Circuit arrangement for generating dc voltages

• US 20050127754A1
• Filed: 04/09/2003
• Published: 06/16/2005
• Est. Priority Date: 04/18/2002
• Status: Abandoned Application

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Muth, Matthias
• Application Number:
  US10/511,492
• Publication Number:
  US 20050127754A1
• Time in Patent Office: Days
• US Class Current: 307/10.100
• CPC Class Codes: H02M 1/009 having two or more independently controlled outputs for DC-DC converter with intermediate AC H02M3/33561
• CPC Class Codes: H02M 3/155 using semiconductor devices only

Abstract

A circuit arrangement for vehicles for generating at least two DC output voltages (V_A1, V_A2) from at least one DC input voltage (V_E), wherein the DC output voltages (V_A1, V_A2) are smaller than the DC input voltage (V_E), the circuit arrangement comprising voltage regulating means (3, 4; 13, 14) for generating the DC output voltages (V_A1, V_A2), and wherein the DC input voltage (V_E) is applied to a DC/DC converter (2; 12) which can be switched on or off by a control means (5; 15) and supplies a lower voltage than the DC input voltage (V_E) to the voltage regulating means.

Claims

1. A circuit arrangement for vehicles for generating at least two DC output voltages from at least one DC input voltage, wherein the DC output voltages are smaller than the DC input voltage, the circuit arrangement comprising voltage regulating means for generating the DC output voltages, and wherein the DC input voltage is applied to a DC/DC converter which can be switched on or off by a control means and supplies a lower voltage than the DC input voltage to the voltage regulating means.

2. A circuit arrangement as claimed in claim 1, characterized in that the DC input voltage is used for energy supply of the arrangement.

3. A circuit arrangement as claimed in claim 1, characterized in that, with the exception of the DC/DC converter, the circuit arrangement is realized on an integrated circuit which is preceded by the DC/DC converter.

4. A circuit arrangement as claimed in claim 1, characterized in that the circuit arrangement is realized together with the DC/DC converter on an integrated circuit.

6. A circuit arrangement as claimed in claim 1, characterized in that the DC input voltage has a value of approximately 42 volts and the voltage supplied by the DC/DC converter has a value of approximately 12 volts.

5. An integrated circuit for vehicles for generating DC output voltages from at least one DC input voltage, wherein the DC output voltages are smaller than the DC input voltage, the integrated circuit comprising voltage regulating means for generating the DC output voltages, and wherein the circuit comprises a control means which generates a switching signal provided for switching external circuits on or off.