参数资料
型号: TAS5719PHPR
厂商: TEXAS INSTRUMENTS INC
元件分类: 音频/视频放大
英文描述: 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48
封装: 7 X 7 MM, GREEN, PLASTIC, HTQFP-48
文件页数: 52/67页
文件大小: 1043K
代理商: TAS5719PHPR
HPL_IN
HPL_OUT
S0490-01
V
OUT
V
IN
R
1
R
2
SLOS655A
– NOVEMBER 2010 – REVISED FEBRUARY 2011
USING HEADPHONE AMPLIFIER IN TAS5717
This device has a stereo output which can be used as a line driver or a headphone driver that can output 2-Vrms
stereo. An audio system can be set up for different applications using this device.
Case 1
– Headphone (HP)/Line Drive With Analog Input:
The device can be represented as shown in Figure 46: analog inputs (single-ended) as HPL_IN (pin 1) and
HPR_IN (pin 4) with the outputs HPL_OUT (pin 2) and HPR_OUT (pin 3).
Figure 46. Headphone/Line Driver with Analog Input
HP_SD pin can be used turn ON/OFF the headphone amplifier/line driver.
Speaker channels are independent of headphone/line driver in this mode.
Case 2
– Headphone With I2S Input:
Hardware setup: The HP_PWML and HP_PWMR signals should be fed into a low-pass filter (LPF), and the
output of the LPF is fed to analog inputs (HPL_IN and HPR_IN). The A_SEL pin has a 15-k
Ω pulldown to ground
and should be routed to headphone amplifier enable (HP_SDZ pin 33).
Software setup: Write to register 0x05 bits D4 = 1, D1 = 1, and D0 = 1 (13 hex). When D4 and D1 are set to 1,
the A_SEL pin goes high and thus enables the headphone output. When register 0x05 D4 = 1, the device is in
headphone mode and the speaker outputs are in shutdown.
NOTE: The speaker and headphone cannot be used at the same time as they both share the same digital
channel. DAP can be used for headphone volume.
56
2010–2011, Texas Instruments Incorporated
Product Folder Link(s): TAS5717 TAS5719
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