Datasheet

MAX4295
Mono, 2W, Switch-Mode (Class D)
Audio Power Amplifier
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= PV
CC
= +5V, SHDN = V
CC
, FS1 = GND, FS2 = V
CC
(f
OSC
= 250kHz), input amplifier gain = -1V/V, T
A
= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
, PV
CC
to GND or PGND....................................-0.3V to +6V
PGND to GND.....................................................................±0.3V
PV
CC
to V
CC
.......................................................................±0.3V
VCM, SS, AOUT, IN to GND.......................-0.3V to (V
CC
+ 0.3V)
SHDN, FS1, FS2 to GND ..........................................-0.3V to +6V
OUT_ to PGND.........................................-0.3V to (PV
CC
+ 0.3V)
Op Amp Output Short-Circuit
Duration (AOUT).........Indefinite Short Circuit to Either Supply
H-Bridge Short-Circuit
Duration (OUT_) ................Continuous Short Circuit to PGND,
PV
CC
or between OUT+ and OUT-
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.30mW/°C above +70°C)........667mW
16-Pin Narrow SO (derate 8.7mW/°C above +70°C)......696mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
GENERAL
Supply Voltage Range (Note 2) 2.7 5.5 V
Quiescent Supply Current Output load not connected 2.8 4
mA
Shutdown Supply Current SHDN = GND 1.5 8 µA
Voltage at VCM Pin
0.285 ×
V
CC
0.3 ×
V
CC
0.315 ×
V
CC
V
FS1 = GND, FS2 = GND
105 125
145
FS1 = GND, FS2 = V
CC
210 250
290
FS1 = V
CC
, FS2 = GND
420 500
580
PWM Frequency
FS1 = V
CC
, FS2 = V
CC
840 1000 1160
kHz
PWM Frequency Change with
V
CC
V
CC
= 2.7V to 5.5V ±1 ±3
kHz/V
V
IN
= 0.06 × V
CC
10.2
12
13.8
V
IN
= 0.30 × V
CC
49.2
50
50.8
Duty Cycle
V
IN
= 0.54 × V
CC
86.2
88
89.8
%
Duty Cycle Change with V
CC
V
IN
= 0.3 × V
CC
, V
CC
= 2.7V to 5.5V
±0.02 ±0.15
%/V
V
CC
= 5V
0.25
0.5
Switch On-Resistance
(each power device)
I
OUT
= 150mA
V
CC
= 2.7V
0.35
1.0
H-Bridge Output Leakage SHDN = GND 0 ±5 µA
H-Bridge Current Limit 1A
Soft-Start Capacitor Charging
Current
V
SS
= 0V
0.75 1.35 1.95
µA
Undervoltage Lockout 1.8 2.2 2.6 V
Thermal Shutdown Trip Point
145
°C