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| 型号： | MAX9707ETX+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/25页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 2.3W STER+1 36TQFN |
| 标准包装： | 2,500 |
| 类型： | D 类 |
| 输出类型： | 2-通道（立体声）带超低音器 |
| 在某负载时最大输出功率 x 通道数量： | 2.3W x 3 @ 4 欧姆 |
| 电源电压： | 4.5 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： | 36-TQFN 裸露焊盘（6x6） |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
MAX9706/MAX9707
3-Channel, 2.3W, Filterless Class D Amplifiers
with Active Crossover
14
______________________________________________________________________________________
Class D Speaker Amplifier
Spread-spectrum modulation and synchronizable switch-
ing frequency significantly reduce EMI emissions.
Comparators monitor the audio inputs and compare the
complementary input voltages to a sawtooth waveform.
The comparators trip when the input magnitude of the
sawtooth exceeds their corresponding input voltage. Both
comparators reset at a fixed time after the rising edge of
the second comparator trip point, generating a minimum-
width pulse (tON(MIN),100ns typ) at the output of the sec-
ond comparator (Figure 2). As the input voltage increases
or decreases, the duration of the pulse at one output
increases while the other output pulse duration remains
the same. This causes the net voltage across the speaker
(VOUT+ - VOUT-) to change. The minimum-width pulse
helps the device to achieve high levels of linearity.
Operating Modes
Fixed-Frequency (FFM) Mode
The MAX9706/MAX9707 feature two fixed-frequency
modes. Connect SYNC_IN to GND to select a 1.1MHz
switching frequency. Float SYNC to select a 1.34MHz
switching frequency. The frequency spectrum of the
MAX9706/MAX9707 consists of the fundamental
switching frequency and its associated harmonics (see
the Wideband Output Spectrum graph in the Typical
Operating Characteristics). Program the switching fre-
quency so the harmonics do not fall within a sensitive
frequency band (Table 1). Audio reproduction is not
affected by changing the switching frequency.
OUT+
OUT-
VIN-
VIN+
VOUT_+ - VOUT_-
tON(MIN)
tSW
Figure 2. Outputs with an Input Signal Applied (FFM Mode)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9708ECB+D | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO/2CH STEREO 42W/21W CLS-D 64TQFP EP - Rail/Tube |
| MAX9708ECB+TD | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO/2CH STEREO 42W/21W CLS-D 64TQFP EP - Tape and Reel |
| MAX9708ETN | 制造商:Maxim Integrated Products 功能描述:20W/40W FILTERLESS, SPREAD-SPECTRUM, MONO/STE - Rail/Tube |
| MAX9708ETN/V+TD | 制造商:Maxim Integrated Products 功能描述:20W/40W FILTERLESS, SPREAD SPECTRUM, MONO/STEREO, CLASS D AM - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC AMP AUDIO PWR 42W STER 56TQFN 制造商:Maxim Integrated Products 功能描述:Filterless Class D Amp Mono/Stereo |
| MAX9708ETN+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO/2CH STEREO 42W/21W CLS-D 56TQFN EP - Rail/Tube |
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