Datasheet

4 ______________________________________________________________________________________
MAX98306
Stereo 3.7W Class D Amplifier
Typical Operating Characteristics
(V
PVDD
= V
SHDN
= 5.0V, V
PGND
= 0V, A
V
= 12dB, R
L
= J, R
L
connected between OUT_+ to OUT_-, 20Hz to 22kHz AC measurement
bandwidth, T
A
= +25NC, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS (continued)
(V
PVDD
= V
SHDN
= 3.7V, V
PGND
= 0V, A
V
= 12dB (GAIN = PVDD), R
L
= J, R
L
connected between OUT_+ to OUT_-, 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)
Note 2: This device is 100% production tested at T
A
= +25NC. All temperature limits are guaranteed by design.
Note 3: Amplifier inputs AC-coupled to ground.
Note 4: Specified at room temperature with an 8I resistive load in series with a 68µH inductive load.
THD+N vs. OUTPUT POWER
MAX98306 toc01
OUTPUT POWER (W)
THD+N (%)
0.750.500.25
0.01
0.1
1
10
100
0.001
0 1.00
V
PVDD
= 3.7V
Z
LOAD
= 8I + 68µH
f = 6kHz
f = 1kHz
f = 100kHz
THD+N vs. OUTPUT POWER
MAX98306 toc02
OUTPUT POWER (W)
THD+N (%)
1.751.501.251.000.750.500.25
0.01
0.1
1
10
100
0.001
0 2.00
V
PVDD
= 5V
Z
LOAD
= 8I + 68µH
f = 6kHz
f = 1kHz
f = 100kHz
THD+N vs. OUTPUT POWER
MAX98306 toc03
OUTPUT POWER (W)
THD+N (%)
3.02.52.01.51.00.5
0.01
0.1
1
10
100
0.001
0 3.5
V
PVDD
= 5V
Z
LOAD
= 4I + 33µH
f = 6kHz
f = 1kHz
f = 100kHz
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Signal-to-Noise Ratio SNR Z
SPK
= 8I +68FH, P
OUT
at 1% THD+N 99 dB
Efficiency
E
Z
SPK
= 8I +68FH, P
OUT
= 1.4W, f = 1kHz 92 %
Oscillator Frequency f
OSC
160 320 540 kHz
Spread-Spectrum Bandwidth 20 kHz
Current Limit T
A
= +25NC 3 A
Thermal-Shutdown Level +150 NC
Thermal Hysteresis 20 NC
DIGITAL INPUT (SHDN)
Input-Voltage High V
IH
1.4 V
Input-Voltage Low V
IL
0.4 V
Input Leakage Current T
A
= +25NC, SHDN = 0 ±1 FA