OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MAX9709ETN+D

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
General Description
The MAX9709 stereo/mono, Class D audio power amplifi-
er delivers up to 2 x 25W into an 8Ω stereo mode and
1 x 50W into a 4Ω load in mono mode while offering up to
87% efficiency. The MAX9709 provides Class AB amplifi-
er performance with the benefits of Class D efficiency,
eliminating the need for a bulky heatsink and conserving
power. The MAX9709 operates from a single +10V to
+22V supply, driving the load in a BTL configuration.
The MAX9709 offers two modulation schemes: a fixed-fre-
quency modulation (FFM) mode, and a spread-spectrum
modulation (SSM) mode that reduces EMI-radiated emis-
sions. The MAX9709 can be synchronized to an external
clock from 600kHz to 1.2MHz. A synchronized output
allows multiple units to be cascaded in the system.
Features include fully differential inputs, comprehensive
click-and-pop suppression, and four selectable-gain set-
tings (22dB, 25dB, 29.5dB, and 36dB). A pin-program-
mable thermal flag provides seven different thermal
warning thresholds. Short-circuit and thermal-overload
protection prevent the device from being damaged
during a fault condition.
The MAX9709 is available in a 56-pin TQFN (8mm x
8mm x 0.8mm) package, and is specified over the
extended -40°C to +85°C temperature range.
Applications
LCD TVs PDP TVs
Automotive PC/HiFi Audio Solutions
Features
♦ 2 x 25W Output Power in Stereo Mode
(8Ω, THD = 10%)
♦ 1 x 50W Output Power in Mono Mode
(4Ω, THD = 10%)
♦ High Efficiency: Up to 87%
♦ Filterless Class D Amplifier
♦ Unique Spread-Spectrum Mode
♦ Programmable Gain (+22dB, +25dB, +29.5dB,
+36dB)
♦ High PSRR (90dB at 1kHz)
♦ Differential Inputs Suppress Common-Mode
Noise
♦ Shutdown and Mute Control
♦ Integrated Click-and-Pop Suppression
♦ Low 0.1% THD+N
♦ Current Limit and Thermal Protection
♦ Programmable Thermal Flag
♦ Clock Synchronization Input and Output
♦ Available in Thermally Efficient, Space-Saving
Package: 56-Pin TQFN
MAX9709
25W/50W, Filterless, Spread-Spectrum,
Stereo/Mono, Class D Amplifier
________________________________________________________________
Maxim Integrated Products
1
CLASS D
MODULATOR
SYNCOUT
TEMP
OUTPUT
PROTECTION
GAIN
CONTROL
FS1, FS2
MAX9709
STEREO MODE
G1, G2
2
SYNC
RIGHT
CHANNEL
LEFT
CHANNEL
MONO
2
TH0, TH1,
TH2
3
PART TEMP RANGE PIN-PACKAGE
MAX9709ETN+ -40°C to +85°C 56 TQFN-EP**
Simplified Block Diagram
Ordering Information
19-3769; Rev 1; 5/08
+
Denotes a lead-free package.
**
EP = Exposed pad.
Pin Configurations appear at end of data sheet.
EVALUATION KIT
AVAILABLE
CLASS D
MODULATOR
SYNCOUT
TEMP
OUTPUT
PROTECTION
GAIN
CONTROL
FS1, FS2
MAX9709
MONO MODE
G1, G2
2
SYNC
AUDIO
INPUT
V
DIGITAL
MONO
2
TH0, TH1,
TH2
3
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX9709
25W/50W, Filterless, Spread-Spectrum,
Stereo/Mono, Class D Amplifier
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(PV
DD
= V
DD
= +20V, PGND = GND = 0V, C
SS
= 0.47µF, C
REG
= 0.01µF, C1 = 0.1µF, C2 = 1µF, R
LOAD
= ∞, MONO = low (stereo
mode), SHDN = MUTE = high, G1 = low, G2 = high (A
V
= 22dB), FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (R
L
) are
connected between OUT_+ and OUT_-, unless otherwise stated. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at 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.
PV
DD
, V
DD
