Linear Technology LTC3765 Guida rapida alla configurazione

dc2199aafa

DEMO MANUAL DC2199A-A

DESCRIPTION

LTC3765/LTC3766

360W Isolated Forward Converter

with Synchronous Rectification

Demonstration circuit 2199A-A is a 360W isolated for-

ward converter with synchronous rectification featuring

the LTC3765/LTC3766. It produces a regulated 12V, 30A

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 attain-

able using these parts in an active-clamp-reset forward

converter power supply, suitable for telecom, industrial,

and other applications. It has a 4.7in2solution footprint

area. Synchronous rectification helps to attain an effi-

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.

PERFORMANCE SUMMARY

ciency exceeding 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 LT C sales.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2199A-A

Specifications are at TA= 25°C

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VIN Input Supply Range 36 60 V

VOUT Output Voltage 11.76 12.0 12.24 V

IOUT Output Current Range, Continuous 200LFM 0 30 A

fSW Switching (Clock) Frequency 200 kHz

VOUT(P-P) Output Ripple VIN = 24V, IOUT = 30A (20MHz BW) 60 mVP-P

IREG Output Regulation Line and Load (36VIN to 60VIN, 0AOUT to 30AOUT) ±0.02 %

POUT/PIN Efficiency (See Figure 3) VIN =48V, IOUT = 30A 96 %

Isolation Basic 1500 VDC

Approximate Solution Size Component Area × Top Component Height 4.7in2× 0.6 Inches

dc2199aafa

DEMO MANUAL DC2199A-A

OPERATING PRINCIPLES

QUICK START PROCEDURE

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 accom-

plished, 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

Demonstration circuit 2199A-A is easy to set up to evalu-

ate the performance of the LTC3765/LTC3766. Refer to

Figure 1 for proper measurement equipment setup and

follow the procedure below:

NOTE:Whenmeasuringtheoutputvoltageripple,caremust

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.

1. Set an input power supply that is capable of 36V to 60V

to 36V. Then turn off the supply.

2. Directanairflowof200LFMacrosstheunitforsustained

operation at full load.

3. Withpower off, connect the supply tothe 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.

buckconverter.Secondarycontroleliminatesdelays,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 × 2mm inductor L1, and provides damping

with arbitrarily low source impedance. For bench testing,

an electrolytic capacitor has been added at the input ter-

minals 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.

b. If efficiency measurements are desired, an ammeter

capable of measuring 15ADC or a resistor shunt can

be put in series with the input supply in order to

measure the DC2199A-A’s input current.

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.

4. Turn on the power at the input.

NOTE: Make sure that the input voltage never ex-

ceeds 60V.

5. Check for the proper output voltage of 12V. Turn off

the power at the input.

6. Once the proper output voltages are established, con-

nect a variable load capable of sinking 30A at 12V 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 30ADC

can be put in series with the output load in order to

measure the DC2199A-A’s output current.

dc2199aafa

DEMO MANUAL DC2199A-A

QUICK START PROCEDURE

b. Avoltmeter with acapability of measuring at least 12V

can be placed across the output terminals in order

to get an accurate output voltage measurement.

7. Turn on the power at the input.

NOTE. If there is no output, temporarily disconnect the

load to make sure that the load is not set too high.

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.

Figure 1. Proper Measurement Equipment Setup

Figure 2. Efficiency and Power Dissipation

IOUT (A)

EFFICIENCY? (%)

POWER DISSIPATION (W)

10 205 15

dc2199aa F02

3025

36VIN

48VIN

60VIN

48VIN_PD

dc2199aafa

DEMO MANUAL DC2199A-A

QUICK START PROCEDURE

Figure 3. Output Ripple at 48VIN and 30AOUT (50mV, 10A, 2µs/DIV, 20MHz)

