Linear Technology DC1929A Quick setup guide

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DC1929A
ANALOG DEVICES
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1
dc1929afa
DEMO MANUAL DC1929A
Description
LT3752-1/LT8311
200W Active Clamp Forward
Converter with Input Voltage 150V to 400V
Demonstration circuit 1929A is a 200W active clamp for-
ward converter featuring the LT
®
3752-1/LT8311 chipset.
It operates at about 100kHz and produces a regulated 12V
output from an input voltage ranging from 150V to 400V,
making it well suited for automotive, industrial, and other
applications. Table 1 summarizes the performance of the
demo board.
The LT3752-1 is a current mode PWM controller opti-
mized for a forward converter with high-side active clamp
transformerreset.Anaccurate,programmablevolt-second
clamp allows primary switch duty cycles above 50% for
better utilization of switch, transformer and rectifier. The
AOUT control signal can be used to power a gate drive
transformer, level-shift driver, or opto-coupler driver
for the high-side N-channel FET. The SOUT controls the
secondary side synchronous rectification. The integrated
housekeeping flyback controller brings great convenience
for both primary and secondary bias circuits. During its
soft-start and soft-stop, LT3752-1 folds back switching
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
frequency and duty-ratio clamp, thus reduces the electri-
cal stresses over the output inductor, and transformer.
TheLT3752-1featuresasetofsafetyprotectionsincluding
undervoltage,overvoltageandovercurrentprotections.Its
precise overcurrent protection allows for continuous reli-
able operation under short-circuit conditions. The LT8311
controlsthesecondarysidesynchronousrectification,with
enhanced regulation of the output voltage during startup,
shutdown or recovery from a fault.
The LT3752-1 and LT8311 data sheets give complete
descriptions of the parts, operation and application infor-
mation. The data sheet must be read in conjunction with
this quick start guide for Demo Circuit 1929A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1929A
Specifications are at TA= 25°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range (VIN) 150 250 400 V
Startup Voltage 150 V
UVLO Shutdown Voltage 147 V
OVLO Shutdown Voltage 416 V
Output Voltage (VOUT) VIN = 150V to 400V 11.76 12 12.24 V
Rated Output Current Continuous (IOUT) 300LFM 16.7 A
Short-term Output Current (IMAX) 300LFM, 1 Minute 20 A
Switching Frequency (fSW) 100 kHz
Output Voltage Ripple (Peak_to_Peak) 120 mVP-P
No Load Current IOUT = 0A, VIN = 400V 18 mA
Efficiency VIN = 250V, IOUT = 16.7A, 300LFM 93.9 %
Isolation (Primary and Secondary) 1500 V

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dc1929afa
DEMO MANUAL DC1929A
Quick start proceDure
IMPORTANT NOTE TO CUSTOMERS:
HAZARDOUS HIGH VOLTAGES ARE PRESENTED ON
THE DEMO CIRCUIT. IMPROPER OR UNSAFE HAN-
DLING OF THIS DEMO BOARD CAN LEAD TO LETHAL
INJURIES TO HUMAN BODY. ONLY QUALIFIED PER-
SONEL SHOULD OPERATE IT. YOU ARE STRONGLY
RECOMMENDED TO USE SAFETY GLASSES AND
AN ISOLATION TRANSFORMER. IMPROPER COM-
PONENTS REPLACEMENT ON THE DEMO CIRCUIT
CAN CAUSE PERFORMANCE DETERIORATIONS,
CIRCUITMALFUNCTION,PROPERTY DAMAGE,AND
EVEN LIFE-THREATHENING INJURIES. CONTACT
LINEAR TECHNOLOGY APPLICATIONS ENGINEERS
FOR PROPER COMPONENT REPLACEMENT AND
CIRCUIT MODIFICATION.
Demonstration circuit 1929A must be set up as follows
to evaluate the performance of the LT3752-1/LT8311.
Refer to Figure 1 for proper equipment setup and follow
the procedure below.
NOTE. Do not operate DC1929A unless you have the ap-
propriate safety precautions in place on your bench to
guarantee safety. Always remove power before touching,
servicing, or attaching probes to the demo board. Never
leave the DC1929A unattended when under power.
1. With power off, connect the input power supply to the
board. The power supply should be adjustable over
100V ~ 450V range, and at least 3A current capability.
