TAS5414CTPHDRQ1 Datasheet, PDF (27/39 Pages) Texas Instruments – FOUR-CHANNEL AUTOMOTIVE DIGITAL AMPLIFIERS

TAS5414C-Q1
TAS5424C-Q1
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Operating Modes and Faults
The following tables depict the operating modes and faults.
SLOS795C – SEPTEMBER 2013 – REVISED JULY 2013
STATE NAME
STANDBY
Hi-Z
Mute
Normal operation
OUTPUT FETS
Hi-Z, floating
Hi-Z, weak pulldown
Switching at 50%
Switching with audio
Table 22. Operating Modes
CHARGE PUMP
Stopped
Active
Active
Active
OSCILLATOR
Stopped
Active
Active
Active
I²C
Stopped
Active
Active
Active
AVDD and DVDD
OFF
ON
ON
ON
FAULT OR
EVENT
POR
UV
CP UV
OV
Load dump
OTW
OTSD
FAULT OR
EVENT
CATEGORY
Voltage fault
Thermal warning
Thermal fault
Table 23. Global Faults and Actions
MONITORING
MODES
All
Hi-Z, mute, normal
REPORTING
METHOD
FAULT pin
I²C + FAULT pin
ACTION
TYPE
Hard mute (no ramp)
All
Hi-Z, mute, normal
Hi-Z, mute, normal
FAULT pin
I²C + CLIP_OTW pin
I²C + FAULT pin
None
Hard mute (no ramp)
ACTION
RESULT
Standby
Hi-Z
Standby
None
Standby
LATCHED OR
SELF-
CLEARING
Self-clearing
Latched
Self-clearing
Self-clearing
Latched
Table 24. Channel Faults and Actions
FAULT/
EVENT
FAULT OR EVENT
CATEGORY
Open-short
diagnostic
Clipping
CBC load current
limit
OC fault
DC detect
OT Foldback
Diagnostic
Warning
Online protection
Output channel fault
Warning
MONITORING
MODES
Hi-Z (I²C activated)
Mute / Play
REPORTING
METHOD
I²C
CLIP_OTW pin
I²C + FAULT pin
I²C + CLIP_OTW
pin
ACTION
TYPE
None
None
Current Limit
Hard mute
Hard mute
Reduce Gain
ACTION
RESULT
None
None
Start OC
timer
Hi-Z
Hi-Z
None
LATCHED OR
SELF-
CLEARING
Latched
Self-clearing
Self-clearing
Latched
Latched
Self-clearing
Audio Shutdown and Restart Sequence
The gain ramp of the filtered output signal and the updating of the I²C registers correspond to the MUTE pin
voltage during the ramping process. The value of the external capacitor on the MUTE pin dictates the length of
time that the MUTE pin takes to complete its ramp. With the default 220-nF capacitor, the turnon common-mode
ramp takes approximately 26 ms and the gain ramp takes approximately 76 ms.
Copyright © 2013, Texas Instruments Incorporated
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