Datasheet

_______________________________________________________________________________________ 3
MAX98502
Boosted 2.2W Class D Amplifier
with Automatic Level Control
ELECTRICAL CHARACTERISTICS (continued)
(V
BAT
= 3.6V, R
L
= J between SPKP and SPKN, A
V
= +6dB, C
IN
= 1FF, 20Hz to 22kHz AC measurement bandwidth, T
A
= T
MIN
to
T
MAX
, unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Switching Frequency f
S
1.8 2.0 2.2 MHz
Efficiency
E 0.1A P I
OUT
P 0.75A
93 %
Startup Short-Circuit Time Converter latch off 50 ms
Thermal Shutdown 165
NC
LX Leakage Current
V
LX
= 0V or 5.5V,
V
CCOUT
= 5.5V
T
A
= +25NC
-1.0 +0.1 +1.0
FA
-40NC P T
A
P +85NC
0.1
SPEAKER AMPLIFIER
Output Offset Voltage V
OS
T
A
= +25NC
1 3 mV
Click-and-Pop Level K
CP
Peak voltage, T
A
=
+25NC, A-weighted, 32
samples per second,
Z
SPK
= 8I + 68FH,
(Notes 3, 4)
Into shutdown -56
dBV
Out of shutdown -56
Output Power (Note 5) P
OUT
Z
SPK
= 4I + 33FH
THD+N P 1%
3.4
W
THD+N P 10%
4.1
Z
SPK
= 8I + 68FH
THD+N P 1%
1.7
THD+N P 10%
2.2
Total Harmonic Distortion Plus
Noise
THD+N
f = 1kHz, P
OUT
= 1.7W, T
A
= +25NC,
Z
SPK
= 4I + 33FH
0.05 %
f = 1kHz, P
OUT
= 850mW, T
A
= +25NC,
Z
SPK
= 8I + 33FH
0.04
Output Switching Frequency 300 kHz
Gain A
V
GAIN = AGND 5.5 6 6.5
dBGAIN = unconnected 15 15.5 16
GAIN = V
BAT
19.5 20 20.5
Output Current Limit 2 A
Efficiency
E
P
OUT
= 1.5W, f = 1kHz, Z
SPK
= 8I + 68FH
92
%
P
OUT
= 1.5W, f = 1kHz, Z
SPK
= 4I + 33FH
87
Output Noise A-weighted 43
FV
RMS
Input Resistance R
IN
SDBST = SDSPK =
V
BAT
A
V
= 6dB
(GAIN = AGND)
36 54 72
kI
A
V
= 15.5dB
(GAIN =
unconnected)
12 18 26
A
V
= 20dB
(GAIN = V
BAT
)
6.5 11 16
V
SDBST
= V
SDSPK
= 0V
All gain settings 110
Common-Mode Rejection Ratio CMRR f = 1kHz 60 dB
Bias Voltage V
BIAS
1.3 1.4 1.5 V