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EQD075A81Z Datasheet(PDF) 10 Page - Lineage Power Corporation |
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EQD075A81Z Datasheet(HTML) 10 Page - Lineage Power Corporation |
10 / 15 page Data Sheet March 25, 2008 EQD075 Series Single Output: Eighth Brick Power Modules: 18-60Vdc Input; 3.3 to 5.0Vdc Output; 75W LINEAGE POWER 10 Feature Descriptions Remote On/Off The EQD075 series power modules have primary referenced remote On/Off. The remote on/off is open collector compatible with the signal common referenced to the negative input. The standard remote on/off negative logic is such that a unit operates (ON) when the remote on/off signal is low or short circuit to minus VIN. A module will be OFF when the remote on/off pin is open circuit or when the remote on/off signal is high. The optional positive logic remote on/off is such that a unit operates (ON) when the remote on/off signal is high or open-circuit. A unit will be OFF when the remote on/off signal is low or short-circuited to minus VIN. ON/OFF VIN(+) VIN(-) Ion/off Von/off VO COM Figure 20. Circuit configuration for using Remote On/Off Implementation. Overcurrent Protection To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters a hiccup mode. If the unit is not configured with auto–restart, then it will latch off following the over current condition. The module can be restarted by cycling the dc input power for at least one second or by toggling the remote on/off signal for at least one second. If the unit is configured with the auto-restart option (4), it will remain in the hiccup mode as long as the overcurrent condition exists; it operates normally, once the output current is brought back into its specified range. Input Undervoltage Lockout At input voltages below the input under voltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the under voltage lockout turn-on threshold. Overtemperature Protection These modules feature an overtemperature protection circuit to safeguard against thermal damage. The circuit shuts down and latches off the module when the maximum device reference temperature is exceeded. The module can be restarted by cycling the dc input power for at least one second or by toggling the remote on/off signal for at least one second. If the auto-restart option (4) is ordered, the module will automatically restart upon cool-down to a safe temperature. Over Voltage Protection The output over voltage protection scheme of the modules has an independent over voltage loop to prevent single point of failure. This protection feature latches in the event of over voltage across the output. Cycling the on/off pin or input voltage resets the latching protection feature. If the auto-restart option (4) is ordered, the module will automatically restart upon an internally programmed time elapsing. Remote sense The EQD075 series power modules have a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage at the Remote Sense pin (See Figure 21). The voltage between the Sense pin and Vo pin must not exceed 0.5V. The opened sense line resistor value should be selected in range of 30 ohm – 100 ohm that eases use of external parallel load share controller. The amount of power delivered by the module is defined as the output voltage multiplied by the output current (Vo x Io). When using Remote Sense, the output voltage of the module can increase, which, if the same output is maintained, increases the power output from the module. Make sure that the maximum output power of the module remains at or below the maximum rated power. When the Remote Sense feature is not being used, connect the Remote Sense pins to the output pins of the module. VO(+) SENSE(+) SENSE(–) VO(–) VI(+) VI(-) IO LOAD CONTACT AND DISTRIBUTIONLOSSES SUPPLY II CONTACT RESISTANCE Figure 21. Effective Circuit Configuration for remote sense operation. |
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