USER GUIDE | UG:017
Analog Control DCM3623 and DCM4623 ChiP™
Evaluation Board
Arthur Russell
®
VI Chip
Applications Engineering
October 2014
Contents
Introduction
Contents
Features
Board Description
General Components
Test Points Description
Schematic, Assembly Drawing
and Bill of Materials
Recommended Test
Equipment
Basic Connections
Board Operation Details
Trim Control
Fault Monitoring
Chassis Ground
Paralleling
Arrow.com.
Downloaded from
Introduction
Page
1
The Analog Control DCM3623 and DCM4623 ChiP evaluation boards described in this document are
designed to be used with the DCM family of isolated, DC-DC converters. The DCM3623 board is used
3
for the analog control, low input voltage DCM3623 ChiP products, while the DCM4623 board is used
3
for the analog control, high input voltage (offline) DCM4623 ChiP products.
4
The DCM evaluation board can be configured for various enabling and fault monitoring schemes,
as well as to exercise various modes of trimming, depending on the application requirements. The
4
evaluation board can be used to evaluate DCMs in either a stand-alone configuration, or as an
6
array of modules.
7
Enable options:
1.
Onboard mechanical switch (default)
14
2.
External control
14
14
Trim options:
15
1.
Fixed trim operation (default): the TR pin is permitted to float at initial start up.
15
The DCM disables output trimming and the output trim is programmed to the nominal rated V
16
2.
Variable trim operation, onboard variable resistor: The trim pin voltage is ratiometric,
with a rheostat working against a pull-up resistor inside the DCM to VCC.
16
3.
Variable trim operation, off-board control: The trim pin voltage is controlled via external
programming control, which is referenced to the –IN of each specific DCM in the system.
Fault monitor options:
1.
Onboard LED: the FT pin drives a visible LED for visual feedback on fault status.
2.
Onboard optocoupler: the FT pin drives an onboard optocoupler to bring
fault status across the primary-secondary isolation boundary.
UG:017
.
OUT
Page 1
Need help?
Do you have a question about the ChiP DCM3623 and is the answer not in the manual?
Questions and answers