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參數(shù)資料
| 型號： | LV47011P-E |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 6/10頁 |
| 文件大小： | 0K |
| 描述： | IC AUDIO AMP BTL 50W 4CH HZIP25 |
| 標(biāo)準(zhǔn)包裝： | 15 |
| 類型： | AB 類 |
| 輸出類型： | 4-通道（四路） |
| 在某負(fù)載時最大輸出功率 x 通道數(shù)量： | 29W x 4 @ 4 歐姆 |
| 電源電壓： | 8 V ~ 16 V |
| 特點(diǎn)： | 靜音，短路和熱保護(hù) |
| 安裝類型： | * |
| 供應(yīng)商設(shè)備封裝： | * |
| 封裝/外殼： | * |
| 包裝： | * |
LV47011P
No.A1838-5/10
4. Self-diagnostics function (pin 25)
By detecting the unusual state of the IC, the signal is output to the pin 25.
Also, by controlling the standby switch after the signal of the pin 25 is detected by the microcomputer, the burnout of
the speaker can be prevented.
(1) Shorting to VCC/Shorting to ground : The pin 25 becomes the low level.
(2) Load shorting
: The pin 25 is alternated between the low level and the high level
according to the output signal.
(3) Output offset detection
: when the output offset voltage exceeds the detection threshold voltage,
the pin 25 becomes the low level.
* Note: The output offset abnormality is thought of as the leakage current of the input capacitor.
In addition, the pin 25 has become the NPN open collector output (active low).
The pin 25 must be left open when this function is not used.
5. Sound quality (low frequencies)
By varying the value of input capacitor, low-frequency characteristic can be improved.
However, it is concerned the shock noise. Please confirm in each set when the capacitance value varies.
6. Pop noise
For pop noise prevention, it is recommended to use the muting function at the same time.
Please turn on the muting function simultaneously with power supply on when the amplifier is turned on. Next, turn
off the muting function after the output DC potential stabilization.
When the amplifier is turn off, turn off the power supply after turning on the muting function.
7. Oscillation stability
Pay due attention on the following points because parasitic oscillation may occur due to effects of the capacity load,
board layout, etc.
(1) Capacity load
When the capacitor is to be inserted between each output pin and GND so as to prevent electric mirror noise, select
the capacitance of maximum 1500pF. (Conditions : Our recommended board, RL = 4)
(2) Board layout
Provide the VCC capacitor of 0.1F in the position nearest to IC.
PREGND must be independently wired and connected to the GND point that is as stable as possible, such as the
minus pin of the 2200
F VCC capacitor.
In case of occurrence of parasitic oscillation, any one of following parts may be added as a countermeasure.
Note that the optimum capacitance must be checked for each set in the mounted state.
Series connection of CR (0.1F and 2.2) between BTL outputs
Series connection of CR(0.1F and 2.2) between each output pin and GND.
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| LV47017P-E | 功能描述:音頻放大器 CAR AUDIO POWER SUPPLY 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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