Output variable charging circuit and charger incorporating same

• US 6,218,811 B1
• Filed: 05/12/2000
• Issued: 04/17/2001
• Est. Priority Date: 05/20/1999
• Status: Expired due to Fees

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Tokuyama, Hiroshi
• Primary Examiner(s): Tso, Edward H.
• Application Number:
  US09/569,938
• Time in Patent Office: 340 Days
• Field of Search: 320/124, 320/125, 320/128, 320/134, 320/136, 320/137, 320/160, 320/162, 320/163, 320/164
• US Class Current: 320/137
• CPC Class Codes: H02J 7/007182 in response to battery voltage

Abstract

An output variable charging circuit has a charging control circuit for controlling charging characteristics so as to satisfy a predetermined charging condition; and a charging characteristic detection circuit connected to the charging control circuit, the charging characteristic detection circuit detecting the charging characteristics to obtain a charging characteristic detection value and changing the charging characteristic detection value according to an input external signal so as to feedback to the charging control circuit.

Claims

1. An output variable charging circuit comprising:

a charging control circuit for controlling charging characteristics so as to satisfy a predetermined charging condition; and

a charging characteristic detection circuit connected to the charging control circuit, the charging characteristic detection circuit detecting at least one charging characteristic to obtain a charging characteristic detection value, and changing the charging characteristic detection value according to at least one input external signal so as to feedback to the charging control circuit.

2. The output variable charging circuit of claim 1, wherein the charging characteristic detection circuit comprises at least one of a charging current detection circuit and a charging voltage detection circuit and the at least one charging characteristic is determined by the at least one input external signal.

3. The output variable charging circuit of claim 1, wherein the charging characteristic detection circuit has at least one output coupled to the charging control circuit.

4. The output variable charging circuit of claim 1, wherein the at least one input external signal is coupled to the charging characteristic detection circuit.

5. The output variable charging circuit of claim 1, wherein the at least one input external signal is coupled to the charging control circuit.

11. The output variable charging circuit of claim 1 further comprising a signal conversion circuit for converting the at least one external signal into a converted signal.

6. The output variable charging circuit comprising:

a charging control circuit for controlling charging characteristics such that a predetermined charging condition is changed by at least one input external signal and a changed charging condition is thereby satisfied; and

a charging characteristic detection circuit connected to the charging control circuit, the charging characteristic detection circuit detecting at least one charging characteristic to obtain a charging characteristic detection value so as to feedback the charging characteristic detection value to the charging control circuit.

7. The output variable charging circuit of claim 6, wherein the charging characteristic detection circuit comprises at least one of a charging current detection circuit and a charging voltage detection circuit and the at least one charging characteristic is determined by the at least one input external signal.

8. The output variable charging circuit of claim 6, wherein the charging characteristic detection circuit has at least one output coupled to the charging control circuit.

9. The output variable charging circuit of claim 6, wherein the at least one input external signal is coupled to the charging characteristic detection circuit.

10. The output variable charging circuit of claim 6, wherein the at least one input external signal is coupled to the charging control circuit.

12. The output variable charging circuit of claim 6, further comprising a signal conversion circuit for converting the at least one external signal into a converted signal.

13. A charger comprising an output variable charging circuit comprising:

a charging control circuit for controlling charging characteristics so as to satisfy a predetermined charging condition; and

a charging characteristic detection circuit connected to the charging control circuit, the charging characteristic detection circuit detecting at least one charging characteristic to obtain a charging characteristic detection value, and changing the charging characteristic detection value according to at least one input external signal so as to feedback to the charging control circuit; and

further comprising

a DC power supply for supplying a DC current to the output variable charging circuit, and an external signal source for inputting the at least one input external signal to the output variable charging circuit.

14. A charger comprising an output variable charging circuit comprising:

a charging control circuit for controlling charging characteristics such that a predetermined charging condition is changed by at least one input external signal and a changed charging condition is thereby satisfied; and

a charging characteristic detection circuit connected to the charging control circuit, the charging characteristic detection circuit detecting at least one charging characteristic to obtain a charging characteristic detection value so as to feedback the charging characteristic detection value to the charging control circuit, further comprising;

a DC power supply for supplying a DC current to the output variable charging circuit, and an external signal source for inputting the at least one input external signal to the output variable charging circuit.