19-5919; Rev 1; 8/11 TION KIT EVALUA BLE IL AVA A Stereo 3.7W Class D Amplifier Features 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). S Output Power 3.7W at 3I, 10% THD, 1.7W at 8I, 10% THD, with 5V Supply S Passes EMI Limit Unfiltered with Up to 12in of Speaker Cable S High 83dB PSRR at 217Hz Active emissions limiting, edge-rate, and overshoot control circuitry combined with a filterless spread-spectrum modulation scheme (SSM) provide excellent EMI performance while eliminating the need for output filtering found in traditional Class D devices. These features reduce application component count. S Spread-Spectrum Modulation and Active Emissions Limiting SFive Pin-Selectable Gains SExcellent Click-and-Pop Suppression SThermal and Overcurrent Protection The IC's 2.0mA quiescent current with a 3.7V supply extends battery life in portable applications. SLow-Current Shutdown Mode SSpace-Saving, 3mm x 3mm x 0.75mm, 14-Pin TDFN 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. Ordering Information Applications Smartphones MP3 Players Tablets Portable Audio Players Cellular Phones VoIP Phones PART TEMP RANGE PINPACKAGE TOP MARK MAX98306ETD+ -40NC to +85NC 14 TDFN +AEV +Denotes a lead(Pb)-free/RoHS-compliant package. Accessory Speakers Typical Application Circuit +2.6V TO +5.5V 0.1µF 1µF 1µF INL+ PVDD INL- 10µF OUTL+ OUTL- PVDD GAIN 1µF 1µF GAIN CONTROL INR+ OUTR+ INR- OUTR- PVDD MAX98306 SHDN PGND ________________________________________________________________ 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. MAX98306 General Description MAX98306 Stereo 3.7W Class D Amplifier ABSOLUTE MAXIMUM RATINGS Voltage PVDD to PGND.....................................................-0.3V to +6V OUTL+, OUTR+, OUTL-, OUTRto PGND............................................-0.3V to (VPVDD + 0.3V) All Other Pins to PGND........................................-0.3V to +6V Current Continuous Current Into/Out of PVDD, PGND, OUTL+, OUTR+, OUTL-, OUTR-............................... ±800mA Continuous Input Current (all other pins)..................... ±20mA Duration of Short Circuit OUTL+, OUTR+, OUTL-, OUTR- to PGND or PVDD.....Continuous OUTL+ to OUTL- or OUTR+ to OUTR-....................Continuous Continuous Power Dissipation for a MultiLayer Board (TA = +70°C) TDFN (deration 24.4mW/°C above +70°C)................1951.2mW Junction Temperature .....................................................+150°C Operating Temperature Range . ........................ -40°C to +85°C Storage Temperature Range ........................... -65°C to +150°C Lead Temperature (10s, soldering) ................................+300°C Soldering Temperature (reflow).......................................+260°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. PACKAGE THERMAL CHARACTERISTICS (Note 1) Junction-to-Ambient Thermal Resistance (qJA)...............41°C/W Junction-to-Case Thermal Resistance (qJA)......................8°C/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. ELECTRICAL CHARACTERISTICS (VPVDD = VSHDN = 3.7V, VPGND = 0V, AV = 12dB (GAIN = PVDD), RL = J, RL connected between OUT_+ to OUT_-, 20Hz to 22kHz AC measurement bandwidth, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS GENERAL Supply Voltage Range VPVDD Undervoltage Lockout UVLO Quiescent Supply Current IPVDD Shutdown Supply Current ISHDN Turn On Time tON Bias Voltage VBIAS Voltage Gain AV Guaranteed by PSRR test 2.6 5.5 V 