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參數(shù)資料
| 型號： | TDA8593J |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 69 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM27 |
| 封裝： | POWER, PLASTIC, SOT-767-1, DIL-BENT-SIL, 27 PIN |
| 文件頁數(shù)： | 31/33頁 |
| 文件大小： | 202K |
| 代理商： | TDA8593J |
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9397 750 14847
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 02 — 3 June 2005
7 of 33
Philips Semiconductors
TDA8593J
I2C-bus controlled 4
× 45 W power amplier
7.8 Speaker protection
If one side of a speaker is connected to ground, a missing current protection is
implemented to prevent damage to the speaker. A fault condition is detected in a channel
when there is a mismatch between the power current in the high side and the power
current in the low side; during a fault condition the channel will be switched off.
The load status of each channel can be read via the I2C-bus: short to ground (one side of
the speaker connected to ground), short to VP (one side of the speaker connected to VP),
and shorted load.
7.9 Line driver mode
An amplier can be used as a line driver by switching it to low gain mode. In normal mode,
the gain between single-ended input and differential output (across the load) is 26 dB. In
low gain mode the gain between single-ended input and differential output is 20 dB.
7.10 Input and AC ground capacitor values
The negative inputs to all four amplier channels are combined at pin ACGND. To obtain
the best performance for supply voltage ripple rejection and unwanted audible noise, the
value of the capacitor connected to pin ACGND must be as close as possible to 4 times
the value of the input capacitor connected to the positive input of each channel.
7.11 DC-load detection
When DC-load detection is enabled, during the start-up cycle, a DC offset is applied
slowly to the amplier outputs, and the output currents are measured. If the output current
of an amplier rises above a certain level, it is assumed that there is a load of less than
6
and bit D5 is reset in the associated data byte register to indicate that a load is
detected.
Because the offset is measured during the amplier start-up cycle, detection is inaudible
and can be performed every time the amplier is switched on.
7.12 I2C-bus address selection
If in the application more ampliers are used, the I2C-bus address of the TDA8593J can
be changed with an external resistor; see Section 8.
7.13 AC-load detection
AC-load detection can be used to detect that AC-coupled speakers are connected
correctly during assembly. This requires at least 3 periods of a 19 kHz sine wave to be
applied to the amplier inputs. The amplier produces a peak output voltage which also
generates a peak output current through the AC-coupled speaker. The 19 kHz sine wave
is also audible during the test. If the amplier detects three current peaks that are greater
than 550 mA, the AC-load detection bit D1 of instruction byte IB1 is set to logic 1. Three
current peaks are counted to avoid false AC-load detection which can occur if the input
signal is switched on and off. The peak current counter can be reset by setting bit D1 of
instruction byte IB1 to logic 0. To guarantee AC-load detection, an amplier current of
more than 550 mA is required. AC-load detection will never occur with a current of less
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| TDA8594J/N1 | 功能描述:音頻放大器 AMPLIFIER 4X50W RoHS:否 制造商:STMicroelectronics 產(chǎn)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 |
| TDA8594J/N1,112 | 制造商:NXP Semiconductors 功能描述: |
| TDA8594J/N1S | 功能描述:音頻放大器 PWR AMP 4x50W RoHS:否 制造商:STMicroelectronics 產(chǎn)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 |
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