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DNL12S0A0S16NFA Datasheet(PDF) 9 Page - Delta Electronics, Inc. |
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DNL12S0A0S16NFA Datasheet(HTML) 9 Page - Delta Electronics, Inc. |
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9 / 16 page  DS_DNL04SIP16A_10052006 9 Vo On/Off Vin GND Q1 RL Rpull- up I ON/OFF Figure 35: Negative remote On/Off implementation Over-Current Protection To provide protection in an output over load fault condition, the unit is equipped with internal over-current protection. When the over-current protection is triggered, the unit enters hiccup mode. The units operate normally once the fault condition is removed. DESIGN CONSIDERATIONS (CON.) The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect the stability of the module. An input capacitance must be placed close to the modules input pins to filter ripple current and ensure module stability in the presence of inductive traces that supply the input voltage to the module. Safety Considerations For safety-agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a maximum 20A of glass type fast-acting fuse in the ungrounded lead. FEATURES DESCRIPTIONS Remote On/Off The DNM/DNL series power modules have an On/Off pin for remote On/Off operation. Both positive and negative On/Off logic options are available in the DNM/DNL series power modules. For positive logic module, connect an open collector (NPN) transistor or open drain (N channel) MOSFET between the On/Off pin and the GND pin (see figure 34). Positive logic On/Off signal turns the module ON during the logic high and turns the module OFF during the logic low. When the positive On/Off function is not used, leave the pin floating or tie to Vin (module will be On). For negative logic module, the On/Off pin is pulled high with an external pull-up resistor (see figure 35). Negative logic On/Off signal turns the module OFF during logic high and turns the module ON during logic low. If the negative On/Off function is not used, leave the pin floating or tie to GND. (module will be On) Vo On/Off Vin GND Q1 RL I ON/OFF Figure 34: Positive remote On/Off implementation |
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