MAX17606SFBEVKIT#

Evaluates: MAX17606 MAX17606 Synchronous Flyback Evaluation Kit General Description The MAX17606 evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates an isolated 15W synchronous flyback DC-DC converter. The circuit uses the MAX17606 secondary synchronous rectifier driver in a 6-pin SOT23 package, as well as the MAX17597 peak current mode flyback controller in a 16-pin TQFN package. The EV kit circuit is configured to deliver an isolated +5V output voltage and provides up to 3A of output current. The EV kit is programmed to operate at a 200kHz switching frequency. An optocoupler, along with the transformer, provides the galvanic isolation between input and output, up to 1875VRMS. Quick Start Recommended Equipment ●● One 18V–36V DC, 2A power supply ●● Load capable of sinking 3A ●● Four digital multimeters (DMM) ●● MAX17606_SYNC_FB EVKITA# Warning: 1) Do not turn on the power supply until all connections are completed. 2) Wear protective eye gear at all times. Features 3) Do not touch any part of the circuit with bare hands or conductive materials when powered up. ●● Isolated Output: +5V DC, 3A 4) Make sure all high-voltage capacitors are fully discharged before handling. Allow 5 minutes after disconnecting input power source before touching circuit parts. ●● 18V to 36V DC Input Range ●● Compact Design with High (200kHz) Switching Frequency ●● 90% Peak Efficiency ●● Low-Cost Flyback Design ●● Galvanic Isolation up to 1875VRMS ●● Proven PCB Layout ●● Fully Assembled and Tested Ordering Information appears at end of data sheet. Equipment Setup and Test Procedure 1) Set the power supply to +24VDC. Disable the power supply output. 2) Connect the positive terminal of the power supply to the VIN PCB pad and the negative terminal to the nearest PGND PCB pad. Connect the positive terminal of the 3A load to the VOUT PCB pad and the negative terminal to the nearest GND0 PCB pad. 3) Connect two DMMs, configured in voltmeter mode, across the input and output terminals to measure the input and output voltage, respectively. 4) Connect two DMMs configured in ammeter mode at the input and output to measure the input current and output current. 5) Enable the power supply. 6) Verify that the output voltmeter displays 5V and the output load current is 3A. 7) If required, vary the input voltage from 18V to 36V, the load current from 0mA to 3A, and verify that the output voltage is 5V. 19-7805; Rev 0; 11/15 MAX17606 Synchronous Flyback Evaluation Kit Detailed Description The MAX17606 EV kit provides a proven design to evaluate the MAX17606. The device is a secondary-side synchronous driver and controller specifically designed for the isolated flyback topology. By replacing the secondary diode with a MOSFET, the MAX17606 improves efficiency and makes thermal management easier. The device EV kit is configured for a 5V output voltage, supplying up to 3A of current. This EV kit uses the peak current mode, pulse-width modulating (PWM) controller IC MAX17597 in a 16-pin TQFN package with an exposed pad as the primary-side flyback controller. This PWM controller varies the duty cycle to compensate for the