Linear Technology LTM8067 Demo Manual

DESCRIPTION
The Demo circuit 2357A is a 2kV AC isolated flyback
μModule DC/DC converter featuring the LTM8067. The
®
demo circuit is designed for a 5V flyback output from a
4.5V to 40V input. The typical current capability of the 5V
flyback output varies with input voltage from about 200mA
at 4.5V to about 500mA at 40V
IN
maximum output current on V
essary minimum load current to keep the output voltage
in regulation throughout the entire input voltage range.
Please see the typical performance characteristic curves
600
400
200
0
0 10
Figure 1. V Maximum Output Current vs V
OUT
BOARD PHOTO
Isolated μModule DC/DC Converter
. Figure 1 shows the
IN
. R1 provides the nec-
OUT
20 30 40
V (V)
IN
dc2357 F01
IN
DEMO MANUAL DC2357A
in the LTM8067 data sheet to determine the minimum load
current for other input/output configurations.
The LTM8067 data sheet gives complete description of
the device, operation and application information. The
data sheet must be read in conjunction with this quick
start guide for demo circuit 2357A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2357A
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
0
–20
–40
–60
–80
–100
0 0.5 1.0 1.5 2.0
FREQUENCY (MHz)
Figure 2. V Output Noise Spectrum
OUT
with I at 200mA and V
OUT
LTM8067
2.5 3.0 3.5 4.0 4.5 5.0
dc2357 F02
at 12V
IN
dc2357af
1