Synchronous rectifier circuit capable of working as a high-efficiency DC/DC converter
First Claim
1. A synchronous rectifier circuit (30) working as a high-efficiency DC/DC converter for mixed step-up/step-down applications, the circuit having a regulating loop structure and comprising:
- an input terminal (IN) receiving a voltage signal (Vin), a second input terminal node (X) connected to an external inductor (L), and an output terminal (OUT);
a power switch (Q7) connected between said terminal node (X) and said output terminal (OUT) to convert on its output a voltage (Vlx) presented at one end of said inductor (L);
a driver circuit (15) for driving the power switch (Q7), and a comparator (25) sensing the potential difference between the output and input terminals (OUT,IN) and to produce an enable signal for the driver circuit (15);
characterised in that;
said comparator (25) is a wide pass-band comparator forcing prompt triggering of the regulation loop in the rectifier.
1 Assignment
0 Petitions
Accused Products
Abstract
A synchronous rectifier circuit operates as a high-efficiency DC/DC converter for mixed step-up/step-down applications, and includes an input terminal receiving a voltage signal, a second input terminal node connected to an external inductor, and an output terminal. A power switch may be connected between the second input terminal node and the output terminal to generate on its output a voltage at one terminal of the inductor. A driver circuit is provided for driving the power switch, and a comparator senses the potential difference between the output and input terminals and produces an enable signal for the driver circuit. The comparator may be a wide pass-band comparator forcing prompt triggering of the regulation loop in the rectifier.
15 Citations
8 Claims
-
1. A synchronous rectifier circuit (30) working as a high-efficiency DC/DC converter for mixed step-up/step-down applications, the circuit having a regulating loop structure and comprising:
-
an input terminal (IN) receiving a voltage signal (Vin), a second input terminal node (X) connected to an external inductor (L), and an output terminal (OUT);
a power switch (Q7) connected between said terminal node (X) and said output terminal (OUT) to convert on its output a voltage (Vlx) presented at one end of said inductor (L);
a driver circuit (15) for driving the power switch (Q7), and a comparator (25) sensing the potential difference between the output and input terminals (OUT,IN) and to produce an enable signal for the driver circuit (15);
characterised in that;
said comparator (25) is a wide pass-band comparator forcing prompt triggering of the regulation loop in the rectifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification