DEMO MANUAL DC2199B-C LTC3765/LTC3766 300W Isolated Forward Converter with Synchronous Rectification DESCRIPTION Demonstration circuit 2199B-C is a 300W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766 chip-set. It produces a regulated 56V, 5.4A output from an input voltage range of 36V to 60V. This circuit was designed to demonstrate the high levels of performance, efficiency, and small solution size attainable using these parts in an active-clamp-reset forward converter power supply, suitable for telecom, industrial, and other applications. It has a 4.7in2 solution footprint area. Synchronous rectification helps to attain an efficiency PERFORMANCE SUMMARY approaching 96%. Secondary-side control eliminates complex opto-coupler feedback, providing fast transient response with minimum output capacitance. For other output requirements, see the LTC3766 data sheet or contact the LTC sales. Design files for this circuit board are available at http://www.linear.com/demo/DC2199B-C L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications are at TA = 25C SYMBOL PARAMETER VIN Input Supply Range VOUT Output Voltage IOUT Output Current Range, Continuous fSW Switching (Clock) Frequency VOUT(P-P) Output Ripple VIN = 48V, IOUT = 30A (20MHz BW) IREG Output Regulation Line and Load (36VIN to 60VIN, 0AOUT to 5.4AOUT) POUT/PIN CONDITIONS MIN TYP 36 MAX 60 56.0 200LFM 0 UNITS V V 5.4 A 200 kHz 100 mVP-P 0.02 % Efficiency (See Figure 3) VIN =48V, IOUT = 5.4A 95.2 % Isolation Basic 1500 VDC Approximate Solution Size Component Area x Top Component Height 4.7in2 x 0.6 Inches dc2199bcfa 1 DEMO MANUAL DC2199B-C OPERATING PRINCIPLES The LTC3765 active clamp forward controller and gate driver is used on the primary and provides start-up, gate drive, and protection functions. Once start-up is accomplished, the LTC3766 high efficiency, secondary-side synchronous forward controller takes over, and provides the LTC3765 with timing information and bias power through a small pulse transformer. When input voltage is applied, the LTC3765 commences soft-start of the output voltage. When the output reaches the RUN threshold, the LTC3766 comes alive and takes control by sending encoded PWM gate pulses to the LTC3765 through T2. These pulses also provide primary bias power efficiently over a wide input voltage range. The transition from primary to secondary control occurs at some fraction of the nominal output voltage. From then on, operation and design is reduced to that of a simple buck converter. Secondary control eliminates delays, tames large-signal overshoot, and reduces output capacitance needed to meet transient response requirements. An optional LC filter stage on the input lowers RMS input current. The filter must