MAX9768 Maxim Integrated Products, MAX9768 Datasheet

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MAX9768

Manufacturer Part Number
MAX9768
Description
10W Mono Class D Speaker Amplifier
Manufacturer
Maxim Integrated Products
Datasheet

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The MAX9768 mono 10W Class D speaker amplifier
provides high-quality, efficient audio power with an inte-
grated volume control function.
The MAX9768 features a 64-step dual-mode (analog or
digitally programmable) volume control and mute func-
tion. The audio amplifier operates from a 4.5V to 14V
single supply and can deliver up to 10W into an 8Ω
speaker with a 14V supply.
A selectable spread-spectrum mode reduces EMI-radiat-
ed emissions, allowing the device to pass EMC testing
with ferrite bead filters and cable lengths up to 1m. The
MAX9768 can be synchronized to an external clock,
allowing synchronization of multiple Class D amplifiers.
The MAX9768 features high 77dB PSRR, low 0.08%
THD+N, and SNR up to 97dB. Robust short-circuit and
thermal-overload protection prevent device damage
during a fault condition. The MAX9768 is available in a
24-pin thin QFN-EP (4mm x 4mm x 0.8mm) package
and is specified over the extended -40°C to +85°C tem-
perature range.
19-0854; Rev 0; 9/07
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.
Notebook Computers
Flat-Panel Displays
Multimedia Monitors
SPEAKER
AUDIO
INPUT
________________________________________________________________ Maxim Integrated Products
I
ANALOG OR
2
C VOLUME
CONTROL
SHDN
MUTE
General Description
GPS Navigation
Systems
Security/Personal
Mobile Radio
Applications
3.3V
MAX9768
Amplifier with Volume Control
4.5V TO 14V
10W Mono Class D Speaker
♦ 10W Output (8Ω, PV
♦ Patented Spread-Spectrum Modulation
♦ Meets EN55022B EMC with Ferrite Bead Filters
♦ Amplifier Operation from 4.5V to 14V Supply
♦ 64-Step Integrated Volume Control (I
♦ Low 0.08% THD+N (R
♦ High 77dB PSRR
♦ Two t
♦ Low-Power Shutdown Mode (0.5µA)
♦ Short-Circuit and Thermal-Overload Protection
Note: All devices are specified over the -40°C to +85°C oper-
ating temperature range.
+ Denotes lead-free package.
* EP = Exposed pad.
Pin Configuration located at end of data sheet.
MAX9768ETG+
MAX9768BETG+
FILTERLESS
CLASS D
SPEAKER
OUTPUT
MAX9768—220ms
MAX9768B—15ms
PART
ON
Times Offered
40
35
30
25
20
15
10
5
0
MAX9768 EMI WITH FERRITE BEAD FILTERS
Simplified Block Diagram
0
(V
100 200 300
DD
24 TQFN-EP*
24 TQFN-EP*
PIN-PACKAGE
= 12V, 1m CABLE, 8Ω LOAD)
Ordering Information
DD
OVER 20dB MARGIN
TO EN55022B LIMIT
L
FREQUENCY (MHz)
400
= 8Ω, P
= 14V, THD+N = 10%)
500 600
OUT
700
t
ON
220
800
15
= 6W)
(ms)
900
2
Features
C or Analog)
1000
T2444+4
T2444+4
CODE
PKG
1

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