Tool/software:
Hi all. Kindly need your support in this. We are using 2 TAS6584 amplifiers in our project. We are facing audio loss in some channels when thermal chamber testing is done. We do have a heat sink on the amplifier. The following registers are configured:
CURRENT_SENSE - 0x0f
ASI_CTRL0 - 0x00
ASI_CTRL1 - 0x14
ASI_CTRL3 - 0x0f
ASI_CTRL5 - 0x0f
ASI_CTRL8 - 0x01
ASI_CTRL9 - 0x00
ASI_CTRL12 - 0x00
ASI_CTRL13 - 0x81
ASI_CTRL14 - 0x01
ASI_CTRL15 - 0x00
ASI_CTRL17 - 0x03
DIG_VOL_CH1 - 0x30
DIG_VOL_CH2 - 0x30
DIG_VOL_CH3 - 0x30
DIG_VOL_CH4 - 0x30
DSP_CTRL2 - 0x00
AGAIN1 - 0x00
AGAIN2 - 0x00
AGAIN3 - 0x00
AGAIN4 - 0x00
DC LDG Ctrl 1 - 0x01
ANA_CTRL2 - 0x03
STATE_CTRL0 - 0x44
STATE_CTRL1 - 0x44
Switching frequency - 384KHz
Modulation mode - 1SPW
OT warning level - 121*C
Input voltage to amplifier is 24V
and Audio gain at DSP is -32db
The amplifier reaches the temperature: 142.91*C and OTW TGFB Warn Status Register is 0x1f.
We also have tried with BD modulation and switching frequency 2.1MHz
At room temperature testing: (1W/ch) amplifiers started to turn on and off audio on channels after few minutes
thermal chamber 88degC testing: (2V(1W)), 1st and 4th channel of 1st amplifier & 2nd and 4th channel of 2nd amplifier are turning OFF and ON.
Can anyone pls suggest a solution for this?
