MAX4295 Maxim, MAX4295 Datasheet
MAX4295
Manufacturer Part Number
MAX4295
Description
Mono/Stereo 2W Switch-Mode (Class-D) Audio Power Amplifiers
Manufacturer
Maxim
Datasheet
1.MAX4295.pdf
(18 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX4295EEE
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX4295/MAX4297 mono/stereo, switch-mode
(Class-D) audio power amplifiers operate from a single
+2.7V to +5.5V supply. They have >85% efficiency and
are capable of delivering 2W continuous power to a 4Ω
load, making them ideal for portable multimedia and
general-purpose high-power audio applications.
The MAX4295/MAX4297 feature a total harmonic distor-
tion plus noise (THD+N) of 0.4% (f
quiescent current of 2.8mA (MAX4295) or 4.6mA
(MAX4297), high efficiency, and clickless power-up and
shutdown. The SHDN input disables the device and lim-
its supply current to <1.5µA (MAX4295) or <2.3µA
(MAX4297). Other features include a 1A current limit,
thermal protection, and under-voltage lockout.
The MAX4295 (mono) and MAX4297 (stereo) reduce
the number of required external components. Both
devices have internal high-speed power-MOS transis-
tors, allowing operation as bridge-tied load (BTL) ampli-
fiers. The BTL configuration eliminates the need for
isolation capacitors on the output. The frequency-selec-
table pulse-width modulator (PWM) allows the user to
optimize the size and cost of the output filter.
The MAX4295 is offered in a space-saving 16-pin
QSOP package, and the MAX4297 is offered in a com-
pact 24-pin SSOP package.
Palmtop/Notebook
Computers
PDA Audio
Sound Cards
Game Cards
19-1746; Rev 1; 2/01
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
________________________________________________________________ Maxim Integrated Products
Mono/Stereo 2W Switch-Mode (Class-D)
INPUTR
INPUTL
General Description
V
V
CC
CC
CIN
CIN
Boom Boxes
AC Amplifiers
Battery-Powered Speakers
Cordless Phones
Portable Equipment
RIN
RIN
OSC
Applications
= 125kHz), low
RF
RF
14
12
11
22
15
1
2
CSS
AOUTL
AOUTR
INR
FS1
FS2
INL
SHDN
24
SS
3
V
V
CC
CC
MAX4297
10
AGND
16, 21
4, 9,
V
V
Audio Power Amplifiers
18, 19
PVCC
PVCC
6, 7,
o +2.7V to +5.5V Single-Supply Operation
o 2W/Channel Output Power at 5V
o 87% Efficiency (R
o 0.4% THD+N (R
o Logic-Programmable PWM Frequency Selection
o Low-Power Shutdown Mode
o Clickless Transitions Into and Out of Shutdown
o 1A Current Limit and Thermal Protection
o Available in Space-Saving Packages
Pin Configurations appear at end of data sheet.
PGND
MAX4295EEE
MAX4295ESE
MAX4297EAG
MAX4297EWG
OUT+R
OUT+L
OUT-R
OUT-L
VCM*
0.7W/Channel Output Power at 3V
(125kHz, 250kHz, 500kHz, 1MHz)
16-Pin QSOP (MAX4295)
24-Pin SSOP (MAX4297)
PART
5
17
13
20
8
*DO NOT CONNECT.
L2A
L1A
L1B
L2B
+
C2A
C1A
C1B
C2B
Typical Operating Circuit
L
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
= 4Ω, f
L
Ordering Information
= 4Ω, P
OSC
O
= 125kHz)
= 2W, MAX4295)
PIN-PACKAGE
16 QSOP
16 Narrow SO
24 SSOP
24 Wide SO
Features
1
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