An ammeter capable of measuring 3ADC can be put in
series with the input supply to measure the input cur-
rent. Connect the load to the terminals VOUT+(J1) and
VOUT–(J2) on the board. The load should be adjustable
up to 20A. If efficiency measurements are desired, an
ammeter capable of measuring 20ADC or a resistor
shunt can be put in series with the load to measure the
output current. A voltmeter can be placed across the
output terminals (E4, E5) in order to get an accurate
output voltage measurement.
2. Direct airflow of 300LFM across the demo circuit for
sustained operation at full load. Refer to Figure 1 for
proper airflow direction.
3. Turn on the power at the input. Increase VIN slowly to
150V.
NOTE. Make sure that the input voltage does not exceed
400V. Make sure the load current does not exceed the
specifications.
NOTE. Check the standby current without any load applied
and it should be less or around 25mA at 150V input, or
20mAat400Vinput.Anycross-conductionoftheprimary-
secondary switches will significantly increase the standby
current.
4. Checkfortheproperoutputvoltages.Theoutputshould
be regulated at 12.0V (±2%).
NOTE. If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
NOTE. By removing the resistor R2, and applying the VIN
between VBand –VIN, the main power circuit is discon-
nected from the control/bias circuits, and the control/bias
circuit can be debugged separately. The standby current
of the control/bias circuit should be less than 2mA.
NOTE. By removing R37 and R40, and adjusting R25 to
107k, the feedback loop is disabled, and the circuit runs
in no-opto bus converter mode.
5. Once the proper output voltage is established, adjust
the input voltage and load current within the operating
range and observe the output voltage regulation, ripple
voltage, efficiency and other parameters.
NOTE. When measuring the output voltage ripples, care
must be taken to avoid a long ground lead on the oscillo-
scopeprobe.SeeFigure2forproperscopeprobetechnique.
NOTE. Airflow should be directed to the demo circuit ac-
cording to the direction shown in Figure 1. Running the
circuitatfullload without airflowcouldoverheatthepower
components, and lead to damage of the board. Overload
operationofthedemocircuitisfeasibleforshort-termonly.
Long term overcurrent operation is not recommended,
unless enhanced cooling methods are used.
6. Turn off the load at the output, the power at the input,
and then turn off the airflow.

3
dc1929afa
DEMO MANUAL DC1929A
Quick start proceDure
+ –
VOUT GND
COUT
+
–
+
–
+
–
+
–
+
–LOAD
IOUT
VOUT
VIN
IIN
+
–
POWER
SUPPLY
Figure 1. Proper Measurement Equipment Setup
