Current-mode controller for switching DC/DC converter having a r

Details Current-mode controller for switching DC/DC converter having a r Current-mode controller for switching DC/DC converter having a r

1999-07-06

2000-12-19

Riley, Shawn

Electricity: power supply or regulation systems

Output level responsive

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

323284, G05F 140

Patent

active

061631426

ABSTRACT:
A switch arranged between a DC power supply source and a load is driven depending on the state of a flip-flop circuit. An error amplifier outputs an instruction value signal determined based on an output voltage. A comparator outputs a first reset signal when an inductor current reaches the instruction value signal. An oscillator generates a set pulse. A first AND gate feeds as a second reset signal an AND-operation result between the Q-output of the flip-flop circuit and the first reset signal to the reset terminal of the flip-flop circuit and the negative logic input terminal of a second AND gate. The second AND gate feeds the set pulse to the set terminal of the flip-flop circuit according to the second reset signal.

REFERENCES:
patent: 5418178 (1995-05-01), Shoji
patent: 5705919 (1998-01-01), Wilcox
patent: 5731694 (1998-03-01), Wilcox et al.
patent: 5959443 (1999-09-01), Littlefield
patent: 5973485 (1999-10-01), Kates et al.
patent: 5994885 (1999-11-01), Wilox et al.
"High Efficiency Low Noise Synchronous Step-Down Switching Regulator", Linear Technology, Initial Release, Final Electrical Specifications, LTC1435, Apr. 1996 p. 1-16.
"Dual-Output Power-Supply Controller for Notebook Computers", MAX786, MAXIM, Maxim Integrated Products, 19-0160; Rev 1; May 1994 p. 1-24.

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