have output impedance that is less than the converter input impedance to assure stability. This may require a damping impedance, which is provided by R1. (See Linear Technology Application Note 19 for a discussion of input filter stability.) R1 is coupled through a tiny 2mm x 2mm inductor L1, and provides damping with arbitrarily low source impedance. For bench testing, an electrolytic capacitor has been added at the input terminals to provide suitable ripple current capability. The values selected have a filter resonant frequency that is below the converter switching frequency, thus avoiding high circulating currents in the filter. QUICK START PROCEDURE Demonstration circuit 2199B-C is easy to set up to evaluate the performance of the LTC3765/LTC3766. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below: b.If efficiency measurements are desired, an ammeter capable of measuring 10ADC or a resistor shunt can be put in series with the input supply in order to measure the DC2199B-C's input current. NOTE: When measuring the output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip and ground ring directly across the last output capacitor as shown in Figure 1. c. A voltmeter with a capability of measuring at least 60V can be placed across the input terminals in order to get an accurate input voltage measurement. 1.Set an input power supply that is capable of 36V to 60V to 36V. Then turn off the supply. 2.Direct an airflow of 200LFM across the unit for sustained operation at full load. 3.With power off, connect the supply to the input terminals +VIN and -VIN. a. Input voltages lower than 36V can keep the converter from turning on due to the undervoltage lockout feature of the LTC3765/LTC3766. 2 4.Turn on the power at the input. NOTE: Make sure that the input voltage never exceeds 60V. 5.Check for the proper output voltage of 56V. Turn off the power at the input. 6.Once the proper output voltages are established, connect a variable load capable of sinking 5.4A at 56V to the output terminals +VOUT and -VOUT. Set the current for 0A. a. If efficiency measurements are desired, an ammeter or a resistor shunt that is capable of handling 5.4ADC can be put in series with the output load in order to measure the DC2199B-C's output current. dc2199bcfa DEMO MANUAL DC2199B-C QUICK START PROCEDURE b.A voltmeter with a capability of measuring at least 56V can be placed across the output terminals in order to get an accurate output voltage measurement. 7.Turn on the power at the input. 