1.8 2.3 V VPVDD = 3.7V 2 2.7 VPVDD = 5.0V 2.6 VSHDN = 0, TA = +25NC <1 10 FA 3.2 10 ms VPVDD/2 2.15 V 1.62 GAIN = PGND 17.5 18 18.5 GAIN = 100kI to PGND 14.5 15 15.5 GAIN = PVDD 11.5 12 12.5 GAIN = 100kI to PVDD 8.5 9 9.5 GAIN = unconnected 5.5 6 6.5 Channel-to-Channel Gain Tracking Input Resistance Common-Mode Rejection Ratio Output Offset Voltage 0.1 RIN CMRR VOS AV = 18dB (GAIN = PGND) 22 33 AV = 15Db (GAIN = 100kI to PGND) 31 46 AV = 12dB (GAIN = PVDD) 44 65 AV = 9dB (GAIN = 100kI to PVDD) 62 93 AV = 6dB (GAIN = unconnected) 89 131 fIN = 1kHz, input referred 79 TA = +25NC (Note 3) ±1 2 _______________________________________________________________________________________ mA dB % kI dB ±3 mV Stereo 3.7W Class D Amplifier (VPVDD = VSHDN = 3.7V, VPGND = 0V, AV = 12dB (GAIN = PVDD), RL = J, RL connected between OUT_+ to OUT_-, 20Hz to 22kHz AC measurement bandwidth, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER Click-and-Pop Level SYMBOL CONDITIONS KCP Peak voltage, TA = +25NC Into shutdown A-weighted, 32 samples Out of shutdown per second (Notes 3, 4) VPVDD = 2.6V to 5.5V, TA = +25NC Power-Supply Rejection Ratio PSRR TA = +25NC (Note 3) THD+N = 10% Output Power POUT THD+N = 1% Total Harmonic Distortion Plus Noise Output Noise THD+N fIN = 1kHz TA = +25NC MIN TYP UNITS dBV -73 70 95 f = 217Hz, 200mVP-P ripple 83 f = 1kHz, 200mVP-P ripple 83 f = 10kHz, 200mVP-P ripple 77 ZSPK = 3I + 22FH, VPVDD = 5.0V 3.7 ZSPK = 4I + 33FH, VPVDD = 5.0V 3 ZSPK = 8I + 68FH, VPVDD = 5.0V 1.7 ZSPK = 8I + 68FH, VPVDD = 3.7V 0.9 ZSPK = 3I + 22FH, VPVDD = 5.0V 2.9 ZSPK = 4I + 33FH, VPVDD = 5.0V 2.4 ZSPK = 8I +68FH VPVDD = 5.0V 1.4 ZSPK = 8I +68FH VPVDD = 3.7V 0.75 ZSPK = 3I +22FH, POUT = 1.6W, PVDD = 5.0V 0.05 ZSPK = 4I +33FH, POUT = 650mW, PVDD = 3.7V 0.05 ZSPK = 4I +33FH, POUT = 1.3W, VPVDD = 5.0V 0.04 ZSPK = 8I +68FH, POUT = 725mW, PVDD = 5.0V 0.03 A-weighted (Note 3) MAX -79 dB W 0.75 % 29 FVRMS _______________________________________________________________________________________ 3 MAX98306 ELECTRICAL CHARACTERISTICS (continued) ELECTRICAL CHARACTERISTICS (continued) (VPVDD = VSHDN = 3.7V, VPGND = 0V, AV = 12dB (GAIN = PVDD), RL = J, RL connected between OUT_+ to OUT_-, 20Hz to 22kHz AC measurement bandwidth, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER SYMBOL Signal-to-Noise Ratio Efficiency SNR E Oscillator Frequency fOSC CONDITIONS MIN TYP ZSPK = 8I +68FH, POUT at 1% THD+N 99 ZSPK = 8I +68FH, POUT = 1.4W, f = 1kHz 92 160 MAX UNITS dB % 320 Spread-Spectrum Bandwidth 540 kHz 20 Current Limit TA = +25NC Thermal-Shutdown Level kHz 3 A +150 NC 20 NC Thermal Hysteresis DIGITAL INPUT (SHDN) Input-Voltage High VIH Input-Voltage Low VIL 1.4 Input Leakage Current V TA = +25NC, SHDN = 0 0.4 V ±1 FA Note 2: This device is 100% production tested at TA = +25NC. All temperature limits are guaranteed by design. Note 3: Amplifier inputs AC-coupled to ground. Note 4: Specified at room temperature with an 8I resistive load in series with a 68µH inductive load. Typical Operating Characteristics (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB, RL = J, RL connected between OUT_+ to OUT_-, 20Hz to 22kHz AC measurement bandwidth, TA = +25NC, unless otherwise noted.) 