- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2088 > MAX4295EEE+ (Maxim Integrated Products)IC AMP AUDIO PWR 2W MONO 16QSOP PDF資料下載
參數(shù)資料
| 型號： | MAX4295EEE+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 15/15頁 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 2W MONO 16QSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 100 |
| 類型： | D 類 |
| 輸出類型： | 1-通道（單聲道） |
| 在某負載時最大輸出功率 x 通道數(shù)量： | 2W x 1 @ 4 歐姆 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 特點： | 消除爆音，短路保護和熱保護，關(guān)閉 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 16-QSOP |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 包裝： | 管件 |
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
相關(guān)PDF資料 |
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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4295EEE+ | 功能描述:音頻放大器 Mono 2W Switch Mode (Class D) 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 |
| MAX4295EEE+T | 功能描述:音頻放大器 Mono 2W Switch Mode (Class D) 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 |
| MAX4295EEE-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 |
| MAX4295ESE | 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 |
| MAX4295ESE+ | 功能描述:音頻放大器 Mono 2W Switch Mode (Class D) 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。