SLOA250C July   2017  – June 2022 TAS2505 , TAS2505-Q1

 

  1.   Abstract
  2. 1Trademarks
  3. 2What are Diagnostics and Why are They Important?
  4. 3Diagnostics Features in TAS2505
    1. 3.1 Short Circuit Detection
    2. 3.2 Over-Temperature Detection
  5. 4External Diagnostics
    1. 4.1 Diagnostic Circuit #1
    2. 4.2 Communication to Host and Action
    3. 4.3 Diagnostic Circuit #2
    4. 4.4 Diagnostic Circuit #3
  6. 5Revision History

3.1 Short Circuit Detection

TAS2505 detects and self protects against the following faults:

  • Short to Ground
  • Short to Power
  • Short between Speaker terminals

When the amplifier detects these above errors, it shuts down and an internal flag is raised. This flag can be read with I2C by looking at the register map, as seen below in Table 3-1. When any of the above mentioned faults occur, page 1, 0x2D bit 1 is cleared to 0. The host processor can monitor this bit during normal operation to detect the presence of a fault condition.

Table 3-1 Page 1, Register 45: Speaker Amplifier Control 1 – 0x01/0x2D
BITTYPERESETDESCRIPTION
D7–D2R0000 00Reserved. Write only reset values.
D1R/W0Speaker Power Driver

0: SPK output driver is powered down (Bit Clear during normal operations indicates fault).

1: SPK output driver is powered up.

D0R0Reserved. Write only reset values.