MAX9792AEVKIT+ Maxim Integrated, MAX9792AEVKIT+ Datasheet

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MAX9792AEVKIT+

Manufacturer Part Number
MAX9792AEVKIT+
Description
Audio Amplifiers Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers
Manufacturer
Maxim Integrated
Datasheet
1.MAX9792AEVKIT.pdf (11 pages)

Specifications of MAX9792AEVKIT+

Product
Class-D
Output Power
2 W
Thd Plus Noise
0.03 %
Supply Current
4.4 mA
Maximum Power Dissipation
2286 mW
Audio Load Resistance
4 Ohms
Common Mode Rejection Ratio (min)
60 dB
The MAX9792A evaluation kit (EV kit) demonstrates the
MAX9792A IC, which combines a mono Class D power
amplifier, a DirectDrive
and a 120mA, 4.75V low-dropout regulator (LDO) for
notebook, tablet PC, and portable media player appli-
cations. Maxim’s DirectDrive technology eliminates the
need for bulky DC-blocking capacitors at the output of
the headphone amplifier.
The EV kit is configured for a 12dB speaker amplifier
gain and a 0dB headphone amplifier gain. It is
designed to operate from a 4.5V to 5.5V speaker sup-
ply and an optional separate 2.7V to 5.5V headphone
supply. The EV kit is capable of delivering up to 3W into
a 3Ω speaker and 180mW into a 32Ω headphone load.
19-4450; Rev 0; 2/09
* EP = Exposed pad.
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.
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
REQUIRED COMPONENTS
DESIGNATION QTY
C10, C30, C31
C3, C4, C29
R3, R4, R13
C1, C5, C6,
C7, C8, C9
C25–C28
U1
R1
—
7
3
3
3
1
3
1
1
________________________________________________________________ Maxim Integrated Products
1µF ±10%, 10V X7R ceramic
capacitors (0603)
Murata GRM188R71A105K
1µF ±10%, 50V X7R ceramic
capacitors (0805)
Murata GRM21BR71H105K
0.1µF ±10%, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K
10µF ±10%, 10V X7R ceramic
capacitors (0805)
Murata GRM21BR71A106K
20kΩ ±1% resistor (0603)
40.2kΩ ±1% resistors (0603)
Speaker and headphone amplifiers
with LDO (28 TQFN-EP*)
Maxim MAX9792AETI+
PCB: MAX9792A Evaluation Kit+
General Description
®
stereo headphone amplifier,
DESCRIPTION
MAX9792A Evaluation Kit
♦ No DC-Blocking Output Capacitors Required at
♦ Speaker and Headphone Operation
♦ Wake-on-Beep Function
♦ 120mA, 4.75V LDO
♦ Lead(Pb)-Free and RoHS Compliant
♦ Fully Assembled and Tested
+ Denotes lead(Pb)-free and RoHS compliant.
MAX9792AEVKIT+
OPTIONAL COMPONENTS
DESIGNATION QTY
AVDD, HPVDD,
C13, C14, C19,
C20, C23, C24,
PGND, SENSE,
JU1, JU2, JU3
R11, R12, R15
HPINR, SPIN
Headphone Output
SPO+, SPO-
HPL, HPR,
SPOUT+,
JU4, JU5
SPOUT-
HPOUT
Speaker: 3W Mono Class D Output
Headphone: 180mW Stereo DirectDrive Output
PGND,
R7, R8
HPINL
L3, L4
C33
C16
PART
—
5
0
0
1
2
0
1
3
2
0
2
0
5
Ordering Information
Binding posts
Not installed, ceramic capacitors
(0603)
Not installed, ceramic capacitor
(0805)
White side-entry phono jack
Red side-entry phono jacks
Not installed, small PCB test points
3.5mm stereo headphone jack
3-pin headers
2-pin headers
Not installed, inductors (6.4mm x
6mm x 1.5mm)
0Ω ±5% resistors (0805)
Not installed, resistors (0603)
Shunts (JU1–JU5)
Component List
DESCRIPTION
TYPE
EV Kit
Features
1

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MAX9792AEVKIT+ Summary of contents

Page 1

... Headphone: 180mW Stereo DirectDrive Output ♦ Wake-on-Beep Function ♦ 120mA, 4.75V LDO ♦ Lead(Pb)-Free and RoHS Compliant ♦ Fully Assembled and Tested Ordering Information PART MAX9792AEVKIT+ + Denotes lead(Pb)-free and RoHS compliant. DESIGNATION QTY OPTIONAL COMPONENTS AVDD, HPVDD, PGND, 5 ...

Page 2

MAX9792A Evaluation Kit SUPPLIER Murata Electronics North America, Inc. Note: Indicate that you are using the MAX9792A when contacting this component supplier. Required Equipment • One 5V Supply • One 3Ω speaker • One stereo headphone • Two ...

Page 3

Speaker/Headphone Amplifier Shutdown Jumpers JU1 and JU2 enable or disable the speaker amplifier (SPKR_EN) and headphone amplifier (HP_EN), respectively. See Tables 1 and 2 for jumper JU1 and JU2 configuration to shut down or enable the respective amplifier. Jumper JU3 ...

Page 4

MAX9792A Evaluation Kit Speaker and Headphone Gain Setting The default gain-setting resistor (R1) configures the speaker amplifier gain to 12dB, while the default gain- setting resistors (R3 and R4) configure the headphone amplifier gain to 0dB. The gain can be ...

Page 5

Figure 1. MAX9792A EV Kit Schematic _______________________________________________________________________________________ MAX9792A Evaluation Kit 5 ...

Page 6

MAX9792A Evaluation Kit Figure 2. MAX9792A EV Kit Component Placement Guide—Component Side 6 _______________________________________________________________________________________ ...

Page 7

Figure 3. MAX9792A EV Kit PCB Layout—Component Side _______________________________________________________________________________________ MAX9792A Evaluation Kit 7 ...

Page 8

MAX9792A Evaluation Kit Figure 4. MAX9792A EV Kit PCB Layout—Layer 2 8 _______________________________________________________________________________________ ...

Page 9

Figure 5. MAX9792A EV Kit PCB Layout—Layer 3 _______________________________________________________________________________________ MAX9792A Evaluation Kit 9 ...

Page 10

MAX9792A Evaluation Kit Figure 6. MAX9792A EV Kit PCB Layout—Solder Side 10 ______________________________________________________________________________________ ...

Page 11

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2009 Maxim Integrated Products ...

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