MAX98304 Mono 3.2W Class D Amplifier
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Catalog excerpts

MAX98304 Mono 3.2W Class D Amplifier - 1

________________________________________________________________ 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. 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). Active emissions-limiting, edge-rate, and overshoot control circuitry greatly reduces EMI. A filterless spreadspectrum 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 S Spread Spectrum and Active Emissions Limiting S Five Pin-Selectable Gains S 19ìVRMS Ultra-Low Noise S 90dB PSRR S Click-and-Pop Suppression S Thermal and Overcurrent Protection S Low-Current Shutdown Mode S 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 EVALUATION KIT AVAILABLE PART TEMP RANGE PINPACKAGE TOP MARK MAX98304EWL+ -40NC to +85NC 9 WLP AIR 0.47ìF 0.1ìF 0.47ìF +2.5V TO +5.5V IN+ *SYSTEM BULK CAPACITANCE INPVDD +2.5V TO +5.5V PGND SHDN GAIN MAX98304 10ìF* OUT+ OUTWLP TOP VIEW BUMP SIDE DOWN MAX98304 + 1 2 3 WLP (1mm x 1mm x 0.64mm 0.3mm PITCH) TOP VIEW BUMP SIDE DOWN MAX98304 + OUTPGND SHDN IN- IN+ N.C. GAIN OUT+ PVDD 1 2 3 B C A

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MAX98304 Mono 3.2W Class D Amplifier - 3

_______________________________________________________________________________________ 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) Note 1: This device is 100% production tested at +25NC. All temperature limits are guaranteed by design. Note 2: Testing performed with a resistive load in series with an inductor to simulate an...

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MAX98304 Mono 3.2W Class D Amplifier - 4

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.) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY MAX98304 toc04 FREQUENCY (Hz) THD+N (%) 100 1k 10k 0.01 0.1 1 10 0.001 10 100k VPVDD = 5V ZLOAD = 8I + 68ìH POUT = 1.2W POUT = 0.2W TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER MAX98304 toc07 OUTPUT POWER (W)...

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MAX98304 Mono 3.2W Class D Amplifier - 5

_______________________________________________________________________________________ 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 MAX98304 toc10 OUTPUT POWER (W) THD+N (%) 0 0.5 1.0 1.5 0.01 0.1 1 10 100 0.001 2.0 VPVDD = 5V ZLOAD = 8I + 68ìH f = 6000Hz f = 1000Hz f = 100Hz OUTPUT POWER vs. LOAD RESISTANCE MAX98304 toc13 RLOAD (I)...

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MAX98304 Mono 3.2W Class D Amplifier - 6

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.) POWER-SUPPLY REJECTION RATIO vs. SUPPLY VOLTAGEMAX98304 toc22SUPPLY VOLTAGE (V)PSRR (dB)5.04.54.03.53.0-90-80-70-60-50-40-30-20-100-1002.55.5f = 1kHzVRIPPLE = 200mVP-PSTARTUP RESPONSEMAX98304 toc24ISPEAKER100mA/div1ms/divVSHDN2V/divEFFICIENCY vs. OUTPUT...

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MAX98304 Mono 3.2W Class D Amplifier - 7

_______________________________________________________________________________________ 7 MAX98304 Mono 3.2W Class D Amplifier Bump Description Bump Configuration 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.) WLP(1mm x 1mm x 0.64mm0.3mm PITCH)TOP VIEWBUMP SIDE DOWNMAX98304+OUT-PGNDSHDNIN-IN+N.C.GAINPVDDOUT+123BCAWLP(1mm x 1mm x 0.64mm0.3mm PITCH)TOP VIEWBUMP SIDE DOWNMAX98304+OUT-PGNDSHDNIN-IN+N.C.GAINPVDDOUT+123BCAFREQUENCY...

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MAX98304 Mono 3.2W Class D Amplifier - 8

8 _______________________________________________________________________________________ MAX98304 Mono 3.2W Class D Amplifier Detailed Description The MAX98304 features low quiescent current, a low-power shutdown mode, comprehensive click-and-pop suppression, and excellent RF immunity. The device offers Class AB audio performance with Class D efficiency in a minimal board-space solution. The Class D amplifier features spread-spectrum modulation, edge-rate, and overshoot control circuitry that offers significant improvements to switch-mode amplifier radiated emissions. The amplifier...

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MAX98304 Mono 3.2W Class D Amplifier - 9

_______________________________________________________________________________________ 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. When entering shutdown, the differential speaker outputs ramp down to PGND quickly and...

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