19-2900; Rev 0; 12/07 MAX17014 Evaluation Kit The MAX17014 evaluation kit (EV kit) is a fully assembled and tested surface-mount printed-circuit board (PCB) that provides the voltages and features required for thinfilm transistor (TFT) liquid-crystal display (LCD) TV panels. The EV kit includes a step-down switching regulator, a step-up switching regulator, a positive two-stage charge pump for the TFT gate-on supply, a negative single-stage charge pump for the TFT gate-off supply, and two high-current operational amplifiers (op amps). The EV kit operates from a DC supply voltage of +10.8V to +13.2V, as configured. The step-down switching regulator is configured for a +3.3V output providing at least 2A. The step-up switching regulator is configured for a +16V output providing at least 1.5A. The positive charge pump is configured for a +35V output providing at least 50mA. The negative charge pump is configured for a -6V output providing at least 100mA. Highfrequency operation (1.2MHz) allows the use of tiny surface-mount components to minimize the thickness of LCD panel designs. The EV kit features two high-performance operational amplifiers (op amps) designed to drive the LCD backplane (VCOM). Power to the VCOM amplifiers comes from the step-up switching regulator output. Features +10.8V to +13.2V Input Range Output Voltages +3.3V at 2A (Step-Down Switching Regulator) +16V at 1.5A (Step-Up Switching Regulator) +35V at 50mA (Positive Charge Pump) -6V at 100mA (Negative Charge Pump) Adjustable Output Voltages (External Resistors) 1.2MHz Switching Frequency (600kHz Selectable) Two High-Speed Op Amps Low-Profile Surface-Mount Components Fully Assembled and Tested Ordering Information PART TYPE MAX17014EVKIT+ EV Kit +Denotes lead-free and RoHS-compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION 3 10F 20%, 16V X5R ceramic capacitors (1206) Murata GRM31CR61C106K TDK C3216X5R1C106M 10 0.1F 10%, 50V X7R ceramic capacitors (0603) Murata GRM188R71H104K TDK C1608X7R1H104K C5 1 22F 10%, 6.3V X5R ceramic capacitor (1206) Taiyo Yuden EMK316BJ226ML Murata GRM31CR60J226M C6 0 Not installed, capacitor (1206) C20 2 1F 10%, 16V X5R ceramic capacitors (0603) Murata GRM188R71C105K TDK C1608X5R1C105K 220pF 10%, 50V X7R ceramic capacitor (0603) Murata GRM188R71H221K TDK C1608X7R1H221K C26 C1, C2, C3 C4, C7, C11, C14, C17, C21, C22-C25 C8, C15 C9 1 C10 C12, C13 C16, C18, C19 QTY DESCRIPTION 1 0.22F 10%, 10V X7R ceramic capacitor (0603) Taiyo Yuden LMK107BJ224KA TDK C1608X7R1A224K 2 0.15F 10%, 16V X7R ceramic capacitors (0603) Taiyo Yuden EMK107BJ154KA TDK C1608X7R1E154K 3 10F 20%, 25V X5R ceramic capacitors (1210) Taiyo Yuden TMK325BJ106MM TDK C3225X5R1E106M 1 330pF 10%, 50V X7R ceramic capacitor (0603) Murata GRM188R71H331K TDK C1608X7R1H331K 1 1F 10%, 50V X7R ceramic capacitor (1206) Murata GRM31MR71H105KA TDK C3216X7R1H105K ________________________________________________________________ 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: MAX17014 General Description Evaluates: MAX17014 MAX17014 Evaluation Kit Component List (continued) DESIGNATION QTY C27, C29, C30, C31 DESIGNATION DESCRIPTION 0 Not installed, capacitors (0603) C28 1 100pF 5%, 50V C0G ceramic capacitor (0603) Murata GRM1885C1H101J TDK C1608C0G1H101J C32 0 Not installed, capacitor (1210) 2 30V, 3A Schottky diodes (M-flat) Toshiba CMS02 (TE12L,Q) 3 100V, 200mA dual ultra-fast diodes (SOT23) Fairchild MMBD4148SE (Top Mark: D4) Central Semiconductor CMPD1001S Lead Free (Top Mark: L21) D1, D2 D3, D4, D5 D6 1 100V, 200mA single ultra-fast diode (SOT23) Fairchild MMBD4148 (Top Mark: 5H) Central Semiconductor CMPD1001 Lead Free (Top Mark: L20) EN1, EN2, MODE, REF, VL 5 Test points Keystone 5000 JU1, JU3, JU4, JU5 4 2-pin headers JU2, JU6 2 3-pin headers 1 Low-profile 4.7H, 3.5A inductor (2mm height) TOKO FDV0620-4R7M Wurth S06100032 L1 QTY DESCRIPTION L2 1 Low-profile 2.4H, 2.6A inductor (1.8mm height) TOKO 1124BS-2R4M (2.4H) Wurth 744052002 (2.5H) R1 1 150k 1% resistor (0603) R2 1 23.7k 1% resistor (0603) R3 1 158k 1% resistor (0603) R4, R6, R17 3 13.3k 1% resistors (0603) R5 1 82.5k 5% resistor (0603) R7 1 2.2k 1% resistors (0603) R8-R11, R19 5 20k 1% resistors (0603) R12, R13, R20 3 0 5% resistors (0603) R14, R21, R22, R23 4 100k 5% resistors (0603) R15 1 1k 5% resistor (0603) R16 1 357k 1% resistor (0603) R18 0 Not Installed, resistor (0603) U1 1 Low-cost multiple-output power supply for LCD TVs (48-pin thin QFN, 7mm x 7mm) Maxim MAX17014ETM+ -- 5 Shunts, 0.1in centers -- 1 PCB: MAX17014 Evaluation Kit+ Component Suppliers SUPPLIER PHONE WEBSITE Central Semiconductor 516-435-1110 www.centralsemi.com Fairchild Semiconductor 408-822-2000 www.fairchildsemi.com Murata Mfg. Co., Ltd. 770-436-1300 www.murata.com Taiyo Yuden 800-348-2496 www.t-yuden.com TDK Corp. 847-390-4373 www.component.tdk.com TOKO America, Inc. 847-297-0070 www.tokoam.com Toshiba America Electronic Components, Inc. 949-455-2000 www.toshiba.com/taec Wurth Electronik GmbH & Co. KG 201-785-8800 www.we-online.com Note: Indicate that you are using the MAX17014 when contacting these component suppliers. 2 _______________________________________________________________________________________ MAX17014 Evaluation Kit Although the IC specifies a +8V to +16.5V input range, the EV kit is optimized for +10.8V to +13.2V input supply. Recommended Equipment Before beginning, the following equipment is needed: * +10.8V to +13.2V, 3A DC power supply * Digital multimeters (DMMs) Procedure The MAX17014 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) Connect the positive terminal of the DC power supply to the VIN pad. Connect the negative terminal of the DC power supply to the PGND pad. 2) Preset the power supply to +12V and disable the output. 3) Verify that the jumpers follow the default settings in Table1. 4) Turn on the power supply. 5) Verify that the step-down regulator output (OUT) is +3.3V. 6) Verify that the step-up regulator output (AVDD) is +16V. 7) Verify that the gate-on supply (VGON) is +35V. 8) Verify that the gate-off supply (VGOFF) is -6V. 9) Verify that the op-amp outputs (VCOM1, VCOM2) are +8V. Table 1. Default Jumper Settings JUMPER SHUNT POSITION JU1 Not installed JU2 2-3 JU3 Installed JU4 Installed JU5 Installed JU6 1-2 Detailed Description The MAX17014 EV kit evaluates the MAX17014 multipleoutput power-supply IC, which is designed primarily for TFT LCD panels used in monitors and TVs. The EV kit contains a step-down switching regulator to generate the logic supply rail, a step-up switching regulator to generate the source driver supply, and two chargepump regulators to generate the gate driver supplies. The EV kit also includes two high-performance op amps designed to drive the LCD back plane (VCOM). Jumper Selection Several jumper settings in the following tables illustrate features of the MAX17014 EV kit. Switching Frequency Selection (FSEL) The step-down and step-up regulators on the MAX17014 EV kit switch at the same frequency, but are 180 out-ofphase with each other. The EV kit features a 2-pin jumper (JU1) to select the operating frequency. The EV kit is optimized for 1.2MHz switching frequency; proper operation at 600kHz may require component changes. Table 2 lists the selectable JU1 jumper options. Table 2. Jumper JU1 Functions SHUNT POSITION FSEL PIN CONNECTED TO EV KIT FREQUENCY Not installed* VL (through pullup resistor R21) 1.2MHz Installed GND 600kHz *Default position. High-Voltage Switch Mode (MODE) The MAX17014 EV kit features an option to select the operating mode (delay or no delay) for the high-voltage switches. On the rising edge of the CTL pin, GON connects to SRC. On CTL's falling edge, GON may connect immediately to DRN (no delay), or GON may connect to DRN after a delay set by capacitor C9. Refer to the High-Voltage Switch Control section in the MAX17014 IC data sheet for a more detailed description of the two modes of operation. Jumper JU2 selects the high-voltage switch mode for the MAX17014. Table 3 lists the selectable JU2 jumper options. Table 3. Jumper JU2 Functions SHUNT POSITION MODE PIN CONNECTED