Datasheet

MAX4295
Mono, 2W, Switch-Mode (Class D)
Audio Power Amplifier
6 _______________________________________________________________________________________
0
30
20
10
40
50
60
70
80
90
100
0 1.00.5 1.5 2.0
EFFICIENCY
vs. OUTPUT POWER (f
IN
= 1kHz)
MAX4295 toc19
OUTPUT POWER (W)
EFFICIENCY (%)
2.5
V
CC
= +5V
R
L
= 4Ω
1MHz
125kHz
250kHz
500kHz
0
30
20
10
40
50
60
70
80
90
100
0 0.60.3 0.9 1.2 1.5 1.8
EFFICIENCY
vs. OUTPUT POWER (f
IN
= 1kHz)
MAX4295 toc20
OUTPUT POWER (W)
EFFICIENCY (%)
V
CC
= +5V
R
L
= 8Ω
1MHz
125kHz
250kHz
500kHz
0
30
20
10
40
50
60
70
80
90
100
0 0.20.1 0.3 0.4
EFFICIENCY
vs. OUTPUT POWER (f
IN
= 1kHz)
MAX4295 toc21
OUTPUT POWER (W)
EFFICIENCY (%)
0.5
V
CC
= +5V
R
L
= 32Ω
1MHz
125kHz
250kHz
500kHz
0
30
20
10
40
50
60
70
80
90
100
0 0.40.2 0.6 0.8
EFFICIENCY
vs. OUTPUT POWER (f
IN
= 1kHz)
MAX4295 toc22
OUTPUT POWER (W)
EFFICIENCY (%)
V
CC
= +3V
R
L
= 4Ω
1MHz
125kHz
250kHz
500kHz
0
30
20
10
40
50
60
70
80
90
100
0 0.40.2 0.6 0.8
EFFICIENCY
vs. OUTPUT POWER (f
IN
= 1kHz)
MAX4295 toc23
OUTPUT POWER (W)
EFFICIENCY (%)
V
CC
= +3V
R
L
= 8Ω
1MHz
125kHz
250kHz
500kHz
0
30
20
10
40
50
60
70
80
90
100
0 0.100.05 0.15 0.20
EFFICIENCY
vs. OUTPUT POWER (f
IN
= 1kHz)
MAX4295 toc24
OUTPUT POWER (W)
EFFICIENCY (%)
V
CC
= +3V
R
L
= 32Ω
1MHz
125kHz
250kHz
500kHz
0
2
6
4
8
0
2
1345
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4295 toc25
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
B
A
C
10
D
A: f
OSC
= 125kHz
B: f
OSC
= 250kHz
C: f
OSC
= 500kHz
D: f
OSC
= 1MHz
Typical Operating Characteristics (continued)
(V
CC
= PV
CC
= +3V, input amplifier gain = -1, SHDN = V
CC
, T
A
= +25°C, unless otherwise noted.)