參數(shù)資料
型號： TAS5719PHP
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48
封裝： 7 X 7 MM, GREEN, PLASTIC, HTQFP-48
文件頁數(shù)： 46/67頁
文件大?。?/td> 1043K
代理商： TAS5719PHP
SLOS655A
– NOVEMBER 2010 – REVISED FEBRUARY 2011
OSCILLATOR TRIM REGISTER (0x1B)
The TAS5717/9 PWM processor contains an internal oscillator to support autodetect of I2S clock rates. This
reduces system cost because an external reference is not required. Currently, TI recommends a reference
resistor value of 18.2 k
(1%). This should be connected between OSC_RES and DVSSO.
Writing 0x00 to register 0x1B enables the trim that was programmed at the factory.
Note that trim must always be run following reset of the device.
Table 17. Oscillator Trim Register (0x1B)
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
1
–
Reserved(1)
–
0
–
Oscillator trim not done (read-only)(1)
–
1
–
Oscillator trim done (read only)
–
0
–
Reserved(1)
–
0
–
Select factory trim (Write a 0 to select factory trim; default is 1.)
–
1
–
Factory trim disabled(1)
–
0
Reserved(1)
(1)
Default values are in bold.
BKND_ERR REGISTER (0x1C)
When a back-end error signal is received from the internal power stage, the power stage is reset, stopping all
PWM activity. Subsequently, the modulator waits approximately for the time listed in Table 18 before attempting
to re-start the power stage.
Table 18. BKND_ERR Register (0x1C)
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
0
–
Headphone enable time = 0 ms
0
1
–
Headphone enable time = 2 ms
0
1
0
–
Headphone enable time = 4 ms
0
1
–
Headphone enable time = 6 ms
0
1
0
–
Headphone enable time = 8 ms
0
1
0
1
–
Headphone enable time = 10 ms(1)
0
1
0
–
Headphone enable time = 12 ms
0
1
–
Headphone enable time = 14 ms
1
0
–
Headphone enable time = 16 ms
1
0
1
–
Headphone enable time = 18 ms
1
0
1
0
–
Headphone enable time = 20 ms
1
0
1
–
Headphone enable time = 22 ms
1
0
–
Headphone enable time = 24 ms
1
0
1
–
Headphone enable time = 26 ms
1
0
–
Headphone enable time = 28 ms
1
–
Headphone enable time = 30 ms
–
0
1
0
Set back-end reset period to 299 ms(1)
–
0
1
Set back-end reset period to 449 ms
–
0
1
0
Set back-end reset period to 598 ms
–
0
1
0
1
Set back-end reset period to 748 ms
–
0
1
0
Set back-end reset period to 898 ms
–
0
1
Set back-end reset period to 1047 ms
–
1
0
Set back-end reset period to 1197 ms
(1)
Default values are in bold.
50
2010–2011, Texas Instruments Incorporated
Product Folder Link(s): TAS5717 TAS5719
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