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2016-09-19 03:34  
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Short-circuit protected current boost regulator using the ECG9XX series of regulators.The ratings of the ECG9XX series are as follows: ECG960, 5 volts; ECG962, 6 volts; ECG966, 12 volts; ECG968, 15 volts; and ECG972, 24 volts. The current-sensing ECG2:8 transistor must be able to handle the current of the three-terminal regulator; therefore, a 4-ampere transistor is specified. Resistor R in conjunction with the VBE of the pass transistor determines when the transistor begins to conduct. Input-output differential voltage minimum is increased by the VBE of the pass transistor (courtesy GTE Sylvania Incorporated).