Figure 4. Transient Response Waveform at 48VIN and 15A to 30A to 15AOUT (10A, 500mV, 200µs/DIV)

dc2199aafa

DEMO MANUAL DC2199A-A

QUICK START PROCEDURE

Figure 5. Thermal Map, Front Side at 48VIN and 30AOUT (TA= 25°C, 200LFM)

Figure 6. Thermal Map, Back Side at 48VIN and 30AOUT (TA= 25°C, 200LFM)

dc2199aafa

DEMO MANUAL DC2199A-A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 2 C1, C22 Cap., Alum., Elect., 33µF, 80V, CAP-10X12.5 PANASONIC, EEHZA1K330P

2 5 C2, C3, C4, C5, C6 CAP., X7R, 4.7µF, 100V, 10%, 1210 MURATA, GRM32ER72A475KE14

3 4 C7, C31, C33, C68 CAP., POSCAP, 150µF, 16V, 20%, 7343 PANASONIC, 16TQC150MYF

4 1 C10 CAP., X7R, 2.2nF, 630V, 5%, 1206 MURATA, GRM31A7U2J222JW31

5 1 C11 CAP., X7R, 0.015µF, 25V, 10%, 0603 AVX, 06033C153KAT2A

6 2 C24, C71 CAP., X7R, 1.0µF, 16V, 10%, 0805 MURATA, GRM21BR71C105KA01

7 1 C30 CAP., X7R, 2200pF, 250V, 10%, 1812 MURATA, GA343QR7GD222KW01L

8 1 C34 CAP., X5R, 22µF, 16V, 20%, 1206/1210 MURATA, GRM32ER71C226MEA8L

9 1 C51 CAP., C0G, 470pF, 630V, 5%, 1206 MURATA, GRM31A5C2J471JW01

10 1 C66 CAP., X7R, 0.047µF, 200V, X7R, 10% 1206 MURATA, GRM31CR72D473KW03

11 1 C69 CAP., X7R, 1.5nF, 630V, 5%, 1206 MURATA, GRM31A7U2J152JW31

12 2 C70, C76 CAP., X7R, 3.3nF, 25V, 10%, 0603 AVX, 06033C332KAT2A

13 2 C72, C102 CAP., X7R, 0.1µF, 25V, 10%, 0805 AVX, 08053C104KAT2A

14 4 C55, C73, C80, C119 CAP., X7R, 1nF, 25V, 10%, 0603 MURATA, GRM188R71E102KA01

15 1 C75 CAP., NPO, 100pF, 25V, 5%, 0603 AVX, 06033A101JAT2A

16 1 C77 CAP., X7R, 4.7µF, 25V, 10%, 1206 AVX, 12063C475KAT2A

17 1 C78 CAP., NPO, 0.033µF, 25V, 5%, 0805 TDK, C2012C0G1E333J

18 1 C79 CAP., X7R, 4.7nF, 25V, 10%, 0603 MURATA, GRM188R71E472KA01

19 1 C101 CAP., NPO, 220pF, 25V, 5%, 0603 AVX, 06033A221JAT2A

20 1 C106 CAP., COG, 150pF, 250V, 5%, 0603 TDK, C1608C0G2E151J080AA

21 1 C112 CAP., X7R, 0.22µF, 250V, 10%, 1206/1210 TDK C3225X7R2E224K

22 1 C113 CAP., X7R, 0.033µF, 25V, 10%, 0603 AVX, 06033C333KAT2A

23 1 C118 CAP., NPO, 1500pF, 5%, 0603 AVX, 06033A152JAT2A

24 2 D1, D34 DIODE ULTRA FAST 1A, 200V, SMP VISHAY, ES1PD-M3 / 84A

25 3 D27, D29, D30 DIODE SCHOTTKY 60V, 0.5A, SOT23 DIODES INC, ZHCS506TA

26 1 D40 DIODE, 1N4148WS, SOD323 VISHAY, 1N4148WS-E3-08

27 1 L1 INDUCTOR, 1.0µH, 20% COILCRAFT, XPL2010-102ML

