- 您现在的位置：买卖IC网 > PDF目录2088 > MAX4295EEE+ (Maxim Integrated Products)IC AMP AUDIO PWR 2W MONO 16QSOP PDF资料下载
参数资料
| 型号： | MAX4295EEE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/15页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 2W MONO 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | D 类 |
| 输出类型： | 1-通道（单声道） |
| 在某负载时最大输出功率 x 通道数量： | 2W x 1 @ 4 欧姆 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 特点： | 消除爆音，短路保护和热保护，关闭 |
| 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 |
MAX4295
Mono, 2W, Switch-Mode (Class D)
Audio Power Amplifier
______________________________________________________________________________________
11
Output Filter
An output filter is required to attenuate the PWM switch-
ing frequency. Without the filter, the ripple in the load
can substantially degrade efficiency and may cause
interference problems with other electronic equipment.
A Butterworth lowpass filter is chosen for its flat
passband and nice phase response, though other filter
implementations may also be used. Three examples
are presented below. The filter parameters for bal-
anced 2-pole (Figure 4b) and 4-pole (Figure 4d)
Butterworth filters are taken from Electronic Filter
Design Handbook by Arthur B. Williams, McGraw Hill,
Inc. These filter designs assume that the load is purely
resistive and load impedance is constant over frequen-
cy. Calculation of filter component values should
include the DC resistance of the inductors and take into
account the worst-case load scenario:
Single Ended 2-Pole Filter (Figure 4a)
C = 1 / (
√2 RL ωo), L = √2 RL / ωo
where
ωo = 2 π fo (fo = filter cutoff frequency);
choosing fo = 30kHz and RL = 4
, C = 0.937F, L =
30H.
A single-ended 2-pole filter uses the minimum number
of external components, but the load (speaker) sees
the large common-mode switching voltage, which can
increase power dissipation and cause EMI problems.
Balanced 2-Pole (Figure 4b):
A balanced 2-pole filter does not have the common-
mode swing problem of the single-ended filter.
C = 2 / (
√2 RL ωo), L = (√2 RL)/(2 ωo); choosing
fo = 30kHz and RL = 4
, C1a = C1b = 2.0F, L1a =
L1b = 15H.
A single capacitor connected across RL, with a value of
CL = 1/(
√2 RL ωo), can be used in place of C1a and
C1b. However, the configuration as shown gives an
improved rejection to common-mode signal compo-
nents of OUT+_ and OUT-_. If the single capacitor
scheme is used, additional capacitors (Ca and Cb) can
be added from each side of RL, providing a high-fre-
quency short to ground (Figure 4c). These capacitors
should be approximately 0.2 CL.
Balanced 4-Pole Filter (Figure 4d)
A balanced 4-pole filter is more effective in suppress-
ing the switching frequency and its harmonics.
For the 4-pole Butterworth filter, the normalized values
are: L1N = 1.5307, L2N = 1.0824, C1N = 1.5772, C2N =
0.3827.
The actual inductance and capacitance values for fO =
30kHz and a bridge-tied load of RL = 4
are given by:
L1 = (L1N RL ) / (2
ωo) = 16.24H, L2 = (L2N RL) /
(2
ωo) = 11.5H, C1 = C1N / (RL ωo) = 2.1F, C2a =
C2b = (2 C2N) / (RL
ωo) = 1.0F.
OUT+
OUT-
L
C
RL
Figure 4a. Single-Ended 2-Pole Filter
OUT+
OUT-
L1
C1a
RL
L2
C1b
Figure 4b. Balanced 2-Pole Filter
OUT+
OUT-
L1
Ca
RL
L2
Cb
CL
Figure 4c. Alternate Balanced 2-Pole Filter
OUT+
OUT-
L2a
C2a
RL
L2b
C2b
L1b
L1a
C1
Figure 4d. Balanced 4-Pole Filter
相关PDF资料 |
PDF描述 |
|---|---|
| MAX4299EWP+T | IC DVR/STEREO W/MIC/REG 20-SOIC |
| MAX4365ETA+T | IC AMP AUDIO PWR 1W MONO 8TDFN |
| MAX4368ETA+T | IC AMP AUDIO PWR .33W MONO 8TDFN |
| MAX4374HEUB+T | IC AMP CURRENT SENSE 10-UMAX |
| MAX4386EESD+T | IC OP AMP R-R SNGL 14-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4295EEE+ | 功能描述:音频放大器 Mono 2W Switch Mode (Class D) 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 |
| MAX4295EEE+T | 功能描述:音频放大器 Mono 2W Switch Mode (Class D) 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 |
| MAX4295EEE-T | 功能描述:音频放大器 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 |
| MAX4295ESE | 功能描述:音频放大器 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 |
| MAX4295ESE+ | 功能描述:音频放大器 Mono 2W Switch Mode (Class D) 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 |
发布紧急采购，3分钟左右您将得到回复。