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參數(shù)資料
| 型號(hào)： | MAX4410EUD+ |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 4/20頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO .08W STER 14TSSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 96 |
| 系列： | DirectDrive® |
| 類型： | AB 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： | 80mW x 2 @ 16 歐姆 |
| 電源電壓： | 1.8 V ~ 3.6 V |
| 特點(diǎn)： | 消除爆音，短路保護(hù)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： | 14-TSSOP |
| 封裝/外殼： | 14-TSSOP（0.173"，4.40mm 寬） |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁(yè)面： | 1390 (CN2011-ZH PDF) |
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MAX4410
80mW, DirectDrive Stereo Headphone Driver
with Shutdown
12
______________________________________________________________________________________
Detailed Description
The MAX4410 stereo headphone driver features Maxim’s
DirectDrive architecture, eliminating the large output-
coupling capacitors required by traditional single-supply
headphone drivers. The device consists of two 80mW
Class AB headphone drivers, undervoltage lockout
(UVLO)/shutdown control, charge-pump, and compre-
hensive click-and-pop suppression circuitry (see Typical
Application Circuit). The charge pump inverts the posi-
tive supply (PVDD), creating a negative supply (PVSS).
The headphone drivers operate from these bipolar sup-
plies with their outputs biased about GND (Figure 1). The
drivers have almost twice the supply range compared to
other 3V single-supply drivers, increasing the available
output power. The benefit of this GND bias is that the dri-
ver outputs do not have a DC component typically
VDD/2. Thus, the large DC-blocking capacitors are
unnecessary, improving frequency response while con-
serving board space and system cost.
Each channel has independent left/right, active-low
shutdown controls, making it possible to optimize
power savings in mixed-mode, mono/stereo operation.
The device features an undervoltage lockout that pre-
vents operation from an insufficient power supply and
click-and-pop suppression that eliminates audible tran-
sients on startup and shutdown. Additionally, the
MAX4410 features thermal overload and short-circuit
protection and can withstand
±8kV ESD strikes on the
output pins.
DirectDrive
Traditional single-supply headphone drivers have their
outputs biased about a nominal DC voltage (typically
half the supply) for maximum dynamic range. Large
coupling capacitors are needed to block this DC bias
from the headphone. Without these capacitors, a signif-
icant amount of DC current flows to the headphone,
resulting in unnecessary power dissipation and possi-
ble damage to both headphone and headphone driver.
Maxim’s DirectDrive architecture uses a charge pump
to create an internal negative supply voltage. This
allows the outputs of the MAX4410 to be biased about
GND, almost doubling dynamic range while operating
from a single supply. With no DC component, there is
no need for the large DC-blocking capacitors. Instead
of two large (220F, typ) tantalum capacitors, the
MAX4410 charge pump requires two small ceramic
capacitors, conserving board space, reducing cost,
and improving the frequency response of the head-
phone driver. See the Output Power vs. Charge-Pump
Capacitance and Load Resistance graph in the Typical
Operating Characteristics for details of the possible
capacitor sizes. There is a low DC voltage on the driver
outputs due to amplifier offset. However, the offset of
the MAX4410 is typically 0.5mV, which, when com-
bined with a 32
Ω load, results in less than 16A of DC
current flow to the headphones.
Previous attempts to eliminate the output-coupling capac-
itors involved biasing the headphone return (sleeve) to
the DC-bias voltage of the headphone amplifiers. This
method raises some issues:
1) When combining a microphone and headphone on
a single connector, the microphone bias scheme
typically requires a 0V reference.
2) The sleeve is typically grounded to the chassis.
Using this biasing approach, the sleeve must be
isolated from system ground, complicating product
design.
3) During an ESD strike, the driver’s ESD structures
are the only path to system ground. Thus, the driver
must be able to withstand the full ESD strike.
VDD/2
VDD
GND
+VDD
-VDD
GND
VOUT
CONVENTIONAL DRIVER-BIASING SCHEME
DirectDrive BIASING SCHEME
Figure 1. Traditional Driver Output Waveform vs. MAX4410
Output Waveform
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4410EUD+ | 功能描述:音頻放大器 80mW DirectDrive Stereo Headphone Amp 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 |
| MAX4410EUD+T | 功能描述:音頻放大器 80mW DirectDrive Stereo Headphone Amp 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 |
| MAX4410EUD-T | 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 |
| MAX4410EVKIT | 功能描述:音頻 IC 開發(fā)工具 MAX4410 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 |
| MAX4411BEBE | 制造商:Maxim Integrated Products 功能描述:80MW 2V/V FIXED GAIN DIRECTDRIVE HP - Rail/Tube |
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