QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
1
LTC3725 / LTC3726
DESCRIPTION
Demonstration circuit 1031A-A is a 36V-72Vin, syn-
chronous forward converter featuring the
LTC3725/LTC3726. This circuit was designed spe-
cifically to attain a high current, low ripple, synchro-
nously rectified forward converter to efficiently
power 2.5V loads at up to 20A from a typical telecom
input voltage range. This circuit features secondary-
side control of the supply eliminating the need for an
optocoupler, self-starting architecture, input under-
voltage lockout, and output overvoltage protection.
Design files for this circuit board are available.
Call the LTC factory.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Table 1.
Performance Summary (TA = 25°C)
PARAMETER CONDITION VALUE
Minimum Input Voltage 36V
Maximum Input Voltage 72V
Output Voltage V
OUT
V
IN
= 36V to 72V, I
OUT
= 0A to 20A 2.5V
Maximum Output Current 200LFM Airflow 20A
Typical Output Ripple V
OUT
V
IN
= 72V, I
OUT
= 20A 100mV
P–P
Size Component Area x Top Component Height 2.3” x 0.9” x 0.394”
Peak Deviation with Load Step of 10A to 20A (10A/us) ±150mV
Load Transient Response
Settling Time 40us
Nominal Switching Frequency 200kHz
Efficiency V
IN
= 48V, I
OUT
= 20A 90% Typical
OPERATING PRINCIPLES
The LTC3726 controller is used on the secondary and
the LTC3725 driver with self-starting capability is
used on the primary. When an input voltage is ap-
plied, the LTC3725 begins a controlled soft-start of
the output voltage. As this voltage begins to rise, the
LTC3726 secondary controller is quickly powered up
via T1, D25, and Q27. The LTC3726 then assumes
control of the output voltage by sending encoded
PWM gate pulses to the LTC3725 primary driver via
the small signal transformer, T2. The LTC3725 then
operates as a simple driver receiving both input sig-
nals and bias power through T2.
The transition from primary to secondary control oc-
curs seamlessly at a fraction of the output voltage.
From that point on, operation and design simplifies to
that of a simple buck converter. Secondary sensing
eliminates delays, tames large-signal overshoot and
reduces output capacitance while utilizing off-the-
shelf magnetics and attaining high efficiency.
For large values of input inductance, a 100V, 47uF elec-
trolytic capacitor can be added across the input termi-
nals to damp the input filter and provide adequate stabil-
ity. See Linear Technology Application Note AN19 for a
discussion on input filter stability analysis. A recom-
mended part is the Sanyo 100MV39AX.
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
2
QUICK START PROCEDURE
Demonstration circuit 1031A-A is easy to set up to
evaluate the performance of the LTC3725/LTC3726.
Refer to Figure 1 for proper measurement equipment
setup and follow the procedure below:
NOTE:
When measuring the input or output voltage
ripple, care must be taken to avoid a long ground lead
on the oscilloscope probe. Measure the output (or
input) voltage ripple by touching the probe tip and
probe ground directly across the input or output ca-
pacitor. See Figure 2 for proper scope probe tech-
nique.
1.
Set an input power supply that is capable of 36V to
72V at a current of at least 2A to a voltage of 36V.
Then, turn off the supply.
2.
With power off, connect the supply to the input
terminals +Vin and –Vin.
a.
Input voltages lower than 36V can keep the con-
verter from turning on due to the undervoltage
lockout feature of the LTC3725/LTC3726.
b.
If efficiency measurements are desired, an am-
meter capable of measuring 2Adc can be put in
series with the input supply in order to measure
the DC1031A-A’s input current.
c.
A voltmeter with a capability of measuring at
least 72V can be placed across the input termi-
nals in order to get an accurate input voltage
measurement.
3.
Turn on the power at the input.
NOTE:
Make sure that the input voltage never ex-
ceeds 72V.
4.
Check for the proper output voltage of 2.5V
5.
Turn off the power at the input.
6.
Once the proper output voltages are established,
connect a variable load capable of sinking 20A at
2.5V to the output terminals +Vout and –Vout. Set
the current for 0A.
a.
If efficiency measurements are desired, an am-
meter or a resistor current shunt that is capable
of handling at least 20Adc can be put in series
with the output load in order to measure the
DC1031A-A’s output current.
b.
A voltmeter with a capability of measuring at
least 2.5V can be placed across the output ter-
minals 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 established, ad-
just the load within the operating range and ob-
serve the output voltage regulation, ripple voltage,
efficiency and other desired parameters.