Figure 2. Proper Scope Probe Placement for Measuring Output Ripple

4
dc1929afa
DEMO MANUAL DC1929A
Quick start proceDure
80.00
82.00
84.00
86.00
88.00
90.00
92.00
94.00
96.00
0.0 2.0 4.0 6.0 8.0 10.0
LOAD CURRENT (A)
EFFICIENCY (%)
12.0 14.0 16.0 18.0
VIN = 150V
VIN = 250V
VIN = 400V
Figure 3. Typical Efficiency Curve, (300LFM, TA= 25°C)
Figure 4. Output Ripple at 250VIN at 16.7AOUT
VOUT
50mV/DIV

5
dc1929afa
DEMO MANUAL DC1929A
Quick start proceDure
Figure 5. Short-Circuit at Output at VIN = 400V
SW1
50V/DIV
20V/DIV
Q7
DRAIN
200V/DIV
SW2

6
dc1929afa
DEMO MANUAL DC1929A
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 9 CIN1-CIN9 CAP., X7T, 0.22µF, 630V, 10% 1812 TDK, C4532X7T2J224K
2 4 CO1, CO2, CO3, CO4 CAP., X7R, 33µF, 16V, 20%, 1812 TDK, C4532X7R1C336M
3 1 CSYS1 CAP., ALUM, 1000µF, 16V, SEPF SERIES PANASONIC, 16SEPF1000M
4 1 CY1 CAP., CER, 2200pF, 500VAC, 20% RADIAL VISHAY, VY1222M47Y5UG63V0
5 1 C1 CAP., X7R, 10nF, 250V, 10% 1210 AVX, 1210PC103KAT1A
6 1 C4 CAP., X7R, 4.7µF, 25V, 10%, 1206 TDK, C3216X7R1E475K
7 2 C5, C8 CAP., X7R, 47nF, 630V, 10%, 1812 AVX, 1812CC473KAT1A
8 1 C6 CAP., X7R, 22µF, 25V, 10%, 1210 MÜRATA, GRM32ER71E226K
9 1 C7 CAP., CH, 10nF, 630V, 10%, 1210 TDK, C3225CH2J103J125AA
10 1 C10 CAP., X7R, 10µF, 25V, 10%, 1210 AVX, 12103C106KAT2A
11 2 C11, C27 CAP., X7R, 22nF, 50V, 10%, 0603 AVX, 06035C223KAT2A
12 1 C12 CAP., C0G, 220pF, 25V, 5%, 0603 AVX, 06033A221JAT2A
13 2 C13, C21 CAP., C0G, 470pF, 25V, 5%, 0603 AVX, 06033A471JAT2A
14 1 C14 CAP., X7R, 1nF, 25V, 10%, 0603 AVX, 06033C102KAT2A
15 2 C22, C26 CAP., X5R, 4.7µF, 25V, 10%, 0805 AVX, 08053D475KAT2A
16 1 C23 CAP., X7R, 0.47µF, 16V, 10%, 0603 TDK, C1608X7R1C474K
17 1 C24 CAP., X7R, 0.22µF, 25V, 10%, 0603 AVX, 06033C224KAT2A
18 2 C25, C31 CAP., X5R, 2.2µF, 16V, 10%, 0603 AVX, 0603YD225KAT2A
19 1 C28 CAP., C0G, 68pF, 50V, 5%, 0603 AVX, 06035A680JAT2A
20 1 C29 CAP., X7R, 1µF, 25V, 10%, 0603 AVX, 06033C105KAT2A
21 1 C30 CAP., X7R, 0.22µF, 50V, 10%, 0805 AVX, 08055C224KAT2A
22 1 C32 CAP., C0G, 10pF, 50V, 5%, 0603 AVX, 06035A100JAT2A
23 1 C33 CAP., Alum. Electro. 2.2µF, 450V, G13 size Panasonic, EEVEB2W2R2Q
24 2 D1, D2 Schottky Barrier Rec., POWER-DI-123 DIODE INC., DFLS1200-7
25 4 D4, D5 Diode, High-Speed Diode, SOD-523 NXP/Phillips Semi. BAS516
26 1 D10 Schottky Barrier Rec., SOD-123 CENTRAL SEMI., CMMR1U-02
27 1 D12 Rectifier, 1000V, 1A, SMB CENTRAL SEMI., CMR1U-10
28 1 F1 FUSE, 600V, 2.5A, 485 SERIES Littelfuse, 048502.5DR
29 1 L1 IND., 15µH Coilcraft, AGP2923-153KL
30 1 L2 IND., 4.7µH, XAL40xx SERIES Coilcraft, XAL4030-472ME
31 1 Q1 N-Chan. BSP300, SOT-223 infineon, BSP300
32 3 Q2, Q3, Q8 FET, N-CH, POWER 56 Fairchild, FDMS86200
