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S24A12E300BN Datasheet(PDF) 11 Page - Vicor Corporation |
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S24A12E300BN Datasheet(HTML) 11 Page - Vicor Corporation |
11 / 15 page 24V Maxi Family Rev 6.6 vicorpower.com Page 11 of 15 01/2016 800 927.9474 24V Input Module Enable/Disable The module may be disabled by pulling PC below 2.3V with respect to the –Input. This may be done with an open collector transistor, relay, or optocoupler. Multiple converters may be disabled with a single transistor or relay either directly or via “OR’ing” diodes. See Figure 2. Primary Auxiliary Supply At 5.7V, PC can source up to 1.5mA. In the example shown in Figure 4, PC powers a module enabled LED. Module Alarm The module contains “watchdog” circuitry which monitors input voltage, operating temperature and internal operating parameters. In the event that any of these parameters are outside of their allowable operating range, the module will shut down and PC will go low. PC will periodically go high and the module will check to see if the fault (as an example, overtemperature) has cleared. If the fault has not been cleared, PC will go low again and the cycle will restart. The SC pin will go low in the event of a fault and return to its normal state after the fault has been cleared. See Figures 3 and 5. Primary Control - PC PIN +IN PC PR –IN Disable Disable = PC <2.3 V Figure 2 — Module enable/disable Figure 4 — LED on-state indicator +IN PC PR –IN 4 k "Module Enabled" +IN PC PR –IN Optocoupler 4 k Alarm 1.00V +OUT +S SC –S –OUT +IN PC PR –IN Comparator +OUT +S SC –S – OUT +IN PC PR –IN Input Undervoltage 2-20 ms typ. f (VIN) Auto Restart 5.7 Vdc (0-3 mA) 50 SW2 SW3 1.23 Vdc 6 K 1 K SW1 SW1, 2, & 3 shown in "Fault" position Input Overvoltage (See Note 1) Overtemperature Module Faults 1 Not applicable for 300 Vdc input family 1 M Figure 3 — PC/SC module alarm logic Figure 6 — Isolated on-state indicator 2–20 ms typ. Fault SC PC 1.23 V 5.7 V 40 s typ. Figure 5 — PC/SC module alarm timing Figure 7 — Secondary side on-state indicator |
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