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NCP100 Datasheet(PDF) 9 Page - ON Semiconductor |
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NCP100 Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 12 page NCP100 http://onsemi.com 9 Figure 26. High Current Shunt Regulator Vin Vout R1 R2 Vout + 1 ) R1 R2 V REF Figure 27. Low Dropout Series Pass Regulator Vin Vout R1 R2 Vout + 1 ) R1 R2 V REF Rin Vout min + 0.9 V ) Vbe Vout min + VREF AC Line Input Figure 28. Offline Converter with Isolated DC Output 1/2 Opto NCP 100 Isolated DC Output 1/2 Opto UC3842 Minimum Vout = (0.9 + 1.4) = 2.3 V S R Q R1 R2 + The circuit in Figure 28 uses the NCP100 as a compensated amplifier for controlling the feedback loop of an isolated output line powered converter. This device allows the converter to directly regulate the output voltage at a significantly lower level than obtainable with the common TL431 device family. The output voltage is programmed by the resistors R1 and R2. The minimum regulated DC output is limited to the sum of the lowest allowable cathode to anode voltage (0.9 V) and the forward drop of the optocoupler light emitting diode (1.4 V). |
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