max9709etntd Maxim Integrated Products, Inc., max9709etntd Datasheet

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max9709etntd

Manufacturer Part Number
max9709etntd
Description
Max9709 25w/50w, Filterless, Spread-spectrum, Stereo/mono, Class D Amplifier
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.MAX9709ETNTD.pdf (24 pages)
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 56-pin TQFN (8mm x 8mm
x 0.8mm) and 64-pin TQFP (10mm x 10mm x 1.4mm)
packages, and is specified over the extended
-40°C to +85°C temperature range.
19-3769; Rev 0; 9/05
Pin Configurations appear at end of data sheet.
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.
CHANNEL
CHANNEL
TH0, TH1,
FS1, FS2
G1, G2
MONO
SYNC
RIGHT
LCD TVs
Automotive
LEFT
TH2
2
CONTROL
________________________________________________________________ Maxim Integrated Products
GAIN
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
♦ 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 Patented 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
INPUT
+Denotes lead-free package.
*Future product—Contact factory for availability.
**EP = Exposed paddle.
SYNC
MAX9709ETN+
MAX9709ECB+* -40°C to +85°C 64 TQFP-EP**
TH2
V
DIGITAL
MONO
(8Ω, THD = 10%)
(4Ω, THD = 10%)
+36dB)
Noise
Packages: 56-Pin TQFN and 64-Pin TQFP
PART
2
CONTROL
GAIN
Simplified Block Diagram
2
-40°C to +85°C 56 TQFN-EP**
TEMP RANGE PIN-PACKAGE
Ordering Information
MONO MODE
MODULATOR
CLASS D
3
MAX9709
PROTECTION
OUTPUT
Features
SYNCOUT
TEMP
T5688-3
C64E-6
CODE
PKG
1

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max9709etntd Summary of contents

Page 1

Rev 0; 9/05 25W/50W, Filterless, Spread-Spectrum, General Description The MAX9709 stereo/mono, Class D audio power amplifi- er delivers 25W into an 8Ω stereo mode and 1 x 50W into a 4Ω load in mono mode ...

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 TQFP TQFN 9 8 C1N 10 9 C1P 11 10 CPV SYNCOUT Open-Drain Slew-Rate-Limited Clock Output. Pullup with a 10kΩ to resistor to REG SYNCIN 15 14 FS2 18 15 ...

Page 10

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier V DIGITAL 15 (18) FS1 14 (15) FS2 13 (14) SYNCIN 1µ (20) IN INL+ + LEFT CHANNEL 1µ (19) INL- - 1µ (30) INR+ ...

Page 11

Filterless, Spread-Spectrum, Typical Application Circuits/Functional Diagrams (continued) 22, 23 (25, 26) V DIGITAL FS1 15 (18) 14 (15) FS2 13 (14) SYNCIN 1µ (20) IN INR+ + AUDIO INPUT 1µ (19) INR ...

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, Stereo/Mono, Class D Amplifier TOP VIEW N.C. 43 N.C. 44 OUTR- 45 OUTR- 46 OUTR+ 47 OUTR+ 48 PGND 49 PGND 50 OUTL- 51 OUTL- 52 OUTL+ 53 OUTL+ 54 N.C. ...

Page 20

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier TOP VIEW N.C. 1 PGND 2 PGND 3 PGND N.C. 8 C1N 9 C1P 10 CPV 11 DD SYNCOUT 12 N.C. 13 SYNCIN ...

Page 21

Filterless, Spread-Spectrum, (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Stereo/Mono, Class D Amplifier Package Information PACKAGE OUTLINE 56L THIN QFN, 8x8x0.8mm 1 ...

Page 22

Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 22 ______________________________________________________________________________________ Package Information (continued) PACKAGE OUTLINE 56L THIN QFN, ...

Page 23

Filterless, Spread-Spectrum, (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Stereo/Mono, Class D Amplifier Package Information (continued) PACKAGE OUTLINE, 64L TQFP, 10x10x1.4mm 1 ...

Page 24

... Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Freed Quijano Package Information (continued) Printed USA is a registered trademark of Maxim Integrated Products, Inc. PACKAGE OUTLINE, 64L TQFP, 10x10x1.4mm 2 21-0083 B 2 ...

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