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參數(shù)資料
| 型號(hào)： | LA4302T |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 4 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封裝： | 0.225 INCH, TSSOP-20 |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大小： | 178K |
| 代理商： | LA4302T |
LA4302T
No.7462-7/12
Pin Voltages (VCC = 12V, STBY/Mute pin = 12V, BTL/SE pin = 0V or 12V, as measured with a digital voltmeter)
Pin No.
1
2
3
4
5
6
7
8
9
10
Pin
GND (HS)
NC
IN 1
Sig–GND
RF
BTL/SE
SE-Filter
OUT 1a
OUT 1b
GND (HS)
Pin voltage (V)
0
—
3.54
0
5.93
0/12
8.85
6.03
0
Pin No.
11
12
13
14
15
16
17
18
19
20
Pin
GND (HS)
OUT 2a
OUT 2b
NC
VCC1
VCC2
STBY/Mute
IN 2
Not Use
GND (HS)
Pin voltage (V)
0
5.96
—
12
3.54
3.65*
0
* : When Tj is 25
°C. (See the description of the pin 19 function on page 8 for details.)
External Components
C1, C2
: These are the input coupling capacitors; a value of 0.22
F or lower is recommended. If the value
used is too large, the charge time when power is first applied will become longer and impulse noise
problems may be aggravated. Since the LA4302T input resistance is 60k
, the low-frequency
cutoff frequency, fL, at the IC input when C1 and C2 are 0.22F will be close to 12.1Hz.
fL =
1
2
π×C1 (C2) ×Ri
=
1
2
π×0.22F×60k ≈ 12.1 (Hz)
The LA4302T input pin voltages are fixed at about 3.5V. If electrolytic capacitors are used, the DC
potential of the output blocks of the circuit in the previous stage must be taken into consideration
when determining the capacitor polarity.
C3
: This capacitor is used both as a ripple filter and to set the amplifier startup time (the time until an
output is provided after power is first applied). We recommend a value of 100
F. Note that if the
value of this capacitor is too low, the filter's ability to remove low-frequency components will be
reduced and at the same time the amplifier startup time will be reduced, potentially aggravating
impulse noise in the output.
C4, C5
: These are the power supply filter capacitors. It is desirable that the lengths of the lines to the VCC
pin and the power system ground pin in the circuit board pattern be made as short as possible. We
recommend a value of 470
F or higher for C4. If the value of this capacitor is too small, impulse
noise in the output when VCC is turned off may be aggravated. Although C5 may be omitted, it is
desirable that it be included if the pattern for C4 is extended.
C6, C7
(SE operation)
: These are the output coupling capacitors. Since these capacitors, in conjunction with the value of RL,
influence the low band cutoff frequency fL’, fL’ must be taken into consideration when determining
the value of these capacitors. We recommend a value of 1000
F or lower. The low band cutoff
frequency fL’ will be close to 40Hz when C6 and C7 are 1000F and RL is 4.
fL’ =
1
2
π×C6 (C7) ×RL
=
1
2
π×1000F×4 ≈ 40 (Hz)
C8
(SE operation)
: C8 is used as the IC internal power supply line filter for SE operation. This capacitor is used to
stabilize operation when transients occur at power on. We recommend a value in the range 0.047
F
up to 1
F. This capacitor is not shown in the standard BTL usage example circuit, and is not
required. However, a capacitor in the recommended range for SE mode may be used in BTL mode.
Oscillation prevention RC circuits :
These circuits are used if oscillation occurs in the output waveform due to the speaker used. It is
desirable to use capacitors with a low temperature coefficient. See the standard usage examples on
pages 5 and 6.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA-4306 | 制造商:Ideal Industries Inc 功能描述: |
| LA-4308 | 制造商:Ideal Industries Inc 功能描述: |
| LA-4311 | 制造商:Ideal Industries Inc 功能描述: |
| LA4341R11 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| LA43G-G | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
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