28 1 L2 INDUCTOR, 2.0µH, 20% VISHAY, IHLP4040DZER2R0M11

29 1 L3 INDUCTOR, 3.3µH, 10% COILCRAFT, SER2915L-332KL

30 2 Q8, Q9 MOSFET N-CH 150V, POWERPAK-SO-8 INFINEON, BSC190N15NS3 G

31 4 Q12, Q13, Q14, Q15 MOSFET N-CH 80V, POWERPAK-SO-8 INFINEON, BSC028N06NS3

32 1 Q27 TRANS., NPN 40V, 1A, SOT-89 DIODE INC., FCX491ATA

33 1 Q28 MOSFET, N-CH, SUPER, SOT-6 FAIRCHILD, FDC2512-NL

34 1 Q29 MOSFET, P-CH, IRF6217, POWERPAK-SO-8 IR, IRF6217TRPBF

35 1 R1 RES., CHIP, 0.33, 1/4W, 5%, 2512 PANASONIC, ERJ-1TRQJR33U

36 1 R4 RES., CHIP, 8.2k, 1W, 5%, 2512 PANASONIC, ERJ-1TYJ822U

37 1 R18 RES., CHIP, 102k, 1/8W, 1%, 0805 VISHAY, CRCW0805102KFKEA

38 1 R22 RES., CHIP, 3.74k, 1/16W, 1%, 0603 VISHAY, CRCW06033K74FKEA

39 2 R23, R24 RES., CHIP, 8.2, 1/4W, 5%, 1206 VISHAY, CRCW12068R20JKEA

40 1 R29 RES., CHIP, 100k, 1/8W, 5%, 0805 VISHAY, CRCW0805100KJNEA

41 1 R41 RES., CHIP, 11.5k, 1/16W, 1%, 0603 VISHAY, CRCW060311K5FKEA

dc2199aafa

DEMO MANUAL DC2199A-A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

42 1 R42 RES., CHIP, 1k, 1/16W, 1%, 0603 VISHAY, CRCW06031K00FKEA

43 1 R46 RES., CHIP, 604, 1/16W, 1%, 0603 VISHAY, CRCW0603604RFKEA

44 2 R51, R52 RES., CHIP, 3.0, 1/4W, 5%, 1206 PANASONIC, ERJ-8GEYJ3R0V

45 1 R53 RES., CHIP, 6.8, 1/2W, 1%, 1206 PANASONIC, ERJ-8RQF6R8V

46 1 R68 RES., CHIP, 2.15k, 1/16W, 1%, 0603 VISHAY, CRCW06032K15FKEA

47 1 R69 RES., CHIP, 46.4k, 1/16W, 1%, 0603 VISHAY, CRCW060346K4FKEA

48 1 R75 RES., CHIP, 215, 1/8W, 1%, 0805 VISHAY, CRCW0805215RFKEA

49 1 R76 RES., CHIP, 4.22, 1/8W, 1%, 0805 VISHAY, CRCW08054R22FKEA

50 1 R84 RES., CHIP, 1.21k, 1/8W, 1%, 0805 VISHAY, CRCW08051K21FKEA

51 4 R101, R148, R149, R151 RES., CHIP, 100, 1/16W, 1%, 0603 VISHAY, CRCW0603100RFKEA

52 1 R109 RES., CHIP, 10k, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA

53 1 R110 RES., CHIP, 1.20, 1/2W, 1%, 1206 SUSUMU, RL1632S-1R20-F

54 1 R114 RES., CHIP, 28.7k, 1/16W, 1%, 0603 VISHAY, CRCW060328K7FKEA

55 1 R117 RES., CHIP, 12.7k, 1/16W, 1%, 0603 VISHAY, CRCW060312K7FKEA

56 1 R118 RES., CHIP, 681k, 1/16W, 1%, 0603 VISHAY, CRCW0603681KFKEA

57 1 R121 RES., CHIP, 133k, 1/16W, 1%, 0603 VISHAY, CRCW0603133KFKEA

58 1 R123 RES., CHIP, 118k, 1/16W, 1%, 0603 VISHAY, CRCW0603118KFKEA