TO HIGH-VOLTAGE SWITCH MODE Delay set by C9 1-2 C9 2-3* VL No delay Not installed Unconnected Not allowed *Default position. Step-Down and Negative Charge-Pump Regulator Enable Input (EN1) The MAX17014 EV kit features a jumper (JU3) to control the step-down and negative charge-pump regulator enable input (EN1). By default, a shunt is installed across JU3 to provide EN1 logic-high. When EN1 is _______________________________________________________________________________________ 3 Evaluates: MAX17014 Quick Start Evaluates: MAX17014 MAX17014 Evaluation Kit Table 4. Jumpers JU3 and JU4 Functions SHUNT POSITION JU3 STEP-DOWN AND NEGATIVE CHARGE-PUMP REGULATOR JU4 STEP-UP AND POSITIVE CHARGE-PUMP REGULATOR Installed* Installed* Enabled Enabled Installed Not installed Enabled Disabled X Disabled Disabled Not installed *Default position. X = Don't care. Table 5. Jumper JU5 Functions SHUNT POSITION CTL PIN CONNECTED TO Installed* VL MAX17014 HIGH-VOLTAGE SWITCH CONFIGURATION GON pin connected to SRC pin Not installed GND (through resistor R14) GON pin connected to DRN pin Not installed (external logic controller connected to CTL pad) External logic controller GON pin connected to SRC pin (CTL driven high) GON pin connected to DRN pin (CTL driven low) *Default position. logic-high, both the OUT and the VGOFF outputs are enabled. Removing the shunt disables the OUT and the VGOFF outputs. Refer to the Power-Up Sequence section in the MAX17014 IC data sheet for a more detailed description of the OUT and VGOFF power-up sequence. Table 4 lists the selectable JU3 jumper options. Step-Up and Positive Charge-Pump Regulator Enable Input (EN2) The MAX17014 EV kit features a jumper (JU4) to control the step-up and positive charge-pump regulator enable input (EN2). By default, a shunt is installed across JU4 to provide EN2 logic-high. When EN2 and EN1 are logic-high, both the AVDD and the VGON outputs are enabled. EN2 is inactive when EN1 is low. Refer to the Power-Up Sequence section in the MAX17014 IC data sheet for a more detailed description of the AVDD and VGON power-up sequence. Table 4 lists the selectable JU4 jumper options. High-Voltage Switch Control Input (CTL) Jumper JU5 configures the setting to control the highvoltage switch control pin (CTL) of the MAX17014 IC. Switches between the SRC and GON pins and the GON and DRN pins can also be controlled by an external logic controller connected to the CTL pad. See Table 5 for switch states and refer to the High-Voltage Switch Control section in the MAX17014 IC data sheet for further information about the high-voltage switches connected to the GON pin. VGON Discharge Path jumper JU6. When CTL is low, GON may be connected to DRN, allowing VGON to discharge through resistor R15. JU6 selects the discharge path by connecting R15 to AVDD (through diode D6) or to PGND. Table 6 lists the selectable JU6 jumper options. Table 6. Jumper JU6 Functions SHUNT POSITION DRN PIN CONNECTED TO VGON DISCHARGED TOWARD 1-2* AVDD (through resistor R15 and diode D6) AVDD 2-3 PGND (through resistor R15) PGND *Default position. Output Voltage Selection Step-Down Switching-Regulator Output Voltage (OUT) The MAX17014 EV kit's step-down switching regulator supports both fixed and adjustable output voltages. By default, the EV kit's step-down regulator's output (OUT) is set to the +3.3V fixed mode by connecting FB2 to GND through resistor R19. For adjustable mode (+1.25V to +5V), select R18 and R19 to set the desired step-down regulator output voltage. Refer to the Detailed Description, Step-Down Regulator section in the MAX17014 IC data sheet for instructions on selecting resistors R18 and R19. The MAX17014 EV kit features a method to configure the VGON discharge path using resistor R15 and 4 _______________________________________________________________________________________ MAX17014 Evaluation Kit The MAX17014 EV kit's step-up switching-regulator output (AVDD) is set to +16V by feedback resistors R3 and R4. To generate output voltages other than +16V (VIN to +20V), select different external voltage-divider resistors. Refer to the Design Procedure, Step-Up Regulator section in the MAX17014 IC data sheet for instructions on selecting the feedback resistors. Negative Charge-Pump Output (VGOFF) The negative charge-pump output (VGOFF) is set to -6V by voltage-divider resistors R1 and R2. To set VGOFF to other voltages (0V to -AVDD), select different divider resistors. For VGOFF lower than -16V, select C15 with a higher voltage rating. Refer to the Design Procedure, Charge-Pump Regulators, Output Voltage Selection section in the MAX17014 IC data sheet for instructions on selecting resistors R1 and R2. Positive Charge-Pump Output (VGON) Op-Amp Output Voltages (VCOM1, VCOM2) The positive charge-pump output (VGON) is set to +35V by voltage-divider resistors R16 and R17. To set VGON to other voltages (up to approximately 3 x AVDD, 44V max), select different divider resistors. Refer to the Design Procedure, Charge-Pump Regulators, Output Voltage Selection section in the MAX17014 IC data sheet for instructions on selecting resistors R16 and R17. The MAX17014 EV kit's op-amp outputs (VCOM1, VCOM2) are designed to drive the LCD backplane (VCOM). Both op amps are configured as unity gain buffers by resistors R12 and R13. Using external voltage-divider resistors, each op amp's output is set for one half of the AVDD output voltage. To generate output voltages other than +8V, select different external voltage-divider resistors (R8-R11). _______________________________________________________________________________________ 5 Evaluates: MAX17014 Step-Up Switching-Regulator Output Voltage (AVDD) 6 Figure 1. MAX17014 EV Kit Schematic _______________________________________________________________________________________ PGND -6V, 100mA VGOFF PGND C6 OPEN REF C15 1F 16V PGND +3.3V, 2A OUT PGND +10.8V TO +13.2V VIN C31 OPEN C5 22F 6.3V VIN R2 23.7k 1% R1 150k 1% R22 100k EN1 JU1 C28 100pF R18 OPEN VL JU3 2 1 R L C11 0.1F C9 220pF MODE R19 20k 1% L2 2.4H D3 VL D2 3 R23 100k EN2 C12 0.15F JU2 3 VIN C14 0.1F C13 0.15F REF C8 1F C7 0.1F C10 0.22F JU4 VL REF VL C3 10F 16V VL R20 0 R21 100k 1 2 MODE VIN C4 0.1F LX2 IN2 IN2 11 14 19 6 32 33 29 18 34 15 17 4 28 30 27 21 20 C27 OPEN CPGND DRVN N.C. DLP EN2 EN1 DEL2 DEL1 GND GND REF MODE FSEL VL VIN FB2 OUT 24 LX2 23 26 25 16 FBN U1 EP MAX17014 BST 22 C1 10F 16V C30 OPEN 10 FBP C2 10F 16V 37 CTL AVDD R16 357k 1% 12 13 7 8 9 5 46 44 2 48 3 45 1 47 43 31 41 42 40 39 36 35 38 R17 13.3k 1% DRVP SUP DRN GON SRC CTL OUT2 NEG2 OUT1 NEG1 THR POS2 POS1 OGND OVIN COMP FB1 SWO SUI SWI GND1 GND1 LX1 LX1 L1 4.7H C22 0.1F SW1 SRC C20 330pF 3 3 SW1 C29 OPEN R3 158k 1% SW1 D5 D4 2 JU5 2 L 1 R L 1 R VL R14 100k CTL VCOM2 AVDD C25 0.1F 50V C26 1F 50V AVDD R8 20k R9 1% 20k 1% AVDD R4 13.3k 1% VCOM1 R10 20k R11 1% 20k 1% AVDD C19 10F 25V C16 10F 25V SRC +35V, 50mA VGON C18 10F 25V C24 0.1F C23 0.1F R13 0 R12 0 C21 0.1F R5 82.5k C32 OPEN C17 0.1F D1 SRC R15 1k AVDD 1 3 2 3 JU6 1 D6 R7 2.2k 1% R6 13.3k 1% +16, 1.5A AVDD PGND AVDD Evaluates: MAX17014 MAX17014 Evaluation Kit MAX17014 Evaluation Kit Evaluates: MAX17014 Figure 2. MAX17014 EV Kit Component Placement Guide--Component Side _______________________________________________________________________________________ 7 Evaluates: MAX17014 MAX17014 Evaluation Kit Figure 3. MAX17014 EV Kit PCB Layout--Component Side 8 _______________________________________________________________________________________ MAX17014 Evaluation Kit Evaluates: MAX17014 Figure 4. MAX17014 EV Kit PCB Layout--Internal Layer 2 (PGND Plane) _______________________________________________________________________________________ 9 Evaluates: MAX17014 MAX17014 Evaluation Kit Figure 5. MAX17014 EV Kit PCB Layout--Internal Layer 3 (Signal/GND Plane) 10 ______________________________________________________________________________________ MAX17014 Evaluation Kit Evaluates: MAX17014 Figure 6. MAX17014 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 (c) 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX17014EVKIT+