MAX9709ETN+D Maxim Integrated Products, MAX9709ETN+D Datasheet

IC AMP AUDIO PWR 50W STER 56TQFN

MAX9709ETN+D

Manufacturer Part Number
MAX9709ETN+D
Description
IC AMP AUDIO PWR 50W STER 56TQFN
Manufacturer
Maxim Integrated Products
Type
Class Dr
Datasheet
1.MAX9709ETND.pdf (20 pages)

Specifications of MAX9709ETN+D

Output Type
1-Channel (Mono) or 2-Channel (Stereo)
Max Output Power X Channels @ Load
50W x 1 @ 4 Ohm; 29W x 2 @ 8 Ohm
Voltage - Supply
10 V ~ 22 V
Features
Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection, Shutdown
Mounting Type
Surface Mount
Package / Case
56-TQFN
Product
Class-D
Output Power
29 W
Common Mode Rejection Ratio (min)
70 dB
Thd Plus Noise
0.1 %
Operating Supply Voltage
10 V to 22 V
Supply Current
20 mA
Maximum Power Dissipation
3.81 W
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Supply Voltage (max)
22 V
Supply Voltage (min)
10 V
Amplifier Class
D
No. Of Channels
1
Supply Voltage Range
10V To 22V
Load Impedance
4ohm
Operating Temperature Range
-40°C To +85°C
Amplifier Case Style
TQFN
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
19-3769; Rev 1; 5/08
Pin Configurations appear at end of data sheet.
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.
CHANNEL
CHANNEL
TH0, TH1,
FS1, FS2
G1, G2
MONO
SYNC
RIGHT
LCD TVs
Automotive
LEFT
TH2
2
CONTROL
GAIN
________________________________________________________________ Maxim Integrated Products
2
25W/50W, Filterless, Spread-Spectrum,
STEREO MODE
General Description
MODULATOR
CLASS D
PDP TVs
PC/HiFi Audio Solutions
3
MAX9709
Applications
PROTECTION
OUTPUT
Stereo/Mono, Class D Amplifier
SYNCOUT
TEMP
TH0, TH1,
FS1, FS2
G1, G2
AUDIO
INPUT
SYNC
♦ 2 x 25W Output Power in Stereo Mode
♦ 1 x 50W Output Power in Mono Mode
♦ High Efficiency: Up to 87%
♦ Filterless Class D Amplifier
♦ Unique Spread-Spectrum Mode
♦ Programmable Gain (+22dB, +25dB, +29.5dB,
♦ High PSRR (90dB at 1kHz)
♦ Differential Inputs Suppress Common-Mode
♦ 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
+ Denotes a lead-free package.
** EP = Exposed pad.
TH2
V
MONO
DIGITAL
MAX9709ETN+
(8Ω, THD = 10%)
(4Ω, THD = 10%)
+36dB)
Noise
Package: 56-Pin TQFN
PART
2
CONTROL
GAIN
2
Simplified Block Diagram
-40°C to +85°C
TEMP RANGE
MONO MODE
MODULATOR
Ordering Information
CLASS D
3
MAX9709
PROTECTION
OUTPUT
PIN-PACKAGE
56 TQFN-EP**
Features
SYNCOUT
TEMP
1

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MAX9709ETN+D Summary of contents

Page 1

... G1 TH0, TH1, TH2 STEREO MODE ________________________________________________________________ Maxim Integrated Products 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. Stereo/Mono, Class D Amplifier ♦ 25W Output Power in Stereo Mode (8Ω, THD = 10%) ♦ 50W Output Power in Mono Mode (4Ω ...

Page 2

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier ABSOLUTE MAXIMUM RATINGS PGND, GND .......................................-0.3 to +30V ..........................................................-0.3V to +0. OUTR+, OUTR-, OUTL+, OUTL- to PGND, GND..........................-0.3V to (PV C1N to ...

Page 3

Filterless, Spread-Spectrum, ELECTRICAL CHARACTERISTICS (continued) ( +20V, PGND = GND = 0V mode), SHDN = MUTE = high low high (A connected between OUT_+ and OUT_-, unless otherwise stated. ...

Page 4

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier ELECTRICAL CHARACTERISTICS (continued) ( +20V, PGND = GND = 0V mode), SHDN = MUTE = high low high (A connected between OUT_+ and ...

Page 5

Filterless, Spread-Spectrum, ( +20V, PGND = GND = 0V low, MUTE = high low high, FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (R ...

Page 6

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier ( +20V, PGND = GND = 0V low, MUTE = high low high, FS1 = FS2 = high (SSM), SYNCIN = low. ...

Page 7

Filterless, Spread-Spectrum, ( +20V, PGND = GND = 0V low, MUTE = high low high, FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (R ...

Page 8

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier ( +20V, PGND = GND = 0V low, MUTE = high low high, FS1 = FS2 = high (SSM), SYNCIN = low. ...

Page 9

Filterless, Spread-Spectrum, PIN NAME 8 C1N Charge-Pump Flying Capacitor C1, Negative Terminal 9 C1P Charge-Pump Flying Capacitor C1, Positive Terminal 10 CPV Charge-Pump Power Supply. Bypass SYNCOUT Open-Drain Slew-Rate-Limited Clock Output. Pullup with a 10kΩ ...

Page 10

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier V DIGITAL 15 FS1 14 FS2 13 SYNCIN 1μ INL+ + LEFT CHANNEL 1μ INL- - 1μ INR+ + RIGHT 1μF CHANNEL R IN ...

Page 11

Filterless, Spread-Spectrum, Typical Application Circuits/Functional Diagrams (continued) V DIGITAL FS1 15 14 FS2 13 SYNCIN 1μ INR+ + AUDIO INPUT 1μ INR SHDN V DIGITAL 31 MUTE ...

Page 12

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier Detailed Description The MAX9709 filterless, Class D audio power amplifier features several improvements to switch mode amplifi- er technology. The MAX9709 is a two-channel, stereo amplifier with 25W output power on each channel. ...

Page 13

Filterless, Spread-Spectrum, TEMP returns high once the junction temperature cools below the set threshold minus the thermal hysteresis. If TEMP is connected to either MUTE or SS, the audio output resumes. The temperature threshold is set by the TH0, ...

Page 14

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier Linear Regulator (REG) The supply voltage range for the MAX9709 is from 10V to 22V to achieve high-output power. An internal linear regulator reduces this voltage to 6.3V for use with small-signal and ...

Page 15

Filterless, Spread-Spectrum, Sharing Input Sources In certain systems, a single audio source can be shared by multiple devices (speaker and headphone amplifiers). When sharing inputs common to mute the unused device, rather than completely shutting it down. ...

Page 16

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier Auxiliary Heatsinking If operating in higher ambient temperatures possible to improve the thermal performance board with the addition of an external heatsink. The thermal resis- tance to this ...

Page 17

Filterless, Spread-Spectrum, The circuit in Figure 6 uses inverting amplifiers for their ease in biasing. Note the phase labeling at the outputs has been reversed. The resistors should better in tolerance and the capacitors 5% tolerance ...

Page 18

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier RIGHT AUDIO INPUT LEFT AUDIO INPUT NOTE: OP AMP POWER PINS OMITTED FOR CLARITY. ALL RESISTORS ARE 1% OR BETTER. ALL CAPACITORS ARE 5% OR BETTER. Figure 6. Fully Differential Crossover Filters 18 ...

Page 19

Filterless, Spread-Spectrum, TOP VIEW N.C. PGND PGND PGND C1N C1P CPV DD SYNCOUT N.C. SYNCIN FS2 Package Information For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE ...

Page 20

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products ...

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