Rainbow Electronics MAX98500 - Manual (Page 8)

8 ______________________________________________________________________________________
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.)
Boost Converter
EFFICIENCY vs. OUTPUT CURRENT
MAX98500 toc18
I OUT (mA)
EFFICIENCY (%)
1400 1200 800 1000 400 600 200
82
84
86
88
90
92
94
96
98
100
80
0 1600
V BAT = 5V
V BAT = 4.2V
V BAT = 4V
V BAT = 3.6V
V BAT = 3V
V BAT = 3.3V
LOAD REGULATION vs. OUTPUT CURRENT
MAX98500 toc19
I OUT (mA)
LOAD REGULATION (%)
1400 1200 1000 800 600 400 200
-1.0
-0.8
-0.6
-0.4
-0.2
0
0.2
-1.2
0 1600
V BAT = 5V
V BAT = 4.2V
V BAT = 4V
V BAT = 3V
V BAT = 3.3V
V BAT = 3.6V
OUTPUT VOLTAGE vs. OUTPUT CURRENT
MAX98500 toc20
I OUT (A)
OUTPUT VOLTAGE (V)
1400 1200 200 400 600 800 1000
5.45
5.46
5.47
5.48
5.49
5.50
5.51
5.52
5.44
0 1600
V BAT = 3V
V BAT = 3.3V
V BAT = 3.6V
V BAT = 4.2V
V BAT = 5V
SWITCHING FREQUENCY
vs. BATTERY VOLTAGE
MAX98500 toc21
BATTERY VOLTAGE (V)
SWITCHING FREQUENCY (MHz)
4.3 4.1 3.9 3.7 3.5 3.3 3.1 2.9 2.7
1.98
I OUT = 100mA
2.00
2.02
2.04
1.96
2.5 4.5
I OUT = 500mA
SOFT-START
MAX98500 toc22
V CCOUT
2V/div
0V
0V
1ms/div
SDBST
2V/div