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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 4.7in
2
solution 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 LTC sales.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2199A-A
Specifications are at T
A
= 25°C
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IN
Input Supply Range
36
60
V
V
OUT
Output Voltage
11.76
12.0
12.24
V
I
OUT
Output Current Range, Continuous
200LFM
0
30
A
f
SW
Switching (Clock) Frequency
200
kHz
V
OUT(P-P)
Output Ripple
V
IN
= 24V, I
OUT
= 30A (20MHz BW)
60
mV
P-P
I
REG
Output Regulation
Line and Load (36V
IN
to 60V
IN
, 0A
OUT
to 30A
OUT
)
±0.02
%
P
OUT
/P
IN
Efficiency (See Figure 3)
V
IN
=48V, I
OUT
= 30A
96
%
Isolation
Basic
1500
VDC
Approximate Solution Size
Component Area × Top Component Height
4.7in
2
× 0.6
Inches
