Evaluates: MAX9737 19-4404 Rev 0 12/08 MAX9737 Evaluation Kit General Description Features The MAX9737 evaluation kit (EV kit) is a fully assembled 8V to 28V Single DC Power-Supply Operation and tested PCB that configures the MAX9737 mono 7W Differential Outputs Class D amplifier to drive an 8 speaker for audio applications. The EV kit operates from an 8V to 28V DC Configured for +13.6dB Gain power supply and is configured for +13.6dB gain. The External Gain-Setting Resistors MAX9737 EV kit accepts a single-ended input signal and provides differential outputs for the speaker. Class D Output Filter for Ease of Evaluation Delivers 7W into an 8 Speaker Mute Control Lead(Pb)-Free and RoHS Compliant Fully Assembled and Tested Ordering Information PART TYPE MAX9737EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 1F 10%, 50V X7R ceramic 100F 20%, 50V aluminum capacitors (0805) electrolytic capacitor (8mm x C1C4 4 Murata GRM21BR71H105K C17 1 11.5mm) TDK C2012X7R1H105K Panasonic EEUFM1H101 SANYO 50ME100CA 0.1F 10%, 50V X7R ceramic 4.3V, 20mA zener diode (SOT23) capacitor (0603) C5 1 D1 1 Central Semi CMPZ5229B Murata GRM188R71H104K (Top Mark: C8D) TDK C1608X7R1H104K Ferrite bead, 22 at 100MHz, 0.47F 10%, 25V X7R ceramic FB1 1 10m DCR, 6A (0805) capacitor (0603) C6 1 Murata BLM21PG220SN1D Murata GRM188R71E474K Binding posts TDK C1608X7R1E474K FOUT+, FOUT-, 4 Johnson 111-2223-001 1F 10%, 10V X7R ceramic PGND, VDD Mouser 530-111-2223-001 capacitors (0603) C7, C8, C9, C18 4 Phono jack, side entry, PCB Murata GRM188R61A105K IN 1 mount (white) TDK C1608X7R1A105K CUI Inc. RCJ-043 C10, C11 0 Not installed, capacitors (0603) JU1 1 2-pin header 0.15F 10%, 50V X7R ceramic JU2 1 3-pin header capacitors (0805) C12C16 5 15H 20%, 3.1A inductors Murata GRM21BR71H154K L1, L2 2 Sumida CDRH104RNP-150NC TDK C2012X7R1H154K 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.MAX9737 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION R8 1 100k 5% resistor (0603) PCB mini test points, 20mA OUT+, OUT-, PC 3 Keystone 5000 Mono 7W Class D amplifier U1 1 (24 TQFN-EP*) R1, R2 2 20k 1% resistors (0603) Maxim MAX9737ETJ+ R3, R4 2 0 5% resistors (0805) 1 PCB: MAX9737 Evaluation Kit+ R5, R6 2 15 5% resistors (1206) *EP = Exposed pad. R7 1 10k 5% resistor (0603) Component Suppliers SUPPLIER PHONE WEBSITE Central Semiconductor Corp. 631-435-1110 www.centralsemi.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Panasonic Corp. 800-344-2112 www.panasonic.com SANYO Electric Co., Ltd. 619-661-6835 www.sanyodevice.com Sumida Corp. 847-545-6700 www.sumida.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX9737 when contacting these component suppliers. 5) Connect the output terminal of the audio source to Quick Start the IN RCA phono jack. Recommended Equipment 6) Turn on the audio source at minimum volume. Before beginning, the following equipment is needed: 7) Turn on the power supply. 8V to 28V, 5A DC power supply 8) Gradually increase the audio source volume until Audio source with volume control (e.g., CD player, audio is heard through the loud speaker. etc.) Detailed Description of Hardware 8 speaker Gain-Setting Resistors Procedure The MAX9737 EV kit features adjustable gain setting The MAX9737 EV kit is fully assembled and tested. through external resistors R1 and R2. The output stage Follow the steps below to verify board operation. provides a fixed internal gain in addition to the external- Caution: Do not turn on the power supply until all ly set input stage gain. The fixed output stage gain is connections are completed. set at +13.6dB (4.8V/V). Set overall gain by using resis- 1) Install a shunt across pins 1-2 of jumper JU2 tors R1 and R2 as follows: (DVDD = 5V). 2) Install a shunt across jumper JU1 (MUTE = high, R2 A = 48. VV V output enabled). R1 3) Connect a speaker across the FOUT+ and FOUT- where A is the desired voltage gain. Choose R2 V PCB binding posts. between 10k and 50k. Choose R1 using the follow- 4) Connect the positive terminal of the power supply ing equation: to the VDD binding post and the power-supply ground terminal to the PGND binding post. 48. R2 R1= A V 2 Evaluates: MAX9737