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
3
Figure 1.
Proper Measurement Equipment Setup
Figure 2.
Measuring Input or Output Ripple
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
4
MEASURED DATA
Figures 3 through 11 are measured data for a typical DC1031A-A. Figures 12 through 21 are schematics, bill of mate-
rials and layout.
Figure 3.
Efficiency (200lfm airflow)
Figure 4.
Output Ripple Voltage (72Vin, 20Aout)
50mV/div
2us/div
80
82
84
86
88
90
92
6 8 10 12 14 16 18 20
LOAD CURRENT (A)
EFFICIENCY (%)
36V
48V
72V
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
5
Figure 5.
Output Voltage Transient Response (48Vin, 10A to 20A step)
Vout
100mV/DIV
Iout
10A/div
20us/DIV
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
6
Figure 6.
Temp Data (48Vin, 20A, 25
C, 200LFM airflow – front)
Figure 7.
Temp Data (48Vin, 20A, 25
C, 200LFM airflow – back)
Figure 8.
Temp Data (36Vin, 20A, 25
C, 200LFM airflow – front)
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
7
Figure 9.
Temp Data (36Vin, 20A, 25
C, 200LFM airflow – back
Figure 10.
Temp Data (72Vin, 20A, 25
C, 200LFM airflow – front)
Figure 11.
Temp Data (72Vin, 20A, 25
C, 200LFM airflow – back)
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
8
Figure 12.
Simplified Schematic
VIN
100
R54
-Vout
R89
910
(SOT6)
-VOUT
C3,C4,C5
100V
3x1.0uF
C2
1.0uF
100V Si7336ADP
Q12
330pF
C70
100
R55
C55
470pF
CUSTOMER NOTICE
(SOT89)
C77
2.2uF
VA
R76
1K
1/4W
R61
100
C67
25V
4.7uF
Si7336ADP
Q14
1.91K
PT-
C73
470pF
R2
1.2
1/4W
C72
0.1uF
160K
R48
1W
LINEAR TECHNOLOGY CORPORATION
CONFIDENTIAL
THIS CIRCUIT IS DISTRIBUTED
TO CUSTOMERS ONLY FOR USE
WITH LTC PARTS.
C78
33nF
C24
1uF
+Vout
2.2nF
VSW
VIN
-VOUT
VA
R66
100K
R18
365K
R22
15.0K
+
C68
220uF
6.3V
C71
1uF
C75
47pF
R29
100K
C30
2.2nF
250V
L1
1uH
+Vin
CMPSH1-4
FDC2512
Q28
R58
5.1K
D29
1N4148W
Q27
FCX491
-Vin
0.039
R51
2.4
1/4W
LTC3725EM SE
U1
3
8
9
10
7
2
4
5
1
6
11
NDRV
VCC
VSLMT
IS
GATE
SSFLT
FB/IN+
FS/IN-
ULVO
PGND
GND
-VOUT
D28
MMBZ5236B
7.5V
36-72Vin
1uF,100V TDK C3225X7R2A105M (1210)
100uF, 6.3V CER TDK C3225X5R0J107M (1210)
C68 Sanyo 6TPE220MI
C30 Murata GA343QR7GD222KW01L (1812)
L1 Vishay IHLP-2525CZER1R0M-01
L2 Cooper HC1-R87
T1 PA0865 (4:4:1:1)
T2 Pulse PA0297 2(1.4mH):1:1
PT-
C66
1nF
200V
R41
2.5V/20A
T2
8
1
6
3
4
5
D25
U2
LT C3726EGN
5
2
12
4
8
11
10
1
16
15
14
7
9
6
3
13
ITH
FG
SW
FB/PH
GND
IS+
IS-
SG
VCC
PT+
PT-
SLP
FS/SY NC
RUN/SS
MODE
PGND
VCC
R79
510
R69
0ohms
R50
0.002
1W
L2
0.87uH
-VOUT
C31,C33
2x100uF
6.3V
VSW
R3
100
LINEAR T ECHNO LO GY HAS MADE A BEST EF F ORT T O DESIG N A CIRCUIT
THAT MEETS CUSTO MER-SUPPLIED SPECIF ICAT IO NS; HOW EVER, IT
REMAINS T HE CUST OMER'S RESPONSIBILIT Y T O VERIF Y PROPER AND
RELIABLE O PERAT ION IN T HE ACT UAL APPLICAT IO N. CO MPONENT
SUBST IT UT ION AND PRINT ED CIRUIT BOARD LAYOUT MAY SIG NIF ICANTLY
AFFECT CIRCUIT PERF O RMANCE OR RELIABILIT Y. CO NT ACT LINEAR
TECHNO LO GY APPLICAT IONS ENGINEERING F OR ASSISTANCE.
