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參數(shù)資料
| 型號： | TAS5715PHPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 41.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| 封裝： | 7 X 7 MM, GREEN, PLASTIC, HTQFP-48 |
| 文件頁數(shù)： | 40/74頁 |
| 文件大小： | 2771K |
| 代理商： | TAS5715PHPR |
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HP/
(SE/
)
SPKR
BTL
VALID
PWM_A(L+)
PWM_C(R+)
PWM_B(L–)
PWM_D(R–)
I C:SCL
SDA
2
HPSD
FAULT
(A0/
)
PDN
t
(mute)
Enter
ACSD
Enable
FAULT
Disable
FAULT
Unmute
HP
Config
Mute
Exit
ACSD
HPL/R
t
(exitSDHPamp)
t
(enterSDHPamp)
t
(exitSDHP)
T0454-01
=1Output
FAULT
Hi-Z(Ext.Pulldown)
www.ti.com
SLOS645 – AUGUST 2010
Headphone-Mode All-Channel Shutdown
PARAMETE
DESCRIPTION
MIN
TYP
MAX
UNIT
R
5 + 1.3 ×
t(mute)
Mute volume ramp wait time (t(volramp) given by register 0x0E <2:0>)
ms
t(volramp)
Exit shutdown wait time before enabling external headphone amp (t(HPchg)
t(exitSDHP)
1 + 1.3 × t(HPchg)
ms
given by register 0x1A<6:5>)
Headphone amp exit shutdown wait time before unmuting (t(HPamp) given by
1 + 1.3 ×
t(exitSDHPamp)
ms
register 0x1C<7:4>)
t(HPamp)
Headphone amp enter shutdown wait time before entering ACSD (t(HPamp)
1 + 1.3 ×
t(enterSDHPamp)
ms
given by register 0x1C<7:4>)
t(HPamp)
Figure 59. Headphone Control ACSD
Applying Soft Reset
To soft-reset the device, write 0x01 to register 0xC8. Once soft reset is applied, I2C commands should not be
sent for a duration of 2 × (1 ms + 1.3 × t(start/stop)) + 13.5 ms.
Restrictions in Using 432-kHz Output Switching
Only 48-kHz LRCLK is supported. The maximum allowed variance on LRCLK is 1%.
The maxmimum allowed MCLK frequency is 12.288 MHz + 1%.
Only 64-fS SCLK is supported.
PWM headphone output is not supported.
I
2C Commands to enable 423-kHz Switching
All I2C write operations should be at 100 kHz when used in this higher switching mode.
No 400-kHz I2C is supported when used in this mode.
To switch into 432-kHz switching mode, send the following commands before sending the exit shutdown
command to register 0x05.
Write to register 0xF8 with a value of 0xA5A5A5A5.
Copyright 2010, Texas Instruments Incorporated
45
Product Folder Link(s): TAS5715
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