Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Audio amplifier 1-channel (mono) Class D TDFN 8 EP (2x2)

Mono 2.6W Class D Amplifier

MAX98300

EVALUATION KIT AVAILABLE

General Description

The MAX98300 mono 2.6W Class D amplifier provides

Class AB audio performance with Class D efficiency.

This device offers five selectable gain settings (0dB,

3dB, 6dB, 9dB, and 12dB) set by a single gain-select

input (GAIN).

Active emissions-limiting edge-rate and overshoot con-

trol circuitry greatly reduces EMI. A patented filterless

spread-spectrum modulation scheme eliminates the need

for output filtering found in traditional Class D devices.

These features reduce application component count.

The MAX98300 industry-leading 0.78mA at 3.7V (1.1mA

at 5V) quiescent current extends battery life in portable

applications.

The MAX98300 is available in an 8-pin TDFN-EP (2mm

x 2mm x 0.8mm) and a 9-bump (1.2mm x 1.2mm) WLP.

Both packages are specified over the extended -40NC to

+85NC temperature range.

Applications

Notebook and Netbook Computers

Cellular Phones

MP3 Players

Portable Audio Players

VoIP Phones

Features

S Industry-Leading Quiescent Current: 0.78mA at

3.7V, 1.1mA at 5V

S Spread Spectrum and Active Emissions Limiting

S Five Selectable Gains

S Click-and-Pop Suppression

S Thermal and Overcurrent Protection

S Low-Current Shutdown Mode

S Space-Saving Packages

2mm x 2mm x 0.8mm, 8-Pin TDFN-EP

1.2mm x 1.2mm, 9-Bump WLP (0.4mm Pitch)

19-5234; Rev 0; 7/10

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

Ordering Information

Typical Application Circuit

PART TEMP RANGE PIN-PACKAGE

MAX98300ETA+

-40NC to +85NC

8 TDFN-EP*

MAX98300EWL+

-40NC to +85NC

9 WLP

1µF

0.1µF

1µF

+2.6V TO +5.5V

IN+

*SYSTEM BULK CAPACITANCE

IN-

PVDD

+2.6V TO +5.5V

PGND

SHDN

GAIN

MAX98300

10µF*

OUT+

OUT-

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

Summary of content (14 pages)