59 1 R125 RES., CHIP, 17.4k, 1/16W, 1%, 0603 VISHAY, CRCW060317K4FKEA

60 1 R136 RES., CHIP, 0.005, 1W, 1%, 1225 SUSUMU, KRL6432D-M-R005-F-T5

61 1 R139 RES., CHIP, 26.7k, 1/16W, 1%, 0603 VISHAY, CRCW060326K7FKEA

62 1 R140 RES., CHIP, 274, 1/8W, 1%, 0805 PANASONIC, ERJ-6ENF2740V

63 1 R150 RES., CHIP, 14.3k, 1/16W, 1%, 0603 VISHAY, CRCW060314K3FKEA

64 1 T1 TRANSFORMER CHAMPS TECH., LT C -PQ26-0402

65 1 T2 TRANSFORMER, 1.25:1 Pulse, PA3493NL

66 1 T3 TRANSFORMER, 1:100, CT02-100 ICE COMPONENTS, CT02-100 = 1:100

67 1 U1 I.C. LTC3765EMSE, MSOP-16PIN LINEAR TECH., LTC3765EMSE#PBF

68 1 U2 I.C. LTC3766EGN, SSOP-GN28 LINEAR TECH., LTC3766EGN#PBF

Additional Demo Board Circuit Components

1 0 C12, C13, C14, C16, C20 CAP., OPT, 0603 OPT

2 0 C8, C9, C18, C19, C103, C111 CAP., OPT, 0603 OPT

3 0 C15, C21, C114 CAP., OPT, 0805 OPT

4 0 C17, C116 CAP., OPT, 1206 OPT

5 0 C23, C25, C26 CAP., OPT, CAP-SVPF-E12 OPT

6 2 C74, C105 CAP, 0Ω, JUMPER 0603 VISHAY, CRCW06030000Z0EA

7 0 D2 DIODE TBD SOD323 OPT

8 0 D4, D35 DIODE OPT, SOD323 OPT

9 0 D28, D37, D38 DIODE OPT, SOT23 OPT

10 0 L4 INDUCTOR, OPT, DO1606T OPT

11 0 Q1, Q2 MOSFET, OPT, SOT23-6 OPT

12 0 Q4 MOSFET, OPT, D-PAK OPT

13 0 Q11, Q23, Q24 MOSFET, OPT, POWERPAK-SO-8 OPT

14 0 R5 RES., OPT, 2512/2010 OPT

dc2199aafa

DEMO MANUAL DC2199A-A

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

15 13 R6, R7, R8, R9, R49, R103, R111, R112,

R113, R122, R124, R137, R146

RES., CHIP, 0Ω, 0603 VISHAY, CRCW06030000Z0EA

16 0 R10, R13, R14, R15 RES., OPT, 2512 OPT

17 0 R17, R108, R116, R127 RES., OPT, 1206 OPT

18 0 R25, R26, R27, R28, R30, R31, R32, R33,

R34, R35, R43, R106, R107, R119, R120,

R126, R138, R147

RES., OPT, 0603 OPT

19 1 R77 RES., CHIP, 0, 1/8W, 0805 VISHAY, CRCW08050000Z0EA

20 1 R102 RES., CHIP, 0Ω, 1225 TEPRO,RN5326

21 1 R115 RES., CHIP, 0, 1/4W, 1206 VISHAY, CRCW12060000Z0EA

22 0 R152 RES., OPT, 0805 OPT

23 0 U3 I.C. OPT, SO16 OPT

Hardware: For Demo Board Only

1 4 E1, E2, E3, E4 TESTPOINT, TURRET, .094" MILL-MAX, 2501-2-00-80-00-00-07-0

2 3 E5, E6, E7 TESTPOINT, TURRET, .061" MILL-MAX, 2308-2-00-80-00-00-07-0

3 0 J1 HEADER, OPT, 2×7PIN, 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 0 TP1-TP6 PAD-SMD PAD-SMD