8.Once the proper output voltage is again established, adjust the load within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other desired parameters. NOTE. If there is no output, temporarily disconnect the load to make sure that the load is not set too high. + - + VIN - + + - VOUT IOUT + - LOAD - Figure 1. Proper Measurement Equipment Setup 0.96 16 0.94 15 0.94 14 0.9 13 0.88 12 0.86 11 0.84 10 0.82 0.8 0.78 0.76 0 1 2 3 4 LOAD CURRENT (A) 9 36VIN 8 48VIN 60VIN 7 Pd, 48VIN 6 5 6 POWER DISSIPATION (W) VIN IIN EFFICIENCY + - dc2199bc F02 Figure 2. Efficiency and Power Dissipation dc2199bcfa 3 DEMO MANUAL DC2199B-C QUICK START PROCEDURE Figure 3. Output Ripple at 48VIN and 5.4AOUT (100mV, 2s/DIV, 20MHz) Figure 4. Transient Response Waveform at 48VIN and 2.7A to 5.4A to 2.7AOUT (2A, 1V, 200s/DIV) 4 dc2199bcfa DEMO MANUAL DC2199B-C QUICK START PROCEDURE Figure 5. Thermal Map, Front Side at 48VIN and 5.4AOUT (TA = 25C, 200LFM) Figure 6. Thermal Map, Back Side at 48VIN and 5.4AOUT (TA = 25C, 200LFM) dc2199bcfa 5 DEMO MANUAL DC2199B-C PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 2 C1, C22 Cap., Alum., Elect., 33F, 80V, CAP-10x10 PANASONIC, EEHZA1K330P 2 5 C2, C3, C4, C5, C6, C34 CAP., X7R, 4.7F, 100V, 10%,1210 MURATA, GRM32DC72A475KE01L 3 1 C10 CAP., X7R, 4.7nF, 630V, 10%,1206 MURATA, GRM31A7U2J472KW31 4 1 C11 CAP., X7R, 0.015F, 25V, 10%, 0603 AVX, 06033C153KAT2A 5 2 C24, C71 CAP., X7R, 1.0F, 16V, 10%, 0805 MURATA, GRM21BR71C105KA01 6 2 C25, C26 Cap., Alum., Elect., 33F, 63V, CAP-8x10 PANASONIC, EEHZA1J330P 7 1 C30 CAP., X7R, 2200pF, 250V, 10%,1812 MURATA, GA343QR7GD222KW01L 8 1 C51 CAP., C0G, 220pF, 630V, 5%,1206 MURATA, GRM31A5C2J221JW01 9 4 C55, C73, C80, C119 CAP., X7R, 1nF, 25V, 10%, 0603 MURATA, GRM188R71E102KA01 10 1 C66 CAP., X7R, 0.047F, 200V, X7R, 10%, 1206 MURATA, GRM31CR72D473KW03 11 2 C72, C102 CAP., X7R, 0.1F, 25V, 10%, 0805 AVX, 08053C104KAT2A 12 1 C75 CAP., NPO, 100pF, 25V, 5%, 0603 AVX, 06033A101JAT2A 13 1 C76 CAP., X7R, 3.3nF, 25V, 10%, 0603 AVX, 06033C332KAT2A 14 1 C77 CAP., X7R, 10F, 25V, 10%, 1206 AVX, 12063C106KAT2A 15 1 C78 CAP., NPO, 0.033F, 25V, 5%, 0805 TDK, TDK, C2012C0G1E333J125AA 16 1 C79 CAP., X7R, 4.7nF, 25V, 10%, 0603 MURATA, GRM188R71E472KA01 17 1 C101 CAP., NPO, 220pF, 25V, 5%, 0603 AVX, 06033A221JAT2A 18 1 C103 CAP., NPO, 1000pF, 25V, 5%, 0603 AVX, 06033A102JAT2A 19 1 C105 CAP., X7R, 0.22F, 16V, 10%, 0603 MURATA, GRM188R71C224KA01 20 1 C106 CAP., COG, 150pF, 250V, 5%, 0603 TDK, C1608C0G2E151J080AA 21 1 C111 CAP., X7R, 0.22F,50V, 10%, 0805 AVX, 08055C224KAT2A 22 1 C112 CAP., X7R, 0.22F, 250V, 10%, 1206/1210 TDK C3225X7R2E224K 23 1 C113 CAP., X7R, 0.033F, 25V, 10%, 0603 AVX, 06033C333KAT2A 24 1 C116 CAP., X7R, 4.7F, 25V,10%,1206 AVX, 12063C475KAT2A 25 1 C118 CAP., NPO, 470pF, 5%, 0603 AVX, 06033A471JAT2A 26 2 D1,D34 DIODE ULTRA FAST 1A 200V SMP VISHAY, ES1PD-M3 / 84A 27 2 D29, D30 DIODE SCHOTTKY 60V 0.5A, SOT23 DIODES INC, ZHCS506TA 28 2 D37, D38 Diode, BAS21, SOT23 DIODES INC., BAS21-13-F 29 1 D40 DIODE, 1N4148WS, SOD323 VISHAY, 1N4148WS-E3-08 30 1 D41 DIODE, TVS,170V, SMB FAIRCHILD, SMBJ170A 31 1 D42 DIODE, ZENER, 27V, SOD323 DIODES INC., BZT52C27S-7-F 32 1 L1 INDUCTOR, 1.0H, 20% COILCRAFT, XPL2010-102ML 33 1 L2 INDUCTOR, 2.0H, 20% VISHAY, IHLP4040DZER2R0M11 34 1 L3 INDUCTOR, 33H, 10% Wurth, 7443643300 35 1 L4 INDUCTOR, 680H, DO1606T COILTRONICS, SD25-681 36 2 Q8, Q9 MOSFET, N-CH 150V, POWERPAK-SO-8 INFINEON, BSC190N15NS3 G 37 2 Q12, Q13 MOSFET, N-CH, 120V, POWERPAK-SO-8 VISHAY, Si7190DP 38 2 Q14, Q15 MOSFET, N-CH, 120V, POWERPAK-SO-8 VISHAY, Si7172DP 39 1 Q27 TRANS., NPN, 60V, 1A, SOT-89 DIODES INC., FCX491TA 40 1 Q28 MOSFET, N-CH, SUPER, SOT-6 FAIRCHILD, FDC2512-NL 41 1 Q29 MOSFET, P-CH, IRF6217, POWERPAK-SO-8 IR, IRF6217TRPBF 6 dc2199bcfa DEMO MANUAL DC2199B-C PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 42 43 1 R1 RES., CHIP, 0.33, 1/4W, 5%, 2512 PANASONIC, ERJ-1TRQJR33U 1 R7 DIODE SCHOTTKY 45V 0.5A, SOD323 CENTRAL SEMI., CMDSH05-45 44 2 R4, R5 RES., CHIP, 33.2K, 1W, 1%, 2512 PANASONIC, ERJ-1TYF3322U 45 1 R18 RES., 95.3K, 1/8W, 1%, 0805 VISHAY, CRCW080595K3FKEA 46 1 R22 RES., 3.48K, 1/16W, 1%, 0603 VISHAY, CRCW06033K48FKEA 47 2 R23, R24 RES., CHIP, 51, 1/4W, 5%, 1206 VISHAY, CRCW120651R0JKEA 48 1 R29 RES., CHIP, 100K, 1/8W, 5%, 0805 VISHAY, CRCW0805100KJNEA 49 1 R41 RES., CHIP, 56.2K, 1/16W, 1%, 0603 VISHAY, CRCW060356K2FKEA 50 1 R42 RES., CHIP, 1K, 1/16W, 1%, 0603 VISHAY, CRCW06031K00FKEA 51 1 R46 RES., CHIP, 604, 1/16W, 1%, 0603 VISHAY, CRCW0603604RFKEA 52 1 R53 RES., CHIP, 6.8, 1/2W, 1%, 1206 PANASONIC, ERJ-8RQF6R8V 53 1 R68 RES., CHIP, 2.15K, 1/16W, 1%, 0603 VISHAY, CRCW06032K15FKEA 54 1 R69 RES., CHIP, 46.4K, 1/16W, 1%, 0603 VISHAY, CRCW060346K4FKEA 55 2 R75, R77 RES., CHIP, 6.81K, 1/2W, 1%, 1210 VISHAY, CRCW12106K81FKEA 56 6 R101, R106, R107, R148, R149, R151 RES., CHIP, 100, 1/16W, 1%, 0603 VISHAY, CRCW0603100RFKEA 57 1 R102 RES., CHIP, 0.008, 3W, 1%, 1225 SUSUMU, KRL6432D-M-R008-F-T5 58 1 R108 RES., CHIP, 2.37K, 1/4W, 1%, 1206 VISHAY, CRCW12062K37FKEA 59 1 R109 RES., CHIP, 10K, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA 60 1 R110 RES., CHIP, 1.20, 1/2W, 1%, 1206 SUSUMU, RL1632S-1R20-F 61 1 R114 RES., CHIP, 28.7K, 1/16W, 1%, 0603 VISHAY, CRCW060328K7FKEA 62 1 R115 RES., CHIP, 49.9K, 1/4W, 1%,1206 VISHAY, CRCW120649K9FKEA 63 1 R117 RES., CHIP, 12.7K, 1/16W, 1%, 0603 VISHAY, CRCW060312K7FKEA 64 1 R118 RES., CHIP, 681K, 1/16W, 1%, 0603 VISHAY, CRCW0603681KFKEA 65 1 R121 RES., CHIP, 133K, 1/16W, 1%, 0603 VISHAY, CRCW0603133KFKEA 66 1 R123 RES., CHIP, 39.2K, 1/16W, 1%, 0603 VISHAY, CRCW060339K2FKEA 67 1 R125 RES., CHIP, 17.4K, 1/16W, 1%, 0603 VISHAY, CRCW060317K4FKEA 68 1 R127 RES., CHIP, 10K, 1/4W, 1%, 1206 VISHAY, CRCW120610K0FKEA 69 1 R136 