variation in input voltage (VIN) and the output load to maintain a constant output voltage. The detailed description of flyback design calculations are described in Application Note 5504, “Designing Flyback Converters Using Peak Current-Mode Controllers.” The details of soft-start time programming, programming output voltage, peak-current limit setting, switching frequency setting and the EN/UVLO, OVI settings are described in the MAX17595/6/7 data sheet. Evaluates: MAX17606 The device has a provision to program the turn-off trip point of the secondary synchronous rectifier. An external resistor (R25) connects the drain of the external MOSFET to the IC’s DRN pin. This resistor sets the turn-off trip point with a precise internal current source. Once the synchronous rectifier is turned off, the MAX17606 uses resistor R26 (connected between the TOFF pin and GND0) to program the turn-off time in order to provide immunity from DCM ringing. For the selection of R25 and R26 resistors, refer to the MAX17606 data sheet. Note: The EV kit is shipped with frequency dithering disabled and the DITHER/SYNC pin shorted to SGND by a 0Ω resistor. To set the desired frequency dither, replace R23 with a capacitor of appropriate value, as detailed in the MAX17595/6/7 data sheet. The DITHER /SYNC PCB pad is available for monitoring the signal at the DITHER/ SYNC pin. The MAX17606 has a wide range of input voltage from 4.5V to 36V. The input range makes it simple to drive using one of the following two methods. When the output voltage is 5V and greater, VOUT can be used to directly drive VIN. When the output voltage is less than 5V, use the rectified drain voltage of the secondary synchronous MOSFET to drive VIN. The EV kit circuit has an option for both of these configurations. By default, the EV kit is programmed to run from the rectified drain voltage of the synchronous MOSFET. When running the MAX17606 from the output voltage is required, remove R1 and set R31 to 10Ω. www.maximintegrated.com Maxim Integrated │  2 Evaluates: MAX17606 MAX17606 Synchronous Flyback Evaluation Kit EV Kit Performance Report EFFICIENCY vs. LOAD CURRENT 100 80 OUTPUT VOLTAGE (V) VIN = 36V 60 50 40 30 20 5.03 VIN = 36V EN/UVLO VIN = 24V GATE 5V/div 5V/div VOUT 5.02 2.5A/div IOUT 0 toc3 VIN = 18V 10 0 SOFT START toc2 5V/div VIN = 24V 70 OUTPUT VOLTAGE vs. LOAD CURRENT 5.04 VIN = 18V 90 EFFICIENCY (%) toc1 1000 2000 3000 5.01 0 LOAD CURRENT (mA) 2000 4ms/div 3000 LOAD CURRENT (mA) LOAD TRANSIENT RESPONSE (LOAD CURRENT FROM 1.5A TO 3A ON 5V. 5V output VOUT (AC) 1000 5V output 5V OUTPUT, 3A LOAD CURRENT BODE PLOT toc4 toc5 PHASE 200mV/div GAIN 1A/div IOUT FCR = 7.622KHz, PHASE MARGIN = 73.082° 1mS/div www.maximintegrated.com Maxim Integrated │  3 Evaluates: MAX17606 MAX17606 Synchronous Flyback Evaluation Kit Ordering Information Component Suppliers SUPPLIER WEBSITE Wurth Electronik www.we-online.com Murata Americas www.murata.com Panasonic Corp. www.panasonic.com PART TYPE MAX17606SFBEVKIT# EV Kit #Denotes RoHS compliant. Note: Indicate that you are using the MAX17606SFBEVKIT when contacting these component suppliers. Component List, PCB Layout, and Schematics See the following links for component information, PCB layout, and schematic. ●● MAX17606 EV BOM ●● MAX17606 EV PCB Layout ●● MAX17606 EV Schematic www.maximintegrated.com Maxim Integrated │  4 Evaluates: MAX17606 MAX17606 Synchronous Flyback Evaluation Kit Revision History REVISION NUMBER REVISION DATE 0 11/15 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. 