C69
50V
Si7450DP
Q8
Q34
2N7002
T1
23.4 x 20.1 x 9.4mm PLANAR
72
4
115
3 9
10
C27
330pF
R46
604
R68
6.2K
C81
10pF
C79
2.2nF
R63
C29
33nF
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
9
Figure 13.
Full Board Schematic
R54
100
1%
opt.
For All The Versions
C2-C5 1uF,100V TDK C3225X7R2A105M (1210)
C31,C33 100uF, 6.3V CER TDK C3225X5R0J107M (1210)
C68 Sanyo 6TPE220MI
L1 Vishay IHLP-2525CZER1R0M-01 or
COOPER HCP0703-1R0-R
L2 Coil Tronics HC1-R87
T2 Pulse PA0297 2(1.4mH):1:1
R3
100
C69
*
50V
PT-
R66
100K
R18
365K
E2
opt
R68
6.2K
R63
*
R56
opt.
R87
0
C33
100uF
6.3V
3.3V/20A
+
R46
604
C31
100uF
6.3V
Q28
FDC2512
3
4 1
2
5
6
-Vout
160K
PA0815(6:6:2:1)
+VOUT
C70
330pF
R49
0
R69
*
R58
5.1K
D29
1N4148W
2.5V/20A
CMPSH1-4
A
DC1031A
Wednesday , August 23, 2006
11
J. WU 12/5/05
K. Mathews 12/5/05
LTC3725EMSE, LTC3726EGN, 36V - 72Vin Forward Converter
SIZE
SCALE:
CAGE CODE DWG NO REV
SHEET OF
FILENAME:
TITLE
CONTRACT NO.
APPROVALS DATE
DRAWN
CHECKED
APPROVED
ENGINEER
DESIGNER
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
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
CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
CUSTOMER NOTICE
R41
*
R52
opt.
1/4W
R51
2.4
1/4W
D25
*
LTC3725EMSE
U1
3
8
9
10
7
2
4
5
1
6
11
NDRV
VCC
VSLMT
IS
GA T E
SSFLT
FB/IN+
FS/IN-
ULVO
PGND
GND
1.5nF
VSW
R48
*
1W
C81
10pF
Vout/Iout
C79
2.2nF
E7
910
R89
*
Q11
opt.
4
5
2 3
6 7 8
1
100K5.0V/20A
D1
*
E8
-VOUT
Q8
Si7450DP
4
5
2 3
6 7 8
1
4.42K PA0811(4:4:2:1)
VCC
VA
160K
C67
4.7uF
25V
*
C55
470pF
Q34
2N7002
1
2 3
R76
1K
1206
2.74K
C69
VIN
R61
100
R63
C75
47pF
Q25
opt.
VERSION TABLE
R50
0.002
1W
R41 R89
VSW
+Vout
R69
C5
100V
1.0uF
C73
470pF
C66
1nF
200V
C24
1uF
C78
33nF
C4
100V
1.0uF
1.91K 910
VIN
R55
100
1%
Q26
opt.
R85
*
D28
MMBZ5236B
7.5V
0
R88
0-VOUT
R29
100K
T2
8
1
6
3
4
5
C2
1.0uF
100V
CMPSH1-4
Q14
Si7336ADP
4
5
23
678
1
0.039
124K
+Vin
C71
1uF
C77
2.2uF
opt.
PT-
DC1031A-A
R48 T1
VCC
+
C80
220uF
6.3V
opt.
0
E1
R75
opt.
R2
1.2
1/4W
-Vin
D1
R22
15.0K
C3
1.0uF
100V
+
C68
220uF
6.3V
0.022
PA0865(4:4:1:1)
-VOUT
C72
0.1uF
36-72Vin
VA
R79
510
E3
VERSION
opt.
Q32
opt.
R85
2.2nF
-VOUT
U2
LTC3726EGN
5
2
12
4
8
11
10
1
16
15
14
7
9
6
3
13
ITH
FG
SW
FB/PH
GND
IS +
IS -
SG
V CC
PT+
PT-
S LP
FS /S Y NC
RUN/S S
MO DE
P G ND
R77
0
-VOUT
T1
*
72
4
115
310
9
8
C76
opt.