to PGND, GND .......................................-0.3 to +30V
PV
DD
to V
DD
..........................................................-0.3V to +0.3V
OUTR+, OUTR-, OUTL+,
OUTL- to PGND, GND..........................-0.3V to (PV
DD
+ 0.3V)
C1N to GND .............................................-0.3V to (PV
DD
+ 0.3V)
C1P to GND..............................(PV
DD
- 0.3V) to (CPV
DD
+ 0.3V)
CPV
DD
to GND ..........................................(PV
DD
- 0.3V) to +40V
All Other Pins to GND.............................................-0.3V to +12V
Continuous Input Current (except PV
DD
, V
DD
, OUTR+,
OUTR-, OUTL+, and OUTL-) ..........................................20mA
Continuous Power Dissipation (T
A
= +70°C)
56-Pin Thin QFN (derate 47.6mW/°C above +70°C) .....3.81W
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Thermal Resistance (θ
JC
)
56-Pin Thin QFN… ......................................................0.6°C/W
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
DD
Inferred from PSRR test 10 22 V
Shutdown Current I
SHDN
SHDN = low 0.1 1 µA
Shutdown to Full Operation t
SON
100 ms
Mute to Full Operation t
MUTE
100 ms
G1 = 0, G2 = 1 50 85 125
G1 = 1, G2 = 1 40 63 90
G1 = 1, G2 = 0 25 43 60
Input Impedance R
IN
G1 = 0, G2 = 0 12 21 30
kΩ
Output Pulldown Resistance SHDN = GND 600 kΩ
Output Offset Voltage V
OS
AC-coupled input, measured between
OUT_+ and OUT_-
3 ±40 mV
PV
DD
= 10V to 22V 67 90
f
RIPPLE
= 1kHz 90
Power-Supply Rejection Ratio PSRR
200mV
P-P
ripple
(Note 2)
f
RIPPLE
= 20kHz 52
dB
DC, input referred 49 70
Common-Mode Rejection Ratio CMRR
f = 20Hz to 20kHz, input referred 60
dB
Switch On-Resistance R
DS
One power switch 0.3 0.6 Ω
FS1 FS2
0 0 180 200 220
1 1 (SSM) 200
1 0 160
Switching Frequency f
SW
0 1 250
kHz
Oscillator Spread Bandwidth FS1 = FS2 = high (SSM) ±2 %
SYNCIN Lock Range Equal to f
SW
x 4 600 1200 kHz
MAX9709
25W/50W, Filterless, Spread-Spectrum,
Stereo/Mono, Class D Amplifier
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(PV
DD
= V
DD
= +20V, PGND = GND = 0V, C
SS
= 0.47µF, C
REG
= 0.01µF, C1 = 0.1µF, C2 = 1µF, R
LOAD
= ∞, MONO = low (stereo
mode), SHDN = MUTE = high, G1 = low, G2 = high (A
V
= 22dB), FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (R
L
) are
connected between OUT_+ and OUT_-, unless otherwise stated. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
G1 = 0, G2 = 1 21.6 22.0 22.3
G1 = 1, G2 = 1 24.9 25.0 25.6
G1 = 1, G2 = 0 29.2 29.5 29.9
Gain A
V
G1 = 0, G2 = 0 35.9 36.0 36.6
dB
TH2 TH1 TH0
000 80
001 90
0 1 0 100
0 1 1 110
1 0 0 120
1 0 1 129
1 1 0 139
TEMP Flag Threshold T
FLAG
111
°C
TEMP Flag Accuracy From +80°C to +140°C ±6 °C
TEMP Flag Hysteresis 2°C
STEREO MODE (R
LOAD
= 8Ω, Note 3)
MUTE = 1, R
LOAD
= ∞ 20 33
Quiescent Current
MUTE = 0 6.5 13
mA
P
VDD
= 20V 25
P
VDD
= 22V 29
Output Power P
OUT
f = 1kHz, THD =
10%, T
A
= +25°C
P
VDD
= 12V,
R
LOAD
= 4Ω
15
W
Total Harmonic Distortion Plus
Noise
THD+N
f = 1kHz, BW = 22Hz to 22kHz,
P
OUT
= 12W
0.1 %
22Hz to 22kHz 91
Signal-to-Noise Ratio SNR P
OUT
= 10W
A-weighted 96
dB
Efficiency η P
OU T
= 25W + 25W , f = 1kHz 87 %
Left-Right Channel Gain
Matching
R
LOAD
= ∞ 0.2 %
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

MAX9709ETN+D

Mfr. #:
Buy MAX9709ETN+D
Manufacturer:
Maxim Integrated
Description:
Audio Amplifiers 20W/40W Filterless Class D Amplifier
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet