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Question of the TLV320 AIC3254 Power Consumption

Wayne Chen (Audio AE)
Genius 15950 points
Other Parts Discussed in Thread: TLV320AIC3254

Hello Sirs,

Could you please help check following description what the difference (180mA @ 3.3V, 100uA @1.8V) , thanks.

2.9.1.1.1 Standby Mode (3.3V operation) To put the device in standby mode, the AVDD and DVDD LDOs as well as the Reference Block (Page 1, Register 123, D(2:0) = 101) must stay on, and all other blocks powered down. This state results in a standby current of approximately 180mA. In standby mode, the device responds quickly to playback requests.


2.9.1.2.1 Standby Mode (1.8V operation) To put the device in standby mode, both external voltages (AVDD and DVDD) and the reference block inside the TLV320AIC3254 must stay on (Page 1, Register 123, D(2:0) = 101), all other blocks should be powered down. This state results in standby current of approximately 100μA from the AVDD supply. In standby mode the device responds very quickly to playback requests.

Best regards,

Wayne Chen
08/25/2016

  • 0
    TI__Guru* 84915 points
    Hi, Wayne

    The difference of first standby mode (3.3V) and the second one (1.8V) is the kind of power supply that is being used. The first operation uses AVDD and DVDD generated by the internal LDO. This means that it would require more current consumption to generate the AVDD and DVDD voltages. The second standby mode uses external power supplies. So, there's no need to generate internal LDO. That's why this mode uses less power consumption.

    Best regards,
    Luis Fernando Rodríguez S.