MAX20097EVKIT#

Click here for production status of specific part numbers. Evaluates: MAX20097 MAX20097 Evaluation Kit General Description The MAX20097 evaluation kit (EV kit) provides a proven design to evaluate the MAX20097 dual-synchronous buck controller for high-power, high-brightness (HB) LED drivers. The EV kit is set up as a dual-buck LED driver and operates from a DC supply voltage from 4.5V to 65V. The EV kit is configured to deliver up to 2A of current through the LEDS for both the channels. The total voltage of each of the 2 LED strings can vary from 3V to 55V. Features ● Input Voltage: 4.5V to 65V ● Drives 1 to 16 LEDs on Both Channels ● LED Current: 0A to 2A on Both Channels ● Demonstrates UVLO, Output Short Protection, Overload ● Demonstrates Current-Limit and Thermal-Shutdown Feature ● Proven PCB Layout and Thermal Design ● Fully Assembled and Tested Ordering Information appears at end of data sheet. 319-100254; Rev 0; 9/18 Quick Start Required Equipment ● MAX20097 EV kit ● 5V to 65V, 5A DC power supply ● Four digital voltmeters ● Two series-connected LED strings rated to no less than 3A ● Two current probes to measure the HB LED current ● Small flat-blade screwdriver to turn the potentiometer ● Oscilloscope Procedure The MAX20097 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on power supply until all connections are complete. 1) Verify that all jumper positions are as shown in Table 1. 2) Connect one of the LED string anode to the LED1+ PCB pad and the cathode to GND1. Connect the second LED string anode to LED2+ PCB pad and cathode to GND2 PCB pad. 3) Connect a voltmeter across the LED1+ and GND1 PCB pads and another voltmeter between LED2+ and GND2 PCB pads. 4) Connect a voltmeter across the REFI1, REF2, and AGND test points. 5) Connect the power supply terminals to the IN and the GND3 PCB pads. 6) Clip a current probe across the wire connecting to the LEDs in both of the LED strings. 7) Turn on the power supply and set to a voltage greater than the maximum LED string voltage, but less than the 65V maximum input voltage. 8) Use a screwdriver to turn the potentiometer R23 until voltmeter reads 1.2V. Do the same with potentiometer R5. 9) Measure the LED current using the current probe in both the LED strings and verify the current is 2A. 10) Use a voltmeter to verify the expected LED string voltage for both channels. Evaluates: MAX20097 MAX20097 Evaluation Kit Table 1. MAX20097 EV Kit Jumper Descriptions JUMPER J1 SHUNT POSITION Closed (Default) Open J2 J3 Closed (Default) Use the external power supply on REFI2 to set the LED2+ current. Single power supply input for both the buck controllers Powers up the LED2+ controller separately through IN2 and GND4 PCB pads. Open External PWM pulse generator to be applied on DIM2 test point. 1-2 (Default) DIM2 pulled up to VCC for 100% PWM dimming. 2-3 DIM2 input is GND and LED2+ string is disabled. 