- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄30719 > LA4663N 20 W, 2 CHANNEL, AUDIO AMPLIFIER, ZFM14 PDF資料下載
參數(shù)資料
| 型號： | LA4663N |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, ZFM14 |
| 封裝： | SIP-14 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大小： | 144K |
| 代理商： | LA4663N |
LA4663N
No.5904-5/10
6
10
μF
22k
Ω
6
+5V
I
About 1.56V
6
5
VSTB
(RSTB)
ISTB
15k
Ω
About 1.4V
External Components
C1 and C2
These are input coupling capacitors, and we recommend that values under 4.7μF be used. The LA4663N
uses a zero bias type input circuit, and the input pin potential is about zero volts. Determine the polarity
orientation of these capacitors based on the DC current from the circuit connected to the LA4663N front end.
If the potential difference between across the + and – leads on the input capacitors is large, the charge time
for the input capacitors can be reduced by using as small a value as possible without causing degradation
of the low band frequency characteristics. This will shorten the time required to reach stable operation
when power is first applied.
C3
*1
This capacitor functions both as a ripple filter and as the amplifier starting time capacitor. We recommend
a value of 47
μF. When the recommended value is used, the BTL SVRR between outputs will be about
63dB, and that between the outputs and ground will be about 47dB. (These are values are for reference
purposes.) Similarly, the starting time (the time between the point power is first applied and the point an
output is generated) will be around 0.6 to 0.7 seconds.
C4 and R1
*2
These form an CR circuit used for muting function smoothing. C4 is required even if the muting function is
not used.
C5
Power supply capacitor.
C6 to C9 and R2 to R5
These components for oscillation prevention CR circuits. We recommend the use of polyester film
capacitors (Mylar capacitors) with excellent temperature characteristics for C6 through C9. (R2 to R5
should all be 2.2
Ω 1/4W resistors.)
Notes: 1. Starting time
The LA4663N includes a built-in starting time circuit. The starting time can be varied somewhat by modifying
the value of the external capacitor connected to pin 1. With the recommended value of 47
μF, the starting time
will be between 0.6 and 0.7 second (although this will vary with the supply voltage, VCC) and this time can be
lengthened to about 0.9 second by inserting a 10
μF capacitor in parallel.
We do not recommend using a value smaller than the recommended value for the pin 1 capacitor, since that
could result in reducing the SVRR with respect to ground.
2. Signal muting function
When the recommended CR circuit (10μF and 22kΩ) is connected to pin 6, the signal muting function can be
turned on, and a muting function with minimal impulse noise applied by applying a voltage of 5V.
The CR circuit determines the attack and recovery times for smoothing function. Note that this 10μF capacitor is
required even when the signal muting function is not used, since it is also used for smoothing after the starting
time has elapsed. The influx current to pin 6 when this external resistor has
a value of 22k
Ω will be about 170μA when the applied voltage is +5V.
Although it is possible to modify the value of this resistor if a different
applied voltage or if the capacity of the microcontroller required it, it is
possible for the level of the impulse noise associated with the muting
function to increase if the pin 6 influx current becomes excessive. Be sure
to take this influx current into account if the value of this resistor is
modified.
Other Notes
Standby function
Pin 5 in this IC is the standby pin, and applying a voltage of 2.0V or higher
will activate this function. The pin 5 influx current for an applied voltage
of 5V will be about 240
μA.
ISTB =
5V
1.4V
15k
Ω
= 240
μA
Insert an external current limiting resistor (RSTB) if it is necessary to limit
this influx current when using a microcontroller.
If this input voltage is applied by a circuit or device other than a
microcontroller, calculate the value for RSTB from the following formula
such that the pin 5 influx current due to the applied VSTB is under 500
μA.
RSTB =
Applied voltage(VSTB)1.4V
500
μA
15kΩ
相關PDF資料 |
PDF描述 |
|---|---|
| LA4663 | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM14 |
| LA4700N | 12 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM18 |
| LA4705 | 18 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM18 |
| LA4708 | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, SFM18 |
| LA47202P | 29 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LA46B-DBKUG-7-PF | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
| LA46B-EG-4-PF | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
| LA46B-EG-9-PF | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
| LA46B-EG-S2-PF | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
| LA46B-EG-S9-PF | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
發(fā)布緊急采購，3分鐘左右您將得到回復。