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. ©  2015 Maxim Integrated Products, Inc. │  5 This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX17606_SYNC_FB_EVKIT_A HARDWARE NUMBER: ENGINEER: DESIGNER: DATE: 09/03/2015 ODB++/GERBER: SILK_TOP MAX17606_SYNC_FB EVKIT R1 R25 T1 C1 C2 PGND C26 Q1 Q2 R26 R29 R22 C5 C11 C9 U2 D8 R28 1" 1/4 R27 D5 C17 R4 C12 R3 C18 C16 U3 R19 C14 R5 C13 R23 DITHER R20 SGND R10 R7 OVI R2 R21 R12 R6 EN/UVLO D6 C27 U4 C15 R17 C21 R16 R18 C6 C7 C8 GND0 VOUT D3 R13 R14 R15 C3 D2 R9 R8 R11 Q3 U1 R31 C25 VIN C29 D4 1-888-629-4642 www.maximintegrated.com REV-A 09/15 MS This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX17606_SYNC_FB_EVKIT_A HARDWARE NUMBER: ENGINEER: DESIGNER: DATE: 09/03/2015 ODB++/GERBER: 1" 2/4 TOP This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX17606_SYNC_FB_EVKIT_A HARDWARE NUMBER: ENGINEER: DESIGNER: DATE: 09/03/2015 ODB++/GERBER: 1" 3/4 BOTTOM This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX17606_SYNC_FB_EVKIT_A HARDWARE NUMBER: D1 R24 1" 4/4 C31 C10 R32 C30 C24 ODB++/GERBER: C4 C32 DATE: 09/03/2015 C23 DESIGNER: C22 ENGINEER: SILK_BOT S NO Designation Qty Description Manufacturer Partnumber‐1 Manufacturer Partnumber‐2 1 C1 1 47µF±20%, 50V,ALUMINUM‐ELECTROLYTIC  SMT(CASE_D8) PANASONIC EEEFK1H470XP 2 C2, C22‐C24 4 4.7µF±10% 50V X7R Ceramic capacitor (1210) Murata GRM32ER71H475KA88K KEMET C1210C475K5RAC 3 C3, C27 2 0.22µF±10%,50V, X7R ceramic capacitor (0805) Murata GRM21BR71H224KA KEMET C0805C224K5RAC 4 C4 1 1000pF±10%,100V,X7R ceramic capacitor (0402) Murata GRM155R72A102KA01 5 C5,C14 2 0.1µF±10%, 25V, X7R ceramic capacitor(0603) TDK C1608X7R1E104K080AA Manufacturer Partnumber‐3 TDK CGJ4J2X7R1H224K125AA 6 C6 1 1000pF±5%,50V,  X7R ceramic capacitor (0402) Murata GRM155R71H102JA01D 7 C7, C25, C26 3 2.2µF ±10%,50V,  X7R ceramic capacitor (0805) TDK C2012X7R1H225K 8 C8 1 0.01µF±5%, 50V, X7R ceramic capacitor(0603) KEMET C0603X7R500103JNP KEMET C0603C103J5 9 C9‐C11, C18, C30, C31 6 100µF±20%, 6.3V, X5R ceramic capacitor (1210) Murata GRM32ER60J107ME20 KEMET C1210C107M9PAC VENKEL LTD C1210X5R6R3‐107MNE 10 C12 1 120pF, 1%, 50V, COG ceramic capacitor (0603) KEMET C0603C121K5GAC 11 C13 1 22000pF, 10%, 25V, X7R ceramic capacitor (0603) KEMET C0603C223K3RAC 12 C15,C29,C32 3 OPEN (0603) 13 C16 1 0.22uF±10%, 25V, X7R ceramic capacitor(0603) KEMET C0603C224K3RAC Murata  GRM188R71E224KA8 KEMET C1608X7R1E224K08 14 C17 1 4.7µF ±10%,16V,  X7R ceramic capacitor (0805) Murata GRM21BR71C475KA73 15 C21 1 OPEN (1812) 16 D1 1 OPEN (SOD‐123FL) 17 D2‐D5,D8 5 100V/0.3A, (SOD123), DIODE DIODES INCORPORATED 1N4148W‐7‐F 18 D6 1 6.8V/3UA, (SOD123), DIODE, ZENER ON SEMICONDUCTOR MMSZ5235BT1G 19 Q1 1 100V/22A/69W, POWER‐56(8‐PQFN),POWER‐ TRANSISTOR FAIRCHILD SEMICONDUCTOR  