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參數資料
| 型號： | TS4975EIJT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PBGA12 |
| 封裝： | LEAD FREE, FLIP CHIP, 12 PIN |
| 文件頁數： | 15/36頁 |
| 文件大小： | 870K |
| 代理商： | TS4975EIJT |
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Application Information
TS4975
22/36
4
Application Information
The TS4975 integrates 2 monolithic power amplifiers. The amplifier output can be configured
as either SE (single-ended) capacitively-coupled output or PHG (phantom ground) output.
Figure 1 on page 3 and Figure 2 on page 4 show schemes of these two configurations and
Section 4.2: Output configuration describes these configurations.
This chapter gives information on how to configure the TS4975 in application.
4.1
IC bus interface
The TS4975 uses a serial bus, which conforms to the IC protocol (the TS4975 must be
powered when it is connected to IC bus), to control the chip’s functions with two wires: Clock
and Data. The Clock line and the Data line are bi-directional (open-collector) with an external
chip pull-up resistor (typically 10 kOhm). The maximum clock frequency in Fast-mode specified
by the IC standard is 400kHz, which TS4975 supports. In this application, the TS4975 is
always the slave device and the controlling micro controller MCU is the master device.
The ADD pin is allows one to set one of two possible 7-bit device addresses. This setting is
needed for when a number of chips are connected to the same bus (for example two TS4975
devices), to avoid address conflicts. The two possible TS4975 addresses are:
●
$CCh when the ADD pin is connected to logic low voltage,
●
$CEh when ADD pin is connected to logic high voltage.
Table 8 summarizes the pin descriptions for the IC bus interface.
Table 8.
IC bus interface pin descriptions
4.1.1
IC bus operation
The host MCU can write into the TS4975 control register to control the TS4975, and read from
the control register to get a configuration from the TS4975. The TS4975 is addressed by the
byte consisting of 7-bit slave address and R/W bit.
Table 9.
The first byte after the START message for addressing the device
In order to write data into the TS4975, after the “start” message, the MCU must send the
following data:
●
send byte with the IC 7-bit slave address and with a low level for the R/W bit
●
send the data (control register setting)
Pin
Functional Description
SDA
This is the serial data pin
SCL
This is the clock input pin
ADD
User-setable portion of device’s I2C address
A6
A5
A4
A3
A2
A1
A0
R/W
110
0
1
A0
X
相關PDF資料 |
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|---|---|
| TS4982IQT | 2 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC32 |
| TS4984EIJT | 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA15 |
| TS4984EIKJT | 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA15 |
| TS4984EKIJT | 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA15 |
| TS4984IQT | 1 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC16 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TS4982IQT | 功能描述:音頻放大器 2W Stereo Audio Amp 125 mW 16 ohm 3 lvl RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TS4984 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 x 1W Stereo audio power amplifier with active low standby mode |
| TS4984EIJT | 功能描述:音頻放大器 2x1.2W stereo audio RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TS4984EIKJT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2W Stereo Audio Power Amplifier with Active Low Standby Mode |
| TS4984FC | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2W Stereo Audio Power Amplifier with Active Low Standby Mode |
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