MAX4295 Maxim, MAX4295 Datasheet - Page 9

• Manufacturer Part Number: MAX4295
• Description: Mono/Stereo 2W Switch-Mode (Class-D) Audio Power Amplifiers
• Manufacturer: Maxim

(V
CC
100
90
80
70
60
50
40
30
20
10
10
20
18
16
14
12
10
0
8
6
4
2
0
8
6
4
2
0
= PV
SUPPLY CURRENT vs. SUPPLY VOLTAGE
0
SUPPLY CURRENT vs. SUPPLY VOLTAGE
0
0
A: f
B: f
C: f
D: f
A: f
B: f
C: f
D: f
500kHz
CC
vs. OUTPUT POWER (f
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
125kHz
0.1
1
= 125kHz
= 250kHz
1
= 125kHz
= 250kHz
= 500kHz
= 1MHz
= 500kHz
= 1MHz
= +3V, input amplifier gain = -1, SHDN = V
MAX4297 EFFICIENCY
250kHz
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
0.2
2
2
MAX4295
MAX4297
_______________________________________________________________________________________
0.3
1MHz
3
3
0.4
IN
4
Mono/Stereo 2W Switch-Mode (Class-D)
= 1kHz)
4
V
R
CC
L
= 4Ω
0.5
= +3V
D
5
5
C
B
C
A
A
D
B
0.6
100
Typical Operating Characteristics (continued)
90
80
70
60
50
40
30
20
10
8
7
6
5
4
3
2
1
0
0
7
6
5
4
3
2
1
0
-40
-40
0
SUPPLY CURRENT vs. TEMPERATURE
MAX4297
V
MAX4297
V
MAX4297
V
MAX4297
V
CC
CC
CC
CC
vs. OUTPUT POWER (f
MAX4297 SHUTDOWN SUPPLY
= +5V
CC
= +5V
= +3V
= +3V
CURRENT vs. TEMPERATURE
-15
-15
MAX4297 EFFICIENCY
0.05
, T
250kHz
125kHz
OUTPUT POWER (W)
TEMPERATURE (°C)
A
TEMPERATURE (°C)
= +25°C, unless otherwise noted.)
10
MAX4297
10
0.10
500kHz
35
35
1MHz
IN
Audio Power Amplifiers
MAX4295
V
= 1kHz)
0.15
CC
V
R
MAX4295
V
MAX4295
V
MAX4295
V
CC
L
60
CC
CC
60
CC
= +3V
= 32Ω
= +3V
= +3V
= +5V
= +5V
0.20
85
85
-0.005
-0.015
-0.025
0.015
0.005
-0.01
-0.02
SHDN
V
0.01
100
OUT
90
80
70
60
50
40
30
20
10
0
0
2.5
0
OSCILLATOR FREQUENCY DEVIATION
vs. OUTPUT POWER (f
0.1
3.0
125kHz
250kHz
MAX4297 EFFICIENCY
START-UP/SHUTDOWN
vs. SUPPLY VOLTAGE
1MHz
500kHz
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
0.2
3.5
125kHz
250kHz
WAVEFORM
1MHz
500kHz
400µs/div
0.3
4.0
R
f
f
C
OSC
IN
L
SS
= 4Ω
= 10kHz
0.4
4.5
= 560pF
= 250kHz
IN
= 1kHz)
V
R
MAX4295/7 toc54
CC
L
0.5
5.0
= 8Ω
= +3V
0.6
5.5
9
4V/div
2.5V/div