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參數(shù)資料
| 型號(hào)： | LA4628 |
| 廠(chǎng)商： | Sanyo Electric Co.,Ltd. |
| 元件分類(lèi)： | 音頻放大器 |
| 英文描述： | Two-Channel 20 W BTL Audio Power Amplifier |
| 中文描述： | 雙通道20瓦橋接音頻功率放大器 |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大?。?/td> | 98K |
| 代理商： | LA4628 |
Pin Voltages
V
CC
= 13.5 V, with 5 V applied to STBY through a 10 k
resistor, RL = 4
, Rg = 0
External Components
C1 and C4: Input capacitors. A value of 2.2 μF is recommended. Determine the polarity based on the DC potential of the
circuit connected directly to the LA4628 front end. Note that the low band response can be adjusted by
varying f
L
with the capacitors C1 and C4.
C2: Decoupling capacitor (ripple filter)
C3: Sets the amplifier starting time, which will be approximately 0.6 seconds for a value of 33 μF. The starting
time is proportional to the value of this capacitor, and can be set to any desired value.
C5: Power-supply capacitor
C6, C7, C8, and C9:
Oscillation prevention capacitors. Use polyester film capacitors (Mylar capacitors) with excellent
characteristics. (Note that the series resistors R2, R3, R4, and R5 are used in conjunction with these
capacitors to achieve stable amplifier operation.) A value of 0.1 μF is recommended.
C10: Impulse noise reduction capacitor. A value of 0.47 μF is recommended. Caution is required when selecting
the value for this capacitor, since increasing its value influences the operation of the circuits that protect
against shorting the amplifier output pins to V
CC
or to ground when higher V
CC
voltages (approximately
16 V or higher) are used.
R1: Standby switch current limiting resistor. A value of 10 k
is recommended when a voltage in the range 2.5
to 13.5 V will be applied as the standby switching voltage. Note that this resistor is not optional: it must be
included.
IC Internal Characteristics and Notes
1. Standby function
Pin 4 is the standby switch. A voltage of 2.5 V or
higher must be applied through an external resistor to
turn the amplifier on.
If a voltage of over 13.5 V will be applied as the
standby mode switching voltage, use the following
formula to determine the value of R1 so that the
current entering at pin 4 remains under 500 μA.
<applied voltage> – 1.4
R1 = —————————— – 10 k
500 μA
2. Muting function
Pin 5 connects the capacitor that determines the starting time to prevent impulse noise. It can also be used to mute
the amplifier output by shorting pin 5 to ground. When this function is used, the recovery time depends on C3.
No. 6632-4/8
LA4628
Pin No.
1
2
3
4
5
6
7
Pin
IN1
DC
PRE–GND
STBY
ON TIME
IN2
POP
Pin voltage
1.55 V
6.63 V
0 V
3.21 V
2.32 V
1.55 V
2.07 V
Pin No.
8
9
10
11
12
13
14
Pin
+OUT2
–OUT2
PWR–GND2
+OUT1
PWR–GND1
–OUT1
V
CC
13.5 V
Pin voltage
6.6 V
6.5 V
0 V
6.5 V
0 V
6.6 V
4
Applied standby
voltage
R1
500
μ
A or lower
Pin 4 Internal Equivalent Circuit
About 1.4 V
(2 V
BE
)
10 k
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LA4628_08 | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:For General Audio 20W 2-Channel BTL Power Amplifier |
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| LA4628L-E | 制造商:ON Semiconductor 功能描述:AUDIO AMPLIFIER BTL 2CH - Ammo Pack |
| LA4629 | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:Two-Channel Audio Frequency Power Amplifier |
| LA4630 | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述: |
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