Rainbow Electronics MAX98500 - Manual (Page 5)

_______________________________________________________________________________________ 5
MAX98500
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
MAX98500 toc01
BATTERY VOLTAGE (V)
BATTERY CURRENT (mA)
5.0 4.5 4.0 3.5 3.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
2.5 5.5
INPUTS AC-COUPLED TO AGND
SDSPK = SDBST = V
BAT
BATTERY CURRENT
vs. BATTERY VOLTAGE
MAX98500 toc02
BATTERY VOLTAGE (V)
BATTERY CURRENT (µA)
5.0 4.5 4.0 3.5 3.0
80
100
120
140
60
2.5 5.5
INPUTS AC-COUPLED TO AGND
SDSPK = GND, SDBST = V
BAT
BATTERY CURRENT
vs. BATTERY VOLTAGE
MAX98500 toc03
BATTERY VOLTAGE (V)
BATTERY CURRENT (µA)
5.0 4.5 4.0 3.5 3.0
1
2
3
4
5
6
7
8
9
10
0
2.5 5.5
INPUTS AC-COUPLED TO AGND
SDSPK = V
BAT , SDBST = AGND
TURN-ON RESPONSE
MAX98500 toc04
V CCOUT
2V/div
SPKR
OUTPUT
1V/div
SDBST
2V/div
OV
OV
OV
2ms/div
EFFICIENCY vs. OUTPUT POWER
MAX98500 toc05
P OUT (W)
EFFICIENCY (%)
2.0 1.5 1.0 0.5
10
20
30
40
50
60
70
80
90
100
0
0 2.5
V BAT = 4.2V
V BAT = 3.6V
V BAT = 3.0V
Z LOAD = 8I + 68µH
f IN = 1kHz