10 10 THD+N (%) f = 6kHz 1 f = 1kHz 0.1 0.01 VPVDD = 5V ZLOAD = 8I + 68µH f = 6kHz 1 f = 1kHz 0.1 0.001 0 0.25 0.50 OUTPUT POWER (W) f = 100kHz 0.001 0.75 1.00 f = 6kHz 1 0.1 0.01 0.01 f = 100kHz VPVDD = 5V ZLOAD = 4I + 33µH 10 THD+N (%) MAX98306 toc01 VPVDD = 3.7V ZLOAD = 8I + 68µH THD+N vs. OUTPUT POWER 100 0 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 OUTPUT POWER (W) MAX98306 toc03 THD+N vs. OUTPUT POWER 100 MAX98306 toc02 THD+N vs. OUTPUT POWER 100 THD+N (%) MAX98306 Stereo 3.7W Class D Amplifier f = 1kHz f = 100kHz 0.001 0 0.5 1.0 1.5 2.0 2.5 OUTPUT POWER (W) 4 _______________________________________________________________________________________ 3.0 3.5 Stereo 3.7W Class D Amplifier THD+N vs. FREQUENCY VPVDD = 5V ZLOAD = 3I + 22µH 10 THD+N vs. FREQUENCY 10 MAX98306 toc05 MAX98306 toc04 10 VPVDD = 3.7V ZLOAD = 8I + 68µH 1 MAX98306 toc06 THD+N vs. OUTPUT POWER 100 VPVDD = 5V ZLOAD = 8I + 68µH 1 0.1 700mW 0.1 1.3W 0.1 200mW 0.01 f = 1kHz 0.001 0.001 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0.001 10 100 OUTPUT POWER (W) 10 MAX98306 toc07 10 100 2W 200mW 10k 100k OUTPUT POWER vs. LOAD RESISTANCE VPVDD = 5V ZLOAD = 3I + 22µH 2.5W 0.1 500mW 0.01 1k FREQUENCY (Hz) 1 THD+N (%) 1 0.01 100k THD+N vs. FREQUENCY VPVDD = 5V ZLOAD = 4I + 33µH 0.1 10k FREQUENCY (Hz) THD+N vs. FREQUENCY 10 1k 2.0 VPVDD = 3.7V f = 1kHz 1.8 1.6 OUTPUT POWER (W) 0.5 MAX98306 toc08 0 200mW 0.01 f = 100kHz MAX98306 toc09 0.01 THD+N (%) THD+N (%) 1 THD+N (%) THD+N (%) f = 6kHz 1.4 1.2 1.0 THD+N = 10% 0.8 0.6 THD+N = 1% 0.4 0.2 0.001 1k 10k 100k 10 100 FREQUENCY (Hz) 2.5 2.0 THD+N = 10% 1.5 1 10 THD+N = 1% 1.0 f = 1kHz ZLOAD = 8I + 68µH 2.0 OUTPUT POWER vs. SUPPLY VOLTAGE THD+N = 10% 1.5 1.0 4.0 f = 1kHz ZLOAD = 4I + 33µH 3.5 3.0 THD+N = 10% 2.5 2.0 1.5 THD+N = 1% 1.0 THD+N = 1% 0.5 1000 100 RLOAD (I) OUTPUT POWER vs. SUPPLY VOLTAGE OUTPUT POWER (W) OUTPUT POWER (W) 3.0 0 100k 2.5 MAX98306 toc10 VPVDD = 5V f = 1kHz 3.5 10k FREQUENCY (Hz) OUTPUT POWER vs. LOAD RESISTANCE 4.0 1k OUTPUT POWER (W) 100 MAX98306 toc11 10 0.5 MAX98306 toc12 0.001 0.5 0 1 10 100 RLOAD (I) 1000 0 0 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) 5.0 5.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 5 MAX98306 Typical Operating Characteristics (continued) (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB, RL = J, RL connected between OUT_+ to OUT_-, 20Hz to 22kHz AC measurement bandwidth, TA = +25NC, unless otherwise noted.) Typical Operating Characteristics (continued) (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB, RL = J, RL connected between OUT_+ to OUT_-, 20Hz to 22kHz AC measurement bandwidth, TA = +25NC, unless otherwise noted.) GAIN vs. FREQUENCY 2.5 2.0 0 -10 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) ZLOAD = 4I + 33µH 40 30 20 VPVDD = 5.0V 1.0 1.5 2.0 2.5 3.0 3.5 MAX98306 toc17 3.0 2.5 2.0 1.5 3.0 3.5 4.0 4.5 5.0 COMMON-MODE REJECTION RATIO vs. FREQUENCY POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 90 PSRR (dB) 60 50 40 20 20 10 10 VRIPPLE = 200mVP-P VPVDD = 3.7V ZLOAD = 8I + 68µH 10 100 1k FREQUENCY (Hz) 10k 100k 10 100 10k 100k 20 0 -20 -40 -60 -80 0 0 1k WIDEBAND vs. FREQUENCY 40 30 100 FREQUENCY (Hz) 50 30 10 AMPLITUDE (dBV) 80 70 -80 5.5 MAX98306 toc20 100 60 LEFT TO RIGHT -140 2.5 70 -60 RIGHT TO LEFT SUPPLY VOLTAGE (V) 80 -40 -120 OUTPUT POWER (W) VPVDD = 3.7V 2.0 -100 1.0 4.0 MAX98306 toc19 90 0.5 1.5 -20 0 0 1.0 CROSSTALK vs. FREQUENCY 0.5 0 0.5 0 CROSSTALK (dB) ZLOAD = 3I + 22µH 10 0 OUTPUT POWER (W) 3.5 SUPPLY CURRENT (mA) EFFICIENCY (%) 80 50 100k 4.0 MAX98306 toc16 90 60 10k SUPPLY CURRENT vs. SUPPLY VOLTAGE EFFICIENCY vs. OUTPUT POWER ZLOAD = 8I + 68µH 1k FREQUENCY (Hz) 100 70 VPVDD = 3.7V 0 100 10 5.5 40 MAX98306 toc18 2.5 ZLOAD = 3I + 22µH ZLOAD = 4I + 33µH 50 10 -40 0 ZLOAD = 8I + 68µH 60 20 -30 0.5 70 30 -20 THD+N = 1% 1.0 100 80 10 MAX98306 toc21 1.5 90 EFFICIENCY (%) THD+N = 10% 3.0 20 AMPLITUDE (dB) 3.5 100 MAX98306 toc14 4.0 OUTPUT POWER (W) MAX98306 toc13 f = 1kHz ZLOAD = 3I + 22µH 4.5 EFFICIENCY vs. OUTPUT POWER 30 MAX98306 toc15 OUTPUT POWER vs. SUPPLY VOLTAGE 5.0 CMRR (dB) MAX98306 Stereo 3.7W Class D Amplifier 1k FREQUENCY (Hz) 10k 100k -100 0.1 1 10 FREQUENCY (MHz) 6 _______________________________________________________________________________________ 100 Stereo 3.7W Class D Amplifier STARTUP RESPONSE IN-BAND vs. FREQUENCY MAX98306 toc22 0 AMPLITUDE (dB) -20 SHUTDOWN RESPONSE MAX98306 toc23 MAX98306 toc24 SHDN 2V/div -40 -60 SHDN 2V/div OUTL OUTL OUTR OUTR -80 -100 -120 -140 10 100 1k FREQUENCY (Hz) 10k 100k TIME (1ms/div) TIME (1ms/div) _______________________________________________________________________________________ 7 MAX98306 Typical Operating Characteristics (continued) (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 12dB, RL = J, RL connected between OUT_+ to OUT_-, 20Hz to 22kHz AC measurement bandwidth, TA = +25NC, unless otherwise noted.) Stereo 3.7W Class D Amplifier MAX98306 Pin Configuration OUTL- OUTL+ PVDD PVDD OUTR+ OUTR- PGND TOP VIEW 14 13 12 11 10 9 8 MAX98306 EP INL+ 5 6 7 INR+ SHDN 4 INR- 3 GAIN 2 INL- 1 PGND + TDFN Pin Description PIN NAME 1, 8 PGND Ground FUNCTION 2 SHDN Active-Low Shutdown Input. Drive SHDN to PGND to place the device into shutdown. Drive SHDN above 1.4V for normal operation. 3 INL+ Noninverting Audio Left Input 4 INL- Inverting Audio Left Input 5 GAIN Gain Select 6 INR- Inverting Audio Right Input 7 INR+ Noninverting Audio Right Input 9 OUTR- Negative Right Speaker Output 10 OUTR+ Positive Right Speaker Output 11, 12 PVDD 13 OUTL+ Positive Left Speaker Output 14 OUTL- Negative Left Speaker Output — EP Power Supply. Bypass PVDD to PGND with a 0.1FF capacitor in parallel with a 10FF capacitor placed as close as possible to the device. Exposed Pad. Connect the exposed pad directly to ground. 8 _______________________________________________________________________________________ Stereo 3.7W Class D Amplifier The MAX98306 features low quiescent current, a lowpower shutdown mode, comprehensive click-and-pop suppression, and excellent RF immunity. The IC offers Class AB audio performance with Class D efficiency in a minimal board-space solution. The Class D amplifier features spread-spectrum modulation, active emissions limiting, edge-rate, and overshoot control circuitry that offers significant improvements to switch-mode amplifier radiated emissions. Table 1. Gain Control Configuration GAIN PIN 18 Connect to PGND through 100kI ±5% resistor 15 Connect to PVDD 12 Connect to PVDD through 100kI ±5% resistor 9 Unconnected 6 The amplifier also features click-and-pop suppression that reduces audible transients on startup and shutdown, as well as thermal-overload and short-circuit protection. The filterless Class D amplifier output stage offers much higher efficiency than Class AB amplifiers. The high efficiency of a Class D amplifier is due to the pulse-width modulated (PWM) rail-to-rail switching operation of the output stage transistors. This ensures that any power loss associated with the Class D output stage is mostly due to the I2R loss of the MOSFET on-resistance and quiescent current overhead. 