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參數(shù)資料
| 型號(hào)： | LM4700MWC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 30 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| 封裝： | WAFER |
| 文件頁數(shù)： | 3/19頁 |
| 文件大?。?/td> | 558K |
| 代理商： | LM4700MWC |
Typical Performance Characteristics (Continued)
Application Information
MUTE MODE
By placing a logic-high voltage on the mute pin, the signal
going into the amplifiers will be muted. If the mute pin is left
floating or connected to a logic-low level, the amplifier will be
in a non-muted state. Refer to the Typical Performance
Characteristics section for curves concerning Mute Attenu-
ation vs Mute Pin Voltage.
STANDBY MODE
The standby mode of the LM4700 allows the user to drasti-
cally reduce power consumption when the amplifier is idle.
By placing a logic-high voltage on the standby pin, the ampli-
fier will go into Standby Mode. In this mode, the current
drawn from the V
CC supply is typically less than 10 A total
for both amplifiers. The current drawn from the V
EE supply is
typically 2.1 mA. Clearly, there is a significant reduction in
idle power consumption when using the standby mode. Re-
fer to the Typical Performance Characteristics section for
curves showing Supply Current vs Standby Pin Voltage for
both supplies.
UNDER-VOLTAGE PROTECTION
Upon system power-up, the under-voltage protection cir-
cuitry allows the power supplies and their corresponding ca-
pacitors to come up close to their full values before turning
on the LM4700 such that no DC output spikes occur. Upon
turn-off, the output of the LM4700 is brought to ground be-
fore the power supplies such that no transients occur at
power-down.
OVER-VOLTAGE PROTECTION
The LM4700 contains over-voltage protection circuitry that
limits the output current to approximately 3.5 Apk while also
providing voltage clamping, though not through internal
clamping diodes. The clamping effect is quite the same,
however, the output transistors are designed to work alter-
nately by sinking large current spikes.
SPiKe PROTECTION
The
LM4700
is
protected
from
instantaneous
peak-temperature stressing of the power transistor array.
The Safe Operating Area graph in the Typical Performance
Characteristics section shows the area of device operation
where SPiKe Protection Circuitry is not enabled. The wave-
form to the right of the SOA graph exemplifies how the dy-
namic protection will cause waveform distortion when en-
abled.
THERMAL PROTECTION
The LM4700 has a sophisticated thermal protection scheme
to prevent long-term thermal stress of the device. When the
temperature on the die reaches 165C, the LM4700 shuts
down. It starts operating again when the die temperature
drops to about 155C, but if the temperature again begins to
rise, shutdown will occur again at 165C. Therefore, the de-
vice is allowed to heat up to a relatively high temperature if
Pulse Power Limit
DS012369-40
Pulse Power Limit
DS012369-41
Supply Current vs
Case Temperature
DS012369-42
Standby Current (I
CC)vs
Standby Pin Voltage
DS012369-43
Supply Current (I
EE)vs
Standby Pin Voltage
DS012369-44
Input Bias Current vs
Case Temperature
DS012369-45
www.national.com
11
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PDF描述 |
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| LM4700T | 30 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM11 |
| LM4700TF/NOPB | 30 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM11 |
| LM4701MWC | 30 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4730TA/NOPB | 14 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| LM4731TA/NOPB | 25 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4700T | 功能描述:IC AMP AUDIO PWR 30W AB TO220-11 RoHS:否 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Overture™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4700T/NOPB | 制造商:Texas Instruments 功能描述: |
| LM4700TF | 制造商:Texas Instruments 功能描述:IC AMP + MUTE 30W 4700 TO-220-11 |
| LM4700TF | 制造商:Texas Instruments 功能描述:IC AMP + MUTE 30W 4700 TO-220-11 |
| LM4700TF/NOPB | 功能描述:IC AMP AUDIO PWR 30W AB TO220-11 RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Overture™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
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