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| 型号： | MAX9759ETE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/20页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 3.2W D 16TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 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： | 4.3W x 1 @ 3 欧姆 |
| 电源电压： | 3 V ~ 5.5 V |
| 特点： | 消除爆音，差分输入，静音，短路和热保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 16-TQFN-EP（4x4） |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1392 (CN2011-ZH PDF) |
Detailed Description
Operating Modes
The MAX9759 filterless, Class D audio power amplifier
features several improvements to switch-mode amplifier
technology. The MAX9759 offers Class AB performance
with Class D efficiency, while occupying minimal board
space. A unique modulation scheme, synchronizable
switching frequency, and SSM mode create a compact,
flexible, low-noise, efficient audio power amplifier. The
differential input architecture reduces common-mode
noise pickup, and can be used without input-coupling
capacitors. The device can also be configured as a sin-
gle-ended input amplifier.
Comparators monitor the MAX9759 inputs and com-
pare the complementary input voltages to the sawtooth
waveform. The comparators trip when the input magni-
tude 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, gener-
ating a minimum-width pulse tON(MIN) at the output of
the second comparator (Figure 1). As the input voltage
increases or decreases, the duration of the pulse at
one output increases (the first comparator to trip) while
the other output pulse duration remains at tON(MIN).
This causes the net voltage across the speaker (VOUT+
- VOUT-) to change.
Fixed-Frequency Modulation (FFM) Mode
The MAX9759 features two FFM modes. The FFM
modes are selected by setting SYNC = GND for a
1.1MHz switching frequency, and SYNC = FLOAT for a
1.5MHz switching frequency. In FFM mode, the fre-
quency spectrum of the Class D output consists of the
fundamental switching frequency and its associated
harmonics (see the Wideband Output Spectrum (FFM
Mode) graph in the Typical Operating Characteristics).
The MAX9759 allows the switching frequency to be
changed, should the frequency of one or more of the
harmonics fall in a sensitive band. This can be done at
any time and does not affect audio reproduction.
MAX9759
3.2W, High-Efficiency, Low-EMI,
Filterless, Class D Audio Amplifier
10
______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1VDD
Analog Power Supply. Bypass to GND with a 1F ceramic capacitor.
2
IN+
Noninverting Audio Input
3
IN-
Inverting Audio Input
4
GND
Analog Ground
5
SHDN
Active-Low Shutdown Input. Drive SHDN low to shut down the MAX9759. Connect to VDD for normal
operation.
6, 14
PGND
Power Ground
7
SYNC
Frequency Select and External Clock Input:
SYNC = GND: Fixed-frequency mode with fS = 1100kHz.
SYNC = FLOAT: Fixed-frequency mode with fS = 1500kHz.
SYNC = VDD: Spread-spectrum mode with fS = 1200kHz
±70kHz.
SYNC = Clocked: Fixed-frequency mode with fS = external clock frequency.
8
MUTE
Active-Low Mute Function. Drive MUTE low to disable the H-bridge outputs. Connect to VDD for
normal operation.
9, 12
PVDD
H-Bridge Power Supply. Bypass to PGND with a 10F ceramic capacitor.
10
OUT-
Negative Speaker Output
11
OUT+
Positive Speaker Output
13
SYNC_OUT
Internal Clock Output. Connect SYNC_OUT to the clock input of cascaded Maxim Class D
amplifiers. Float SYNC_OUT if unused.
15
G2
Gain Control 2 (See Table 2)
16
G1
Gain Control 1 (See Table 2)
EP
Exposed Paddle. Can be left floating or tied to GND. For optimum thermal performance, connect EP
to GND.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9759ETE+ | 功能描述:音频放大器 3.2W Low-EMI Class D Amplifier 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 |
| MAX9759ETE+T | 功能描述:音频放大器 3.2W Low-EMI Class D Amplifier 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 |
| MAX9759EUE+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX9759EUE+T | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO 4.3W CLS-D 16TSSOP - Tape and Reel |
| MAX9759EVKIT | 功能描述:音频放大器 Evaluation Kit for the MAX9759 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 |
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