1-2 (Default) 2-3 Open J6 Use the resistive divider to set the LED current on LED2+ string Open J4 J5 DESCRIPTION IN power supply connected to the IN pin of the device. IN pin of the device shorted to VCC and external voltage between 4.5V to 5.5V can be forced on VCC test point. External PWM pulse generator to be applied on DIM1 test point 1-2 (Default) DIM1 pulled up to VCC for 100% PWM dimming. 2-3 DIM1 input is GND and LED1+ string is disabled. Closed (Default) Use the resistive divider to set the LED current on LED1+ string. Open Use the external power supply on REFI1 to set the LED current. J7 Closed (Default) VCC and VIO shorted J15 Closed (Default) Pull FLTB to VCC through 10kΩ resistor www.maximintegrated.com Maxim Integrated │  2 Evaluates: MAX20097 MAX20097 Evaluation Kit Detailed Description Pulse-Dimming Inputs (DIM1, DIM2) The MAX20097 is a dual-channel, high-voltage, synchronous N-channel high-current buck LED drivers. The device uses a proprietary average current mode control scheme to regulate the inductor current. This control method does not require any control loop compensation while maintaining nearly constant switching frequency. Inductor current sense is achieved by sensing the current in the bottom switching device. The MAX20097 integrates 2 fully synchronous buck controllers. The devices operate over a wide input range of 4.5V to 65V. The device is designed for high-frequency operation and can operate as high as 1MHz. The EV kit demonstrates the PWM dimming feature of the MAX20097. Remove the shunt on J5. Connect a PWM signal to the DIM1 test point. Vary the duty cycle to increase or decrease the intensity of the LED1+ string. The DIM1 and DIM2 inputs of the device have a 2V (max) rising threshold and a 0.8V (min) falling threshold and are compatible with 3.3V and 5V logic-level signals. Remove the shunt on J3 for PWM dimming on LED2+ string. Connect a PWM signal to the DIM2 test point. Vary the duty cycle to increase or decrease the intensity of the LED2+ string. Analog Dimming Control (REFI1, REFI2) The EV kit demonstrates the fault-protection features of the device, which include short-LED, open-LED, and overtemperature protection. The FLTB output is an opendrain, active-low fault indicator. The EV kit demonstrates the analog dimming feature of the device. R22 and R23 form a resistor-divider between VCC and AGND and sets the voltage on REFI1 pin. R22 is a 10kΩ resistor and R23 is a 10kΩ potentiometer, with the wiper shorted to the high side of the potentiometer. Using a flat-blade screwdriver, turn the wiper-adjustment pin clockwise to increase the voltage on the REFI1 input. Turn the wiper-adjustment pin counterclockwise to decrease the voltage on the REFI input. The REFI1 input allows for analog dimming of the LED string connected between LED1+ and GND1. A REFI1 input voltage of 0.2V or less turns off the LED driver. A REFI1 input voltage between 0.2V and 1.2V provides linear dimming of the LED string. A REFI input voltage greater than 1.2V sets the LED string current to maximum current (based on the current-sense resistor). The analog