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參數(shù)資料
| 型號(hào)： | MAX98307ETE+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 5/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUD 3.3W MONO DG 16TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 類型： | DG 類 |
| 輸出類型： | 1-通道（單聲道） |
| 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量： | 3.3W x 1 @ 8 歐姆 |
| 電源電壓： | 2.6 V ~ 5.25 V |
| 特點(diǎn)： | 消除爆音，差分輸入，短路和熱保護(hù)，關(guān)閉 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 16-TQFN-EP（3x3） |
| 封裝/外殼： | 16-WFQFN 裸露焊盤 |
| 包裝： | 管件 |
Maxim Integrated Products 13
MAX98307/MAX98308
3.3W Mono Class DG Multilevel Audio Amplifier
Detailed Description
The MAX98307/MAX98308 fully differential mono Class
DG multilevel power amplifiers with integrated inverting
charge pumps offer highly efficient, high-power audio
solutions for portable applications.
The new Class DG multilevel modulation scheme extends
the dynamic range of the output signal by employing a
charge-pump-generated negative rail, which is used as
needed to extend the supply range. When the negative
rail is not needed, the output is drawn entirely from the
standard supply. This scheme results in high efficiency
over a wide output power range.
The power amplifier incorporates active emissions limit-
ing edge rate and overshoot control circuitry in combi-
nation with the multilevel output modulation scheme to
greatly reduce EMI. These features eliminate the need for
output filtering as compared to traditional Class D ampli-
fiers, which reduces an application’s component count.
The MAX98307 has an adjustable gain set by external
resistors. The MAX98308 has preset fixed gains of 8.5dB,
11.5dB, 14.5dB, 17.5dB, and 20.5dB set by a gain select
input (GAIN).
Class DG Multilevel Operation
The ICs’ filterless Class DG multilevel amplifiers feature
a proprietary Maxim output stage that offers higher effi-
ciency over a greater output power range than previous
amplifiers. The amplifier combines Class D switching
output efficiency and Class G supply level shifting with a
multilevel output modulation scheme that with a 5V supply
has efficiency better than 80% efficiency over the 0.35W
to 2.2W output range.
The Class DG multilevel output stage uses pulse-width
modulation (PWM), a rail-to-rail digital output signal with
variable duty cycle, to approximate an analog input signal
as in a Class D amplifier. Rail-to-rail operation ensures that
any dissipation at the output is due solely to the RDS(ON)
of the power output MOSFETs. The Class DG multilevel
output stage also senses the magnitude of the output
signal and switches the supply rails as needed to more
efficiently supply the required signal power. For a low out-
put signal swing requirement (below the battery supply rail
VPVDD), the output range is between VPVDD and ground.
When output swing above VPVDD is required, VPVSS, an
internal inverting charge-pump-generated negative rail
replaces ground as the lower supply. The high output
swing range is then VPVDD to VPVSS, approximately dou-
ble the low swing range. This approach efficiently man-
ages power consumption by switching the operating rails
as needed according to the output swing requirements.
Additionally, multilevel output modulation is employed in to
draw the maximum possible power from the lower imped-
ance battery supply rail, VPVDD, rather than the higher
impedance charge-pump-generated rail VPVSS. This is
accomplished by generating PWM signals that swing
from ground to VPVDD or from ground to VPVSS at either
end of the bridge tied load (BTL) rather than continually
swinging from VPVDD to VPVSS. The signals are modu-
lated in such a way that VPVSS is used only as necessary
to generate low-end signal swing.
These combined operations ensure that power dissipa-
tion due to RDS(ON) loss and charge-pump impedance
is minimized, and that efficiency and output power is
maximized across the audio range. Class DG multilevel
operation is shown as Figure 1.
Figure 1. Class DG Multilevel Operation
MAX98307 fig01
400s/div
OUT+
5V/div
OUT-
5V/div
OUT+ - OUT-
10V/div
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| MAX98308EWC+T | 制造商:Maxim Integrated Products 功能描述:AMPLIFIER - Tape and Reel |
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