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1. 发明授权

US10447152B2 Driving charge pump circuits 有权
公开(公告)号：US10447152B2
公开(公告)日：2019-10-15
申请号：US15465504
申请日：2017-03-21
申请人： Linear Technology Corporation
发明人： Xu Zhang , Jian Li , San Hwa Chee
IPC分类号： H02M1/08 , H02M3/07 , H02M1/36
摘要： A method and system of driving a switched capacitor converter having a plurality of switches. A first driver coupled to a first switch is powered by providing a first reference voltage level VCC to a first supply and a GND reference to a second supply node of the first driver. A second driver coupled to a second switch is powered by providing a unidirectional path between the first supply node of a first driver and the first supply node of the second driver and by keeping OFF the second switch while turning ON the first switch. A third driver coupled to a third switch is powered by providing a unidirectional path between the first supply node of a second driver and the first supply node of the third driver and by keeping OFF the first and third switch while turning ON the second switch.

2. 发明授权

US10084381B2 DCR inductor current-sensing in four-switch buck-boost converters 有权
公开(公告)号：US10084381B2
公开(公告)日：2018-09-25
申请号：US15654568
申请日：2017-07-19
申请人： Linear Technology Corporation
发明人： Xu Zhang , Jian Li , Zhouyuan Shi , Yi Ding Gu
IPC分类号： G06F1/00 , H02M3/158 , H02M1/00
CPC分类号： H02M3/1582 , H02M2001/0009
摘要： An inductor current-sensing circuit for measuring a current in an inductor includes (a) a first RC network coupled between a first terminal of the inductor and a reference voltage source; and (b) a second RC network coupled between a second terminal of the inductor and the reference voltage source. The first RC network and the second RC network each have a time constant substantially equal to the ratio between the inductance and the DC resistance of the inductor. The inductor which current is being measured may be a primary inductor of a four-switch buck boost converter receiving an input voltage and providing an output voltage.

3. 发明授权

US10050559B2 Control architecture with improved transient response 有权
公开(公告)号：US10050559B2
公开(公告)日：2018-08-14
申请号：US15199693
申请日：2016-06-30
申请人： LINEAR TECHNOLOGY CORPORATION
发明人： Jian Li , Jindong Zhang
IPC分类号： H02M3/158 , H02M7/537 , H02M1/12 , H02M1/00 , H02M3/156
摘要： A power interface device includes a main switching converter, an auxiliary switching converter, a feedback sense circuit, an error amplifier, a high pass filter, a transient detection circuit, and an auxiliary control circuit. The transient detection circuit is configured to receive the higher frequency component of the transient signal and output an enable signal when the higher frequency component of the transient signal falls outside of an operating window range defined by a first threshold and a second threshold and output a disable signal when the higher frequency component of the transient signal stays within the operating window range. The auxiliary control circuit configured to activate the auxiliary switching converter in accordance with the enable signal and to deactivate the auxiliary switching converter in accordance with the disable signal.

4. 发明授权

US10013003B2 Feed forward current mode switching regulator with improved transient response 有权
公开(公告)号：US10013003B2
公开(公告)日：2018-07-03
申请号：US13764045
申请日：2013-02-11
申请人： Linear Technology Corporation
发明人： Gregory Manlove , Yi Ding Gu , Jian Li
IPC分类号： H02M3/156 , G05F1/10
CPC分类号： G05F1/10 , G05F1/562 , H02M1/32 , H02M3/142 , H02M3/156 , H02M3/158 , H02M2001/0019 , H02M2001/0025
摘要： A switching regulator circuit incorporates an offset circuit, connected in a control loop of the regulator circuit, that, in response to a signal indicating an imminent load current step, adjusts a duty cycle of a power switch for the current step prior to the regulator circuit responding to a change in output voltage due to the current step. In one embodiment, a load controller issues a digital signal shortly before a load current step. The digital signal is decoded and converted to an analog offset signal in a feedback control loop of the regulator to immediately adjust a duty cycle of the switch irrespective of the output voltage level. By proper timing of the offset, output voltage ripple is greatly reduced. The current offset may also be used to rapidly change the output voltage in response to an external signal requesting a voltage step.

5. 发明申请

US20170324331A1 DCR Inductor Current-Sensing in Four-switch Buck-Boost Converters 审中-公开
公开(公告)号：US20170324331A1
公开(公告)日：2017-11-09
申请号：US15654568
申请日：2017-07-19
申请人： Linear Technology Corporation
发明人： Xu Zhang , Jian Li , Zhouyuan Shi , Yi Ding Gu
IPC分类号： H02M3/158 , H02M1/00
CPC分类号： H02M3/1582 , H02M2001/0009
摘要： An inductor current-sensing circuit for measuring a current in an inductor includes (a) a first RC network coupled between a first terminal of the inductor and a reference voltage source; and (b) a second RC network coupled between a second terminal of the inductor and the reference voltage source. The first RC network and the second RC network each have a time constant substantially equal to the ratio between the inductance and the DC resistance of the inductor. The inductor which current is being measured may be a primary inductor of a four-switch buck boost converter receiving an input voltage and providing an output voltage.

6. 发明授权

US09748843B2 DCR inductor current-sensing in four-switch buck-boost converters 有权
公开(公告)号：US09748843B2
公开(公告)日：2017-08-29
申请号：US14677794
申请日：2015-04-02
申请人： Linear Technology Corporation
发明人： Xu Zhang , Jian Li , Zhouyuan Shi , Yi Ding Gu
IPC分类号： G05F1/24 , H02M3/158 , H02M1/00
CPC分类号： H02M3/1582 , H02M2001/0009
摘要： An inductor current-sensing circuit for measuring a current in an inductor includes (a) a first RC network coupled between a first terminal of the inductor and a reference voltage source; and (b) a second RC network coupled between a second terminal of the inductor and the reference voltage source. The first RC network and the second RC network each have a time constant substantially equal to the ratio between the inductance and the DC resistance of the inductor. The inductor which current is being measured may be a primary inductor of a four-switch buck boost converter receiving an input voltage and providing an output voltage.