dimming on channel 2 is controlled by the resistive-divider formed by R3 and R4 (potentiometer). Follow the same procedure as described for REFI1. Alternatively, the analog dimming input can be set with an external power supply. Remove the shunt on J6 and connect an external power supply directly to the REFI1 test point to perform analog dimming on LED1+ string. Remove the shunt on J1 and connect an external power supply directly to the REFI2 test point to perform analog dimming on LED2+ string. Fault Indicator Current Monitor Output The EV kit also demonstrates the current monitor output feature of the device. The IOUTV1 and IOUTV2 test points output a voltage which is a measure of the LED current. Refer to the MAX20096/MAX20097 data sheet for the equation relating to the IOUTV1 and IOUTV2 voltage as well as the LED current. External VCC Input The EV kit also demonstrates operation of the device with an external VCC input. In this case, the internal LDO is not used. Move the shunt on J4 to pins 2-3. In this case, IN and VCC pins of the device are shorted together. Apply an external power supply between 4.6V and 5.5V on the VCC test point to allow switching of the device. Separate Power Supply Inputs The second (LED2+) buck controller can be driven with a separate power supply, if needed. Removing the shunt on J2 enables to do this. Connect the second power supply between IN2 and GND4 PCB pads. Ordering Information PART TYPE MAX20097EVKIT# EV Kit #Denotes RoHS compliant. www.maximintegrated.com Maxim Integrated │  3 Evaluates: MAX20097 MAX20097 Evaluation Kit MAX20097 EV Kit Bill of Materials ITEM QTY REF DES MAXINV MFG PART # MANUFACTURER VALUE DESCRIPTION 1 9 IN, IN2, AGND, GND1-GND4, LED1+, LED2+ 01-9020BUSS20AWG-00 9020 BUSS WEICO WIRE MAXIMPAD EVK KIT PARTS; MAXIM PAD; WIRE; NATURAL; SOLID; WEICO WIRE; SOFT DRAWN BUS TYPE-S; 20AWG 2 2 C1, C28 20-0001U-CA96 CGA4J3X7R1H105M125AB TDK 1UF CAPACITOR; SMT (0805); CERAMIC CHIP; 1UF; 50V; TOL=20%; TG=-55 DEGC TO +125 DEGC; TC=X7R; AUTO 3 6 C2, C6, C14, C16, C23, C27 20-000U1-DA52 CGA3E2X7R1H104K080AE TDK 0.1UF CAPACITOR; SMT (0603); CERAMIC CHIP; 0.1UF; 50V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R; AUTO; SOFT TERMINATION 4 4 C3, C12, C18, C26 20-1000P-CA80 CGA3E2C0G2A102J080AA TDK 1000PF CAPACITOR; SMT (0603); CERAMIC CHIP; 1000PF; 100V; TOL=5%; TG=-55 DEGC TO +125 DEGC; TC=C0G; AUTO 5 2 C4, C20 20-0001U-CA22 CGA3E1X7R1V105K TDK 1UF CAPACITOR; SMT (0603); CERAMIC CHIP; 1UF; 35V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R; AUTO 6 4 C9, C11, C17, C21 20-004U7-CA59 CGA6M3X7S2A475K200AE TDK 4.7UF CAPACITOR; SMT (1210); CERAMIC CHIP; 4.7UF; 100V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7S; AUTO 7 2 C10, C19 20-00U22-BA63 CGA3E3X7R1H224K080AB; GCM188R71H224KA49 TDK; MURATA 0.22UF CAPACITOR; SMT (0603); CERAMIC CHIP; 0.22UF; 50V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R; AUTO 8 1 C13 20-002U2-CA73 CGA3E1X7R0J225K080AC TDK 2.2UF CAPACITOR; SMT (0603); CERAMIC; 2.2UF; 