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参数资料
| 型号： | MAX13331GEE/V+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/15页 |
| 文件大小： | 0K |
| 描述： | IC AMP STEREO HEADPHONE 16-QSOP |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 系列： | DirectDrive® |
| 类型： | AB 类 |
| 输出类型： | 耳机，2-通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 135mW x 2 @ 32 欧姆 |
| 电源电压： | 4 V ~ 5.5 V |
| 特点： | 消除爆音，短路保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 16-QSOP |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
MAX13330/MAX13331
Automotive DirectDrive Headphone Amplifiers
with Output Protection and Diagnostics
______________________________________________________________________________________
11
Thermal-overload protection limits total power dissipa-
tion in the MAX13330/MAX13331. When the junction
temperature exceeds +145°C (typ), the thermal-protec-
tion circuitry disables the amplifier output stage. The
amplifiers are enabled once the junction temperature
cools by 5°C. This results in a pulsing output under
continuous thermal-overload conditions.
Output Power
The device has been specified for the worst-case sce-
nario, when both inputs are in-phase. Under this condi-
tion, the amplifiers simultaneously draw current from the
charge pump, leading to a proportional reduction in
VSS headroom. In typical stereo audio applications, the
left and right signals have differences in both magni-
tude and phase, subsequently leading to an increase in
the maximum attainable output power. Figure 4 shows
the two extreme cases for in- and out-of-phase. In reali-
ty, the available power lies between these extremes.
UVLO
The MAX13330/MAX13331 feature a UVLO function that
prevents the device from operating if the supply voltage
is less than 3.6V (typ). This feature ensures proper
operation during brownout conditions and prevents
deep battery discharge. Once the supply voltage
reaches the UVLO threshold, the charge-pump is
turned on and the amplifiers are powered.
Component Selection
Gain-Setting Resistors (MAX13331 Only)
The gain of the MAX13330 is internally set at -1.5V/V.
All gain-setting resistors are integrated into the device,
reducing external component count. The internally set
gain, in combination with DirectDrive, results in a head-
phone amplifier that requires only five tiny 1F capaci-
tors to complete the amplifier circuit: two for the
charge-pump, two for audio input coupling, and one for
power-supply bypassing (see the
Typical Application
Circuits). The gain of the MAX13331 amplifier is set
externally as shown in the
Typical Application Circuits,
the gain is:
Choose feedback resistor values of 10k
Ω. Values other
than 10k
Ω increase output offset voltage due to the
input bias current, which in turn, increases the amount
of DC current flow to the load.
Input Filtering
The input capacitor (CIN), in conjunction with the input
resistor (RIN), forms a highpass filter that removes the
DC bias from an incoming signal (see the
Typical
Application Circuits). The AC-coupling capacitor allows
the device to bias the signal to an optimum DC level.
Assuming zero source impedance, the -3dB point of
the highpass filter is given by:
Choose CIN so f-3dB is well below the lowest frequency
of interest. For the MAX13330, use the value of RIN as
given in the
Electrical Characteristics table. Setting
f-3dB too high affects the device’s low-frequency
response. Use capacitors whose dielectrics have low-
voltage coefficients, such as tantalum or aluminum
electrolytic. Capacitors with high-voltage coefficients,
such as ceramics, can result in increased distortion at
low frequencies.
Charge-Pump Capacitor Selection
Use capacitors with an ESR less than 100m
Ω for opti-
mum performance. Low-ESR ceramic capacitors mini-
mize the output resistance of the charge pump. For
best performance over the extended temperature
range, select capacitors with an X7R dielectric.
f
RC
Hz
dB
IN
=
××
3
1
2
π
()
A
R
VV
V
F
IN
=
(/ )
OUTPUT POWER vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
OUTPUT
POWER
(mW)
4.25
5.00
5.25
4.75
4.50
50
100
150
200
250
0
4.00
5.50
fIN = 1kHz
RL = 32
Ω
THD+N = 10%
INPUTS
IN PHASE
INPUTS 180
°
OUT OF PHASE
Figure 4. Output Power vs. Supply Voltage
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| MAX13330GEE/V+ | IC AMP STEREO HEADPHONE 16-QSOP |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX13335EEVKIT# | 功能描述:放大器 IC 开发工具 MAX13335E Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX13335EEVKIT+ | 功能描述:放大器 IC 开发工具 MAX13335E Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX13335EGEE/V+ | 功能描述:音频放大器 Differential Audio Input Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX13335EGEE/V+T | 功能描述:音频放大器 Differential Audio Input Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX13336EGEE/V+ | 功能描述:音频放大器 Differential Audio Input Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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