33 2 Q4, Q5 FET, N-CH, LFPAK RENESAS, RJK0653DPB-00#J5
34 1 Q6 Power Transistor, 600V, DPAK Infineon, IPD60R1K4C6
35 1 Q7 Power Transistor, 650V, DPAK Infineon, IPD65R250C6
36 1 Q9 NPN/PNP Transistor, SC-74 NXP SEMI., PBSS4140DPN
37 1 RCS1 RES., CHIP., 0.2, 1/8W, 1% 0805 VISHAY, WSL0805R200FEA
38 1 RCS2 RES., CHIP., 0.039, 1W, 1%, PRL1632 SUSUMU, PRL1632-R039-F-T1
39 1 RCS3 RES., CHIP., 0.002, 1W, 2%, PML18 ROHM, PML18EZPGV2L00
40 2 R1,R6 RES., CHIP., 20k, 1/4W, 1%, 1206 VISHAY, CRCW120620K0FKEA
41 1 R2 RES., CHIP., 2, 1/4W, 1%, 1206 VISHAY, CRCW12062R00FKEA

7
dc1929afa
DEMO MANUAL DC1929A
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
42 1 R5 RES., CHIP., 3.3, 1/10W,1%, 0603 VISHAY, CRCW06033R30FKEA
43 2 R7, R14 RES., CHIP., 374k, 1/4W, 1%, 1206 VISHAY, CRCW1206374KFKEA
44 1 R8 RES., CHIP., 402, 1/4W, 1%, 1210 VISHAY, CRCW1210402RFKEA
45 2 R9, R17 RES., CHIP., 499k, 1/4W, 1%, 1206 VISHAY, CRCW1206499KFKEA
46 1 R10 RES., CHIP., 232, 1/10W,1%, 0603 VISHAY, CRCW0603232RFKEA
47 1 R11 RES., CHIP., 499, 1/10W,1%, 0603 VISHAY, CRCW0603499RFKEA
48 1 R15 RES., CHIP., 806, 1/10W,1%, 0603 VISHAY, CRCW0603806RFKEA
49 1 R16 RES., CHIP., 2.80k, 1/10W, 1%, 0603 VISHAY, CRCW06032K80FKEA
50 1 R18 RES., CHIP., 5.76k, 1/10W, 1%, 0603 VISHAY, CRCW06035K76FKEA
51 1 R19 RES., CHIP., 200, 1/10W, 5%, 0603 VISHAY, CRCW0603200RJKEA
52 1 R22 RES., CHIP., 2.94k, 1/10W,1%, 0603 VISHAY, CRCW06032K94FKEA
53 1 R23 RES., CHIP., 1.5k, 1/10W, 1%, 0603 VISHAY, CRCW06031K50FKEA
54 3 R3, R24, R31 RES., CHIP., 10, 1/10W, 5%, 0603 VISHAY, CRCW060310R0JKEA
55 1 R25 RES., CHIP., 124k, 1/10W, 1% 0603 VISHAY, CRCW0603124KFKEA
56 1 R28 RES., CHIP., 124k, 1/10W, 1%, 0603 VISHAY, CRCW0603124KFKEA
57 1 R29 RES., CHIP., 20k, 1/10W, 1%, 0603 VISHAY, CRCW060320K0FKEA
58 1 R30 RES., CHIP., 40.2k, 1/10W, 1%, 0603 VISHAY, CRCW060340K2FKEA
59 3 R12, R32, R46 RES., CHIP., 10k, 1/10W, 5%, 0603 VISHAY, CRCW060310K0JNEA
60 1 R33 RES., CHIP., 75k, 1/10W, 1%, 0603 VISHAY, CRCW060375K0FKEA
61 1 R34 RES., CHIP., 154, 1/10W, 1%, 0603 VISHAY, CRCW0603154RFKEA
62 4 R35, R36, R41, R63 RES., CHIP., 100k, 1/10W, 1%, 0603 VISHAY, CRCW0603100KFKEA
63 1 R37 RES., CHIP., 100, 1/10W, 5%, 0603 VISHAY, CRCW0603100RJNEA
64 1 R38 RES., CHIP., 5.62k, 1/10W, 1%, 0603 VISHAY, CRCW06035K62FKEA
65 1 R39 RES., CHIP., 78.7k, 1/10W, 1%, 0603 VISHAY, CRCW060378K7FKEA
66 1 R40 RES., CHIP., 3.16k, 1/10W, 1%, 0603 VISHAY, CRCW06033K16FKEA
67 3 R42, R55, R62 RES., CHIP., 1k, 1/10W, 1%, 0603 VISHAY, CRCW06031K00FKEA
68 1 R43 RES., CHIP., 12.7k, 1/10W, 1%, 0603 VISHAY, CRCW060312K7FKEA
69 1 R49 RES., CHIP., 1.13k, 1/10W, 1%, 0603 VISHAY, CRCW06031K13FKEA
