MAX4295 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX4295 Datasheet PDF : 18 Pages
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Mono/Stereo 2W Switch-Mode (Class-D)
Audio Power Amplifiers
Typical Operating Characteristics (continued)
(VCC = PVCC = +3V, input amplifier gain = -1, SHDN = VCC , TA = +25°C, unless otherwise noted.)
MAX4297 EFFICIENCY
vs. OUTPUT POWER (fIN = 1kHz)
100
90 500kHz
80
70
60
1MHz
50
40
250kHz
30
20
10
0
0
125kHz
VCC = +3V
RL = 4Ω
0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT POWER (W)
100
90
80
70
60
50
40
30
20
10
0
0
MAX4297 EFFICIENCY
vs. OUTPUT POWER (fIN = 1kHz)
250kHz
500kHz
125kHz
1MHz
VCC = +3V
RL = 32Ω
0.05
0.10
0.15
0.20
OUTPUT POWER (W)
100
90
80
70
60
50
40
30
20
10
0
0
MAX4297 EFFICIENCY
vs. OUTPUT POWER (fIN = 1kHz)
500kHz
1MHz
250kHz
125kHz
VCC = +3V
RL = 8Ω
0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT POWER (W)
MAX4295
SUPPLY CURRENT vs. SUPPLY VOLTAGE
10 A: fOSC = 125kHz
B: fOSC = 250kHz
D
8 C: fOSC = 500kHz
D: fOSC = 1MHz
6
C
4
B
2
A
0
0
1
2
3
4
5
SUPPLY VOLTAGE (V)
MAX4297
SUPPLY CURRENT vs. TEMPERATURE
7
6 MAX4297
VCC = +5V
5
4 MAX4297
VCC = +3V
3
MAX4295
VCC = +5V
2
1
0
-40
MAX4295
VCC = +3V
-15
10
35
60
85
TEMPERATURE (°C)
OSCILLATOR FREQUENCY DEVIATION
vs. SUPPLY VOLTAGE
0.015
0.01
0.005
125kHz
0
-0.005
-0.01
-0.015
250kHz
500kHz
-0.02
1MHz
-0.025
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
MAX4297
SUPPLY CURRENT vs. SUPPLY VOLTAGE
20
A: fOSC = 125kHz
18 B: fOSC = 250kHz
16 C: fOSC = 500kHz
D
D: fOSC = 1MHz
14
12
10
C
8
6
B
4
2
A
0
0
1
2
3
4
5
SUPPLY VOLTAGE (V)
MAX4297 SHUTDOWN SUPPLY
CURRENT vs. TEMPERATURE
8
7
6 MAX4297
VCC = +5V
5
4
MAX4297
3 VCC = +3V
MAX4295
VCC = +5V
2
1
0
-40
MAX4295
VCC = +3V
-15
10
35
60
85
TEMPERATURE (°C)
VOUT
SHDN
START-UP/SHUTDOWN
WAVEFORM
MAX4295/7 toc54
4V/div
RL = 4Ω
fOSC = 250kHz
fIN = 10kHz
CSS = 560pF
400µs/div
2.5V/div
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