參數(shù)資料
型號： LM4936
廠商： National Semiconductor Corporation
英文描述： Stereo 2W Audio Power Amplifiers with Volume Control and Selectable Control Interface (SPI or I2C)
中文描述： 2W的立體聲音頻功率放大器，帶有音量控制和可選控制接口（SPI或I2C）
文件頁數(shù)： 7/28頁
文件大?。?/td> 1490K
代理商： LM4936
TABLE 1. I
2
C/SPI Interface Controls
(Note 18)
B7
B6
B5
B4
B3
B2
B1
B0
I
2
C
Address
Mode
Control
Register
Volume
Control
Register
(See
Table 4 )
1
1
0
1
1
0
ID
0
0
0
0
HP
Control
Gain Sel
Mode
Mute
Shutdown
1
0
0
V4
V3
V2
V1
V0
TABLE 2. Headphone Control
HP Sense Pin
0
0
1 (V
DD
)
1 (V
DD
)
I
2
C/SPI HP Control (B4)
0
1
0
1
Output Stage Configuration
BTL
SE
SE
SE
TABLE 3. Logic Controls
Logic Level
0
1
B3 (Gain Sel)
Internal Gain
External Gain
B2 (Mode)
Fixed Volume, 0dB
Adjustable Volume
B1 (Mute)
Mute Off (Play)
Mute On
B0 (Shutdown)
Device Shutdown
Device Active
I
2
C/SPI Select
I
2
C mode
SPI mode
Note 18:
If system beep is detected on the Beep In pin, the system beep will be passed through the bridged amplifier regardless of the logic of the Mute and HP
Control bits (B1, B4) and HP Sense pin.
L
www.national.com
7
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