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參數(shù)資料
| 型號(hào)： | LM4663 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 2 Watt Stereo Class D Audio Power Amplifier with Stereo Headphone Amplifier |
| 中文描述： | 2瓦特立體聲D類(lèi)音頻功率放大器的立體聲耳機(jī)放大器 |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大小： | 606K |
| 代理商： | LM4663 |
Applications Information
Suggested Application Circuit
The LM4663 achieves its specified performance using the
recommended application circuit shown in Figure 1. The cir-
cuit provides full access to the stereo 2W/channel power am-
plifiers and the 80mW/channel stereo headphone amplifier.
The HPSELECT (headphone select ) input is controlled by a
stereo mini-plug/jack with additional control contact. Other
applications of this device may use external generated logic
signals to control this function.
Control Pins
The LM4663 has three control pins: INSEL, SD, and HPSEL.
The INSEL pin is used to select between the two stereo in-
puts, V
IN1
and V
IN2
. Connecting the INSEL pin to the positive
supply selects V
, whereas pulling it to ground selects
V
. Micropower shutdown operation is selected by pulling
the SD to the positive supply. Applying the positive supply to
the HPSEL pin selects the headphone amplifiers and
grounding the HPSEL pin selects the Class D amplifiers.
Table 1 is a summary of the function selected when applying
ground or V
DD
to the control pins.
TABLE 1. Function selected when applying V
or
GND to the INSEL, SD, and HPSEL control pins.
Control
Function
INSEL
SD
Pin
Apply GND
Apply V
DD
10
9
V
IN1
L & R
Full power
operation
Deactivate
headphone amps
and activate
Class D amps
V
IN2
L & R
Micropower
shutdown
Deactivate Class
D amps and
activate
headphone amps
HPSEL
16
Output Filters
The LM4663’s 2W power amplifiers use a Class D switching
topology that requires a filter between the amplifier outputs
and the load. The balanced, L-C filters shown in Figure 1 use
component values recommended for a maximally flat magni-
tude in the pass-band and a cut-off frequency of 18kHz with
a load impedance of 4
. We do not recommend omitting the
filter because considerable out-of-band energy is present in
the Class D output waveform. This energy would be dissi-
pated in the load impedance’s resistive component, which
diminishes efficiency.
DS101269-3
FIGURE 1. Operating on a single 5V supply, this recommended application circuit is a complete solution with 2W
Class D amplifiers that drive 4
speakers and 80mW amplifiers drive 32
headphones.
L
www.national.com
5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4663MT | 2 Watt Stereo Class D Audio Power Amplifier with Stereo Headphone Amplifier |
| LM4766T | Audio Power Amplifier Series Dual 40W Audio Power Amplifier with Mute |
| LM4766 | Audio Power Amplifier Series Dual 40W Audio Power Amplifier with Mute |
| LM4801 | 1W Stereo Audio Amplifier Plus Adjustable LDO |
| LM4801MH | 1W Stereo Audio Amplifier Plus Adjustable LDO |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4663MT | 制造商:Texas Instruments 功能描述:AMP STEREO CLASS D 2W SMD 4663 |
| LM4663MT | 制造商:Texas Instruments 功能描述:AMP STEREO CLASS D 2W SMD 4663 |
| LM4663MT/NOPB | 功能描述:IC AMP AUDIO PWR 2.1W D 24TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 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(lèi)型:H 類(lèi) 輸出類(lèi)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(lèi)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) |
| LM4663MTX | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LM4664 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Filterless High Efficiency 1.1W Switching Audio Amplifier |
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