7. 发明申请

US20140139198A1 FEED FORWARD CURRENT MODE SWITCHING REGULATOR WITH IMPROVED TRANSIENT RESPONSE 有权
标题翻译：进给正向电流模式开关稳压器具有改进的瞬态响应
公开(公告)号：US20140139198A1
公开(公告)日：2014-05-22
申请号：US13764045
申请日：2013-02-11
申请人： LINEAR TECHNOLOGY CORPORATION
发明人： Gregory Manlove , Yi Ding Gu , Jian Li
IPC分类号： G05F1/10
CPC分类号： G05F1/10 , G05F1/562 , H02M1/32 , H02M3/142 , H02M3/156 , H02M3/158 , H02M2001/0019 , H02M2001/0025
摘要： A switching regulator circuit incorporates an offset circuit, connected in a control loop of the regulator circuit, that, in response to a signal indicating an imminent load current step, adjusts a duty cycle of a power switch for the current step prior to the regulator circuit responding to a change in output voltage due to the current step. In one embodiment, a load controller issues a digital signal shortly before a load current step. The digital signal is decoded and converted to an analog offset signal in a feedback control loop of the regulator to immediately adjust a duty cycle of the switch irrespective of the output voltage level. By proper timing of the offset, output voltage ripple is greatly reduced. The current offset may also be used to rapidly change the output voltage in response to an external signal requesting a voltage step.
摘要翻译：开关稳压器电路包括连接在调节器电路的控制回路中的偏移电路，响应于指示迫在眉睫的负载电流步长的信号，调节调节器电路之前的当前步骤的功率开关的占空比响应于由于当前步骤而导致的输出电压的变化。在一个实施例中，负载控制器在负载电流步长之前不久就发出数字信号。数字信号被解码并转换成调节器的反馈控制环路中的模拟偏移信号，以立即调节开关的占空比，而与输出电压电平无关。通过适当的偏移定时，输出电压纹波大大降低。电流偏移也可以用于响应于请求电压阶跃的外部信号快速地改变输出电压。

8. 发明授权

US10468978B2 Balancing techniques and circuits for charge pumps 有权
公开(公告)号：US10468978B2
公开(公告)日：2019-11-05
申请号：US15465487
申请日：2017-03-21
申请人： Linear Technology Corporation
发明人： Xu Zhang , Jian Li , San Hwa Chee
IPC分类号： H02M3/07 , H02M1/36 , H02M1/08
摘要： Methods and systems of pre-balancing a switched capacitor converter are provided. A first comparator includes a positive input configured to receive a voltage across an output capacitor and a negative input configured to receive a first hysteresis voltage. A second comparator includes a positive input configured to receive a voltage across an input capacitor of the switched capacitor converter and a negative input configured to receive a second hysteresis voltage. A first current source is coupled between the output capacitor and GND and is configured to discharge the output capacitor upon determining that the voltage across the output capacitor is above a tolerance provided by the first hysteresis voltage. A second current source is coupled between the input capacitor and GND and is configured to discharge the input capacitor upon determining that the voltage across the input capacitor is above a tolerance provided by the second hysteresis voltage.

9. 发明申请

US20180019666A1 Driving Charge Pump Circuits 审中-公开
公开(公告)号：US20180019666A1
公开(公告)日：2018-01-18
申请号：US15465504
申请日：2017-03-21
申请人： Linear Technology Corporation
发明人： Xu Zhang , Jian Li , San Hwa Chee
IPC分类号： H02M3/07 , H02M1/08
CPC分类号： H02M3/07 , H02M1/08 , H02M1/36 , H02M3/073 , H02M2003/072
摘要： A method and system of driving a switched capacitor converter having a plurality of switches. A first driver coupled to a first switch is powered by providing a first reference voltage level VCC to a first supply and a GND reference to a second supply node of the first driver. A second driver coupled to a second switch is powered by providing a unidirectional path between the first supply node of a first driver and the first supply node of the second driver and by keeping OFF the second switch while turning ON the first switch. A third driver coupled to a third switch is powered by providing a unidirectional path between the first supply node of a second driver and the first supply node of the third driver and by keeping OFF the first and third switch while turning ON the second switch.

10. 发明申请

US20180019665A1 BALANCING CHARGE PUMP CIRCUITS 有权
公开(公告)号：US20180019665A1
公开(公告)日：2018-01-18
申请号：US15465339
申请日：2017-03-21
申请人： Linear Technology Corporation
发明人： Xu Zhang , Jian Li , San Hwa Chee
IPC分类号： H02M3/07
CPC分类号： H02M3/07 , H02M1/08 , H02M1/36 , H02M3/073 , H02M2003/072
摘要： Methods and systems of controlling a switched capacitor converter are provided. Upon determining that a voltage across a flying capacitor is above a first threshold, a first current is drawn from a first terminal of the flying capacitor by a first current source, and a second current is provided to a second terminal of the flying capacitor by a second current source. Upon determining that the voltage across the flying capacitor is below a second threshold, the first current is provided to the first terminal of the flying capacitor by the first current source, and the second current is drawn from the second terminal of the flying capacitor by the second current source. Upon determining that the voltage across the flying capacitor is above the second threshold and below the first threshold from the reference voltage, the first and second current sources are turned OFF.

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