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參數(shù)資料
| 型號(hào)： | MAX98306EVKIT# |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 14/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | KIT EVAL FOR MAX98306 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 放大器類型： | D 類 |
| 輸出類型： | 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： | 3.2W x 2 @ 4 歐姆 |
| 電源電壓： | 2.6 V ~ 5.5 V |
| 板類型： | 完全填充 |
| 已用 IC / 零件： | MAX98306 |
| 已供物品： | 板 |
_______________________________________________________________________________________ 9
MAX98306
Stereo 3.7W Class D Amplifier
Detailed Description
The MAX98306 features low quiescent current, a low-
power shutdown mode, comprehensive click-and-pop
suppression, and excellent RF immunity.
The IC offers Class AB audio performance with Class D
efficiency in a minimal board-space solution.
The Class D amplifier features spread-spectrum modula-
tion, active emissions limiting, edge-rate, and overshoot
control circuitry that offers significant improvements to
switch-mode amplifier radiated emissions.
The amplifier also features click-and-pop suppression
that reduces audible transients on startup and shut-
down, as well as thermal-overload and short-circuit
protection.
Class D Speaker Amplifier
The filterless Class D amplifier output stage offers much
higher efficiency than Class AB amplifiers. The high effi-
ciency of a Class D amplifier is due to the pulse-width
modulated (PWM) rail-to-rail switching operation of the
output stage transistors. This ensures that any power
loss associated with the Class D output stage is mostly
due to the I2R loss of the MOSFET on-resistance and
quiescent current overhead.
EMI Filterless Output Stage
Traditional Class D amplifiers require the use of external
LC filters, or shielding, to meet EN55022B electromag-
netic-interference (EMI) regulation standards. Maxim’s
active-emissions-limiting edge-rate control circuitry and
spread-spectrum modulation reduce EMI emissions,
while maintaining up to 92% efficiency.
Spread-spectrum modulation and active emissions limit-
ing limit wideband spectral components, while propri-
etary techniques ensure that the cycle-to-cycle varia-
tion of the switching period does not degrade audio
reproduction or efficiency. The IC’s spread-spectrum
modulator randomly varies the switching frequency by
Q
20kHz around the center frequency (320kHz). Above
10MHz, the wideband spectrum looks like noise for EMI
purposes (Figure 1).
Speaker Current Limit
If the output current of the speaker amplifier exceeds
the current limit (3A typ), the IC disables the outputs for
approximately 100Fs. At the end of 100Fs, the outputs
are reenabled. If the fault condition still exists, the IC
continues to disable and reenable the outputs until the
fault condition is removed.
Selectable Gain
The IC offers five programmable gains selected using
the GAIN input.
Shutdown
The IC features a low-power shutdown mode, drawing
P
1FA (typ) of supply current. Drive SHDN low to place
the MAX98306 into shutdown. Drive SHDN above 1.4V
for normal operation.
Click-and-Pop Suppression
The IC speaker amplifier features Maxim’s comprehen-
sive click-and-pop suppression. During startup, the
click-and-pop suppression circuitry reduces any audible
transient sources internal to the device. When entering
shutdown, the differential speaker outputs ramp down to
PGND quickly and simultaneously.
Table 1. Gain Control Configuration
Figure 1. EMI with 12in of Speaker Cable and No Output Filter
GAIN PIN
MAXIMUM GAIN (dB)
Connect to PGND
18
Connect to PGND through
100kI
±5% resistor
15
Connect to PVDD
12
Connect to PVDD through
100kI
±5% resistor
9
Unconnected
6
FREQUENCY (MHz)
EMISSIONS
LEVEL
(dBV/m)
900
800
600 700
200 300 400 500
100
0
10
20
30
40
50
60
70
80
90
-10
0
1000
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX98306EVKIT# | 功能描述:音頻 IC 開發(fā)工具 MAX98306 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX98307ETE+ | 功能描述:音頻放大器 3.3W Mono Class D Amplifier 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 |
| MAX98307ETE+T | 功能描述:音頻放大器 3.3W Mono Class D Amplifier 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 |
| MAX98307EVKIT# | 功能描述:音頻 IC 開發(fā)工具 MAX98307 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX98308EWC+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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