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DCS Datasheet(PDF) 14 Page - Delta Electronics, Inc. |
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DCS Datasheet(HTML) 14 Page - Delta Electronics, Inc. |
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14 / 20 page  DS_DCS12S0A0S06NFA_11142013 14 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 100K 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. FEATURE DESCRIPTIONS (CON.) 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. Simultaneous |
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