Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Audio amplifier 1-channel (mono) Class D WLP 9 (0.96x0.96)

Mono 3.2W Class D Amplifier

MAX98304

EVALUATION KIT AVAILABLE

General Description

The MAX98304 mono 3.2W 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 filterless spread-

spectrum modulation scheme eliminates the need for

output filtering found in traditional Class D devices. These

features reduce application component count.

The IC's 0.95mA at 3.7V (1.2mA at 5V) quiescent current

extends battery life in portable applications.

The IC is available in a 9-bump (1.0mm x 1.0mm) WLP

with 0.3mm pitch that is specified over the extended

-40NC to +85NC temperature range.

Applications

Notebook and Netbook Computers

Cellular Phones

Tablets

MP3 Players

Portable Audio Players

VoIP Phones

Features

S Low Quiescent Current: 0.95mA at 3.7V

Spread Spectrum and Active Emissions Limiting

Five Pin-Selectable Gains

19µV

RMS

Ultra-Low Noise

90dB PSRR

Click-and-Pop Suppression

Thermal and Overcurrent Protection

Low-Current Shutdown Mode

1.0mm x 1.0mm, 9-Bump WLP (0.3mm Pitch)

Space-Saving Package

19-5519; Rev 0; 9/10

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

Ordering Information

Typical Application Circuit

Bump Configuration

Visit www.maximintegrated.com/products/patents for

product patent marking information.

PART TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX98304EWL+

-40NC to +85NC

9 WLP AIR

0.47µF

0.1µF

0.47µF

+2.5V TO +5.5V

IN+

*SYSTEM BULK CAPACITANCE

IN-

PVDD

+2.5V TO +5.5V

PGND

SHDN

GAIN

MAX98304

10µF*

OUT+

OUT-

WLP

(1mm x 1mm x 0.64mm

0.3mm PITCH)

TOP VIEW

BUMP SIDE DOWN

MAX98304

OUT-

PGND

SHDN

IN- IN+

N.C.

GAIN

PVDDOUT+

12 3

WLP

(1mm x 1mm x 0.64mm

0.3mm PITCH)

TOP VIEW

BUMP SIDE DOWN

MAX98304

OUT-

PGND

SHDN

IN- IN+

N.C.

GAIN

PVDDOUT+

12 3

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 (12 pages)

PAGE 1
EVALUATION KIT AVAILABLE MAX98304 Mono 3.2W Class D Amplifier General Description The MAX98304 mono 3.2W 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). Features S Low Quiescent Current: 0.95mA at 3.
PAGE 2
MAX98304 Mono 3.2W Class D Amplifier ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (TA = +70NC) for Multilayer Board 9-Bump WLP (derate 10.6mW/NC)...............................848mW Junction Temperature......................................................+150NC Operating Temperature Range........................... -40NC to +85NC Storage Temperature Range............................. -65NC to +150NC Soldering Temperature (reflow).......................................
PAGE 3
MAX98304 Mono 3.2W Class D Amplifier ELECTRICAL CHARACTERISTICS (continued) (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB (GAIN = PGND), 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 SYMBOL CONDITIONS VPVDD = 2.5V to 5.
PAGE 4
MAX98304 Mono 3.2W Class D Amplifier Typical Operating Characteristics (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 6dB, RL = J, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.) VPVDD = 4.2V ZLOAD = 4I + 33µH POUT = 1W THD+N (%) 0.1 POUT = 1.5W 0.1 0.01 10 VPVDD = 3.7V ZLOAD = 4I + 33µH 1 THD+N (%) 1 POUT = 2W TOTAL HARMONIC DISTORTION PLUS NOISE vs.
PAGE 5
MAX98304 Mono 3.2W Class D Amplifier Typical Operating Characteristics (continued) (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 6dB, RL = J, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.) TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER f = 1000Hz f = 6000Hz f = 1000Hz 0.1 f = 100Hz 0.5 1.0 1.5 0 2.0 0.3 3.0 THD+N = 10% 2.0 1.5 1.0 1.5 0 THD+N = 10% MAX98304 toc12 3.5 3.0 1.2 THD+N = 10% 2.5 2.0 1.5 THD+N = 1% 1.
PAGE 6
MAX98304 Mono 3.2W Class D Amplifier Typical Operating Characteristics (continued) (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 6dB, RL = J, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.) SUPPLY CURRENT vs. SUPPLY VOLTAGE 1.6 50 40 30 -20 1.4 -30 1.2 -40 1.0 0.8 -50 -60 0.6 -70 20 0.4 -80 10 0.2 -90 0 0 -100 0 0.5 1.0 1.5 2.0 3.0 2.5 OUTPUT POWER (W) 3.5 4.0 4.5 5.0 5.
PAGE 7
MAX98304 Mono 3.2W Class D Amplifier TOP VIEW Typical Operating Characteristics (continued) BUMP SIDE DOWN (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 6dB, RL = J, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.) MAX98304 2 OUT- OUT+ B PGND N.C. C SHDN IN- -40 -80 1 10 f = 1kHz VOUT = -60dBV PVDD -20 -40 GAIN -60 -80 IN+ -100 -120 WLP (1mm x 1mm x 0.64mm 0.3mm PITCH) -140 -100 0.1 IN-BAND vs.
PAGE 8
MAX98304 Mono 3.2W 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 IC’s spread-spectrum modulator randomly varies the switching frequency by Q12.5kHz around the center frequency (300kHz). Above 10MHz, the wideband spectrum looks like noise for EMI purposes (Figure 1).
PAGE 9
MAX98304 Mono 3.2W Class D Amplifier Shutdown The IC features a low-power shutdown mode, drawing less than 0.1FA (typ) of supply current. Drive SHDN low to put the IC into shutdown. Click-and-Pop Suppression The IC 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
MAX98304 Mono 3.2W Class D Amplifier Functional Diagram 2.5V TO 5.5V 0.1µF 10µF* PVDD A3 SHDN C1 UVLO/POWER MANAGEMENT CLICK-AND-POP SUPPRESSION PVDD GAIN B3 0.47µF 0.
PAGE 11
MAX98304 Mono 3.2W 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 TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
PAGE 12
MAX98304 Mono 3.2W Class D Amplifier Revision History REVISION NUMBER REVISION DATE 0 9/10 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.