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1. 发明专利

JP5125066B2 Synchronous rectification type dc-dc converter of the control circuit, a synchronous rectification type dc-dc converter and a control method thereof 有权
公开(公告)号：JP5125066B2
公开(公告)日：2013-01-23
申请号：JP2006305621
申请日：2006-11-10
申请人：富士通セミコンダクター株式会社
发明人：守仁長谷川 , 敬史松本 , 竜太永井
IPC分类号： H02M3/155 , H02M7/21
CPC分类号： H02M3/1588 , Y02B70/1466

2. 发明专利

JP5082908B2 The power supply circuit and the overcurrent protection circuit and electronic equipment, 有权
公开(公告)号：JP5082908B2
公开(公告)日：2012-11-28
申请号：JP2008031330
申请日：2008-02-13
申请人：富士通セミコンダクター株式会社
发明人：守仁長谷川 , 秀信伊藤 , 國輝許 , 稔彦笠井 , 克之安河内
IPC分类号： G05F1/56
CPC分类号： G05F1/573 , H03K17/0822

3. 发明专利

JP5029156B2 Dc-dc converter and its control method 有权
公开(公告)号：JP5029156B2
公开(公告)日：2012-09-19
申请号：JP2007154469
申请日：2007-06-11
申请人：富士通セミコンダクター株式会社
发明人：敬史松本 , 竜太永井 , 省二田尻 , 守仁長谷川
IPC分类号： H02M3/155 , H02M7/21
CPC分类号： H02M3/1588 , Y02B70/1466

4. 发明专利

JP4967526B2 Control circuit of the power supply, power supply and control method thereof 有权
公开(公告)号：JP4967526B2
公开(公告)日：2012-07-04
申请号：JP2006225074
申请日：2006-08-22
申请人：富士通セミコンダクター株式会社
发明人：秀清小澤 , 守仁長谷川
IPC分类号： H02M3/155 , G05F1/66
CPC分类号： H02M3/1588 , H02J7/0065 , H02J7/0068 , Y02B40/90 , Y02B70/1466 , Y10S323/906

5. 发明专利

JP4823003B2 Control circuit of synchronous rectification type power supply, synchronous rectification type power supply apparatus and a method of controlling the same 有权
公开(公告)号：JP4823003B2
公开(公告)日：2011-11-24
申请号：JP2006263987
申请日：2006-09-28
申请人：富士通セミコンダクター株式会社
发明人：秀清小澤 , 守仁長谷川
IPC分类号： H02M3/155
CPC分类号： H02M3/1588 , Y02B70/1466

6. 发明专利

JP5304173B2 The power supply voltage control circuit and a dc-dc converter 有权
公开(公告)号：JP5304173B2
公开(公告)日：2013-10-02
申请号：JP2008275942
申请日：2008-10-27
申请人：富士通セミコンダクター株式会社
发明人：守仁長谷川
IPC分类号： H02M3/155
摘要： PROBLEM TO BE SOLVED: To provide a supply voltage control circuit, which operates in a current continuous mode in a full load area while controlling a back flow of a coil current, and also to provide a method of controlling a supply voltage and a DC-DC converter. SOLUTION: The circuit is provided with: a first comparator 11 to compare a first reference voltage Vr1 to set the off-timing of a main side transistor Q1 with a divided voltage V1 of an output voltage Vo; and a second comparator 12 to compare a second reference voltage Vr2 to set the on-timing of the main side transistor Q1 with the divided voltage V1. The circuit is provided with an RS-FF circuit 13 to on-off-control the main side transistor Q1 and a synchronous side transistor Q2 complementarily according to output signals S1 and S2 from the first and second comparators 11 and 12. The supply voltage control circuit is provided with a current detecting circuit 14 to generate a control signal SC1 according to a first current IL1 running to the synchronous side transistor Q2, so that as the first current IL1 approaches zero, a voltage value of the second reference voltage Vr2 is raised. COPYRIGHT: (C)2010,JPO&INPIT

7. 发明专利

JP5211523B2 Dc-dc converter, power supply method, and a power supply system 有权
公开(公告)号：JP5211523B2
公开(公告)日：2013-06-12
申请号：JP2007082596
申请日：2007-03-27
申请人：富士通セミコンダクター株式会社
发明人：守仁長谷川
IPC分类号： H02M3/155
CPC分类号： H02M1/36 , H02M3/156 , Y10S323/901

8. 发明专利

JP5076536B2 DC - DC converter circuit, DC - DC converter control circuit and a DC - DC conversion control method 有权
公开(公告)号：JP5076536B2
公开(公告)日：2012-11-21
申请号：JP2007035988
申请日：2007-02-16
申请人：富士通セミコンダクター株式会社
发明人：守仁長谷川 , 秀清小澤
IPC分类号： H02M3/155
CPC分类号： H02M1/36 , H02M1/32 , H02M3/156 , Y10S323/901

9. 发明专利

JP4640985B2 Dc-dc converter of the control circuit and control method 有权
公开(公告)号：JP4640985B2
公开(公告)日：2011-03-02
申请号：JP2005367132
申请日：2005-12-20
申请人：富士通セミコンダクター株式会社
发明人：守仁長谷川
IPC分类号： H02M3/155
CPC分类号： H02M3/158 , H02M2001/008 , Y10T307/406 , Y10T307/469

10. 发明专利

JP5261919B2 Dc-dc converter and the dc-dc converter of the control circuit 有权
公开(公告)号：JP5261919B2
公开(公告)日：2013-08-14
申请号：JP2006305451
申请日：2006-11-10
申请人：富士通セミコンダクター株式会社
发明人：守仁長谷川 , 敬史松本 , 竜太永井
IPC分类号： H02M3/155
CPC分类号： H02M3/1588 , H02M2001/0032 , Y02B70/1466 , Y02B70/16
摘要： A DC-DC converter reducing reverse current and maintaining high conversion efficiency under a light load. The DC-DC converter perform pulse width modulation (PWM) or pulse frequency modulation (PFM) and includes a drive control circuit generating a first drive signal and a second drive signal activating and inactivating a first transistor and a second transistor in a complementary manner. A reversed flow detection circuit detects current flowing to the second transistor and generates a detection signal controlling activation and inactivation of the second transistor. A detection signal invalidation circuit, coupled to the reversed flow detection circuit and the drive control circuit, receiving an operation switch signal and invalidating the detection signal in response to the operation switch signal during at least a certain period of the PWM.

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