參數(shù)資料
型號(hào)： MAX9796EBX+TG45
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 8/28頁(yè)
文件大?。?/td> 0K
描述： IC AMP AUDIO 2.3W MONO D 36UCSP
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： D 類
輸出類型： 1-通道（單聲道），帶立體聲耳機(jī)
在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量： 2.3W x 1 @ 4 歐姆
電源電壓： 2.7 V ~ 5.5 V
特點(diǎn)： 消除爆音，差分輸入，I²C，靜音，短路和熱保護(hù)，關(guān)機(jī)，音量控制
安裝類型： 表面貼裝
供應(yīng)商設(shè)備封裝： 36-UCSP
封裝/外殼： 36-WFBGA，CSBGA
包裝： 帶卷 (TR)
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
16
______________________________________________________________________________________
Filterless Modulation/Common-Mode Idle
The MAX9796 uses Maxim’s unique modulation scheme
that eliminates the LC filter required by traditional Class
D amplifiers, improving efficiency, reducing component
count, conserving board space and system cost.
Conventional Class D amplifiers output a 50% duty-cycle
square wave when no signal is present. With no filter, the
square wave appears across the load as a DC voltage,
resulting in finite load current, increasing power con-
sumption, especially when idling. When no signal is pre-
sent at the input of the MAX9796, the outputs switch as
shown in Figure 4. Because the MAX9796 drives the
speaker differentially, the two outputs cancel each other,
resulting in no net idle mode voltage across the speaker,
minimizing power consumption.
DirectDrive
Traditional single-supply headphone amplifiers have
outputs biased at a nominal DC voltage (typically half
the supply) for maximum dynamic range. Large cou-
pling capacitors are needed to block this DC bias from
the headphone. Without these capacitors, a significant
amount of DC current flows to the headphone, resulting
in unnecessary power dissipation and possible dam-
age to both headphone and headphone amplifier.
Maxim’s DirectDrive architecture uses a charge
pump to create an internal negative supply voltage.
This allows the headphone outputs of the MAX9796 to
be biased at GND, almost doubling dynamic range
while operating from a single supply. With no DC
component, there is no need for the large DC-block-
ing capacitors. Instead of two large (220F, typ) tan-
talum capacitors, the MAX9796 charge pump
requires two small ceramic capacitors, conserving
board space, reducing cost, and improving the fre-
quency response of the headphone amplifier. See the
Output Power vs. Load Resistance and Charge-Pump
Capacitor Size graph in the
Typical Operating
Characteristics for details of the possible capacitor
sizes. There is a low DC voltage on the driver outputs
FREQUENCY (MHz)
AMPLITUDE
(dB
μ
V/m)
40
30
60
80
100
120
140
160
180
200
220
240
260
280
300
35
30
25
20
15
10
5
EN55022B LIMIT
Figure 3. EMI with 76mm of Speaker Cable
VIN = 0V
OUT-
OUT+
VOUT+ - VOUT- = 0V
Figure 4. Outputs with No Input Signal
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX9796EVKIT 制造商:Maxim Integrated Products 功能描述:2.3W HIGH-POWER CLASS D AUDIO SUBS - Rail/Tube
MAX9796EVKIT+ 制造商:Maxim Integrated Products 功能描述:MAX9796 EVAL KIT - Boxed Product (Development Kits)
MAX98088EVKIT# 功能描述:音頻 IC 開發(fā)工具 MAX98088 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
MAX98088EVKIT+ 功能描述:音頻 IC 開發(fā)工具 MAX98088 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
MAX98088EWY+T 功能描述:接口—CODEC Dual I2S Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
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