R86
opt.
L2
0.87uH
L1
1.0uH
DC1031A-B
D25
C23
opt.
R53
opt.
0.039 2.2nF
C30
2.2nF
250V
C27
330pF
Q12
Si7336ADP
4
5
23
678
1
R83
0
C29
33nF
Q27
FCX491
1
23
DC1031A-C
E4
536
opt
VA
-
CMPSH1-4
R84
0
Q33
opt.
VCC
3.01K
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
10
Item Qty Reference Part Description Manufacture / Part #
REQUIRED CIRCUIT COMPONENTS
1
1 4 C2,C3,C4,C5 CAP., X7R, 1.0uF, 100V, 20%, 1210 TDK, C3225X7R2A105M
2 2 C71,C24 CAP., X7R, 1uF, 16V 10%, 0805 TAIYO YUDEN, EMK212BJ105KG
3 2 C27,C70 CAP., X7R, 330pF, 25V, 10%, 0603 AVX, 06033C331KAT2A
4 2 C29,C78 CAP., X7R, 33nF, 25V, 10%, 0603 AVX, 06033C333KAT2A
5 1 C30 CAP., X7R, 2.2nF, 250V, 10%, 1812 MURATA, GA343QR7GD222KW01L
6 2 C31,C33 CAP., X5R, 100uF, 6.3V, 20%, 1210 TDK, C3225X5R0J107M
7 2 C73,C55 CAP., C0G, 470pF, 25V, 10%, 0603 AVX, 06033A471KAT2A
8 1 C66 CAP., C0G, 1nF, 200V, 10%, 1206 AVX, 12062A102KAT2A
9 1 C67 CAP., X7R, 4.7uF, 25V, 20%, 1206 TDK, C3216X7R1E475M
10 1 C68 CAP., POSCAP, 220uF, 6.3V, 20% 7343 SANYO, 6TPE220MI
11 1 C69 CAP., NPO, 2.2nF, 50V, 10%, 0805 AVX, 08055A222KAT2A
12 1 C72 CAP., X7R, 0.1uF, 25V, 10%, 0805 AVX, 08053C104KAT2A
13 1 C75 CAP., NPO, 47pF, 25V, 10%, 0603 AVX, 06033A470KAT2A
14 1 C77 CAP., X7R, 2.2uF, 16V, 20%, 1206 TDK, C3216X7R1C225M
15 1 C79 CAP., X7R, 2.2nF, 25V, 10%, 0603 AVX, 06033C222KAT2A
16 1 C81 CAP., C0G, 10pF, 50V, 5%, 0603 AVX, 06035A100JAT2A
17 1 D25 DIODE, Schottky, CMPSH1-4, 40V, SOT23 CENTRAL SEMI., CMPSH1-4-LTC
18 1 D28 Diode, MMBZ5236B, SOT23 DIODES INC., MMBZ5236B-7
19 1 D29 Diode, 1N4148W SOD-123 DIODES INC., 1N4148W-7-F
20 1 L1 INDUCTOR, 1.0uH VISHAY DALE, IHLP2525CZER1R0M01
0 L1 (second source) INDUCTOR, 1.0uH COOPER, HCP0703-1R0-R
21 1 L2 INDUCTOR, 0.87uH COOPER, HC1-R87
22 1 Q8 FET, N-CH,. Si7450DP, POWERPAK SO-8 VISHAY, Si7450DP
23 2 Q12,Q14 FET, N-CH,. Si7336ADP, POWERPAK SO-8 VISHAY, Si7336ADP
24 1 Q34 N-CH., Transistor. 2N7002 SOT23 DIODES INC., 2N7002-7-F
25 1 Q27 NPN TRANSISTOR, FCX491 ZETEX, FCX491
26 1 Q28 N-CH FET, 150V, FDC2512, Super SOT-6 FAIRCHILD, FDC2512
27 1 R2 RES., CHIP, 1.2, 1/4W, 5%, 1206 AAC, CR18-1R2JM
28 2 R54,R55 RES., CHIP, 100, 1/16W, 1%, 0603 VISHAY, CRCW06031000FRT6
29 1 R18 RES., CHIP, 365K, 1/8W, 1%, 0805 VISHAY, CRCW0805365KFKEB
30 1 R22 RES., CHIP, 15.0K, 1/16W, 1%, 0603 AAC, CR16-1502FM
31 1 R29 RES., CHIP, 100K, 1/8W, 5%, 0805 AAC, CR10-104JM
32 1 R41 RES., CHIP, 1.91K, 1/16W,1%, 0603 AAC, CR16-1911FM
33 1 R46 RES., CHIP, 604, 1/16W, 1%, 0603 AAC, CR16-6040FM
34 1 R48 RES., CHIP, 0.039, 1W, 2%, 2010 IRC, LRC-LR2010-01-R039-G
35 1 R50 RES., CHIP, 0.002, 1W, 1%, 2512 PANASONIC, ERJM1WTF2M0U
36 1 R51 RES., CHIP, 2.4, 1/4W, 5%, 1206 AAC, CR18-2R4JM
