Evaluates: MAX9730 19-0751 Rev 0 2/07 MAX9730 Evaluation Kit General Description Features The MAX9730 evaluation kit (EV kit) is a fully assembled 5V Single-Supply Operation and tested PCB that uses the MAX9730 Class G power Fully Differential Output amplifier to drive a bridge-tied-load (BTL) speaker in Delivers 2.4W into an 8 Speaker portable audio applications. Designed to operate from a 2.7V to 5.5VDC power supply, the EV kit accepts a Configurable Switching Frequency single-ended or differential input signal. The EV kit pro- Evaluates the MAX9730 in a 28-Pin TQFN (4mm x vides a fully differential output capable of delivering 4mm x 0.8mm) Package 2.4W into an 8 speaker. MAX9730 IC Available in a 20-Bump UCSP (2mm x 2.5mm) Package Fully Assembled and Tested Component List Ordering Information DESIGNATION QTY DESCRIPTION PART TEMP RANGE IC PACKAGE 0.1F 10%, 6.3V X5R ceramic 28 TQFN-EP** MAX9730EVKIT+ 0C to +70C* C1C4 4 capacitors (0402) (4mm x 4mm x 0.8mm) Murata GRM155R60J104K +Denotes a lead-free and RoHS-compliant EV kit. 1F 10%, 6.3V X5R ceramic *This limited temperature range is for the EV kit PCB only. The C5, C6 2 capacitors (0402) MAX9730 IC temperature range is -40C to +85C. Murata GRM155R60J105K **EP = Exposed paddle. 4.7F 10%, 6.3V X5R ceramic Quick Start C7 1 capacitor (1206) Murata GRM31CR60J475K Recommended Equipment 10F 20%, 6.3V X5R ceramic 5V, 2A power supply C8, C9, C10 3 capacitors (0603) Audio source (i.e., CD player, MP3 player, etc.) Murata GRM188R60J106M One 8 speaker JU1 1 3-pin header 10k 0.5% precision-thick Procedure R1R4 4 film-chip resistors (0603) The MAX9730 EV kit is fully assembled and tested. Panasonic ERJ3RBD1002V Follow the steps listed below to verify board operation. Caution: Do not turn on the power supply until all R5 1 100k 1% resistor (0603) connections are completed. MAX9730ETI+ (28-pin TQFN, 4mm U1 1 1) Install a shunt across pins 1-2 of jumper JU1 (EV kit ON). x 4mm x 0.8mm) 2) Connect the 8 speaker across the OUT- and 1 Shunt OUT+ pads. 1 PCB: MAX9730 evaluation kit 3) Connect the ground terminal of the power supply to the GND pad and the positive terminal to the VCC pad. 4) Connect the positive terminal of the audio source to Component Suppliers the IN+ pad. SUPPLIER PHONE WEBSITE 5) Connect the negative terminal of the audio source Murata Mfg. Co., Ltd. 770-436-1300 www.murata.com to the IN- pad. Connect the IN- pad to the GND pad if the audio source is single-ended. Panasonic Corp. 714-373-7366 www.panasonic.com 6) Connect the ground terminal of the audio source to Note: Indicate that you are using the MAX9730 when contacting these component suppliers. the GND pad. 7) Turn on the audio source. 8) Turn on the power supply. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX9730 Evaluation Kit Jumper Selection Detailed Description Shutdown Mode (SHDN) The MAX9730 EV kit features the MAX9730 Class G Jumper JU1 controls the shutdown pin (SHDN) of the power amplifier IC, designed to drive a dynamic speak- MAX9730 IC. The shutdown pin can also be controlled er in BTL configuration. The EV kit operates from a DC by an external logic controller connected to the EV kit power supply that provides 2.7V to 5.5V and 2A of cur- SHDN pad. Remove the shunt from jumper JU1 before rent. The EV kit accepts single-ended or differential connecting an external controller to the SHDN pad. See audio input and provides a fully differential output. The Table 1 for shunt positions. audio input source is amplified to drive 2.4W into an 8 speaker with a 5V power supply. Table 1. JU1 Jumper Selection Customizing the Gain (Shutdown Mode) The MAX9730 EV kit is shipped with a gain of +12dB and is set by resistors R1R4. Change resistors R1R4 to SHUNT SHDN PIN EV KIT FUNCTION reconfigure the gain of the EV kit. Refer to the MAX9730 POSITION CONNECTED TO IC data sheet for more detail. 1-2* VDD EV kit enabled 2-3 GND Shutdown mode Charge-Pump Frequency Set Resistor The charge-pump frequency is set by resistor R5. The SHDN driven by external charge pumps normal operation frequency is 330kHz. External logic logic controller. Shutdown is None Change R5 to change the charge-pump frequency. controller active-low and is 1.8V logic Refer to the MAX9730 IC data sheet for more information. compliant. *Default position. 2 Evaluates: MAX9730