70 5 R50, R56, R59-R61 RES., CHIP., 0, 1%, 0603 VISHAY, CRCW06030000Z0EA
71 1 R51 RES., CHIP., 309, 1/10W, 1%, 0603 VISHAY, CRCW0603309RFKEA
72 1 R53 RES., CHIP., 4.42, 1/4W, 1%, 1206 VISHAY, CRCW12064R42FKEA
73 1 R54 RES., CHIP., 523k, 1/10W, 1%, 0603 VISHAY, CRCW0603523KFKEA
74 1 R65 RES., CHIP., 10, 1/8W, 5%, 0805 VISHAY, CRCW080510R0JNEA
75 1 T1 Transformer, LT80R2-12AC-3124005 REV 01 CHAMPS, LT80R2-12AC-3124005 REV 01
76 1 T2 Transformer, WE750817020 REV 1 WE., 750817020 REV 1
77 1 T3 Transformer,PE-68386NL PULSE ENG., PE-68386NL
78 1 U1 I.C., Synch. Reg. TSSOP-38(331) Linear Tech., LT3752EFE-1#PBF
79 1 U2 I.C., LT8311EFE TSSOP-20(16) Linear Tech., LT8311EFE#PBF
80 1 U3 I.C., PS2801C-1 NEC, PS2801C-1
81 1 U4 I.C., ACPL-W346 AVAGO, ACPL-W346

8
dc1929afa
DEMO MANUAL DC1929A
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Additional Demo Board Circuit Components
1 0 CO5, CO6 (OPT) CAP., X7R, 1812
2 0 C2 (OPT) CAP., 1210
3 0 C3 (OPT) CAP., 1206
4 0 C15, C34-C36 (OPT) CAP., 0603
5 0 D6 (OPT) Diode, SOD-523
6 0 D8, D9 (OPT) Diode, SOD323
7 0 D11 (OPT) Rectifier, SMA
8 0 R4, R26, R27 (OPT) RES., CHIP., 1206
9 0 R44, R52, R57, R64, R66 (OPT) RES., 0603
10 0 R45 (OPT) RES., 1210
11 0 R47, R48, R58 (OPT) RES., 0805
12 0 T4 (OPT) Transformer., GT05-111-100 ICE, GT05-111-100
Hardware: For Demo Board Only
1 1 E1 TESTPOINT, TURRET, .061" pbf MILL-MAX, 2308-2-00-80-00-00-07-0
2 4 E2-E5 TESTPOINT, TURRET, .094" pbf MILL-MAX, 2501-2-00-80-00-00-07-0
3 2 J1, J2 JACK BANANA KEYSTONE, 575-4
parts List

9
dc1929afa
DEMO MANUAL DC1929A
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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
+VOUT
+12V / 16.7A
16SEPF1000M
-VOUT
VB
SYNC VBGND
103KHz
150V - 400V
+VIN
-VIN
C3: CGA54X7R2J153K
C5, C7: CGA6M4X7R2J473K
C8: CGA8N4X7R2J104K
QSG
*
1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603. NOTE: UNLESS OTHERWISE SPECIFIED
SOUT
AOUT
SOUT
AOUT
SW1 +VO1
CG
+VT
FG
INTVCC
INTVCC
VAUX
VFB
INTVCC
A
A
A
VHK
+VT
SW1
FG
SW1
SW2
+VO1 VAUX
CG
A B
A B
C
COM
CG
VAUX
SW2
A
INTVCC
VAUX
+VO1
COM
COM
C
CS+
CS-
CS+ CS-
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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.
www.linear.com
5
DEMO CIRCUIT 1929A
Tuesday, February 25, 2014 11 HIGH VIN TO 12V, 16.7A ISOLATED DC/DC CONVERTER
N/A
LT3752EFE-1
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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.
www.linear.com
5
DEMO CIRCUIT 1929A
Tuesday, February 25, 2014 11 HIGH VIN TO 12V, 16.7A ISOLATED DC/DC CONVERTER
N/A
LT3752EFE-1
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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.
