参数资料
型号: MAX9737ETG+
厂商: Maxim Integrated Products
文件页数: 2/13页
文件大小: 0K
描述: IC AMP AUDIO 13W MONO D 24TQFN
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: 13W x 1 @ 4 欧姆
电源电压: 8 V ~ 28 V
特点: 消除爆音,静音,短路保护和热保护,关机
安装类型: 表面贴装
供应商设备封装: 24-TQFN-EP(4x4)
封装/外壳: 24-WFQFN 裸露焊盘
包装: 管件
MAX9737
Mono 7W Class D Amplifier
10
______________________________________________________________________________________
OUT-
OUT+
IN
BIAS
COM
CONTROL
POWER
STAGE
SHDN
PVDD
CHOLD
REGULATOR
CHARGE
PUMP
C1P
C1N
PRE
9
5
3, 10, 11
8
7
12
13, 14
16
15
1, 17, 18
19, 20
23, 24
21, 22
PGND
8V TO 28V
2
AGND
MUTE
4
PRECHARGE
PC
AUDIO
INPUT
6
C1
0.1
μF
REG
C2
1
μF
1
μF
1
μF
100
μF
1
μF
RFB
20k
Ω
RIN
20k
Ω
CCOM
1
μF
CIN
0.47
μF
CREG
1
μF
MAX9737
VS
SHDN
LOGIC INPUT
VS
Typical Application Circuit
Supply Bypassing, Layout, and Grounding
Proper layout and grounding are essential for optimum
performance. Use wide traces for the power-supply
inputs and amplifier outputs to minimize losses due to
parasitic trace resistance. Proper grounding improves
audio performance, minimizes crosstalk between chan-
nels, and prevents switching noise from coupling into
the audio signal. Connect PGND and AGND together at
a single point on the PCB. Route all traces that carry
switching transients away from AGND and the
traces/components in the audio signal path.
Bypass PVDD with two 1F capacitors to PGND. Place
the bypass capacitors as close as possible to the
MAX9737. Place a 100F capacitor between PVDD and
PGND. Bypass VS,VCOM, and VREG with a 1F capacitor
to AGND.
Use wide, low-resistance output traces. Current drawn
from the outputs increases as load impedance
decreases. High-output trace resistance decreases the
power delivered to the load. The MAX9737 TQFN pack-
age features an exposed thermal pad on its underside.
This pad lowers the package’s thermal resistance by
providing a heat conduction path from the die to the
PCB. Connect the exposed thermal pad to PGND by
using a large pad and multiple vias to the PGND plane.
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