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DCS Datasheet(PDF) 14 Page - Delta Electronics, Inc.

Part No. DCS
Description  Voltage and resistor-based trim
Download  20 Pages
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Manufacturer  DELTA [Delta Electronics, Inc.]
Direct Link  http://www.deltaww.com
Logo DELTA - Delta Electronics, Inc.

DCS Datasheet(HTML) 14 Page - Delta Electronics, Inc.

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Power Good
The DCS modules provide a Power Good (PGOOD)
signal that is implemented with an open-drain output to
indicate that the output voltage is within the regulation
limits of the power module. The PGOOD signal will be
de-asserted to a low state if any condition such as over
temperature, over current or loss of regulation occurs that
would result in the output voltage going ±10% outside the
set point value. The PGOOD terminal should be
connected through a pull up resistor (suggested value
Ω) to a source of 5VDC or lower.
Monotonic Start-up and Shutdown
The DCS 6A modules have monotonic start-up and
shutdown behavior for any combination of rated input
voltage, output current and operating temperature range.
After the 10msec delay, an analog voltage is applied to
the SEQ pin and the output voltage of the module will
track this voltage on a one-to-one volt bases until the
output reaches the set-point voltage. To initiate
simultaneous shutdown of the modules, the SEQ pin
voltage is lowered in a controlled manner. The output
voltage of the modules tracks the voltages below their
set-point voltages on a one-to-one basis. A valid input
voltage must be maintained until the tracking and output
voltages reach ground potential.
When using the EZ-SEQUENCETM feature to control
start-up of the module, pre-bias immunity during startup is
disabled. The pre-bias immunity feature of the module
relies on the module being in the diode-mode during
start-up. When using the EZ-SEQUENCETM feature,
modules goes through an internal set-up time of 10msec,
and will be in synchronous rectification mode when the
voltage at the SEQ pin is applied. This will result in the
module sinking current if a pre-bias voltage is present at
the output of the module.
Figure 39: Circuit showing connection of the sequencing signal to
the SEQ pin.

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