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DESCRIPTION
The Demo Circuit 2358A is a 2kV AC isolated flyback
μModule
DC/DC converter with LDO post regulator featur-
®
ing the LTM8068. The demo circuit is designed for a 5.6V
flyback output and a 5V post regulator output from a 4.5V
to 40V input. The current capability of the 5.6V flyback
output varies with input voltage from about 200mA at
4.5V
to about 460mA at 40V
IN
the 5V LDO output is limited by either the current capabil-
ity of V
minus V
OUT1
limit on the LDO post regulator itself. Figure 1 shows the
maximum output current on V
loaded, and V
OUT2
LDO post regulator from V
BOARD PHOTO
Arrow.com.
Downloaded from
Isolated μModule DC/DC Converter
. The current capability of
IN
loading or the 300mA current
OUT1
when V
OUT1
when V
is unloaded. V
OUT1
.
OUT1
DEMO MANUAL DC2358A
The two-stage converter provides an isolated flyback output
as well as a low-noise LDO output. Figure 2 shows the
output noise spectrum on the flyback output and Figure
3 shows the output noise spectrum on the LDO output.
The LTM8068 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 2358A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2358A
is not
OUT2
is the
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of
OUT2
Linear Technology Corporation. All other trademarks are the property of their respective owners.
LTM8068
with LDO Regulator
dc2358af
1
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Table of Contents
Related Manuals for Linear Technology DC2358A
Summary of Contents for Linear Technology DC2358A
- Page 1 V when V is unloaded. V is the L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of OUT2 OUT1 OUT2 Linear Technology Corporation. All other trademarks are the property of their respective owners.
-
Page 2: Performance Summary
DEMO MANUAL DC2358A PERFORMANCE SUMMARY Specifications are at T = 25°C PARAMETER CONDITIONS UNITS Minimum Input Voltage Maximum Input Voltage Output Voltage V = 4.5V to 40V OUT1 Output Voltage V = 4.5V to 40V 4.85 5.15 OUT2 Voltage Ripple V... - Page 3 DEMO MANUAL DC2358A QUICK START PROCEDURE Figure 4. DC2358A Proper Equipment Setup INPUT OR OUTPUT CAPACITOR Figure 5. Measuring Input or Output Ripple dc2358af Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from...
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Page 4: Parts List
DEMO MANUAL DC2358A PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CIN1 CAP ., ALUM, 22µF, 50V, 6.6x6.6mm NICHICON, UUD1H220MCL1GS CAP ., CER., 10µF, X7R, 50V, 10%, 1210 MURATA, GRM32ER71H106KA12L C2, C3 CAP ., CER., 4.7µF, X5R, 10V, 10%, 0603 MURATA, GRM188R61A475KE15D CAP ., CER., 47µF, X5R, 10V, 10%, 1206... -
Page 5: Schematic Diagram
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 6 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.
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