User Manual

6 ______________________________________________________________________________________
MAX98500
Boosted 2.2W Class D Amplifier
with Automatic Level Control
Typical Operating Characteristics (continued)
(V
BAT
= 3.6V, R
L
= ∞ between SPKP and SPKN, A
V
= +15.5dB, RKNEE = V
BAT
, 20Hz to 22kHz AC measurement bandwidth, unless
otherwise noted.)
Speaker
THD+N vs. FREQUENCY
MAX98500 toc06
FREQUENCY (kHz)
THD+N (%)
1010.1
0.01
0.1
1
10
0.001
0.01 100
Z
LOAD
= 8I + 68µH
P
OUT
= 1.4W
P
OUT
= 400mW
THD+N vs. OUTPUT POWER
MAX98500 toc07
OUTPUT POWER (W)
THD+N (%)
2.01.61.20.80.4
0.01
0.1
1
10
100
0.001
0 2.4
Z
LOAD
= 8I + 68µH
f = 6kHz
f = 1kHz
f = 100Hz
OUTPUT POWER vs. LOAD RESISTANCE
MAX98500 toc08
LOAD RESISTANCE (I)
OUTPUT POWER (W)
10010
1.5
1.0
0.5
2.0
2.5
3.0
0
1 1000
f
IN
= 1kHz
Z
SPRK
= LOAD + 68µF
THD+N = 10%
THD+N = 1%
OUTPUT POWER vs. BATTERY VOLTAGE
MAX98500 toc09
BATTERY VOLTAGE (V)
OUTPUT POWER (W)
5.04.54.03.53.0
0.5
1.0
1.5
2.0
2.5
3.0
0
2.5 5.5
f
IN
= 1kHz
Z
SPRK
= 8I + 68µH
THD+N = 1%
THD+N = 10%
GAIN vs. FREQUENCY
MAX98500 toc10
FREQUENCY (kHz)
GAIN (dB)
100101
-30
-20
-10
0
10
20
30
-40
0.1 1000
Z
LOAD
= 8I + 68µH
A
V
= 20dB
A
V
= 6dB
A
V
= 15.5dB