 0.003645
    8 fSPK_AMP = 768kHz Idle 29.1 33.6 0.54738
    8 Mute 29.1 33.6 0.54738
    8 Standby 0.111 16.9 0.057435
    8 Powerdown 0.111 0.6 0.003645
    19.6 8 fSPK_AMP = 384kHz Idle 22.19 33.6 0.545804
    8 Mute 22.18 33.6 0.545608
    8 Standby 0.117 16.9 0.0580632
    8 Powerdown 0.117 0.6 0.0042732
    8 fSPK_AMP = 768kHz Idle 29.74 33.6 0.693784
    8 Mute 29.73 33.6 0.693588
    8 Standby 0.117 16.9 0.0580632
    8 Powerdown 0.117 0.6 0.0042732
    24 8 fSPK_AMP = 384kHz Idle 22.88 33.6 0.66
    8 Mute 22.89 33.6 0.66024
    8 Standby 0.125 16.9 0.05877
    8 Powerdown 0.125 0.6 0.00498
    8 fSPK_AMP = 768kHz Idle 30.3 33.6 0.83808
    8 Mute 30.31 33.6 0.83832
    8 Standby 0.125 16.9 0.05877
    8 Powerdown 0.125 0.6 0.00498
  • 0 in reply to Damian Lewis
    Prodigy 100 points

    Hi Damian.

    Thanks for quick response.

    I have another question.

    I am designing supply circuit that is our product’s standby.

    If I use below conditions, is their has any problem?

     

    PVDD: 24V

    DVDD/AVDD: 0V

    And, do you have any conditions or timings when supply pow-ON/OFF?

    When I use always PVDD ON , it will be controlled only DVDD/AVDD.

     

    Best Regards,

    M.Matsuoka

  • 0 in reply to masaki matsuoka1
    TI__Mastermind 34665 points

    Hi Matsuoka-san,

    If you are referring to CPVDD when you say AVDD then yes the condition above is ok. You can have PVDD on and DVDD/CPVDD off. I would recommend muting and putting the device in powerdown before removing power to DVDD/CPVDD.