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参数资料
| 型号： | MAX9717DETA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/21页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 1.4W STER 8TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | AB 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： | 1.4W x 1 @ 4 欧姆 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 特点： | 消除爆音，关机，热保护 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
Detailed Description
The MAX9716/MAX9717 are 1.3W BTL speaker ampli-
fiers. Both devices feature a low-power shutdown
mode, and industry-leading click-and-pop suppression.
The MAX9717 features a headphone sense input that
disables the slave BTL amplifier to drive the headphone
as a single-ended load. These devices consist of high
output-current audio amps configured as BTL ampli-
fiers (see
Functional Diagrams). The closed-loop gain
of the input op amp sets the single-ended gain of the
device. Two external gain resistors set the gain of the
MAX9716 and MAX9717A (see the
Gain-Setting
Resistor section). The MAX9717B/C/D feature internally
set gains of 6dB, 9dB, and 12dB, respectively.
The output of the first amplifier serves as the input of the
second amplifier, which is configured as an inverting
unity-gain follower. This results in two outputs, identical in
amplitude, but 180° out-of-phase.
BIAS
The MAX9716/MAX9717 operate from a single 2.7V to
5.5V supply and feature an internally generated, common-
mode bias voltage of VCC/2 referenced to ground. BIAS
provides both click-and-pop suppression and sets the DC
bias level for the audio outputs. The MAX9716 can be
configured as a single-ended or differential input. For sin-
gle-ended input, connect the noninverting input IN+ to
BIAS externally. The MAX9717 BIAS is internally connect-
ed to the amplifier noninverting input IN+.
The MAX9717 can only be used with a
single-ended input. Always bypass BIAS to ground with a
capacitor. Choose the value of the bypass capacitor as
described in the
BIAS Capacitor section. Do not connect
external loads to BIAS. Any load lowers the BIAS voltage,
affecting the overall performance of the device.
BTL/SE Control Input
The MAX9717 features a headphone sense input,
BTL/SE, that enables headphone jack sensing to con-
trol the power amplifier output configuration. Driving
BTL/SE low enables the slave amplifier (OUT-). Driving
BTL/SE high disables the slave amplifier.
Shutdown Mode
The MAX9716/MAX9717 feature a low-power shutdown
mode that reduces quiescent current consumption to
10nA. Entering shutdown disables the bias circuitry,
forces the amplifier outputs to GND through an internal
20k
resistor. Drive SHDN low to enter shutdown
mode; drive SHDN high for normal operation.
Click-and-Pop Suppression
The MAX9716/MAX9717 feature Maxim’s industry-leading
click-and-pop suppression circuitry. During startup, the
amplifier common-mode bias voltage ramps to the DC
bias. When entering shutdown, the amplifier outputs are
pulled to GND through an internal 20k
resistor. This
scheme minimizes the energy present in the audio band.
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio
Power Amplifiers
_______________________________________________________________________________________
9
Pin/Bump Description
PIN
BUMP
TDFN/MAX
UCSP
MAX9716
MAX9717
MAX9716
MAX9717
NAME
FUNCTION
1
C3
SHDN
Active-Low Shutdown
2
C1
BIAS
DC Bias Bypass Capacitor Connection. Bypass BIAS to ground with a
1F capacitor.
3
—
A3
—
IN+
Noninverting Input
4
A1
IN-
Inverting Input
5
A2
OUT+
Bridge Amplifier Positive Output
6
B3
VCC
Power Supply. Bypass VCC with a 1F capacitor to ground.
7
B1, B2
GND
Ground
8
C2
OUT-
Bridge Amplifier Negative Output. OUT- becomes high-impedance
when BTL/SE is driven high.
—3
—
A3
BTL/SE
BTL/Single-Ended Mode Input. Logic low sets the device in BTL mode.
Logic high sets the device in single-ended mode.
—
EP
Exposed Pad (TDFN and MAX Only). Connect EP to GND.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9717DEUA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9717DEUA+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH/SPKR 1CH MONO 1.4W/0.155W CLS-AB 8PIN UMAX EP - Rail/Tube |
| MAX9717DEUA+T | 制造商:Maxim Integrated Products 功能描述:- Tape and Reel |
| MAX9718AEBL | 制造商:Maxim Integrated Products 功能描述:LOW-COST MONO/STEREO 1.4W DIFFERE - Rail/Tube |
| MAX9718AEBL+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO 1.4W CLS-AB 9UCSP - Rail/Tube |
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