Evaluates: MAX98500 19-5221 Rev 0 5/10 MAX98500 Evaluation Kit General Description Features S 2.5V to 5.5V Single-Supply Operation The MAX98500 evaluation kit (EV kit) is a fully assembled and tested circuit board that uses the MAX98500 boost- S Output Power: 2.2W into 8, 10% THD+N ed Class D amplifier to drive a mono bridge-tied-load S Selectable Gain Settings (6dB, 15.5dB, and 20dB) (BTL) speaker in portable audio applications. Designed S Boosted Class D Output to operate from a 2.5V to 5.5V DC power supply, the EV S Differential or Single-Ended Input Signals kit delivers 2.2W into an 8I load. The EV kit accepts differential or single-ended input signals, features three S Boost Converter Shutdown selectable gain settings (6dB, 15.5dB, and 20dB), and S Speaker Output Shutdown provides separate speaker and boost shutdown inputs. S Fully Assembled and Tested Ordering Information PART TYPE MAX98500EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION REQUIRED COMPONENTS 0.22FF Q10%, 25V X7R ceramic capacitors (0603) 10FF Q10%, 6.3V X7R ceramic C14C18 5 Murata GRM188R71E224K capacitor (0805) C1 1 TDK C1608X7R1E224K Murata GRM21BR70J106K TDK C2012X7R0J106K FB1 1 0I resistor (0603) FB2, FB3 0 Not installed, ferrite beads (0603) 22FF Q20%, 16V X5R ceramic capacitor (1206) Phono jack, black (side-entry C2 1 J1 1 Murata GRM31CR61226M PCB mount) Taiyo Yuden EMK316BJ226M JU1, JU2, JU3 3 3-pin headers JU4 1 2-pin header 1FF Q10%, 25V X7R ceramic capacitors (0603) 2.2FH, 34mI, 4.5A inductor C3, C4 2 Murata GRM188R71E105K TOKO FDV0530S-2R2M Murata GRM188R71E105M (5mm x 5mm x 3mm) L1 1 TDK LTF5022T-2R2N3R2-LC 22FF Q10%, 6.3V X5R ceramic (5mm x 5mm x 2.2mm) capacitor (0805) C5 1 NEC MPLC0525L2R2 Murata GRM21BR60J226M (5.2mm x 6.2mm x 2.5mm) TDK C2012X5R0J226K Not installed, inductors 0.1FF Q10%, 16V X7R ceramic L2, L3 0 TOKO A916CY-220M (provided capacitor (0402) C8 1 with EV kit) Murata GRM155R71C104K TDK C1005X7R1C104K OUT-, OUT+, 4 Test points PGND, RKNEE Not installed, ceramic capacitors C9, C10 0 (0402) R1 1 27.4k Q1% resistor (0603) R2, R3 2 22 Q5% resistors (0603) Not installed, ceramic capacitors C12, C13 0 (0603) Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX98500 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION OPTIONAL COMPONENTS Boosted Class D amplifier U1 1 (16 WLP) 22FH Q20%, 0.7A inductors Maxim MAX98500EWE+ L2, L3 2 (D63CB) TOKO A916CY-220M VCCOUT 0 Not installed, test point 4 Shunts PCB: MAX98500 EVALUATION 1 KIT+ Component Suppliers SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com NEC TOKIN America, Inc. 408-324-1790 www.nec-tokinamerica.com TDK Corp. 847-803-6100 www.component.tdk.com TOKO America, Inc. 847-297-0070 www.tokoam.com Note: Indicate that you are using the MAX98500 when contacting these component suppliers. 5) Verify that the audio source output is disabled. Quick Start 6) Connect the mono audio source between the IN+ Recommended Equipment and IN- pads or J1 on the EV kit. 2.5V to 5.5V, 4A DC power supply 7) Connect the speaker across the OUT+ and OUT- 8I speaker test points. Mono audio signal source 8) Enable the power-supply output. Procedure 9) Enable the audio source. The MAX98500 EV kit is fully assembled and test- 10) Verify that the speaker is playing the audio source ed. Follow the steps below to verify board operation. signal. Caution: Do not turn on the power supply until all connections are completed. Detailed Description of Hardware 1) Verify that shunts are installed as follows: The MAX98500 EV kit features the MAX98500 boosted JU1: Open (15.5dB gain) Class D amplifier IC, designed to drive a BTL mono JU2: Pins 1-2 (speaker enabled) speaker in portable audio applications. The EV kit JU3: Pins 1-2 (boost enabled) accepts a differential or single-ended audio input, fea- JU4: Short (single-ended/unbalanced input) tures three selectable gain settings (6dB, 15.5dB, and 20dB), and provides two active-low shutdown inputs for 2) Set the power-supply output to 3.6V. flexibility. The audio input source is amplified to drive 3) Disable the power-supply output. 2.2W into an 8I speaker. The EV kit operates from a 4) Connect the power-supply ground to the PGND pad single DC power supply that provides 2.5V to 5.5V. and the power-supply positive output to the VBAT The EV kit provides two sets of differential outputs. The pad on the EV kit. Keep VBAT lengths < 6in and device outputs (OUT+ and OUT-) can be connected twisted to minimize inductance, to ensure proper directly to a speaker load without any filtering. However, device operation. a filter can be added to ease evaluation. 2 Evaluates: MAX98500