9 4 (STAND-OFF) STAND-OFF, NYLON 0.25" KEYSTONE, 8831 (SNAP ON)

10 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 2199A

PARTS LIST

dc2199aafa

DEMO MANUAL DC2199A-A

Simplified Schematic (without Unneeded Components)

SCHEMATIC DIAGRAM

+VOUT

36V-60VIN

-VOUT

1210

1812

0805

1210

0805

1210

0805

12VOUT / 30A

COG

7343

1.25T 1T

1/4W = 1206, 1W = 2512.

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,

NOTE:

4.7uF 100V MURATA, GRM32ER72A475KE14 (X7R 1210)

4.7uF 25V AVX, 12063C475KAT2A (X7R 1206)

22uF 16V MURATA, GRM32ER71C226MEA8L (1210 X5R)

2.2nF 250V Murata GA343QR7GD222KW01L (X7R 1812)

150uF 16V PANASONIC, 16TQC150MYF

33uF 80V PANASONIC, EEHZA1K330P (10x12.5mm)

L2 Vishay IHLP4040DZER2R0M11

L3 Coilcraft SER2915L-332KL

0.005 ohm Susumu KRL6432D-M-R005-F-T5 (1225)

R110 SUSUMU, RL1632S-1R20-F (1206)

T1 Champs, LTC-PQ26-0402

T2 Pulse, PA3493NL

0805

1206

0805

1210

1/2W

VCP

+VOUT

VIN

IS+

-VIN

IS+

-VOUT

VIN

RS-

-VIN

-VOUT

+VOUT

PGNDP

SGNDP

SGND PGND

SGND

PGND

PSS

SGND

SGNDP

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Friday, October 31, 2014

ACTIVE CLAMP FORWARD CONVERTER

DAVID B.

N/A

LTC3765EMSE / LTC3766EGN28

DC2199A

WITH DIRECT FLUX LIMIT

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Friday, October 31, 2014

ACTIVE CLAMP FORWARD CONVERTER

DAVID B.

N/A

LTC3765EMSE / LTC3766EGN28

DC2199A

WITH DIRECT FLUX LIMIT

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Friday, October 31, 2014

ACTIVE CLAMP FORWARD CONVERTER

DAVID B.

