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參數(shù)資料
| 型號： | LA4446 |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 5.5 W, 2 CHANNEL, AUDIO AMPLIFIER, SFM13 |
| 封裝： | SIP-13 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大小： | 104K |
| 代理商： | LA4446 |
LA4446
No.2636-4/8
Printed Pattern Side (copper foil surface)
* : Flat washers and a torque of 4 to 6kgcm must be used when mounting the heat sink.
IC Internal Features
Provides two channels
The purpose of the decoupling capacitor C9 (220
μF) is both to provide a ripple rejection effect and to set the power on
delay time.
The NF capacitor has a causal relationship with the low-band roll-off frequency. See the graph. Note that if it is
desirable to extend fL even further, the output capacitor is also involved.
If it is desirable to reduce impulse noise even further, lowering the gain by adding RNF' to the NF capacitors C1 and
C2 will have an effect.
VG
≈ 20log
Rf
RNF
[dB]
the internal RNF ≈ 50Ω, Rf = 20kΩ
The gain will be about 46dB if individual resistors RNF' of 50Ω are added externally, and the gain will be about 40dB
if 150
Ω resistors are used for RNF'.
The SVRR, THD, and OSC parameters change depending on the printed circuit board pattern layout. The handling of
the large signal ground and the small signal ground, and grounding points for the external components required
special care.
When external audio muting is to be applied intentionally, the IC can be cut off by dropping the decoupling pin (pin 2)
to ground through a 50 to 100
Ω limit resistor.
Protection circuits
Since, the most dangerous of the adjacent pins, VCCout, appears at an inter-pin pitch of 2mm, this IC can easily be
destroyed by solder bridges created during end product manufacturing. For this reason, this IC includes DC short
protection circuits for pins 7 and 8 and for pins 7 and 6. This circuit is designed to operate within the range of voltage
fluctuations common in automotive systems, namely 10.5 to 15.6V.
Overvoltage and surge protection circuit
This circuit is provided to protect against giant pulses of positive surge up to 50V/200ms. Testing must be performed
according to the JASO standards. Note that the overvoltage protection circuit is set up to operate at VCCX = about
24.5V.
Built-in thermal protection circuit
This circuit is provided to protect the IC in abnormal states, such as when cooling has become inadequate or when an
AC load short occurs. The thermal shutdown temperature is set to be Tj = 160°C.
13
1
LA4446
100
×65mm2
OUT2
OUT1
GND
IN2
IN1
GND
VCC
+
47
μF/6.3V
C1
C2
47
μF/6.3V
C9 220
μF/16V
1000
μF/10V
C8
C10
1000
μF/16V
C3
100
μF/10V
C4
100
μF/10V
C7
1000
μF/10V
C6
0.1
μF
C5
0.1
μF
R1 4.7k
Ω
R2 4.7k
Ω
相關PDF資料 |
PDF描述 |
|---|---|
| LA4460N | 12 W, 1 CHANNEL, AUDIO AMPLIFIER, PSFM10 |
| LA4461N | 12 W, 1 CHANNEL, AUDIO AMPLIFIER, PSFM10 |
| LA4465 | 12 W, 1 CHANNEL, AUDIO AMPLIFIER, SFM10 |
| LA4466 | 12 W, 1 CHANNEL, AUDIO AMPLIFIER, SFM10 |
| LA4475 | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM14 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LA4450 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Two Channel Power IC for Bus or Track Use in TV and Home Audio Applications |
| LA4450_10 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Bus and Track in Car Stereo 2-Channel Power Amplifier |
| LA4450-E | 功能描述:音頻放大器 2-CH POWER AMPLIFIER 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 |
| LA4450F-E | 功能描述:音頻放大器 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 |
| LA4450L-E | 功能描述:音頻放大器 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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