MAX9737 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Mono 7W Class D Amplifier

19-4327; Rev 0; 10/08
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Mono 7W Class D Amplifier
General Description
The MAX9737 mono 7W Class D amplifier provides a
high-performance, thermally efficient amplifier solution
that offers up to 88% efficiency at a 12V supply. The
device operates from 8V to 28V and provides a high 80dB
PSRR, eliminating the need for a regulated power supply.
Filterless modulation allows the MAX9737 to pass CE
EMI limits with 1m cables using only a low-cost ferrite
bead and small-value capacitor on each output.
Comprehensive click-and-pop suppression circuitry
reduces noise on power-up/down or into and out of
shutdown or mute.
An input op amp allows the user to create a lowpass or
highpass filter, and select an optimal gain. The internal
precharge circuit ensures clickless/popless turn-on
within 10ms.
The MAX9737 is available in the 24-pin, TQFN-EP pack-
age and is specified over the -40°C to +85°C tempera-
ture range.
Applications
2.1 Notebook PCs
LCD/PDP/CRT Monitors
PC Surround Speakers
MP3 Docking Stations
Features
♦ 8V to 28V Supply Voltage Range
♦ Spread-Spectrum Modulation Enables Low-EMI
Solution
♦ Passes EMI Limit with Up to 1m of Speaker Cable
♦ High 80dB PSRR
♦ Up to 88% Efficiency Eliminates Heatsink
♦ Thermal and Output Current Protection
♦ < 1µA Shutdown Mode
♦ Click-and-Pop Suppression
♦ < 10ms Turn-On Time
♦ Space-Saving, 4mm x 4mm x 0.8mm, 24-Pin TQFN
Package
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX9737ETG+
-40°C to +85°C
24 TQFN-EP*
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
8V TO 28V
Simplified Diagram
PRECHARGE
AUDIO
INPUT
8Ω
SHDN
MUTE
MAX9737
INPUT RESISTORS AND
CAPACITORS SELECT GAIN
AND CUTOFF FREQUENCY
Pin Configuration and Typical Application Circuit appear at
end of data sheet.
________________________________________________________________ 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.