Start up circuit for a boost mode controller

Details Start up circuit for a boost mode controller Start up circuit for a boost mode controller

1998-04-21

1999-06-15

Nappi, Robert E.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323222, G05F 1563

Patent

active

059125519

ABSTRACT:
A boost mode controller with start up circuit includes: an inductor 12; a transistor 10 coupled to a first end of the inductor 12; a diode 16 having an anode coupled to the first end of the inductor 12; a capacitor 14 coupled to a cathode of the diode 16; a logic circuit 22 having an output coupled to a control node of the transistor 10; a comparator 28 having an output coupled to a first input of the logic circuit 22, a first input of the comparator 28 coupled to the capacitor 14, and a second input of the comparator 28 coupled to a reference node; and a counter 20 having an active low reset coupled to the output of the comparator 28 and an output coupled to a second input of the logic circuit 22.

REFERENCES:
patent: 5612610 (1997-03-01), Borghi et al.
patent: 5629610 (1997-05-01), Pedrazzini et al.

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