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參數(shù)資料
| 型號： | MAX9770ETI+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 3/22頁 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 1.2W MONO D 28TQFN |
| 標(biāo)準(zhǔn)包裝： | 60 |
| 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： | 1.2W x 1 @ 8 歐姆; 80mW x 2 @ 16 歐姆 |
| 電源電壓： | 2.5 V ~ 5.5 V |
| 特點： | 消除爆音，輸入多路復(fù)用器，靜音，短路和熱保護，關(guān)機 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 28-TQFN-EP（5x5） |
| 封裝/外殼： | 28-WFQFN 裸露焊盤 |
| 包裝： | 管件 |
MAX9770
1.2W, Low-EMI, Filterless, Mono Class D Amplifier
with Stereo DirectDrive Headphone Amplifiers
______________________________________________________________________________________
11
OUT+
OUT-
VIN-
VIN+
VOUT+ - VOUT-
tON(MIN)
tSW
Figure 1. MAX9770 Outputs with an Input Signal Applied
Detailed Description
The MAX9770 combines a mono 1.2W Class D speaker
amplifiers and stereo 80mW DirectDrive headphone
amplifiers with integrated headphone sensing and
comprehensive click-and-pop suppression. A
mixer/multiplexer allows for selection and mixing
between two stereo input sources and a single mono
source. The MAX9770 features PSRR as high as 85dB,
THD as low as 0.015%, industry-leading click-and-pop
suppression, and a low-power shutdown mode.
Class D Speaker Amplifier
The MAX9770 Class D amplifier features true filterless,
low-EMI, switch-mode architecture that provides Class
AB-like performance with Class D efficiency.
Comparators monitor the MAX9770 input and compare
the input voltage to a sawtooth waveform. The com-
parators trip when the input magnitude of the sawtooth
exceeds the corresponding input voltage. The com-
parator resets at a fixed time after the rising edge of the
second comparator trip point, generating a minimum-
width pulse tON(MIN) at the output of the second com-
parator (Figure 1). As the input voltage increases or
decreases, the duration of the pulse at one output
increases (the first comparator trip point) while the
other output pulse duration remains at tON(MIN). This
causes the net voltage across the speaker (VOUT+ -
VOUT-) to change.
SYNC INPUT
MODE
GND
FFPWM with fS = 1100kHz
Unconnected
FFPWM with fS = 1450kHz
VDD
SSPWM with fS = 1220kHz
±120kHz
Clocked
FFPWM with fS = external clock frequency
Table 1. Operating Modes
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9770ETI+ | 功能描述:音頻放大器 1.2W Low-EMI Class D Amplifier 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 |
| MAX9770ETI+T | 功能描述:音頻放大器 1.2W Low-EMI Class D Amplifier 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 |
| MAX9770EUI | 制造商:Rochester Electronics LLC 功能描述: |
| MAX9770EUI+ | 功能描述:音頻放大器 1.2W Low-EMI Class D Amplifier 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 |
| MAX9770EUI+T | 功能描述:音頻放大器 1.2W Low-EMI Class D Amplifier 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 |
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