PAGE 1
EVALUATION KIT AVAILABLE MAX98300 Mono 2.6W Class D Amplifier General Description Features The MAX98300 mono 2.6W Class D amplifier provides Class AB audio performance with Class D efficiency. This device offers five selectable gain settings (0dB, 3dB, 6dB, 9dB, and 12dB) set by a single gain-select input (GAIN). S Industry-Leading Quiescent Current: 0.78mA at 3.7V, 1.
PAGE 2
MAX98300 Mono 2.6W Class D Amplifier ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (TA = +70NC) for Multilayer Board TDFN-EP (derate 11.9mW/NC)...................................953.5mW WLP (derate 12mW/NC).............................................963.8mW Junction Temperature......................................................+150NC Operating Temperature Range........................... -40NC to +85NC Storage Temperature Range.............................
PAGE 3
MAX98300 Mono 2.6W Class D Amplifier ELECTRICAL CHARACTERISTICS (continued) (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB (GAIN = PVDD), RL = J, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz to 22kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Notes 1, 2) PARAMETER Power-Supply Rejection Ratio (Note 3) SYMBOL CONDITIONS VPVDD = 2.6V to 5.
PAGE 4
MAX98300 Mono 2.6W Class D Amplifier Typical Operating Characteristics (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB, RL = J, unless otherwise specified, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.) THD+N vs. FREQUENCY RL = 4I + 33FH VPVDD = 3.7V POUT = 800mW 0.1 0.01 POUT = 200mW 10 100 0.001 0.01 0.1 FREQUENCY (kHz) THD+N vs. FREQUENCY RL = 8I + 68FH VPVDD = 3.7V POUT = 100mW 1 10 fIN = 100Hz 100 0 0.5 FREQUENCY (kHz) 1.
PAGE 5
MAX98300 Mono 2.6W Class D Amplifier Typical Operating Characteristics (continued) (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB, RL = J, unless otherwise specified, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.) RL = 4I + 33FH 60 50 40 30 1% THD+N 2.5 2.0 1.5 1.2 0.8 0.6 0.4 10 0.5 0.2 0 0 0 1 1000 OUTPUT POWER vs. SUPPLY VOLTAGE OUTPUT POWER vs. SUPPLY VOLTAGE 1.0 1.2 1.4 RL = 4I + 33FH 2.00 1.75 10% THD+N 1% THD+N 0.
PAGE 6
MAX98300 Mono 2.6W Class D Amplifier Typical Operating Characteristics (continued) (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB, RL = J, unless otherwise specified, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.) STARTUP WAVEFORM SHUTDOWN WAVEFORM MAX98300 toc19 MAX98300 toc18 OUT_ OUT_ SHDN SHDN 1ms/div 1ms/div -40 -60 -80 -100 -60 -80 -100 -120 -140 10 1 100 0.1 0.
PAGE 7
MAX98300 Mono 2.6W Class D Amplifier Pin Configurations TOP VIEW (BUMP SIDE DOWN) MAX98300 1 2 3 PVDD OUT+ OUT- PGND + 8 A PVDD PGND IN+ B OUT+ N.C. IN- C OUT- SHDN GAIN 7 6 5 MAX98300 EP* + WLP (1.2mm x 1.2mm, 0.4mm pitch) 1 2 IN+ IN- 3 4 SHDN GAIN TDFN (2mm x 2mm) *EP = EXPOSED PAD.
PAGE 8
MAX98300 Mono 2.6W Class D Amplifier Detailed Description Maxim’s patented spread-spectrum modulation mode flattens wideband spectral components, while proprietary techniques ensure that the cycle-to-cycle variation of the switching period does not degrade audio reproduction or efficiency. The MAX98300’s spread-spectrum modulator randomly varies the switching frequency by Q10kHz around the center frequency (300kHz). Above 10MHz, the wideband spectrum looks like noise for EMI purposes (Figure 1).
PAGE 9
MAX98300 Mono 2.6W Class D Amplifier Shutdown The MAX98300 features a low-power shutdown mode, drawing less than 0.1FA of supply current. Drive SHDN low to put the MAX98300 into shutdown. Click-and-Pop Suppression The MAX98300 speaker amplifier features Maxim’s comprehensive click-and-pop suppression. During startup, the click-and-pop suppression circuitry reduces any audible transient sources internal to the device.
PAGE 10
MAX98300 Mono 2.6W Class D Amplifier Functional Diagram 2.6V TO 5.5V 0.1µF 10µF* PVDD 8 (A1) SHDN 3 (C2) UVLO/POWER MANAGEMENT CLICK-AND-POP SUPPRESSION PVDD GAIN 4 (C3) LOW EMI DRIVER 1µF 1µF (B1) 7 OUT+ (C1) 6 OUT- IN+ 1 (A3) PGND CLASS D MODULATOR IN- 2 (B3) PVDD LOW EMI DRIVER MAX98300 PGND 5 (A2) PGND *SYSTEM BULK CAPACITANCE.
PAGE 11
MAX98300 Mono 2.6W Class D Amplifier Package Information For the latest package outline information and land patterns, go to www.maximintegrated.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 to the package regardless of RoHS status. PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 8 TDFN-EP T822+2 21-0168 90-0065 9 WLP W91B1+7 21-0459 — 8L TDFN EXPOSED PADS.
PAGE 12
MAX98300 Mono 2.6W Class D Amplifier Package Information (continued) PACKAGE OUTLINE For the latest package outline information and land patterns, go to www.maximintegrated.com/packages. that a “+”, “#”, or “-” 8L TDFN EXPOSED Note PAD, 2x2x0.80mm in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing 1pertains 21-0168 E 2 to the package regardless of RoHS status. COMMON DIMENSIONS SYMBOL A MIN. MAX. 0.70 0.80 D 1.90 2.10 E 1.90 2.
PAGE 13
MAX98300 Mono 2.6W Class D Amplifier Package Information (continued) For the latest package outline information and land patterns, go to www.maximintegrated.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 to the package regardless of RoHS status.
PAGE 14
MAX98300 Mono 2.6W Class D Amplifier Revision History REVISION NUMBER REVISION DATE 0 7/10 DESCRIPTION Initial release PAGES CHANGED — Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.