19-4450; Rev 0; 2/09
MAX9792A Evaluation Kit
Evluates:MX792A
General Description
Features
The MAX9792A evaluation kit (EV kit) demonstrates the
MAX9792A IC, which combines a mono Class D power
amplifier, a DirectDrive® stereo headphone amplifier,
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.
♦ No DC-Blocking Output Capacitors Required at
Headphone Output
♦ Speaker and Headphone Operation
Speaker: 3W Mono Class D Output
Headphone: 180mW Stereo DirectDrive Output
♦ Wake-on-Beep Function
♦ 120mA, 4.75V LDO
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.
♦ Lead(Pb)-Free and RoHS Compliant
♦ Fully Assembled and Tested
Ordering Information
PART
TYPE
MAX9792AEVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
OPTIONAL COMPONENTS
REQUIRED COMPONENTS
1µF 10ꢀ, 10V X7R ceramic
capacitors (0603)
Murata GRM188R71A105K
AVDD, HPVDD,
PGND,
C1, C5, C6,
C25–C28
7
3
3
3
5
Binding posts
SPOUT+,
SPOUT-
1µF 10ꢀ, 50V X7R ceramic
capacitors (0805)
Murata GRM21BR71H105K
C3, C4, C29
C7, C8, C9
C13, C14, C19,
C20, C23, C24,
C33
Not installed, ceramic capacitors
(0603)
0
0
0.1µF 10ꢀ, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K
Not installed, ceramic capacitor
(0805)
C16
10µF 10ꢀ, 10V X7R ceramic
capacitors (0805)
Murata GRM21BR71A106K
HPINL
1
2
White side-entry phono jack
Red side-entry phono jacks
C10, C30, C31
HPINR, SPIN
HPL, HPR,
PGND, SENSE,
SPO+, SPO-
R1
1
3
20kΩ 1ꢀ resistor (0603)
0
Not installed, small PCB test points
R3, R4, R13
40.2kΩ 1ꢀ resistors (0603)
Speaker and headphone amplifiers
with LDO (28 TQFN-EP*)
Maxim MAX9792AETI+
HPOUT
JU1, JU2, JU3
JU4, JU5
1
3
2
3.5mm stereo headphone jack
3-pin headers
U1
—
1
1
2-pin headers
PCB: MAX9792A Evaluation Kit+
Not installed, inductors (6.4mm x
6mm x 1.5mm)
L3, L4
0
*EP = Exposed pad.
R7, R8
R11, R12, R15
—
2
0
5
0Ω 5ꢀ resistors (0805)
Not installed, resistors (0603)
Shunts (JU1–JU5)
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
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.