FDMS86102LZ 20  Q2 1 40V/73A/5W, TSDSON‐8 PACKAGE ,POWER‐TRANSISTOR INFINEON BSZ040N04LSG 21 Q3 1 60V/0.5A/0.35W, SOT‐23 ,HIGH VOLTAGE AMPLIFIER FAIRCHILD SEMICONDUCTOR  MMBTA05 22 R1 1 4.7Ω ±5% resistor (0603)  VISHAY DALE CRCW06034R70JN 23 R2,R12,R16,R18, R20,R29,R31 7 OPEN (0603) 24 R3 1 22kΩ ±1% resistor (0603)  VISHAY DALE CRCW060322K0FK 25 R4, R10 2 49.9kΩ ±1% resistor (0603)  VISHAY DALE CRCW060349K9FK PANASONIC ERJ‐3EKF4992V 26 R5 1 280kΩ ±1% resistor (0603)  VISHAY CRCW0603280KFK 27 R6 1 10.7kΩ ±5% resistor (0603)  VISHAY CRCW060310K7FK 28 R7 1 10kΩ ±1% resistor (0603)  VISHAY DALE CHPHT0603K1002FGT 29 R8 1 220Ω ±1% resistor (0603)  VISHAY DALE CRCW0603220RFK 30 R9, R23, R28 3 0Ω ±0% resistor (0603)  ROHM MCR03EZPJ000 31 R11 1 0.02Ω ±1% resistor (2010)  VISHAY DALE CRCW06030000ZS TT ELECTRONICS LRC‐LRF2010LF‐01‐ R020F 32 R13, R14 2 470Ω ±1% resistor (0603)  VISHAY DALE CRCW0603470RFK PANASONIC  ERJ‐3EKF4700 33 R15 1 1.5kΩ ±1% resistor (0603)  VISHAY DALE CRCW06031K50FK 34 R17 1 487Ω ±1% resistor (0603)  PANASONIC ERA‐3AEB4870 35 R19 1 10.5kΩ ±1% resistor (0603)  VENKEL LTD CR0603‐16W‐1052FT 36 R21 1 22.1kΩ ±1% resistor (0805)  VISHAY DALE CRCW080522K1FK 37 R22 1 4.99kΩ ±1% resistor (0603)  38 R24 1 47Ω ±1% resistor (1210)  VISHAY DALE CRCW06034K99FK VISHAY DRALORIC  CRCW121047R0JNEAHP 39 R25 1 2.74kΩ ±1% resistor (0603)  VISHAY DALE CRCW06032K74FK 40 R26 1 100kΩ ±1% resistor (0603)  VISHAY DALE CRCW06031003FK PANASONIC ERJ‐3EKF1003 41 R27 1 1kΩ ±1% resistor (0603)  VISHAY DALE CRCW06031001FK PANASONIC ERJ‐3EKF1001V 42 R32 1 OPEN (1210) 43 T1 1 44 U1 1 MAX17606, 6L THIN SOT23,  Flyback converters MAX17606AZT+ 45 U2 1 Shunt regulator  ,SOT23 46 U3 1 PHOTOTRANSISTOR OPTOCOUPLER DIODES INCORPORATED TLV431BFTA AVAGO TECHNOLOGIES ACPL‐217‐ 56AE 47 U4 1 MAX17597 TQFN16‐EP,PEAK‐CURRENT‐MODE  CONTROLLERFOR FLYBACK MAX17597ATE+ EP13,10‐pin SMT, 9µH,5A, (3‐5):(10‐6):(2‐1) = 1:0.33:0.55 WURTH ELECTRONICS INC. 750342955 PANASONIC ERJ‐3EKF1072V PANASONIC  ERJ‐ERJ‐ 3EKF4991V PANASONIC ERJ‐3GEY0R00 VOUT R31 C25 2.2UF MAX17606 VIN VIN SS NDRV C12 120PF EP FB C13 10.5K 22000PF CS 9 C6 VDRV PGND 0.02 C14 R6 OVI 10.7K 0.01UF R7 SGND 1% R20 16 10K OVI DITHER 4 GATE 4 OPEN OPEN 1 0 0.22UF TLV431BFTA R17 487 GND0 DITHER C21 OPEN PGND GND0 4.7UF GND0 R23 MAX17597ATE+ C17 OPEN C16 U2 1K D5 C15 R16 470 49.9K OPEN R15 R18 2 1% 8 3 3 0 R27 D8 1.5K 1 3 C8 1% VOUT 1% R13 R10 RT VFB 0.1UF 13 EN/UVLO U3 4 R11 VDRV C7 SGND 15 Q2 470 220 C30 100UF C31 100UF GND0 GND0 1 2 3 R14 VDRV 100UF OPEN R28 U3-2 EN/UVLO 5 6 7 8 C18 C29 G S R8 COMP R5 1% 2.74K C27 2.2UF 280K 750342955 A R25 D4 4 3 4 1000PF 10 VIN 6 D 4.99K 5 D3 AUX C11 100UF OPEN 100K 0.22UF Q1 17 C 7 6 7 C10 100UF R29 R26 GND0 R22 R4 R19 0 11 SLOPE 49.9K 1% IN 1 SEC IN 1% R9 1 2 U3-2 6 47 C 9 C 22K OPEN D2 VDRV OPEN R3 U4 A 10 9 10 PRI 100UF A VFB 2 6.8V R24 3 2 7 D1 D6 IN C5 E 3 2 D 14 IN 1000PF C9 GND0 6 TOFF S G 0.22UF B DRN OPEN C4 C 5 IN PGND R2 1 R12 C3 0.1UF Q3 2.2UF 3 50V 5 C26 GND T1 R32 OPEN C 4.7UF 50V 50V C32 OPEN A 4.7UF 22.1K 5 6 7 8 50V R21 C2 4.7UF 2 1 2 3 4.7UF 50V C24 C23 2 C22 C 47UF 2 18V TO 36V + C1 A 1 4.7 GND0 5 VDRV R1 VIN 5V,3A OPEN 1 U1 VOUT GND0