DC/DC CONVERTER AND CONTROL CIRCUIT THEREOF, CONTROL METHOD, AND ON-VEHICLE ELECTRICAL APPARATUS

PROBLEM TO BE SOLVED: To detect steady overcurrent state reliably.SOLUTION: A pulse modulator 210 generates a pulse signal Shaving a duty ratio adjusted so that the output signal Vof a DC/DC converter 100 approaches a target voltage V. When the current Iof the DC/DC converter 100 exceeds a prescribe...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	WATANABE YUKIHIRO, ENOMOTO YU
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To detect steady overcurrent state reliably.SOLUTION: A pulse modulator 210 generates a pulse signal Shaving a duty ratio adjusted so that the output signal Vof a DC/DC converter 100 approaches a target voltage V. When the current Iof the DC/DC converter 100 exceeds a prescribed threshold level I, an overcurrent detection circuit 271 asserts an overcurrent detection signal S. When assert of an overcurrent detection signal Soccurs more than a prescribed determination frequency in a prescribed number of cycles, a determination circuit 290 determines that it is over current state.SELECTED DRAWING: Figure 3 【課題】定常的な過電流状態を確実に検出する。【解決手段】パルス変調器２１０は、ＤＣ／ＤＣコンバータ１００の出力信号ＶＯＵＴが目標電圧ＶＲＥＦに近づくようにデューティ比が調節されるパルス信号ＳＰＷＭを生成する。過電流検出回路２７１は、ＤＣ／ＤＣコンバータ１００の電流ＩＭ１が所定のしきい値ＩＯＣＰを超えると、過電流検出信号ＳＯＣＰをアサートする。判定回路２９０は、過電流検出信号ＳＯＣＰのアサートが、所定サイクル数内に所定の判定回数を超えて発生すると、過電流状態と判定する。【選択図】図３