RES., CHIP, 0.004, 1W, 1%, 1225 SUSUMU, KRL6432D-M-R004-F-T5 70 1 R137 RES., CHIP, 10K, 1/4W, 5%, 1206 VISHAY, CRCW120610K0JKEA 71 1 R139 RES., CHIP, 26.7K, 1/16W, 1%, 0603 VISHAY, CRCW060326K7FKEA 72 1 R140 RES., CHIP, 178, 1/8W, 1%, 0805 PANASONIC, ERJ-6ENF1780V 73 1 R150 RES., CHIP, 14.3K, 1/16W, 1%, 0603 VISHAY, CRCW060314K3FKEA 74 1 R153 RES., CHIP, 7.5K, 1/16W, 5%, 0603 VISHAY, CRCW06037K50JKEA 75 1 R154 RES., CHIP, 2.2, 1/4W, 5%, 1206 VISHAY, CRCW12062R20JKEA 76 1 T1 TRANSFORMER, 4T:4T:2T CHAMPS TECH., P26R6-0410-S02 77 1 T2 TRANSFORMER, 1.25:1 PULSE, PA3493NL 78 1 U1 I.C. LTC3765EMSE, MSOP-16 PIN LINEAR TECH., LTC3765EMSE#PBF 79 1 U2 I.C. LTC3766EGN, SSOP-GN28 LINEAR TECH., LTC3766EGN#PBF dc2199bcfa 7 DEMO MANUAL DC2199B-C PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Additional Demo Board Circuit Components 1 0 C7, C31, C33, C68 CAP., OPT, 7343 OPT 2 0 C8, C9, C18, C19, C12, C13, C14, C16, C20, C70 CAP., OPT, 0603 OPT 3 0 C17, C69 CAP., OPT,1206 OPT 4 0 C21, C15, C114 CAP., OPT, 0805 OPT 5 0 C23 CAP., OPT, CAP-SVPF-E12 OPT 6 1 C74 CAP, 0 0HM, JUMPER, 0603 VISHAY, CRCW06030000Z0EA 7 0 D2, D4, D35 DIODE, OPT, SOD323 OPT 8 0 D27, D28 DIODE, OPT, SOT23 OPT 9 0 Q1, Q2 MOSFET, OPT, SOT23-6 OPT 10 0 Q3 MOSFET, OPT, SOT23 OPT 11 0 Q4 MOSFET, OPT, D-PAK OPT 12 0 Q31 TRANS, OPT, SOT23 OPT 13 0 Q11, Q23, Q24 MOSFET, OPT, POWERPAK-SO-8 OPT 15 7 R2, R3, R8, R43, R49, R103, R111, R112, R122, R146 RES., CHIP, 0 OHM, 0603 VISHAY, CRCW06030000Z0EA 14 0 R6, R9, R11, R12, R19, R25, R26, R27, R28, RES., OPT, 0603 R30, R31, R32, R33, R34, R35, R113, R119, R120, R124, R126, R138, R147 OPT 17 1 R10 RES., CHIP, 0.00 OHM, 1225 TEPRO, RN5326 16 0 R13, R14, R15 RES., OPT, 2512 OPT 18 0 R17, R51, R52, R116 RES., OPT,1206 OPT 19 0 R76, R84, R152 RES., OPT, 0805 OPT 20 0 T3 TRANSFORMER, 1:100, CT02-100 OPT 21 0 U3 I.C. OPT, SO16 OPT TESTPOINT, TURRET, .094" MILL-MAX, 2501-2-00-80-00-00-07-0 Hardware: For Demo Board Only 1 4 E1, E2, E3, E4 2 3 E5, E6, E7 TESTPOINT, TURRET, .061" MILL-MAX, 2308-2-00-80-00-00-07-0 3 0 J1 HEADER, OPT, 2X7PIN, 0.079CC OPT, MOLEX, 87331-1420 4 2 J3, J4 STUD, TEST PIN PEM, KFH-032-10 5 4 J3, J4 (2 EACH) NUT, BRASS, #10-32 ANY #10-32 6 2 J3, J4 WASHER, STAR #10 BRASS NICKEL ANY, #10EXT BZ TN 7 2 J3, J4 Ring, Lug Ring # 10 KEYSTONE, 8205 8 4 (STAND-OFF) STAND-OFF, NYLON 0.25" (SNAP ON) KEYSTONE, 8831 8 dc2199bcfa A B C -VIN Q28 FDC2512 D29 ZHCS506 C113 33nF 2512 R1 0.33 3 RCORE SSFLT RUN VCC R150 14.3K 11 13 12 4x4.7uF 100V 1210 C3,4,5,6 5 NOTE: 4.7uF 25V AVX, 12063C475KAT2A (X7R 1206) 2.2nF 250V Murata GA343QR7GD222KW01L (X7R 1812) 33uF 63V PANASONIC, EEHZA1J330P (8x10mm) 33uF 80V PANASONIC, EEHZA1K330P (10x10mm) D41 170V FAIRCHILD, SMBJ170A L1 Coilcraft XPL2010-102ML L2 Vishay