MAX9742 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
生产厂家
MAX9742 Datasheet PDF : 36 Pages
| |||
Single-/Dual-Supply, Stereo 16W,
Class D Amplifier with Differential Inputs
Typical Operating Characteristics (continued)
(24V single-supply mode, ±15V dual-supply mode, both channels driven in phase, THD+N measurement bandwidth = 22Hz to
22kHz, TA = +25°C, unless otherwise noted. See Figure 1 for test circuits, see Typical Application Circuits/Functional Diagrams for
test circuit component values.)
VSHDN
2V/div
ENTERING SHUTDOWN
MAX9742 toc44
DUAL SUPPLY
RL = 8Ω
EXITING SHUTDOWN
MAX9742 toc45
VSHDN
2V/div
SINGLE SUPPLY
RL = 8Ω
VSHDN
2V/div
ENTERING SHUTDOWN
(SINGLE SUPPLY)
MAX9742 toc46
SINGLE SUPPLY
RL = 8Ω
VOUT_
20V/div
FILTERED
VOUT_
5V/div
10ms/div
VOUT_
10V/div
FILTERED
VOUT_
5V/div
20ms/div
VOUT_
10V/div
FILTERED
VOUT_
5V/div
10ms/div
CASE TEMPERATURE
vs. OUTPUT POWER
50
40
30
20
10
0
0
SINGLE SUPPLY
VDD = 24V
RL = 8Ω
4-LAYER PCB
2 4 6 8 10 12
OUTPUT POWER PER CHANNEL (W)
CASE TEMPERATURE
vs. OUTPUT POWER
120
SINGLE SUPPLY
100
VDD = 24V
RL = 4Ω
4-LAYER PCB
80
60
OUTPUT WAVEFORM
MAX9742 toc49
SINGLE SUPPLY, VDD = 24V
INPUTS AC GROUNDED
VOUT
10V/div
40
VOUTR
10V/div
20
0
0
5
10
15
20
OUTPUT POWER PER CHANNEL (W)
1µs/div
EMI AMPLITUDE vs. FREQUENCY
40
SINGLE SUPPLY
MAX9742 toc50
35 RL = 8Ω, POUT = 1.25W
SPEAKER CABLE
LENTH = 1m
30
EN55022B LIMIT
9.4dBµV/m BELOW LIMIT
25
12.8dBµV/m
20
18.1dBµV/m
BELOW LIMIT
BELOW LIMIT
15
10
5
30
100
1000
FREQUENCY (MHz)
EMI AMPLITUDE vs. FREQUENCY
40
SINGLE SUPPLY
MAX9742 toc51
EN55022B LIMIT
35
RL = 4Ω, POUT_ = 1.25W
SPEAKER CABLE
LENTH = 1m
30
11.3dBµV/m
25
BELOW LIMIT
7.8dBµV/m
BELOW LIMIT
5.8dBµV/m
BELOW LIMIT
20 7dBµV/m
BELOW
15 LIMIT
10
5
30
3.6dBµV/m
BELOW LIMIT
100
1000
FREQUENCY (MHz)
______________________________________________________________________________________ 11
Share Link: 