MAX9736AETJ Datasheet, PDF (1/25 Pages) Maxim Integrated Products – Mono/Stereo High-Power Class D Amplifier

19-3108; Rev 3; 9/09
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Mono/Stereo High-Power Class D Amplifier
General Description
The MAX9736A/B/D Class D amplifiers provide high-
performance, thermally efficient amplifier solutions. The
MAX9736A delivers 2 x 15W into 8Ω loads, or 1 x 30W
into a 4Ω load. The MAX9736B/D deliver 2 x 6W into 8Ω
loads or 1 x 12W into a 4Ω load.
These devices operate from 8V to 28V and provide a
high PSRR, eliminating the need for a regulated power
supply. The MAX9736 offers up to 88% efficiency at
12V supply.
Pin-selectable modulation schemes select between fil-
terless modulation and classic PWM modulation.
Filterless modulation allows the MAX9736 to pass CE
EMI limits with 1m cables using only a low-cost ferrite
bead and capacitor on each output. Classic PWM mod-
ulation is optimized for best audio performance when
using a full LC filter.
A pin-selectable stereo/mono mode allows stereo oper-
ation into 8Ω loads or mono operation into 4Ω loads. In
mono mode, the right input op amp becomes available
as a spare device, allowing flexibility in system design.
Comprehensive click-and-pop reduction circuitry mini-
mizes noise coming into and out of shutdown or mute.
Input op amps allow the user to create summing amplifiers,
lowpass or highpass filters, and select an optimal gain.
The MAX9736A/B/D are available in 32-pin TQFN pack-
ages and specified over the -40°C to +85°C tempera-
ture range.
Features
o Wide 8V to 28V Supply Voltage Range
o Spread-Spectrum Modulation Enables Low EMI
Solution
o Passes CE EMI Limits with Low-Cost Ferrite
Bead/Capacitor Filter
o Low BOM Cost
o High 67dB PSRR at 1kHz Reduces Supply Cost
o 88% Efficiency Eliminates Heatsink
o Thermal and Output Current Protection
o < 1µA Shutdown Mode
o Mute Function
o Space-Saving, 32-Pin TQFN Packages, 7mm x
7mm x 0.8mm (MAX9736A/B), 5mm x 5mm x
0.8mm (MAX9736D)
LCD/PDP/CRT Monitors
LCD/PDP/CRT TVs
MP3 Docking Stations
Applications
Notebook PCs
PC Speakers
All-in-One PCs
Ordering Information
PART
STEREO/MONO
OUTPUT POWER
PIN-PACKAGE
MAX9736AETJ+
2 x 15W/
1 x 30W
32 TQFN-EP*
7mm x 7mm
Note: All devices are specified over the -40°C to +85°C oper-
ating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Ordering Information continued at end of data sheet.
Simplified Diagram
8V TO 28V
AUDIO
INPUTS
INPUT RESISTORS AND
SHDN
CAPACITORS SELECT GAIN MUTE
AND CUTOFF FREQUENCY
MONO
8Ω
8Ω
MAX9736
________________________________________________________________ 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.