IHLP4040DZER2R0M11 L3 Wurth 7443643300 L4 Coiltronics SD25-681 0.004 Ohm Susumu KRL6432D-M-R004-F-T5 (1225) 0.008 Ohm Susumu KRL6432D-M-R008-F-T5 (1225) R110 SUSUMU, RL1632S-1R20-F (1206) T1 Champs, P26R6-0410-S02 T2 Pulse, PA3493NL C55 1nF L2 2.0uH C2 4.7uF 100V 1210 C24 1uF 16V 0805 SGNDP 2x33uF 80V + C1,22 R18 95.3K 0805 SGNDP R22 3.48K -VIN 36V-60VIN +VIN L1 R29 100K 0805 VIN VIN U1 R117 12.7K 4 AG IN- IN+ R149 100 D30 R109 10K C102 0.1uF 0805 R101 100 Q29 IRF6217 ND C66 47nF 200V 1206 1uF 16V 0805 C71 C112 0.22uF 200V 1210 C11 15nF D34 ES1PD R140 178 1/8W 0805 4 1T 6 -VOUT Q14,15 Si7172DP PA3493NL T2 R110 1.20 1206 1/2W 3 1 250V 1812 C30 2.2nF 1.25T -VIN 10T 13 9 BAS21 D37 L4 RS- 3 R108 C73 1nF R118 681K 25 26 PT- PT+ 28.7K R114 C10 4.7nF 630V 1206 R154 2.2 1206 D1 ES1PD SGND PGND D41 170V R153 7.5K 2.37K 1206 RS+ SGND 0.008 1225 R102 R23,24 2x51 1206 C51 220pF 630V 1206 PGND C116 4.7uF 1206 VAUX +VOUT FG 680uH D38 BAS21 R121 133K COG 0805 C78 33nF FG R77 6.81K 1210 R75 6.81K 1210 LTC3766EGN R123 39.2K VCC PGND C77 10uF 1206 VCC Q27 RSFCX491TA R7 CMDSH05-45 R69 46.4K 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. C103 1.0nF C75 100pF LT SCALE = NONE DAVID B. 6 13 12 __ R127 10K 1206 DATE: N/A SIZE DATE 1 SHEET 1 LTC3765EMSE / LTC3766EGN28 DC2199B-C OF 1 REV. 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 8-18-14 ACTIVE CLAMP FORWARD CONVERTER WITH DIRECT FLUX LIMIT TECHNOLOGY R42 1K C76 3.3nF -VOUT 56VOUT / 5.4A Wednesday, November 09, 2016 IC NO. R46 604 R41 56.2K SGND R115 49.9K 1206 +VOUT -VOUT 2x33uF 63V +VOUT DAVID B. +VOUT APPROVED PRODUCTION 2 1 DESCRIPTION REVISION HISTORY REV + C25,26 ECO TITLE: SCHEMATIC C79 4.7nF R68 2.15K FB VS- VS+ R107 100 RS+ R106 100 APPROVALS R125 17.4K LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. C105 0.22uF VAUX PGND 1206 R137 10K 1210 C34 4.7uF 100V 2 CUSTOMER NOTICE U2 R4,5 33.2K 2512 C111 0.22uF 50V 0805 D42 27V Q12,13 Si7190DP L3 33uH Simplified Schematic (without Unneeded Components) 100 C72 SGNDP PGNDP C106 150pF 250V R53 6.8 1206 6 C101 0.1uF 220pF 0805 R136 0.004 1225 R151 ZHCS506 4 16 15 SGNDP C119 1nF C80 1nF Unless otherwise specified: All resistors are in ohms 0603. All capacitors are in microfarads 0603. All capacitors are 25V. 1/16W = 0402, 1/10W = 0603, 1/8W = 0805, 1/4W = 1206, 1W = 2512. R139 26.7K UV LTC3765EMSE C118 470pF R148 100 Q8,9 BSC190N15NS3 ND 4T 2 T1 P26R6-0410-S02 8 2T 14 1 3 28 1.0uH 4 17 D GND 17 PGND 1 FS/UV 10 GND2 9 14 NDRV 2 PG 8 IS+ DELAY 6 7 ISISMAG 5 20 FGD/SWB RUN 8 23 SW 3 VSEC SS 9 REGSD 16 2 FG GND 14 24 PHASE 5 SG 22 VIN IPK 10 PGND 27 VAUX 21 NDRV MODE 4 VCC FS/SYNC 15 SGD 19 18 ISITH 7 IS+ VSOUT 11 5 A B C D DEMO MANUAL DC2199B-C SCHEMATIC DIAGRAM dc2199bcfa 9 A B C 1 D40 SGNDP R22 3.74K 2 33uF 