N/A

LTC3765EMSE / LTC3766EGN28

DC2199A

WITH DIRECT FLUX LIMIT

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

DAVID B.PRODUCTION

2 8-18-14

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

DAVID B.PRODUCTION

2 8-18-14

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

DAVID B.PRODUCTION

2 8-18-14

Q15 BSC028N06NS3Q15 BSC028N06NS3

Q12 BSC028N06NS3Q12 BSC028N06NS3

R151

100

R151

100

FCX491A

Q27

FCX491A

Q27

3 2

C119

1nF

C119

1nF

C34

22uF

16V

C34

22uF

16V

C10

2.2nF

630V

1206

C10

2.2nF

630V

1206

Q24 OPTQ24 OPT

C102

0.1uF

C102

0.1uF

LTC3766EGN28

ITH

FG 2

SW 23

FB 6

GND

IS+ 18

IS- 17

SG 1

VCC 28

PT+

PT-

REGSD

FS/SYNC

MODE

PGND

VIN 22

NDRV 21

IPK

PHASE

VS+ 12

VS- 13

VSOUT

RUN

8FGD/SWB 20

VSEC 3

SGD

VAUX 24

TRANS-PA3493NL

1 6

R148

100

R148

100

R101

100

R101

100

R69

46.4K

R69

46.4K

Q14 BSC028N06NS3

Q11 OPTQ11 OPT

C73

1nF

C73

1nF

D34

ES1PD

D34

ES1PD

C69

1.5nF

630V

C69

1.5nF

630V

CT02-100

1 2

C72

0.1uF

C72

0.1uF

+VIN+VIN

R117

12.7K

R117

12.7K

C3,4,5,6

4x4.7uF

100V

C3,4,5,6

4x4.7uF

100V

D27

ZHCS506

D27

ZHCS506

R68

2.15K

R68

2.15K

C76

3.3nF

C76

3.3nF

Q29

IRF6217

Q29

IRF6217

-VIN-VIN

R139

26.7K

R139

26.7K

C1,22

2x33uF

80V

C1,22

2x33uF

80V

C55

1nF

C55

1nF

Q13 BSC028N06NS3

C66

47nF

200V

1206

C66

47nF

200V

1206

Q8 BSC190N15NS3Q8 BSC190N15NS3

C75

100pF

C75

100pF

LTCP26-0402

126

R42

Q23 OPTQ23 OPT

R114

28.7K

R114

28.7K

R29

100K

R29

100K

C80

1nF

C80

1nF

R149

100

R149

100

R23,24

2x8.2

1206

R23,24

2x8.2

1206

R18

102K

R18

102K

8.2K

2512

8.2K

2512

R41

11.5K

R41

11.5K

R121

133K

R121

133K

D30

ZHCS506

D30

ZHCS506

R123

118K

R123

118K

C71

1uF

16V

C71

1uF

16V

R84

1.21K

R84

1.21K

R51,52

2x3.0

1206

R51,52

2x3.0

1206

R118

681K

R118

681K

2.0uH

ES1PD

1 2

C11

15nF

C11

15nF

R46

604

R46

604

C30

2.2nF

250V

C30

2.2nF

250V

LTC3765EMSE

NDRV 14

VCC

PG 2

IN+ 15

IN- 16

RUN

AG 4

DELAY

IS- 7

GND

IS+ 8

FS/UV

SSFLT

PGND

GND2

RCORE

ISMAG

C101

220pF

C101

220pF

C77

4.7uF

C77

4.7uF

R76

4.22

R76

4.22

0.33

2512

0.33

2512

R110

1.20

1206

R110

1.20

1206

R125

17.4K

R125

17.4K C79

4.7nF

C79

4.7nF

Q28

FDC2512

Q28

FDC2512

C7,31,33,68

4x150uF

16V

C7,31,33,68

4x150uF

16V

C51

470pF

630V

1206

C51

470pF

630V

1206

C78

33nF

C78

33nF

C113

33nF

C113

33nF

C106

150pF

250V

C106

150pF

250V

1.0uH

R75

215

R75

215

R136

0.005

1225/2512

R136

0.005

1225/2512

C112

0.22uF

200V

C112

0.22uF

200V

C70

3.3nF

C70

3.3nF

D29

ZHCS506

D29

ZHCS506

R140

274

1/8W

R140

274

1/8W

C118

1.5nF

C118

1.5nF

R22

3.74K

R22

3.74K

3.3uH

R109

10K

R109

10K

R53

6.8

1206

R53

6.8

1206

Q9 BSC190N15NS3

C24

1uF

16V

C24

1uF

16V

4.7uF

100V

4.7uF

100V

R150

14.3K

R150

14.3K

dc2199aafa

DEMO MANUAL DC2199A-A

SCHEMATIC DIAGRAM

Full Schematic, Page 1

+VOUT

36V-60VIN

-SENSE

+SENSE

-VOUT

1210 1210 1210

1210

1812

7343

0805

1210

0805

1210

0805

12VOUT / 30A

COG

7343

1206

1.25T 1T

1/4W = 1206, 1W = 2512.

