- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄10340 > MAX9776EBX+TG45 (Maxim Integrated Products)IC AMP AUDIO PWR 1.5W MONO 36WLP PDF資料下載
參數(shù)資料
| 型號： | MAX9776EBX+TG45 |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 16/38頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO PWR 1.5W MONO 36WLP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 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 |
| 在某負載時最大輸出功率 x 通道數(shù)量： | 1.5W x 1 @ 4 歐姆; 60mW x 2 @ 16 歐姆 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 特點： | 消除爆音，差分輸入，I²C，靜音，短路和熱保護，關機，音量控制 |
| 安裝類型： | 表面貼裝 |
| 供應商設備封裝： | 36-WLP |
| 封裝/外殼： | 36-UFBGA，WLCSP |
| 包裝： | 帶卷 (TR) |
| 配用： | MAX9776EVKIT+-ND - EVALUATION KIT FOR MAX9776 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁
Charge Pump
The MAX9775/MAX9776 feature a low-noise charge
pump. The switching frequency of the charge pump is
half the switching frequency of the Class D amplifier,
regardless of the operating mode. The nominal switch-
ing frequency is well beyond the audio range, and thus
does not interfere with the audio signals, resulting in an
SNR of 93dB. Although not typically required, addition-
al high-frequency noise attenuation can be achieved by
increasing the size of C2 (see the
Typical Application
Circuits). The charge pump is active in both speaker
and headphone modes.
3D Enhancement
The MAX9775 features a 3D stereo enhancement func-
tion, allowing the MAX9775 to widen the stereo sound field
and immerse the listener in a cleaner, richer sound experi-
ence. Note the MAX9776, mono Class D speaker amplifier
does not feature 3D stereo enhancement.
As stereo speaker applications become more compact,
the quality of stereophonic sound is jeopardized.
With Maxim’s 3D stereo enhancement, it is possible to
emulate stereo sound in situations where the speakers
must be positioned close together. As shown in Figure
6, wave interference can be used to cancel the left
channel in the vicinity of the listener’s right ear and vice
versa. This technique can yield an apparent separation
between the speakers that is a factor of four or greater
than the actual physical separation.
The external capacitors CL_L, CL_H, CR_L, and CR_H
set the starting and stopping range of the 3D effect.
CL_H and CR_H are for the lower limit (in the MAX9775
Typical Application Circuit, it is 1kHz), CR_L and CL_L
are for the higher limit (10kHz). The internal resistor is
typically 7k
Ω and the frequencies are calculated as:
where R = 7k
Ω and C = CR_H and CL_H.
where R = 7k
Ω and C = CR_L and CL_L.
For example, with CR_L = CL_L = 2.2nF and CR_H =
CL_H = 22nF, the 3D start frequency is 1kHz and the
3D stop frequency is 10kHz.
Enabling the 3D sound effect results in an apparent 6dB
gain because the internal left and right signals are mixed
together. This gain can be nulled by volume adjusting
the left and right signals. The volume control can be pro-
grammed through the I2C-compatible interface to com-
pensate for the extra 6dB increase in gain. For example,
3
1
2
D STOP
RC
_
=
π
3
1
2
D START
RC
_
=
π
MAX9775/MAX9776
2 x 1.5W, Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
______________________________________________________________________________________
23
VDD / 2
VDD
GND
+VDD
-VDD
GND
VOUT
CONVENTIONAL DRIVER-BIASING SCHEME
DirectDrive BIASING SCHEME
Figure 5. Traditional Amplifier Output vs. MAX9775/MAX9776
DirectDrive Output
+
d
QR
IL
IR
QL
RIGHT
LEFT
RIGHT
LEFT
LISTENER
Figure 6. MAX9775 3D Stereo Enhancement
相關PDF資料 |
PDF描述 |
|---|---|
| MS27508E18B11S | CONN RCPT 11POS BOX MNT W/SCKT |
| MS3106F16-10P | CONN PLUG 3POS STRAIGHT W/PINS |
| MAX13330GEE/V+T | IC AMP STEREO HEADPHONE 16-QSOP |
| LTC2480HDD#TRPBF | IC ADC DELTA SIGMA 16BIT 10DFN |
| MAX9789BETJ+T | IC AMP AUDIO 2W STER AB 32TQFN |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9776ETJ+ | 功能描述:音頻放大器 2 x 1.5W Stereo Class D Subsystem 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9776ETJ+T | 功能描述:音頻放大器 2 x 1.5W Stereo Class D Subsystem 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9776EVKIT+ | 功能描述:音頻 IC 開發(fā)工具 MAX9776 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX9777ETI+ | 功能描述:音頻放大器 Integrated Circuits (ICs) 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9777ETI+T | 功能描述:音頻放大器 Integrated Circuits (ICs) 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。