80V + C22 R18 95.3K 0805 -VIN 1N4148WS E7 E2 33uF 80V + C1 PSS VCP 3 C24 1uF 16V 0805 SGNDP C55 1nF C113 33nF C6 4.7uF 100V 1210 Q28 FDC2512 D29 ZHCS506 C2 4.7uF 100V 1210 C4 4.7uF 100V 1210 5 R29 100K 0805 VIN 1210 C5 4.7uF 100V VIN IS+ D27 OPT R139 26.7K UV 1 C118 470pF R148 100 R117 12.7K 4 AG IN- IN+ 4 16 15 4 FG AS R109 10K C102 0.1uF 0805 AG1 R8 0 AG SGNDP C119 1nF D30 ZHCS506 C80 1nF AS 1 SGND Q3 OPT Q8 BSC190N15NS3 Q9 BSC190N15NS3 Q11 OPT R149 100 R9 0 R76 OPT 0805 D28 OPT LTC3765EMSE U1 0 R49 3 3 R84 4 OPT 0805 2 1 Unless otherwise specified: All resistors are in ohms 0603. All capacitors are in microfarads 0603. All capacitors are 25V. 1/16W = 0402, 1/10W = 0603, 1/8W = 0805, 1/4W = 1206, 1W = 2512. RCORE SSFLT RUN VCC R150 14.3K 11 13 12 3 C3 4.7uF 100V 1210 NOTE: 4.7uF 25V AVX, 12063C475KAT2A (X7R 1206) 2.2nF 250V Murata GA343QR7GD222KW01L (X7R 1812) 33uF 63V PANASONIC, EEHZA1J330P (8x10mm) 33uF 80V PANASONIC, EEHZA1K330P (10x10mm) D41 170V FAIRCHILD, SMBJ170A L1 Coilcraft XPL2010-102ML L2 Vishay IHLP4040DZER2R0M11 L3 Wurth 7443643300 L4 Coiltronics SD25-681 0.004 Ohm Susumu KRL6432D-M-R004-F-T5 (1225) 0.008 Ohm Susumu KRL6432D-M-R008-F-T5 (1225) R110 SUSUMU, RL1632S-1R20-F (1206) T1 Champs, P26R6-0410-S02 T2 Pulse, PA3493NL RUN -VIN 36V-60VIN E1 L2 2.0uH T3 OPT 0 2512 R10 3 2 +VIN 2512 1 3 -VIN 100 R151 250V 1812 C30 2.2nF 3 1.25T 1 ND T2 C11 15nF D34 ES1PD C66 47nF 200V 1206 4 1T 6 1uF 16V 0805 C71 -VOUT RS- R52 OPT 1206 4 R140 178 1/8W 0805 3 C112 0.22uF 200V 1210 +VOUT 25 26 R114 C73 1nF RUN PT- PT+ 28.7K R118 681K SGND 1206 R24 R23 R121 133K SSS R111 0 C8 OPT C10 4.7nF 630V 1206 R154 2.2 1206 D1 ES1PD 51 1206 51 R146 0 PGND 2.37K 1206 R108 SGND R102 RS+ FG RS- 0.008 1225 PT- 321 8765 CLAMP C51 220pF 630V 1206 D41 SMBJ170A SW Q15 Si7172DP Q14 Si7172DP SWB Q24 OPT PGND VA R112 0 R5 33.2K 2512 C34 4.7uF 100V 1210 D42 CMDZ5254B RUN CMDSH05-45 2 1 R147 VPK OPT R7 C111 0.22UF R137 10K Q27 1206 PGND 0805 FCX491 1 R6 VCC R138 OPT OPT R116 0603 VAUX R113 OPT 1206 OPT LTC3766EGN R122 0 R123 39.2K R124 OPT R43 0 VCC R69 46.4K SYNC 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE U2 R4 33.2K 2512 2 OPT 16V 7343 + C31 1.0nF C103 R125 17.4K SCALE = NONE DAVID B. LT APPROVALS ITH- C75 100pF ITH SGND DATE: N/A SIZE C25 SGND C9 OPT DATE 10-26-16 1 SHEET 1 LTC3765EMSE / LTC3766EGN DC2199B-C 2 OF 2 REV. ACTIVE CLAMP FORWARD CONVERTER WITH DIRECT FLUX LIMIT 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only R46 604 Wednesday, November 09, 2016 IC NO. R127 10K 1/4W 1206 R42 1K C76 3.3nF -SENSE +SENSE - -VOUT R41 56.2K +VOUT E6 E5 E4 J4 +VOUT + 56VOUT / 5.4A OPT 16V 7343 TECHNOLOGY PGND C77 10uF 1206 VS- J3 + C68 R115 49.9K 1/4W 1206 C74 0 33uF 63V + C26 -VOUT OPT C23 VCC VS+ + +VOUT DAVID