Datasheet

_______________________________________________________________________________________ 5
MAX98502
Boosted 2.2W Class D Amplifier
with Automatic Level Control
Typical Operating Characteristics
(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.)
General
BATTERY CURRENT
vs. BATTERY VOLTAGE
MAX98502 toc01
SUPPLY VOLTAGE (V)
BATTERY CURRENT (mA)
5.04.54.03.53.0
1
2
3
4
5
6
7
0
2.5 5.5
INPUTS AC-COUPLED TO GND
SDSPK = SDBST = V
BAT
BATTERY CURRENT
vs. BATTERY VOLTAGE
MAX98502 toc03
BATTERY VOLTAGE (V)
BATTERY CURRENT (µA)
5.04.54.03.53.0
0.005
0.010
0.015
0.020
0.025
0.030
0.035
0.040
0
2.5 5.5
INPUTS AC-COUPLED TO GND
SDSPK = SDBST = AGND
EFFICIENCY vs. OUTPUT POWER
MAX98502 toc05
P
OUT
(W)
EFFICIENCY (%)
2.52.01.51.00.5
10
20
30
40
50
60
70
80
90
100
0
0 3.0
V
BAT
= 4.2V
V
BAT
= 3.6V
V
BAT
= 3.0V
Z
LOAD
= 8I + 68µF
f
IN
= 1kHz
BATTERY CURRENT
vs. BATTERY VOLTAGE
MAX98502 toc02
SUPPLY VOLTAGE (V)
BATTERY CURRENT (µA)
5.04.54.03.53.0
70
80
90
100
110
120
130
140
60
2.5 5.5
INPUTS AC-COUPLED TO GND
SDSPK = SDBST = V
BAT
TURN-ON RESPONSE
MAX98502 toc04
SPKR OUT
V
CCOUT
2V/div
2ms/div
SDBST
EFFICIENCY vs. OUTPUT POWER
MAX98502 toc06
P
OUT
(W)
4.0
3.52.5 3.01.0 1.5 2.00.50 4.5
EFFICIENCY (%)
10
20
30
40
50
60
70
80
90
100
0
V
BAT
= 4.2V
V
BAT
= 3.6V
V
BAT
= 3.0V
Z
LOAD
= 4I + 33µF
C
VCCOUT
= 22µF (0804)
f
IN
= 1kHz