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,

NOTE:

4.7uF 100V MURATA, GRM32ER72A475KE14 (X7R 1210)

4.7uF 25V AVX, 12063C475KAT2A (X7R 1206)

22uF 16V MURATA, GRM32ER71C226MEA8L (1210 X5R)

2.2nF 250V Murata GA343QR7GD222KW01L (X7R 1812)

150uF 16V PANASONIC, 16TQC150MYF

33uF 80V PANASONIC, EEHZA1K330P (10x12.5mm)

L2 Vishay IHLP4040DZER2R0M11

L3 Coilcraft SER2915L-332KL

0.005 ohm Susumu KRL6432D-M-R005-F-T5 (1225)

R110 SUSUMU, RL1632S-1R20-F (1206)

T1 Champs, LTC-PQ26-0402

T2 Pulse, PA3493NL

1206

0805

1206

1206 7343

0805

ITH-

1210

RUN

1/2W

AG1

VS+

VS-

VCP

VCC

+VOUT

VIN

RUN

IS+

-VIN

IS+

-VOUT

VPK

VIN

RS-

-VIN

RUN

RS+RS-

VAUX

RS+RS-

SWB

VCC

-VOUT

+VOUT

VCC

PGND

PGNDP

SGNDP

SGND PGND

SGND

PGND

SGND

PGND

PT-

PSS

SSS SYNC ITH

SGND

SGNDP

VCC

CLAMP

AG1

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Wednesday, October 29, 2014

ACTIVE CLAMP FORWARD CONVERTER

DAVID B.

N/A

LTC3765EMSE / LTC3766EGN

DC2199A

WITH DIRECT FLUX LIMIT

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Wednesday, October 29, 2014

ACTIVE CLAMP FORWARD CONVERTER

DAVID B.

N/A

LTC3765EMSE / LTC3766EGN

DC2199A

WITH DIRECT FLUX LIMIT

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Wednesday, October 29, 2014

ACTIVE CLAMP FORWARD CONVERTER

DAVID B.