B. E3 APPROVED PRODUCTION 2 1 DESCRIPTION REVISION HISTORY REV TITLE: SCHEMATIC C79 4.7nF OPT OPT R120 R119 6 13 12 R68 2.15K FB VS- VS+ OPT C70 IS+ R126 OPT OPT 16V 7343 __ ECO + C7 VCC R107 100 RS+ R106 100 RS- OPT 16V 7343 + C33 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 0.22uF 0805 COG C105 4 L3 33uH Q12 Si7190DP Q13 Si7190DP Q23 OPT -VOUT R103 0 FG R77 6.81K 1210 R75 6.81K 1210 321 8765 C78 33nF Full Schematic, Page 1 R110 1.20 1206 1/2W Q31 OPT 4 Q29 IRF6217 0 R51 OPT 1206 C69 OPT 630V 1206 R2 0 R3 TRANS-PA3493NL SGNDP 1 AG1 AG C106 150pF 250V PGNDP C101 0.1uF 220pF 0805 R101 100 R53 6.8 1206 13 6 C72 R136 0.004 1225 123 5678 ND 9 2 14 T1 P26R6-0410-S02 8 3 2 1 D 1 3 6 5 2 1 4 1 1.0uH 14 GND 17 PGND 1 FS/UV 10 GND2 9 NDRV 2 PG 8 IS+ DELAY 6 7 ISISMAG 5 23 R1 0.33 3 2 21 L1 1 3 5 6 7 8 1 2 3 1 2 20 FGD/SWB RUN 8 3 VSEC SS 9 2 2 4 5 SW REGSD 16 24 VAUX PHASE FG GND 14 22 VIN IPK 10 SG PGND 27 2 3 28 15 NDRV MODE 4 VCC FS/SYNC 17 7 1 SGD 19 ISITH 18 IS+ VSOUT 10 11 5 A B C D DEMO MANUAL DC2199B-C SCHEMATIC DIAGRAM dc2199bcfa Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. A B C 5 AG C18 OPT PGNDP AG 2 CRX 5 2 Q2 OPT PGNDP 3 4 6 1 VCCP Q1 4 AG1 OPT C19 7 C16 OPT C14 OPT AG1 PGNDP 5 2 OPT Q1 VCC 3 4 6 1 C15 OPT 0805 C20 OPT ACTIVE SNUBBER D2 OPT RS- OPTIONAL CIRCUITS SO16 U3 OPT AC DRIVER C13 OPT R12 OPT OPT C12 FG 5 R11 OPT 4 A1 VSS 1 16 VDD 3 B1 RES VSS1 8 2 1 VSS2 15 4 R19 OPT RS- SW OPT 1 SW 3 CLAMP C21 OPT 0805 VA VA Full Schematic, page 2 2 R15 OPT 2512 D4 R17 OPT 1206 R14 OPT 2512 +VOUT Q4 OPT R13 OPT 2512 C17 OPT 200V 1206 3 R31 OPT VS- 1 3 PGND R153 7.5K CUSTOMER NOTICE D38 BAS21 680uH 2 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 14 13 12 11 10 9 8 7 6 5 4 3 2 1 OPT HD2X7-MOLEX 14 13 12 11 10 9 8 7 6 5 4 3 2 1 J1 OPT D35 1 OPT 0805 LT SCALE = NONE DAVID B. C114 OPT 0805 PGND VPK DATE: N/A SIZE 1 SHEET 2 LTC3765EMSE / LTC3766EGN DC2199B-C 2 OF 2 REV. ACTIVE CLAMP FORWARD CONVERTER WITH DIRECT FLUX LIMIT TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 1 Wednesday, November 09, 2016 IC NO. TITLE: SCHEMATIC R152 PEAK CHARGE VCC APPROVALS VA R33 OPT SYNC VAUX R32 OPT R28 OPT VS+ PT- R27 OPT OPT R34 OPT R25 ITH PSS SGNDP 2 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. BAS21 D37 SYNC PT- VS+ ITH C116 4.7uF 1206 R30 OPT ITH- L4 R35 OPT R26 OPT PSS SGNDP SSS VCC FROM T1 VS- ITH- SSS SGND 3 1 D 5 A B C D DEMO MANUAL DC2199B-C SCHEMATIC DIAGRAM dc2199bcfa 11 DEMO MANUAL DC2199B-C DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user's responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright (c) 2004, Linear Technology Corporation 12 Linear Technology Corporation dc2199bcfa LT 1116 REV A * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2016