90 80 EMISSIONS LEVEL (dBµV/m) Class D Speaker Amplifier MAXIMUM GAIN (dB) Connect to PGND 70 60 50 40 30 20 10 0 -10 0 100 200 300 400 500 600 700 800 900 1000 EMI Filterless Output Stage Traditional Class D amplifiers require the use of external LC filters, or shielding, to meet EN55022B electromagnetic-interference (EMI) regulation standards. Maxim’s active-emissions-limiting edge-rate control circuitry and spread-spectrum modulation reduce EMI emissions, while maintaining up to 92% efficiency. Figure 1. EMI with 12in of Speaker Cable and No Output Filter Spread-spectrum modulation and active emissions limiting limit 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 Q20kHz around the center frequency (320kHz). Above 10MHz, the wideband spectrum looks like noise for EMI purposes (Figure 1). 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. Speaker Current Limit If the output current of the speaker amplifier exceeds the current limit (3A typ), the IC disables the outputs for approximately 100Fs. At the end of 100Fs, the outputs are reenabled. If the fault condition still exists, the IC continues to disable and reenable the outputs until the fault condition is removed. FREQUENCY (MHz) Selectable Gain The IC offers five programmable gains selected using the GAIN input. 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 simultaneously. _______________________________________________________________________________________ 9 MAX98306 Detailed Description MAX98306 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 performance. The IC’s filterless modulation scheme does not require an output filter. Because the switching frequency of the IC is well beyond the bandwidth of most speakers, voice coil movement due to the switching frequency is very small. Use a speaker with a series inductance > 10FH. Typical 8I speakers exhibit series inductances in the 20FH to 100FH range. Component Selection Power-Supply Input (PVDD) PVDD powers the speaker amplifier. PVDD ranges from 2.6V to 5.5V. Bypass PVDD with 0.1FF and 10FF capacitors to PGND. Apply additional bulk capacitance at the device if long input traces between PVDD and the power source are used. Input Filtering The input-coupling capacitor (CIN), in conjunction with the amplifier’s internal input resistance (RIN), forms a highpass filter that removes the DC bias from the incoming signal. These capacitors allow the amplifier to bias the signal to an optimum DC level. Assuming zero source impedance, CIN is: CIN = 1 Table 2. Capacitance Value for 20Hz Highpass Filter GAIN RIN (kI) CIN for 20Hz (nF) 18 33 241 15 46 173 12 65 122 9 93 86 6 131 61 Layout and Grounding Proper layout and grounding are essential for optimum performance. Good grounding improves audio performance and prevents switching noise from coupling into the audio signal. Use wide, low-resistance output traces. As the load impedance decreases, the current drawn from the device increases. At higher current, the resistance of the output traces decrease the power delivered to the load. For example, if 2W is delivered from the device output to a 4I load through 100mI of total speaker trace, 1.904W is delivered to the speaker. If power is delivered through 10mI of total speaker trace, 1.99W is delivered to the speaker. Wide output, supply, and ground traces also improve the power dissipation of the device. The IC is inherently designed for excellent RF immunity. For best performance, add ground fills around all signal traces on top or bottom PCB planes. 