N/A

LTC3765EMSE / LTC3766EGN

DC2199A

WITH DIRECT FLUX LIMIT

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

DAVID B.PRODUCTION

2 10-29-14

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

DAVID B.PRODUCTION

2 10-29-14

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

DAVID B.PRODUCTION

2 10-29-14

R137

Q12 BSC028N06NS3Q12 BSC028N06NS3

678

R52

3.0

1206

R52

3.0

1206

100V

4.7uF

100V

4.7uF

R122

R111

C10

2.2nF

630V

1206

C10

2.2nF

630V

1206

R146

C34

22uF

16V

C34

22uF

16V

R106

OPT

R106

OPT

C119

1nF

C119

1nF

FCX491A

Q27

FCX491A

Q27

3 2

R151

100

R151

100

C31

150uF

16V

C31

150uF

16V

Q15 BSC028N06NS3Q15 BSC028N06NS3

678

R138

OPT

R138

OPT

R147

OPT

R147

OPT

R69

46.4K

R69

46.4K

R101

100

R101

100

R148

100

R148

100

TRANS-PA3493NL

1 6

LTC3766EGN

ITH

FG 2

SW 23

FB 6

GND

IS+ 18

IS- 17

SG 1

VCC 28

PT+

PT-

REGSD

FS/SYNC

MODE

PGND

VIN 22

NDRV 21

IPK

PHASE

VS+ 12

VS- 13

VSOUT

RUN

8FGD/SWB 20

VSEC 3

SGD

VAUX 24

C23

OPT

C23

OPT

C102

0.1uF

C102

0.1uF

Q24 OPT

678

C105

CT02-100

1 2

C69

1.5nF

630V

C69

1.5nF

630V

Q11 OPTQ11 OPT

2 3

678

Q14 BSC028N06NS3

678

D34

ES1PD

D34

ES1PD

J3J3

C73

1nF

C73

1nF

C76

3.3nF

C76

3.3nF

R107

OPT

R107

OPT

Q31

OPT

Q31

OPT

R68

2.15K

R68

2.15K

D27

ZHCS506

D27

ZHCS506

E6E6

R115

1/4W

R115

1/4W

R127

OPT

1/4W

R127

OPT

1/4W

R124

4.7uF

100V

4.7uF

100V

C74

R117

12.7K

R117

12.7K

D40

1N4148WS

D40

1N4148WS

1 2

+VIN

C72

0.1uF

C72

0.1uF

C55

1nF

C55

1nF

33uF

80V

33uF

80V

Q29

IRF6217

Q29

IRF6217

R139

26.7K

R139

26.7K

4.7uF

100V

4.7uF

100V

-VIN

J4J4

R77

R103

Q13 BSC028N06NS3

678

C22

33uF

80V

C22

33uF

80V

C26

OPT

R49

C66

47nF

200V

1206

C66

47nF

200V

1206

R42

0603

Q8 BSC190N15NS3Q8 BSC190N15NS3

2 3

678

LTCP26-0402

126

C75

100pF

C75

100pF

0603

Q23 OPT

678

R119

OPT

R119

OPT

R41

11.5K

R41

11.5K

C111

OPT

C111

OPT

8.2K

2512

8.2K

2512

R18

102K

R18

102K

R24

8.2 1206

R24

8.2 1206

R149

100

R149

100

C80

1nF

C80

1nF

R29

100K

R29

100K

R108

OPT

R108

OPT

R114

28.7K

R114

28.7K

OPT

R113

C103

OPT

C103

OPT

R23

8.2 1206

R23

8.2 1206

R118

681K

R118

681K

R51

3.0

1206

R51

3.0

1206

R84

1.21K

R84

1.21K

C71

1uF

16V

C71

1uF

16V

R123

118K

R123

118K

C68

150uF

16V

C68

150uF

16V

D30

ZHCS506

D30

ZHCS506

R121

133K

R121

133K

C30

2.2nF

250V

C30

2.2nF

250V

R126

OPT

R126

OPT

R46

604

R46

604

C11

15nF

C11

15nF

ES1PD

1 2

2.0uH

R109

10K

R109

10K

OPT

C77

4.7uF

C77

4.7uF

R116

OPT

1206

R116

OPT

1206

D28

OPT

D28

OPT

C101

220pF

C101

220pF

LTC3765EMSE

NDRV 14

VCC

PG 2

IN+ 15

IN- 16

RUN

AG 4

DELAY

IS- 7

GND

IS+ 8

FS/UV

SSFLT

PGND

GND2

RCORE

ISMAG

R112

C79

4.7nF

C79

4.7nF

R125

17.4K

R125

17.4K

R110

1.20

1206

R110

1.20

1206

0.33

2512

0.33

2512

R76

4.22

R76

4.22

R75

215

R75

215

C25

1.0uH

R43

OPT

R43

OPT

C106

150pF

200V

C106

150pF

200V

C113

33nF

C113

33nF

Q28

FDC2512

Q28

FDC2512

4 1

C78

33nF

C78

33nF

C51

470pF

630V

1206

C51

470pF

630V

1206

150uF

16V

150uF

16V

OPT

2512

OPT

2512

R102

1225

R102

1225

R140

274

1/8W

R140

274

1/8W

D29

ZHCS506

D29

ZHCS506

C70

3.3nF

C70

3.3nF

C112

0.22uF

200V

C112

0.22uF

200V

100V

4.7uF

100V

4.7uF

R136

0.005

1225/2512

R136

0.005

1225/2512

R10

OPT

2512

R10

OPT

2512

OPT

R53

6.8

1206

R53

6.8

1206

E5E5

3.3uH

R22

3.74K

R22

3.74K

R120

OPT

R120

OPT

C118

1.5nF

C118

1.5nF

R150

14.3K

R150

14.3K

Q9 BSC190N15NS3

2 3

678

E7E7

4.7uF

100V

4.7uF

100V

C33

150uF

16V

C33

150uF

16V

C24

1uF

16V

C24

1uF

16V

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