6.3V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R; AUTO 9 1 C15 20-000U1-CA82 CGA4J2X7R2A104K125AA TDK 0.1UF CAPACITOR; SMT (0805); CERAMIC CHIP; 0.1UF; 100V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R; AUTO 10 2 D1, D4 30-1N4448WS7F-00 1N4448WS-7-F DIODES INCORPORATED 1N4448WS-7-F DIODE; SWT; SOD-323; PIV=75V; IF=0.5A 11 4 D2, D3, D5, D6 30-B18013F-00 B180-13-F DIODES INCORPORATED B180-13-F DIODE; SCH; SCHOTTKY BARRIER RECTIFIER; SMA; PIV=80V; IF=1A N/A TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.35IN; BOARD HOLE=0.063IN; WHITE; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; RECOMMENDED FOR BOARD THICKNESS=0.062IN; NOT FOR COLD TEST 12 8 VCC, DIM1, DIM2, FLTB, REFI1, REFI2, IOUTV1, IOUTV2 02-TPCOMP5007-00 13 5 J1, J2, J6, J7, J15 01-PCC02SAAN2P-21 PCC02SAAN SULLINS PCC02SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT THROUGH; 2PINS; -65 DEGC TO +125 DEGC 14 3 J3-J5 01-PCC03SAAN3P-21 PCC03SAAN SULLINS PCC03SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT THROUGH; 3PINS; -65 DEGC TO +125 DEGC 15 2 L1, L2 50-0047U-S44A MSS1278T-473ML COILCRAFT 47UH INDUCTOR; SMT; FERRITE BOBBIN CORE; 47UH; TOL=+/-20%; 5.4A www.maximintegrated.com 5007 KEYSTONE COMMENTS Maxim Integrated │  4 Evaluates: MAX20097 MAX20097 Evaluation Kit MAX20097 EV Kit Bill of Materials (continued) ITEM QTY REF DES MAXINV MFG PART # MANUFACTURER VALUE DESCRIPTION 16 4 Q1-Q4 90-BUK9Y10780E-21 BUK9Y107-80E NXP BUK9Y107-80E TRAN; N-CHANNEL 80V; 107MOHM LOGIC LEVEL MOSFET; NCH; LFPAK; PD-(37W); I-(11.8A); V-(80V) 17 2 R1, R24 80-0453K-24 ERJ-3EKF4533V PANASONIC 453K RESISTOR; 0603; 453K OHM; 1%; 100PPM; 0.10W; THICK FILM 18 4 R2, R3, R21, R25 80-024K9-24 CRCW060324K9FK VISHAY DALE 24.9K RESISTOR; 0603; 24.9K OHM; 1%; 100PPM; 0.10W; THICK FILM 19 5 R4, R14, R22, R29, R30 80-0010K-24 CRCW060310K0FK; ERJ-3EKF1002 VISHAY DALE; PANASONIC 10K RESISTOR; 0603; 10K; 1%; 100PPM; 0.10W; THICK FILM 10K RESISTOR; THROUGH-HOLERADIAL LEAD; 3296 SERIES; 10K OHM; 10%; 100PPM; 0.5W; SQUARE TRIMMING POTENTIOMETER; 25 TURNS; MOLDER CERAMIC OVER METAL FILM 20 2 R5, R23 80-0010K-39A 3296W-1-103LF BOURNS 21 2 R6, R20 80-000R1-CA25 RUW3216FR100 SAMSUNG ELECTRONICS 22 8 R7, R8, R10, R16, R18, R19, R31, R32 80-0000R-27 CRCW06030000ZS; VISHAY DALE/ROHM/ MCR03EZPJ000; ERJ-3GEY0R00 PANASONIC 23 4 R11-R13, R15 80-004R7-19 CRCW06034R70FN 24 25 TOTAL 0.1 0 VISHAY DALE 4.7 COMMENTS RESISTOR; 1206; 0.1 OHM; 1%; 150PPM; 1W; THICK FILM RESISTOR; 0603; 0 OHM; 0%; JUMPER; 0.10W; THICK FILM RESISTOR; 0603; 4.7 OHM; 1%; 100PPM; 0.10W; THICK FILM 1 U1 00-SAMPLE-01 MAX20097AHI+ MAXIM MAX20097AHI+ EVKIT PART-IC; DRV; DUAL CHANNEL HIGH VOLTAGE BUCK LED DRIVER WITH SPI INTERFACE; PACKAGE OUTLINE: 21-0066; PACKAGE CODE: U28-1; TSSOP28 1 PCB N/A MAX20097EVK MAXIM PCB PCB:MAX20097EVK - 88 DO NOT PURCHASE(DNP) ITEM QTY 1 2 R9, R17 N/A N/A N/A OPEN RESISTOR; 0603; OPEN; FORMFACTOR 8 C5, C7, C8, C22, C24, C25, C29, C30 N/A N/A N/A OPEN CAPACITOR; SMT (0603); OPEN; FORMFACTOR 2 TOTAL REF DES MAXINV MFG PART # MANUFACTURER