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參數(shù)資料
| 型號(hào)： | LA4628 |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM14 |
| 封裝： | SIP-14 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大小： | 125K |
| 代理商： | LA4628 |
LA4628
No.6632-4/8
Pin Voltages
VCC = 13.5V, with 5V applied to STBY through a 10k resistor, RL = 4, Rg = 0
Pin No.
1
2
3
4
5
6
7
Pin name
IN1
DC
PRE–GND
STBY
ON TIME
IN2
POP
Pin voltage
1.55V
6.63V
0V
3.21V
2.32V
1.55V
2.07V
Pin No.
8
9
10
11
12
13
14
Pin name
+OUT2
-OUT2
PWR–GND
+OUT1
PWR–GND
-OUT1
VCC
Pin voltage
6.6V
6.5V
0V
6.5V
0V
6.6V
13.5V
External Components
C1 and C4
: Input capacitors. A value of 2.2F 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 fL 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 33F.
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 0.1F is recommended.
C10
: Impulse noise reduction capacitor. A value of 0.47F 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 VCC or to ground when higher VCC
voltages (approximately 16V or higher) are used.
R1
: Standby switch current limiting resistor. A value of 10k
is recommended when a voltage in the
range 2.5 to 13.5V 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 2.5V
or higher must be applied through an external
resistor to turn the amplifier on.
If a voltage of over 13.5V 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 500A.
<applied voltage>
1.4
R1 =
500
A
10k
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.
4
R1
10k
500A or lower
About 1.4V
(2VBE)
Pin 4 Internal Equivalent Circuit
Applied standby
voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA4628_08 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For General Audio 20W 2-Channel BTL Power Amplifier |
| LA4628-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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| 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:Sanyo Semicon Device 功能描述:Two-Channel Audio Frequency Power Amplifier |
| LA4630 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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