www.linear.com
5
DEMO CIRCUIT 1929A
Tuesday, February 25, 2014 11 HIGH VIN TO 12V, 16.7A ISOLATED DC/DC CONVERTER
N/A
LT3752EFE-1
T2
WE 750817020
1
7 5
3
4 8
R41
100K
R28 124k
CIN4
R62 1K
R44
0(OPT)
C11 22nF
R19 200
CO5
R57
OPT
T1
LT80R2-12AC-3124005
6 2
13 8
R59
0
C21
470pF
CO6 1812
OPT
C15 OPT
E2 CIN1
C28 68pF
RCS3
0.002
PRL1632
D9 OPT
R61
0
C12
220pF
C23
0.47uF
R63
100K
C10 10uF 25V 1210
R12 10k
R24
10
C34 OPT
CY1
2.2nF 400V
440LD22-R
CO1
CIN7
C24
0.22uF
R4 OPT
1206
D12
CMR1U-10
SMB
R6 20k
1206
CIN2
0.22uF
630V
1812
Q4
R50 0
R39
78.7k
R54
523K
33uF
TDK
16V CO4
1812
C35 OPT
R55 1K
C14
1nF
R22 2.94k
Q2
C31
2.2uF
T3
PE-68386NL
1 2 3 4
6 5
R31 10
R9 499k 1206
R25 124k
R11 499
Q1 BSP300 SOT-223
1
34 2
CO7
R14 374K 1206
C6
22uF 1210
C4
4.7uF
1206
E3
R35 100k
Q5 RJK0653DPB
T4
OPT
GT05-111-100
4 1
6 5
CIN5
C5
47nF
630V
1812
R17 499k
1206
C8
47nF
630V 1812
C27
22nF
R56
0
R27 OPT
1206
RCS2 0.039
PRL1632
C1 10nF
1210
250V
L2
4.7uH
XFL4030-472ME
CIN8
F1
2.5Amp
R53 4.42
1206
+
CSYS1
1000uF
16V
C13 470pF
D6 OPT
R23
1.5K
C30
0.22uF 50V
0805
D2
DFLS1200-7
Q9A
PBSS4140DPN
1
2
6
R16
2.8K
R33 75k
R47 OPT
0805
L1
15uH
AGP2923-153
<5th Part Field>
C26
4.7uF 0805
R26 OPT
1206
J2
C25
2.2uF
16V
CO2
D8
OPT
R42
1K
R3
10
Q9B
PBSS4140DPN
4
5
3
D11 OPT
SMA
R34 154
U1
LT3752-EFE-1
COMP
5
FB
4
RT
3
SYNC
6
TBLNK
14
SS1
7
TOS
13
GND
18
HCOMP
2
SS2
17
OUT
24
AOUT
32
OC
22
ISENSEN
20
ISENSEP
21
VIN
28
HOUT
34
HISENSE
36
HFB
1
TAS
12
TAO
11
IVSEC
8
UVLO_VSEC
9
OVLO
10
INTVCC
26
SOUT
30
PGND
19
PGND
38
PGND
39
NC
15
NC
16
NC
37
R5
3.3
R2 2 1206
Q7
IPD65R250C6
DPAK 650V
1
4 3
J1
U4
ACPL-W346
A
1
NC
2
C
3
VEE
4
VOUT
5
VCC
6
R60 0
Q8
C7
10nF
630V
1210
TP2
R46
10K
R49
1.13K
R40 3.16K
RCS1
0.2
0805
TP1
R45
OPT 1210
R15 806
CIN9
R51 309
R8 402 1210
D1
DFLS1200-7 D10
CMMR1U-02
+
C33
2.2uF
450V
Q6
IPD60R1K4C6
DPAK 600V
1
4 3
R58 OPT
0805
R43 12.7K
CO3
E5
LT8311EFE
U2
CSW
1
FSW
3
FG
5
INTVCC
6
VIN
7
PMODE
8
OPTO
9
COMP
10
FB
11
TIMER
12
PGOOD
13
SS
14
SYNC
15
CG
16
CSN
18
CSP
20
GND
21
R48 OPT
0805
TP3
PGOOD
C22
4.7uF
25V
0805
R37 100
R65 10 0805
R38
5.62K
R36
100K
R30 40.2k
E4
C32
10pF
C3
OPT 1206
630V
D5 BAS516
R1
20k
1206
D4 BAS516
R29 20K
C29
1uF
E1
CIN3
R32
10K
R52 OPT
Q3
FDMS86200
R7 374K 1206
R66 OPT
U3
PS2801-1
1
3 4
2
C2
OPT
1210
C36 OPT
CIN6
R64 OPT
R18 5.76k
R10
232

10
dc1929afa
DEMO MANUAL DC1929A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2014
LT 1115 REV A • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
Thisdemonstrationboard(DEMOBOARD)kit being sold or provided by Linear Technologyisintendedforuse 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. LT C 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 applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation