- 您现在的位置：买卖IC网 > PDF目录10339 > MAX4295EEE+T (Maxim Integrated Products)IC AMP AUDIO PWR 2W MONO 16QSOP PDF资料下载
参数资料
| 型号： | MAX4295EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/15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： | 2,500 |
| 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： | 带卷 (TR) |
MAX4295
Mono, 2W, Switch-Mode (Class D)
Audio Power Amplifier
_______________________________________________________________________________________
9
FS1 and FS2 program the oscillator to a frequency of
125kHz, 250kHz, 500kHz, and 1MHz. The sawtooth
oscillator swings between GND and 0.6 VCC. The
input signal is typically AC-coupled to the internal input
op amp, whose gain can be controlled through exter-
nal feedback components. The common-mode voltage
of the input amplifier is 0.3 VCC and is internally gen-
erated from the same resistive divider used to generate
the 0.6 VCC reference for the PWM oscillator.
Current Limit
A current-limiting circuit in the H-bridge monitors the
current in the H-bridge transistors and disables the H-
bridge if the current in any of the H-bridge transistors
exceeds 1A. The H-bridge is enabled after a period of
100s. A continuous short circuit at the output results
in a pulsating output.
Thermal Overload Protection
Thermal overload protection limits total power dissipa-
tion in the MAX4295. When the junction temperature
exceeds +145°C, the thermal detection disables the H-
bridge transistors. The H-bridge transistors are
enabled after the IC’s junction temperature cools by
10°C. This results in a pulsating output under continu-
ous thermal overload conditions. Junction temperature
does not exceed the thermal overload trip point in nor-
mal operation, but only in the event of fault conditions,
such as when the H-bridge outputs are short circuited.
Undervoltage Lockout
At low supply voltages, the MOSFETs in the H-bridge
may have inadequate gate drive thus dissipating
excessive power. The undervoltage lockout circuit pre-
vents the device from operating at supply voltages
below +2.2V.
Low-Power Shutdown Mode
The MAX4295 has a shutdown mode that reduces
power consumption and extends battery life. Driving
SHDN low disables the H-bridge, turns off the circuit,
and places the MAX4295 in a low-power shutdown
mode. Connect SHDN to VCC for normal operation.
Applications Information
Component Selection
Gain Setting
External feedback components set the gain of the
MAX4295. Resistors RF and RIN set the gain of the
input amplifier to -(RF/RIN). The amplifier’s noninverting
input is connected to the internally generated 0.3 VCC
(VCM) that sets the amplifier’s common-mode voltage.
The amplifier’s input bias current is low, ±50pA, and
does not affect the choice of feedback resistors. The
noise in the circuit increases as the value of RF
increases.
The optimum impedance seen by the inverting input is
between 5k
and 20k. The effective impedance is
given by (RF RIN)/(RF + RIN). For values of RF >
50k
, a small capacitor (≈3pF) connected across RF
compensates for the pole formed by the input capaci-
tance and the effective resistance at the inverting input.
VIN
VRAMP
+5V
VOUT
0V
Figure 2. PWM Waveforms
相关PDF资料 |
PDF描述 |
|---|---|
| MS27497E14A5P | CONN RCPT 5POS WALL MNT W/PINS |
| D38999/20JJ61PNLC | CONN HSG RCPT 61POS WALL MT PINS |
| LTC1197IMS8#TR | IC ADC 10BIT 500KHZ SHTDWN 8MSOP |
| LTC2305IMS#TRPBF | IC ADC 12-BIT 2CHN 12-MSOP |
| LTC2305IDE#TRPBF | IC ADC 12-BIT 2CHN 12-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAX4295ESE+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 |
| MAX4295ESE-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 |
| MAX4295EVKIT | 制造商:Maxim Integrated Products 功能描述:EVALUATION KIT FOR THE MAX4295 - Bulk |
发布紧急采购，3分钟左右您将得到回复。