19-4272; Rev 0; 9/08 MAX8630X Evaluation Kit The MAX8630X evaluation kit (EV kit) is a fully assembled and tested circuit for evaluating the MAX8630X charge-pump white LED driver. The MAX8630X EV kit operates from a 2.7V to 5.5V supply. Two pulse generator circuits are included on the board for evaluating the serial-pulse dimming feature. The EV kit can also be used to evaluate the MAX8630W with PWM dimming. Ordering Information PART TYPE MAX8630XEVKIT+ EV Kit Features o 93% Max/85% Avg Efficiency (PLED/PBATT) Over Li+ Battery Discharge o Adaptive 1x/1.5x Mode Switchover o 32-Step Serial-Pulse Dimming o Independent On/Off/Dimming for Main and Sub Displays o o o o o 25mA per LED Output Current Low 0.1A Shutdown Current 2.7V to 5.5V Supply Voltage Range On-Board Pulse Generators and White LEDs 14-Pin, 3mm x 3mm TDFN IC Package o Lead-Free and RoHS Compliant +Denotes lead-free and RoHS compliant. o Fully Assembled and Tested Component List DESIGNATION QTY C1-C4 4 C5, C8 2 DESCRIPTION 1F 20%, 6.3V X5R ceramic capacitors (0402) Panasonic ECJ0EB0J105M TDK C1005X5R0J105M Murata GRM1555R60J105M DESIGNATION QTY D6, D7 2 DESCRIPTION Diodes (SOD-323) Central Semi CMDD4448 JU1, JU2 2 3-pin headers JU3, JU4, JU5 0 PCB shorts R1, R2 2 10k 5% resistors (0402) S1, S2 2 Momentary pushbutton switches Panasonic EVQ-PHP03T U1 1 Charge pump (14 TDFN) Maxim MAX8630XETD25 (Top Mark: ADX) U2, U3 2 CMOS switch debouncers (4 SOT143) Maxim MAX6816EUS-T 2.2F 10%, 6.3V X5R ceramic capacitors (0603) Panasonic ECJ1VB0J225K TDK C1608X5R0J225K Murata GRM188R60J225K C6, C7 2 1000pF 10%, X7R ceramic capacitors (0402) TDK C1005X7R1H102K C9 0 Not installed, ceramic capacitor (0402) -- 2 Shunts, 2-position 5 White LEDs Nichia NSCW215T -- 1 PCB: MAX8630X Evaluation Kit+ D1-D5 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 Nichia Corp. 248-352-6575 www.nichia.com Panasonic Corp. 800-344-2112 www.panasonic.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX8630X or MAX8630W when contacting these component suppliers. ________________________________________________________________ Maxim Integrated Products 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. 1 Evaluates: MAX8630X/MAX8630W General Description Evaluates: MAX8630X/MAX8630W MAX8630X Evaluation Kit Quick Start Detailed Description of Hardware Recommended Equipment Serial-Pulse Dimming Before beginning, the follow equipment is needed: * 2.7V to 5.5V power supply capable of delivering 500mA On-board pulse generators are provided to evaluate the serial-pulse dimming feature of the MAX8630X. To enable or disable the main or sub group of LEDs and the corresponding pulse generator, use JU1 and JU2 (see Table 1). When first enabled, the LEDs are at full brightness. To dim the main LEDs, press S1 repeatedly; for the sub LEDs, press S2 repeatedly. Dimming is done in 32 linear steps. On the 32nd button press, the LEDs return to full brightness. To use external pulse generators, cut the traces shorting JU4 and JU5 to disconnect the on-board pulse generators. Connect the external pulse generator to the pads labeled ENM (main) and ENS/PWM (sub). Procedure Follow the steps below to verify board operation: 1) Place shunts across pins 1-2 of JU1 and JU2 to enable the main and sub LEDs. 2) Set the power-supply voltage between 2.7V to 5.5V. Turn the power supply off. Do not turn on the power supply until all connections are completed. 3) Connect the positive power-supply lead to the EV kit pad labeled IN. Connect the power-supply ground to the EV kit pad labeled GND. 4) Turn on the power supply. When turned on, the LEDs are at full brightness. 5) To dim the main LEDs in 1/32nd steps, press S1 repeatedly. The main LEDs return to full brightness after 32 button presses. 6) To dim the sub LEDs in 1/32nd steps, press S2 repeatedly. The sub LEDs return to full brightness after 32 button presses. Table 1. Jumper Settings JUMPER SHUNT POSITION JU5 2 The MAX8630XETD25 (25mA serial-pulse dimming version) comes installed on the MAX8630X EV kit. To evaluate other versions of the MAX8630X, simply replace the IC with a part having the desired factory-programmed, full-scale output current. To evaluate the MAX8630W_ with direct PWM dimming control, replace U1 with the MAX8630W_, cut the traces shorting JU4 and JU5, and install capacitor C9 (typically 0.1F). Apply the PWM dimming signal to the EV kit pad labeled ENS/PWM. FUNCTION ENM is pulled up to IN with a 10k resistor, enabling the main LED group. The pulse generator for the main LED group is powered. 2-3 ENM is pulled down to GND, disabling the main LED group. The pulse generator for the main LED group is not powered. 1-2 ENS is pulled up to IN with a 10k resistor, enabling the sub LED group. The pulse generator for the sub LED group is powered. 2-3 ENS is pulled down to GND, disabling the sub LED group. The pulse generator for the sub LED group is not powered. JU2 JU4 Evaluating Other Versions of the MAX8630 1-2 JU1 JU3 Using Fewer than 5 LEDs To disable any of the LEDs, connect the square pad next to that particular LED to the square pad labeled OUT. Short Connects the on-board LEDs to the MAX8630 output. Open Disconnects the on-board LEDs from the MAX8630 output. Short Connects ENM to the on-board main pulse generator. Open Disconnects ENM from the on-board main pulse generator. Short Connects ENS to the on-board sub pulse generator. Open Disconnects ENS from the on-board sub pulse generator. _______________________________________________________________________________________ MAX8630X Evaluation Kit IN 1 JU1 C5 2.2F 4 VCC 2 U2 IN MAX6816 OUT IN R1 10k GND JU2 C8 2.2F 4 VCC S2 U3 IN MAX6816 GND 1 OUT 1 ENM IN 2 C1N OUT IN 9 JU3 MAX8630X LED1 14 D1 13 D2 12 D3 11 D4 10 D5 ENM LED2 3 R2 10k ENS/PWM D7 8 LED3 ENS JU5 3 OUT C4 1F GND C9 OPEN 2 7 U1 JU4 C6 1000pF 6 C1P C3 1F D6 1 2 3 3 3 GND 1 S1 2 LED4 C7 1000pF LED5 C2P 5 C2N 4 C2 1F Figure 1. MAX8630X EV Kit Schematic _______________________________________________________________________________________ 3 Evaluates: MAX8630X/MAX8630W C1 1F IN Evaluates: MAX8630X/MAX8630W MAX8630X Evaluation Kit Figure 2. MAX8630X EV Kit Component Placement Guide-- Component Side Figure 3. MAX8630X EV Kit PCB Layout--Component Side Figure 4. MAX8630X EV Kit PCB 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. 4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.