19-2503; Rev 0; 7/02 MAX4364 Evaluation Kit Features ♦ 2.7V to 5.5V Single-Supply Operation ♦ Drives 1.4W into an 8Ω Speaker ♦ 0.04% THD + N at 1kHz ♦ Externally Adjustable Gain ♦ Clickless/Popless Power-Up/Down, Shutdown ♦ 10nA Shutdown Current ♦ Small 8-Pin SO Package ♦ Fully Assembled and Tested Component List DESIGNATION QTY DESCRIPTION Ordering Information PART TEMP RANGE IC PACKAGE MAX4364EVKIT 0°C to +70°C 8 SO C1 1 0.1µF ±10%, 16V X7R ceramic capacitor (0603) Taiyo Yuden EMK107BJ104KA C2 1 10µF ±20%, 6.3V X5R ceramic capacitor (1206) Taiyo Yuden JMK316BJ106ML Quick Start C3 1 1.0µF ±10%, 6.3V X5R ceramic capacitor (0603) Taiyo Yuden JMK107BJ105KA The MAX4364 EV kit is fully assembled and tested. Follow the steps listed below to verify board operation. Do not turn on the power supply until all connections are completed. C4 1 0.47µF, 35V tantalum capacitor (case B) Kemet T491B474K035AS C5 0 Not installed (0603) IN 1 Right-angle phono jack (red) JU1 1 2-pin header R1, R2, R3 3 20kΩ ±1% resistors (0805) R4 1 100kΩ ±5% resistor (0805) None 1 Shunt (JU1) None 1 MAX4364 PC board None 1 MAX4364 data sheet None 1 MAX4364 EV kit data sheet U1 1 MAX4364ESA (8-pin SO) Recommended Equipment • 5V, 1A power supply • 8Ω speaker • Audio source (e.g., CD player, tape player) Setup 1) Verify that jumper JU1 (SHDN) does not have a shunt installed. 2) Connect the 8Ω speaker across the OUT+ and OUTpads. 3) Connect an audio source to Jack J1 (IN). 4) Connect the 5V terminal of the power supply to the VCC pad and the ground terminal of the power supply to the GND pad. 5) Turn on the power supply. 6) Turn on the audio source. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluates: MAX4364 General Description The MAX4364 evaluation kit (EV kit) is a fully assembled and tested circuit board that uses the MAX4364 highpower bridged amplifier to drive loudspeakers in portable audio applications. Designed to operate from a 2.7VDC to 5.5VDC power supply, the MAX4364 EV kit is capable of delivering 1.4W into an 8Ω load. Evaluates: MAX4364 MAX4364 Evaluation Kit Component Suppliers SUPPLIER PHONE FAX WEBSITE Kemet 864-963-6300 864-963-6322 www.kemet.com Taiyo Yuden 800-348-2496 847-925-0899 www.t-yuden.com Note: Please indicate that you are using the MAX4364 when contacting these component suppliers. Detailed Description The MAX4364 EV kit contains the MAX4364 high-power bridged amplifier, designed to drive loudspeakers in portable audio applications. The MAX4364 EV kit operates from a DC power supply that can provide 2.7V to 5.5V and 1A of current. The MAX4364 EV kit can accept audio source inputs (IN) with peak-to-peak amplitudes up to VCC. The audio source is amplified to drive 1.4W into an 8Ω speaker. Table 1. JU1 Jumper Selection JUMPER JU1 The MAX4364 EV kit has positive and negative differential outputs that are 180° out of phase and are DC offset to VCC/2. This allows the voltage at the load to see a peak voltage of almost VCC. The closed-loop gain of the MAX4364 EV kit is configured for 2V/V, but can be reconfigured to other gains. Refer to the Gain-Setting Resistors section of the MAX4364/MAX4365 data sheet. However, if the closed-loop gain is reconfigured to greater than 10, a feedback capacitor, C5, can be added to limit the bandwidth, or to compensate for stray capacitance at the inverting input. SHUNT POSITION Installed (SHDN = high) Shutdown mode None (SHDN = low) EV kit enabled None. External controller connected to SHDN pad (TTL/CMOS input). SHDN driven by external controller. Shutdown is active high. VCC VCC JU1 SHDN 1 ISUPPLY = IRES + IMAX 4364 IRES = VCC / R1 2 SHDN VCC C1 0.1µF 2 C3 1µF 1 JU2 IN R4 100kΩ GND 3 4 C2 10µF GND 7 U1 MAX4364 2 1 BIAS 2 C4 0.47µF 35V VCC 6 R1 20kΩ Jumper Selection Shutdown Jumper JU1 controls the shutdown pin (SHDN) of the MAX4364. The shutdown function can be activated on the MAX4364 EV kit by installing a shunt across the pins of JU1. The shutdown function can also be controlled by an external source connected to the SHDN pad and removing the shunt on JU1 (see Table 1 for shunt positions). Note: When measuring supply current in shutdown mode, the bias through resistor R1 and JU1 must be taken into account. The shutdown current can be calculated by the following equation: EV KIT FUNCTION OUT- 8 OUT- IN+ IN- OUT+ 5 R2 20kΩ R3 20kΩ C5 OPEN Figure 1. MAX4364 EV Kit Schematic _______________________________________________________________________________________ OUT+ MAX4364 Evaluation Kit Figure 3. MAX4364 EV Kit PC Board Layout—Component Side Figure 4. MAX4364 EV Kit PC Board Layout—Solder Side 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 3 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. Evaluates: MAX4364 Figure 2. MAX4364 EV Kit Component Placement Guide— Component Side