2π f −3dB × RIN where f-3dB is the -3dB corner frequency and RIN is the typical value as specified in the Electrical Characteristics table. Use capacitors with adequately low-voltage coefficients for best low-frequency THD performance. Table 2 shows calculated capacitance values based on a 20Hz highpass filter. Chip Information PROCESS: CMOS 10 ������������������������������������������������������������������������������������� Stereo 3.7W Class D Amplifier 2.6V TO 5.5V 0.1µF 10µF PVDD 11, 12 PVDD PVDD SHDN 2 UVLO/POWER MANAGEMENT CLICK-AND-POP SUPPRESSION LOW-EMI DRIVER 13 OUTL+ 14 OUTL- 10 OUTR+ 9 OUTR- INL+ 3 PGND MODULATOR (FIXED GAIN 2x) INL- 4 PVDD LOW-EMI DRIVER 1ST INTEGRATOR 2ND INTEGRATOR PGND PVDD GAIN SELECTION GAIN 5 MAX98306 GAIN CONTROL 1ST INTEGRATOR 2ND INTEGRATOR PVDD GAIN SELECTION LOW-EMI DRIVER INR+ 7 INR- 6 PGND MODULATOR (FIXED GAIN 2x) PVDD LOW-EMI DRIVER PGND 1, 8 PGND ______________________________________________________________________________________ 11 MAX98306 Block Diagram MAX98306 Stereo 3.7W Class D Amplifier Package Information For the latest package outline information and land patterns (footprints), go to 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 to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 14 TDFN T1433+2 21-0137 90-0063 COMMON DIMENSIONS PACKAGE VARIATIONS MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b A 0.70 0.80 T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF D 2.90 3.10 T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF E 2.90 3.10 T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF L 0.20 0.40 2.00 REF SYMBOL [(N/2)-1] x e 12 ������������������������������������������������������������������������������������� T1033-1 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF A1 0.00 0.05 T1033MK-1 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 k 0.25 MIN. T1033-2 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF A2 0.20 REF. T1433-1 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF Stereo 3.7W Class D Amplifier COMMON DIMENSIONS PACKAGE VARIATIONS MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b A 0.70 0.80 T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF D 2.90 3.10 T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF E 2.90 3.10 T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF 2.00 REF SYMBOL A1 0.00 0.05 T1033-1 L 0.20 0.40 [(N/2)-1] x e T1033MK-1 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 k 0.25 MIN. T1033-2 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF A2 0.20 REF. T1433-1 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF T1433-2 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF T1433-3F 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF ______________________________________________________________________________________ 13 MAX98306 Package Information (continued) For the latest package outline information and land patterns (footprints), go to 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 to the package regardless of RoHS status. MAX98306 Stereo 3.7W Class D Amplifier Revision History REVISION NUMBER REVISION DATE 0 6/11 Initial release — 1 8/11 Updated output power in Electrical Characteristics 3 DESCRIPTION PAGES CHANGED Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 © 2011 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.