VICOR DCM2322 User Manual

USER GUIDE | UG:020
Analog Control DCM2322 ChiP™
Evaluation Board
VamshiKrishna Domudala
Applications Engineering
Contents Page
Introduction
Contents
Features
Board Description
General Components
Test Points Description
Schematic
Assembly Drawing
Bill of Materials
Recommended
Test Equipment 10
Basic Connections 10
Board Operation Details 10
EN (Enable) 11
Trim Control 12
Chassis Ground / EMI_GND 13
Paralleling 13

Introduction

1
The Analog Control DCM2322 ChiP evaluation board described in this document is designed to be used
3 with the DCM family of isolated, DC-DC converters. The DCM2322 board is used for the analog control,
low input voltage DCM2322 ChiP products.
3
The DCM evaluation board can be configured for various enabling and fault-monitoring schemes,
4
as well as to exercise various modes of trimming, depending on the application requirements. The
evaluation board can be used to evaluate DCMs in either a standalone configuration or as an
4
array of modules.
5
6
Operation Mode Options
7
Operation mode of the DCM can be selected based on the voltage seen by the DCM at its EN pin at first
8 start up following application of V
1.
Array mode (default): the EN pin is permitted to float at initial start up.
The DCM enables the output and latches in array mode of operation.
2. Enhanced V Regulation mode: applying a specified voltage level on the EN pin during initial
OUT
start up will latch the DCM in enhanced V
Enable options:
1. On-board mechanical switch (default)
2.
External control
Trim options:
1. Fixed trim operation (default): the TR pin is permitted to float at initial start up.
The DCM disables output trimming and the output trim is programmed to the nominal rated V
2. Variable trim operation, on-board variable resistor: The trim pin voltage is ratiometric,
with a rheostat working against a pull-up resistor inside the DCM to V
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.
On-board LED: the FT pin drives a visible LED for visual feedback on fault status.
2. On-board optocoupler: the FT pin drives an on-board optocoupler to bring
fault status across the primary-secondary isolation boundary.
. Two operation modes that can be selected are:
IN
regulation mode.
OUT
INFORMATION SUBJECT TO CHANGE WITHOUT NOTICE
UG:020
.
OUT
.
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