Part Number: TAS6424M-Q1
Tool/software:
Hello Audio team,
Similar to the question: TAS6424M-Q1: output power vs vbatt input range - Audio forum - Audio - TI E2E support forums
I am testing the device TAS6424M-Q1 and I am not able to get the output power according to the Figure 10 defined in the datasheet.
The maximum output power I am getting is approximately 12W with the followings configurations:
PVDD: 14.4V
Speaker load: 4ohms.
Fsw: 2.1MHz.
Fs: 48KHz. Register 0x03 = 0x44.
Gain: 15V/FS, Register 0x01 = 0x31.
Channel volume 1: Register 0x05 = 0xE5 (11 db, according to the steps of 0.5db)
Not limit current.
I am looking get 20W at the output with PVDD 14.4V. (the input range for normal operation for the current application is 9V-16V).
Do you have any recommendation to get the 20W as output power?
I have been changing the volume channel register, but while it increase, signals are clipped, so I guess the distortion is happening.
Thanks!!
Part Number: TAS6424MS-Q1
Tool/software:
Hello Expert,
Could we use following specification for TDM mode?
Best regards,
Kazuki Kuramochi
Part Number: TAS6424M-Q1
We are considering using the TAS6424M-Q1 in PBTL mode with a 1ohm load.
We refer to "Figure 82. TAS6424M-Q1 Typical 2-Channel PBTL Application Schematic" in the Datasheet.
The output current of the amplifier will be higher than 4ohm because of the 1ohm load condition.
One of the problems is that the current balance may not be equal at the two output terminals of the same channel due to variations in specifications such as the inductor value and DCR value of the output coils used in PBTL mode.
Example: Relationship between OUT_1P (pin 34) and OUT_1M (pin 32) and between OUT_2P (pin 40) and OUT_2M (pin 38)
In this case, does the TAS6424M-Q1 have a problem with current imbalance?
Or does it have to maintain a moderate current balance to maintain stable operation and electrical characteristics?
We would like some advice.
Generally, for normal BTL, we use a 2-in-1 output coil and design it for push/pull operation to minimize variation.
We would appreciate your opinion.
Part Number: TAS6424M-Q1
Hi TI
The customer found the following abnormal phenomena during testing TAS6424M-Q1:
The TAS6424M-Q1 driver does not have any abnormalities with speakers without a frequency divider, but there is a probability that speakers with an LC frequency divider may not be able to output sound properly. The customer tested 16 chips and found that 5 of them had this phenomenon;
Please help analyze the possible reasons. Thank you。
Part Number: TAS6424MS-Q1
Please check the Rjc(top) is 0.4°C/W or 0.7°C/W of TAS6424MS-Q1.
It's 0.4°C/W in 7.4 Thermal Information but 0.7°C/W in Table 12-1 of tis Datasheet.
Thank you
Part Number: TAS6424MS-Q1
Hi team,
My customer is asking if TAS6424MS-Q1 supports spread spectrum.
I can see it supports on TAS6424E-Q1; however, i cannot find it on MS datasheet (slose66).
Can you look into it?
Thanks,
Luke
Part Number: TAS6424M-Q1
Hello team
I want to ask the question for TAS6424M-Q1.
When we use it in PBTL mode, what is the impedance of the speaker that we can diagnose?
In datasheet, the minimum speaker impedance of TAS6424M-Q1 is 1 ohm in PBTL mode.
However, I can't find detail information of DC/AC Diagnostics in PBTL mode. Sorry.
Below is my understanding.
According to the table on p. 9, [AC impedance accuracy] is from 2ohm to 16ohm.
2ohm is the minimum impedance that can be diagnosed on a single channel output, correct?
When using 1ohm speakers with PBTL, I would expect each channel to run diagnostics at 2 ohms.
Is it correct?
Part Number: TAS6424M-Q1
Hi Team,
From the TAS6424M-Q1 datasheet, the absolute maximum rating of VDD is only 3.5V, is there any tolerance? In my point of view, if maximum recommended condition is 3.5V, the absolute maximum rating should be higher, right?
Because our front-end buck may generate 3.8V voltage spike on VOUT when voltage cranking, I am worried that the VDD of TAS6424M-Q1 may be damaged.
Could we guarantee the VDD can endure 3.8V spike in 50us?
Regards,
Roy
Part Number: TAS6424M-Q1
Now I'm calculating the ripple current of the output inductor. Is the idle state ripple current the maximum ripple current that flows through the inductor.