Advertisement
Quick Links
DESCRIPTION
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 4.7in
area. Synchronous rectification helps to attain an effi-
PERFORMANCE SUMMARY
SYMBOL
PARAMETER
V
Input Supply Range
IN
V
Output Voltage
OUT
I
Output Current Range, Continuous
OUT
f
Switching (Clock) Frequency
SW
V
Output Ripple
OUT(P-P)
I
Output Regulation
REG
P
/P
Efficiency (See Figure 3)
OUT
IN
Isolation
Approximate Solution Size
DEMO MANUAL DC2199A-A
360W Isolated Forward Converter
with Synchronous Rectification
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 LTC sales.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2199A-A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
2
solution footprint
Technology Corporation. All other trademarks are the property of their respective owners.
Specifications are at T
CONDITIONS
200LFM
V
= 24V, I
= 30A (20MHz BW)
IN
OUT
Line and Load (36V
to 60V
IN
V
=48V, I
= 30A
IN
OUT
Basic
Component Area × Top Component Height
LTC3765/LTC3766
= 25°C
A
MIN
36
11.76
0
, 0A
to 30A
)
IN
OUT
OUT
TYP
MAX
UNITS
60
V
12.0
12.24
V
30
A
200
kHz
60
mV
P-P
±0.02
%
96
%
1500
VDC
2
4.7in
× 0.6
Inches
dc2199aafa
1
Advertisement
Subscribe to Our Youtube Channel
Related Manuals for Linear Technology LTC3765
Summary of Contents for Linear Technology LTC3765
- Page 1 L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear and other applications. It has a 4.7in solution footprint Technology Corporation.
-
Page 2: Operating Principles
This may require a damping impedance, which is provided When input voltage is applied, the LTC3765 commences by R1. (See Linear Technology Application Note 19 for a soft-start of the output voltage. When the output reaches discussion of input filter stability.) R1 is coupled through the RUN threshold, the LTC3766 comes alive and takes a tiny 2mm ×... - Page 3 DEMO MANUAL DC2199A-A QUICK START PROCEDURE b. A voltmeter with a capability of measuring at least 12V 8. Once the proper output voltage is again established, can be placed across the output terminals in order adjust the load within the operating range and observe to get an accurate output voltage measurement.
- Page 4 DEMO MANUAL DC2199A-A QUICK START PROCEDURE Figure 3. Output Ripple at 48V and 30A (50mV, 10A, 2µs/DIV, 20MHz) Figure 4. Transient Response Waveform at 48V and 15A to 30A to 15A (10A, 500mV, 200µs/DIV) dc2199aafa...
- Page 5 DEMO MANUAL DC2199A-A QUICK START PROCEDURE Figure 5. Thermal Map, Front Side at 48V and 30A = 25°C, 200LFM) Figure 6. Thermal Map, Back Side at 48V and 30A = 25°C, 200LFM) dc2199aafa...
-
Page 6: Parts List
DEMO MANUAL DC2199A-A PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components C1, C22 Cap., Alum., Elect., 33µF, 80V, CAP-10X12.5 PANASONIC, EEHZA1K330P C2, C3, C4, C5, C6 CAP., X7R, 4.7µF, 100V, 10%, 1210 MURATA, GRM32ER72A475KE14 C7, C31, C33, C68 CAP., POSCAP, 150µF, 16V, 20%, 7343 PANASONIC, 16TQC150MYF CAP., X7R, 2.2nF, 630V, 5%, 1206... - Page 7 DEMO MANUAL DC2199A-A PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER RES., CHIP, 1k, 1/16W, 1%, 0603 VISHAY, CRCW06031K00FKEA RES., CHIP, 604, 1/16W, 1%, 0603 VISHAY, CRCW0603604RFKEA R51, R52 RES., CHIP, 3.0, 1/4W, 5%, 1206 PANASONIC, ERJ-8GEYJ3R0V RES., CHIP, 6.8, 1/2W, 1%, 1206 PANASONIC, ERJ-8RQF6R8V RES., CHIP, 2.15k, 1/16W, 1%, 0603 VISHAY, CRCW06032K15FKEA...
- Page 8 DEMO MANUAL DC2199A-A PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER R6, R7, R8, R9, R49, R103, R111, R112, RES., CHIP, 0Ω, 0603 VISHAY, CRCW06030000Z0EA R113, R122, R124, R137, R146 R10, R13, R14, R15 RES., OPT, 2512 R17, R108, R116, R127 RES., OPT, 1206 R25, R26, R27, R28, R30, R31, R32, R33, RES., OPT, 0603...
-
Page 9: Schematic Diagram
DEMO MANUAL DC2199A-A SCHEMATIC DIAGRAM dc2199aafa... - Page 10 DEMO MANUAL DC2199A-A SCHEMATIC DIAGRAM dc2199aafa...
- Page 11 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.
- Page 12 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.
Need help?
Do you have a question about the LTC3765 and is the answer not in the manual?
Questions and answers