37 1 R58 RES., CHIP, 5.1K, 1/16W, 5%, 0603 AAC, CR16-512JM
38 2 R3,R61 RES., CHIP, 100, 1/16W, 5%, 0603 AAC, CR16-101JM
39 1 R63 RES., CHIP, 160K, 1/16W, 5%, 0603 AAC, CR16-164JM
40 1 R66 RES., CHIP, 100K, 1/16W, 5%, 0603 AAC, CR16-104JM
41 1 R68 RES., CHIP, 6.2K, 1/16W, 5%, 0603 AAC, CR16-622JM
42 1 R69 RES., CHIP, 0, 1/16W, 0603 Panasonic, ERJ3GEY0R00V
43 1 R76 RES., CHIP, 1K, 1/4W, 5%, 1206 AAC, CR18-102JM
44 1 R79 RES., CHIP, 510, 1/8W, 5%, 0805 e3 AAC, CR10-511JM
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
11
45 1 R89 RES., CHIP, 910, 1/16W, 5%, 0603 e3 VISHAY, CRCW0603910RJNEA
46 1 T1 TRANSFORMER, 1750VDC BASIC, PA0865 PULSE, PA0865
47 1 T2 TRANSFORMER, 1500VRMS BASIC, PA0297
PULSE, PA0297
48 1 U1 I.C., LTC3725EMSE, MS10E LINEAR TECH., LTC3725EMSE
49 1 U2 I.C., LTC3726EGN, SSOP16GN LINEAR TECH., LTC3726EGN
ADDITIONAL DEMO BOARD CIRCUIT COMPONENTS
2
1 0 C23,C76 (opt.) CAP., 0603
2 0 C80 (opt.) CAP., POSCAP, 220uF, 6.3V, 20% 7343
3 0 D1 (opt.) DIODE, Schottky, CMPSH1-4, 40V, SOT23
4 0 Q11 (opt.) FET, N-CH, POWERPAK SO-8
5 0 Q25,Q26 (opt.) NPN Transistor, FMMT619, SOT23
6 0 Q32,Q33 (opt.) PNP Transistor, FMMT718, SOT23
7 5 R49,R83,R84,R87,R88 RES., CHIP, 0, 1/16W, 0603 Panasonic, ERJ3GEY0R00V
8 0 R52 (opt.) RES., CHIP, 1206
9 0 R53,R56,R75,R85 (opt.) RES., CHIP, 0603
11 1 R77 RES., CHIP, 0, 1/8W, 0805 AAC, CJ10-000M
12 0 R86 (opt.) RES., CHIP, 0805
HARDWARE-FOR DEMO BOARD ONLY:
1 2 E1,E2 TESTPOINT, TURRET, .094" MILL-MAX, 2501-2
2 2 E3,E4 STUD PEM, KFH-032-10
3 4 E3,E4 (2 EACH) NUT, BRASS, #10-32 ANY
4 2 E3,E4 Ring, Lug Ring # 10 KEYSTONE 8205
5 2 E3,E4 WASHER, STAR #10 BRASS NICHEL ANY
6 2 E8,E7 TURRET, MILL-MAX2308-2-00-44
7 4 (STAND-OFF) STAND-OFF, NYLON 0.50" KEYSTONE 8833 (SNAP ON)
Notes:
1. Required Circuit Components are those parts that are required to implement the circuit function
2. Additional Demo Board Circuit Components are those parts that provide added functionality for the demo board but
are not required in the actual circuit.
Figure 14.
Bill of Materials
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
12
Figure 15.
Top
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
13
Figure 16.
Layer 2
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
14
Figure 17.
Layer 3
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
15
Figure 18.
Layer 4
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
16
Figure 19.
Layer 5
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
17
Figure 20.
Bottom
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1031A-A
36V-72VIN, SYNCHRONOUS FORWARD CONVERTER
18
Figure 21.
Bottom Mirrored