max98306 Maxim Integrated Products, Inc., max98306 Datasheet

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max98306

Manufacturer Part Number
max98306
Description
Stereo 3.7w Class D Amplifier
Manufacturer
Maxim Integrated Products, Inc.
Datasheet

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19-5919; Rev 0; 6/11
The MAX98306 stereo 3.7W Class D amplifier provides
Class AB audio performance with Class D efficiency.
This device offers five selectable gain settings (6dB,
9dB, 12dB, 15dB, and 18dB) set by a single gain-select
input (GAIN).
Active emissions limiting, edge-rate, and overshoot con-
trol circuitry combined with a filterless spread-spectrum
modulation scheme (SSM) provide excellent EMI perfor-
mance while eliminating the need for output filtering found
in traditional Class D devices. These features reduce
application component count.
The IC's 2.0mA quiescent current with a 3.7V supply
extends battery life in portable applications.
The IC is available in a 14-pin TDFN (3mm x 3mm x
0.75mm) package specified over the extended -40NC to
+85NC temperature range.
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.
Smartphones
Tablets
Cellular Phones
Accessory Speakers
_______________________________________________________________ Maxim Integrated Products 1
General Description
MP3 Players
Portable Audio Players
VoIP Phones
Applications
PVDD
PVDD
1µF
1µF
1µF
1µF
Stereo 3.7W Class D Amplifier
SHDN
GAIN
INL+
INR+
INR-
INL-
CONTROL
PGND
PVDD
GAIN
MAX98306
+2.6V TO +5.5V
S Output Power 3.7W at 3I, 10% THD, 1.7W at 8I,
S Passes EMI Limit Unfiltered with Up to 12in of
S High 83dB PSRR at 217Hz
S Spread-Spectrum Modulation and Active
S Five Pin-Selectable Gains
S Excellent Click-and-Pop Suppression
S Thermal and Overcurrent Protection
S Low-Current Shutdown Mode
S Space-Saving, 3mm x 3mm x 0.75mm,
+Denotes a lead(Pb)-free/RoHS-compliant package.
MAX98306ETD+
10% THD, with 5V Supply
Speaker Cable
Emissions Limiting
14-Pin TDFN
0.1µF
PART
OUTL+
OUTL-
OUTR+
OUTR-
10µF
Typical Application Circuit
-40NC to +85NC
TEMP RANGE
Ordering Information
PACKAGE
14 TDFN
PIN-
Features
MARK
+AEV
TOP

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max98306 Summary of contents

Page 1

... Rev 0; 6/11 General Description The MAX98306 stereo 3.7W Class D amplifier provides Class AB audio performance with Class D efficiency. This device offers five selectable gain settings (6dB, 9dB, 12dB, 15dB, and 18dB) set by a single gain-select input (GAIN). Active emissions limiting, edge-rate, and overshoot con- ...

Page 2

Stereo 3.7W Class D Amplifier ABSOLUTE MAXIMUM RATINGS Voltage PVDD to PGND ....................................................-0.3V to +6V OUTL+, OUTR+, OUTL-, OUTR- to PGND ...........................................-0. All Other Pins to PGND .......................................-0.3V to +6V Current Continuous Current Into/Out of PVDD, PGND, OUTL+, ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 3.7V 0V, A PVDD SHDN PGND AC measurement bandwidth MIN PARAMETER SYMBOL Click-and-Pop Level Power-Supply Rejection Ratio PSRR Output Power P Total Harmonic Distortion Plus THD+N Noise ...

Page 4

Stereo 3.7W Class D Amplifier ELECTRICAL CHARACTERISTICS (continued 3.7V 0V, A PVDD SHDN PGND AC measurement bandwidth MIN PARAMETER SYMBOL Signal-to-Noise Ratio Efficiency Oscillator Frequency f Spread-Spectrum Bandwidth Current Limit ...

Page 5

V = 5.0V 0V 12dB, R PVDD SHDN PGND bandwidth +25NC, unless otherwise noted.) A THD+N vs. OUTPUT POWER 100 PVDD 22µH LOAD 10 ...

Page 6

Stereo 3.7W Class D Amplifier ( 5.0V 0V 12dB, R PVDD SHDN PGND bandwidth +25NC, unless otherwise noted.) A OUTPUT POWER vs. SUPPLY VOLTAGE 5 1kHz 4.5 Z ...

Page 7

... FREQUENCY (Hz) _______________________________________________________________________________________ Stereo 3.7W Class D Amplifier Typical Operating Characteristics (continued connected between OUT_+ to OUT_-, 20Hz to 22kHz AC measurement L L STARTUP RESPONSE MAX98306 toc23 100k TIME (1ms/div) SHUTDOWN RESPONSE MAX98306 toc24 SHDN 2V/div OUTL OUTR TIME (1ms/div) SHDN 2V/div OUTL OUTR 7 ...

Page 8

... OUTL+ Positive Left Speaker Output 14 OUTL- Negative Left Speaker Output — EP Exposed Pad. Connect the exposed pad directly to ground. 8 ______________________________________________________________________________________ TOP VIEW MAX98306 TDFN FUNCTION Pin Configuration Pin Description ...

Page 9

... The IC offers five programmable gains selected using the GAIN input. The IC features a low-power shutdown mode, drawing P 1FA (typ) of supply current. Drive SHDN low to place the MAX98306 into shutdown. Drive SHDN above 1.4V for normal operation. The IC speaker amplifier features Maxim’s comprehen- sive click-and-pop suppression. During startup, the click-and-pop suppression circuitry reduces any audible transient sources internal to the device ...

Page 10

Stereo 3.7W Class D Amplifier Applications Information Filterless Class D Operation Traditional Class D amplifiers require an output filter. The filter adds cost and size and decreases THD perfor- mance. The IC’s filterless modulation scheme does not require an output ...

Page 11

... PVDD 11, 12 UVLO/POWER CLICK-AND-POP MANAGEMENT SUPPRESSION MODULATOR (FIXED GAIN 2x) 2ND INTEGRATOR 2ND INTEGRATOR MODULATOR (FIXED GAIN 2x PGND Block Diagram PVDD OUTL+ LOW-EMI 13 DRIVER PGND PVDD OUTL- 14 LOW-EMI DRIVER PGND MAX98306 PVDD OUTR+ LOW-EMI 10 DRIVER PGND PVDD OUTR- 9 LOW-EMI DRIVER PGND 11 ...

Page 12

Stereo 3.7W Class D Amplifier For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix ...

Page 13

For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains ...

Page 14

... 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 14 2011 Maxim Integrated Products © DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc. Revision History PAGES CHANGED — ...

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