ZHCSBA9C July 2013 – November 2017 TAS5760LD
PRODUCTION DATA.
In both hardware and Software Control mode, the SPK_FAULT pin of the TAS5760LD serves as a fault indicator to notify the system that a fault has occurred with the speaker amplifier by being actively pulled LOW. This pin is an open-drain output pin and, unless one is provided internal to the receiver, requires an external pullup to set the net to a known value. The behavior of this pin varies based upon the type of error which has occurred.
In the case of a latching error, the fault line will remain LOW until such time that the TAS5760LD has resumed normal operation (that is the SPK_SD pin has been toggled and TSPK_FAULT has passed).
With the exception of clock errors, non-latching errors will not cause the SPK_FAULT pin to be pulled LOW. Once a non-latching error has been cleared, normal operation will resume. For clocking errors, the SPK_FAULT line will be pulled LOW, but upon clearing of the clock error normal operation will resume automatically, that is, with no TSPK_FAULT delay.
One method which can be used to convert a latching error into an auto-recovered, non-latching error is to connect the SPK_FAULT pin to the SPK_SD pin. In this way, a fault condition will automatically toggle the SPK_SD pin when the SPK_FAULT pin goes LOW and returns HIGH after the TSPK_FAULT period has passed.
| ERROR | CAUSE | FAULT TYPE | ERROR IS CLEARED BY: |
|---|---|---|---|
| Overvoltage Error
(OVE) |
PVDD level rises above that specified by OVERTHRES(PVDD) | Non-Latching (SPK_FAULT Pin is not pulled LOW) | PVDD level returning below OVETHRES(PVDD) |
| Undervoltage Error
(UVE) |
PVDD voltage level drops below that specified by UVEFTHRES(SPK) | Non-Latching (SPK_FAULT Pin is not pulled LOW) | PVDD level returning above UVETHRES(PVDD)
|
| Clock Error
(CLKE) |
One or more of the following errors has occured:
|
Non-Latching (SPK_FAULT Pin is pulled LOW) | Clocks returning to valid state
|
| Overcurrent Error
(OCE) |
Speaker Amplifier output current has increased above the level specified by OCETHRES | Latching | TSPK_FAULT has passed ANDSPK_SD Pin or Bit Toggle |
| DC Detect Error
(DCE) |
DC offset voltage on the speaker amplifier output has increased above the level specified by the DCETHRES | Latching | TSPK_FAULT has passed ANDSPK_SD Pin or Bit Toggle |
| Overtemperature Error
(OTE) |
The temperature of the die has increased above the level specified by the OTETHRES | Latching | TSPK_FAULT has passed ANDSPK_SD Pin or Bit Toggle AND the temperature of the device has reached a level below that which is dictated by the OTEHYST specification |