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TAS5733L: Schematic Review

Ross Parlour
Intellectual 1340 points
Part Number: TAS5733L

Hi,

The TAS5733L is being considered in for a new design. The part drives up to 2 speakers at 10W. However, the design only has a single 10W speaker. The design uses an I2S audio output, so this is a requirement. This part seems to be cost competitive, even if it is over specified. Can you please review the design and suggest if there is any saving to be made on external components?

Many thanks,

Ross

  • 0
    TI__Expert 6985 points
    Hello Ross! Shawn can look at the attached schematic for you. ALso, have you looked at the mono TAS5720 and TAS5760 www.ti.com/.../tas5720l ? These mono amplifiers are closed loop, and hence design efficient to remove many external components as well as to remove the filter in favor of a simple ferrite bead when operated at lower power levels like 10W. Thanks, Jeff
  • 0
    TI__Mastermind 24835 points

    Hi Ross,

    I reviewed the SCH, and have the following comments:

    1. For cost-down reason, you could use one larger than 100uF capactiors instead of 390uF on the PVDD power supply decoupling.

    2. I found PDN pin is connected to VDD directly. Please find the timing sequence requirement during power-up(Figure 50 in datasheet). RST and PDN have to be pulled to High level after the PVDD power supply is ready. Please delay the ramp-up on PDN pin, maybe a capacitor on PDN pin helps. If this pin can be controlled by a GPIO, it would be even better.

    3. For RST pin, please also follow the time sequence requirement when contolling it by host GPIO.

    4. C56 can be set to DNP.  

    Best regards,

    Shawn Zheng