VALUE DESCRIPTION COMMENTS 10 PACKOUT (These are purchased parts but not assembled on PCB and will be shipped with PCB) ITEM TOTAL QTY REF DES MAXINV MFG PART # MANUFACTURER VALUE DESCRIPTION COMMENTS 0 www.maximintegrated.com Maxim Integrated │  5 7 10K R5 1 3 2 2 10K R4 1000PF REFI2 6 PCC02SAAN IOUTV2 1 2 J1 1W 1206 0.1 R6 1UF C4 0 OPEN R9 A R11 D1 C CSP2 4.7 VCC TON2 OUT2 10K R29 REFI2 IOUTV2 DIM2 CSN2 DL2 1N4448WS-7-F 0.1UF 50V C6 C8 OPEN R8 0 R7 OPEN C5 GL2 R12 D2 4.7 VCC 1000PF C12 VCC 5 BST2 A VCC CSP2 C3 24.9K R3 4 C B180-13-F CSN2 OUT2 VCC TON2 IN S G D LX2 0 R31 REFI2 TON2 PCC02SAAN 24.9K R2 Q1 BUK9Y107-80E C10 1 2 3 J3 0.1UF C14 1 2 3 BST1 VCC DH1 IN_PIN VCC 50V PCC03SAAN 2.2UF C13 C15 100V 0.1UF 0805CAP DH2 PCC02SAAN J2 VIO 8 1 2 B180-13-F 453K 2 0 R10 4.7UF 1210 4.7UF 1210 0.22UF OPEN C7 4 GH2 100V C11 100V C9 1 2 AGND A VCC VIO J7 OPEN OUT2 D5 R1 47UH MSS1278T-473ML 1 D S G IN2 VIO D3 C 4.7 R13 10K R14 VCC 0.1UF C16 50V 4 FLTB 1 2 0 R32 R15 D4 A 0.22UF C19 VCC 1 2 3 4.7 1UF J5 OPEN R17 D G S C25 D OPEN 1W 1 2 DIM2 DIM1 0.1 R20 J6 REFI1 DIM2 DIM1 PCC02SAAN 1206 3 1 L2 10K R23 VCC TON1 IN 1 3 2 2 2 10K R22 2 OUT1 B180-13-F 24.9K R25 453K R24 2 ENGINEER: B HARDWARE NUMBER: DRAWING TITLE: SIZE OPEN C30 TEMPLATE REV: SC DRAWN BY: 1UF 0805CAP 0.1UF C28 50V C27 LED1+ 50V MAX20097_EVKIT_A PROJECT TITLE: D6 1000PF C26 24.9K R21 47UH MSS1278T-473ML Q4 BUK9Y107-80E Q3 BUK9Y107-80E G S IOUTV1 0.1UF C23 50V 0 R19 0 R18 4 OPEN C24 GL1 PCC03SAAN C20 OPEN C22 4 GH1 3 CAPACITORS AND RESISTORS ARE 0603 SIZE UNLESS OTHERWISE NOTED. PCC02SAAN J15 FLTB 10K R30 1000PF C18 DIM1 IOUTV1 REFI1 CSN1 R16 0 4.7UF 1210 100V C21 1N4448WS-7-F C 4.7UF 1210 100V C17 DL1 TON1 OUT1 LX1 B180-13-F A PCC03SAAN J4 CSP1 AGND GND2 C29 50V 0.1UF 1UF 0805CAP C2 50V C1 LED2+ L1 Q2 BUK9Y107-80E IN2 4 CSN1 B C LED2+ GND4 C A 5 3 2 1 GND3 14 IN 13 IN 12 D 7 5 6 6 3 7 11 IOUTV2 DL2 15 LX2 16 1 5 1 2 3 5 1 2 3 5 3 2 1 10 DIM2 17 9 VCC BST2 18 8 DH2 19 PGND 20 5 FLTB 21 IN 22 4 DIM1 DH1 23 BST1 24 2 IOUTV1 25 REFI1 LX1 28 DL1 26 TON1 27 OUT1 3 U1 1 3 C A www.maximintegrated.com MAX20097AHI+ 1 8 1 GND1 LED1+ 1 SHEET 2 OF 2 A 09/2018 REV: DATE: A B C D MAX20097 Evaluation Kit Evaluates: MAX20097 MAX20097 EV Kit Schematic Figure 1. MAX20097 EV Kit Schematic Maxim Integrated │  6 Evaluates: MAX20097 MAX20097 Evaluation Kit MAX20097 EV PCB Layouts 1” Figure 2. MAX20097 EV Kit Component Placement Guide— Component Side Figure 3. MAX20097 EV Kit PCB Layout—Top Layer 3.30 3.20 1” Figure 4. MAX20097 EV Kit PCB Layout—Inner Layer 1 www.maximintegrated.com Maxim Integrated │  7 Evaluates: MAX20097 MAX20097 Evaluation Kit MAX20097 EV PCB Layouts (continued) 3.30 3.30 3.20 3.20 1” Figure 5. MAX20097 EV Kit PCB Layout—Inner Layer 2 www.maximintegrated.com 1” Figure 6. MAX20097 EV Kit PCB Layout—Bottom Layer Maxim Integrated │  8 Evaluates: MAX20097 MAX20097 Evaluation Kit Revision History REVISION NUMBER REVISION DATE 0 9/18 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2018 Maxim Integrated Products, Inc. │  9