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EHHD006A0B41Z Datasheet(PDF) 7 Page - Lineage Power Corporation |
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EHHD006A0B41Z Datasheet(HTML) 7 Page - Lineage Power Corporation |
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7 / 19 page  Data Sheet August 29, 2011 EHHD006A0B Series Eighth-Brick Power Modules 18 - 75Vdc Input; 12V/6Adc Output LINEAGE POWER 7 Feature Descriptions Remote On/Off Two remote On/Off options are available. Positive logic turns the module on during a logic high voltage on the On/Off pin and off during a logic low. Negative logic remote On/Off, device code suffix “1”, turns the module off during a logic high and on during a logic low. ON/OFF Vin+ Vin- Ion/off Von/off Vout+ TRIM Vout- Figure 10. Remote On/Off Implementation. To turn the power module on and off, the user must supply a switch (open collector or equivalent) to control the voltage (Von/off) between the On/Off terminal and the VIN(-) terminal (see Figure 10). Logic low is 0V ≤ Von/off ≤ 1.2V. The maximum Ion/off during a logic low is 1mA and the switch should maintain a logic low level while sinking this current. During a logic high, the typical maximum Von/off generated by the module is 5.6V and the maximum allowable leakage current at Von/off = 5.6V is 25μA. If not using the remote On/Off feature: For positive logic, leave the On/Off pin open. For negative logic, short the On/Off pin to VIN(-). Remote Sense Remote sense minimizes the effects of distribution losses by regulating the voltage at the remote-sense connections (See Figure 11). The voltage between the remote-sense pins and the output terminals must not exceed the output voltage sense range given in the Feature Specifications table: [VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] 0.5 V Although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. The maximum increase is the larger of either the remote sense or the trim. The amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. When using remote sense and trim, the output voltage of the module can be increased, which at the same output current would increase the power output of the module. Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power (maximum rated power = Vo,set x Io,max). Figure 11. Circuit Configuration for Remote Sense . Input Undervoltage Lockout At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will only begin to operate once the input voltage is raised above the undervoltage lockout turn-on threshold, VUV/ON. Once operating, the module will continue to operate until the input voltage is taken below the undervoltage turn-off threshold, VUV/OFF. Overtemperature Protection To provide protection under certain fault conditions, the unit is equipped with a thermal shutdown circuit. The unit will shutdown if the thermal reference point, Tref, exceeds 135 OC (Figure 13, typical) or 120 OC (Figure 14, typical), but the thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. The module will automatically restart upon cool-down to a safe temperature. Output Overvoltage Protection The output overvoltage protection scheme of the modules has an independent overvoltage loop to prevent single point of failure. This protection feature latches in the event of overvoltage 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. 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 hiccup mode. If the unit is not configured with auto–restart, it will latch off following the overcurrent condition. The module can be restarted by cycling the DC input power for at least VO(+) SENSE(+) SENSE(–) VO(–) VI(+) VI(-) IO LOAD CONTACT AND DISTRIBUTION LOSSE SUPPLY II CONTACT RESISTANCE |
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