公开(公告)号：US11355951B2

公开(公告)日：2022-06-07

申请号：US16785700

申请日：2020-02-10

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Tzu-Yang Yen ,  Chih-Yuan Chen

IPC: H02J7/34 ,  H02J7/00 ,  H02M3/07

Abstract: A power failure prevention system includes a switch circuit, an energy storage circuit, a voltage detector circuit and a control circuit. The switch circuit includes a first switch, a second switch, a third switch and a fourth switch. The energy storage circuit is connected to the switch circuit. The voltage detector circuit detects an input voltage provided by an input voltage source and a stored voltage of the energy storage circuit. The control circuit controls the switch circuit according to the detected input voltage and stored voltage. When the input voltage is higher than a first threshold, the switch circuit allows the input voltage to charge the energy storage circuit. When the input voltage is lower than a second threshold, the switch circuit allows the stored voltage to discharge to the input voltage source. The first threshold is higher than the second threshold.

公开(公告)号：US10454461B1

公开(公告)日：2019-10-22

申请号：US16103966

申请日：2018-08-16

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Tzu-Yang Yen ,  Chih-Yuan Chen

IPC: H03K5/00 ,  H03K3/037 ,  H03K5/24 ,  H02M1/08 ,  H03K19/20

Abstract: A frequency compensation circuit includes a compensation circuit and a calculation circuit. The compensation circuit controls the calculation circuit to generate a ramp voltage when the voltage at a node between an upper-side switch and a lower-side switch of the DC voltage converter is larger than an input voltage of the DC voltage converter. The calculation circuit generates a control signal at low level when the ramp voltage is smaller than the output voltage of the DC voltage converter so that the frequency compensation circuit generates the constant on-time signal at high level. The calculation generates the control signal at high level when the ramp voltage is larger than or equal to the output voltage of the DC voltage converter so that the frequency compensation circuit generates the constant on-time signal at low level.

公开(公告)号：US09564809B2

公开(公告)日：2017-02-07

申请号：US14842813

申请日：2015-09-01

Applicant: Anpec Electronics Corporation

Inventor： Chih-Yuan Chen ,  Tzu-Yang Yen

IPC: H02M5/293 ,  H02M3/158

CPC classification number: H02M3/158 ,  H02M3/1588 ,  H02M2001/0009 ,  Y02B70/1466

Abstract: A zero current detecting circuit is disclosed. The zero current detecting circuit includes a first zero current comparator for determining current variation on an inductor of a synchronous switching power converter so as to output a zero current signal to turn off a down-bridge transistor of the synchronous power converter; a second zero current comparator for determining whether the first zero current comparator turns off the down-bridge transistor too early or too late and outputting a comparison result; a counter coupled to the second zero current comparator for ascending or descending a control bit according to the comparison result, and an adjustable delay unit coupled to the first zero current comparator and the counter for adjusting a delay time according to the control bit, and delaying and outputting the zero current signal according to the delay time, to compensate a negative offset voltage by delay.

Abstract translation: 公开了零电流检测电路。 零电流检测电路包括：第一零电流比较器，用于确定同步开关功率转换器的电感器上的电流变化，以输出零电流信号，以关断同步功率转换器的下桥晶体管; 第二零电流比较器，用于确定所述第一零电流比较器是否太早或太晚关闭所述下桥三极管，并输出比较结果; 耦合到第二零电流比较器的计数器，用于根据比较结果上升或下降控制位;以及可调延迟单元，耦合到第一零电流比较器和计数器，用于根据控制位调整延迟时间，并延迟 并根据延迟时间输出零电流信号，以补偿负偏移电压的延迟。

公开(公告)号：US08896283B2

公开(公告)日：2014-11-25

申请号：US14151824

申请日：2014-01-10

Applicant: Anpec Electronics Corporation

Inventor： Chih-Yuan Chen ,  Tzu-Yang Yen

IPC: H02M3/156 ,  H02M3/158 ,  H02M3/157 ,  H02M1/00

CPC classification number: H02M3/1588 ,  H02M3/156 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: The synchronous switching power converter comprises an inductor; a down bridge transistor; and a zero current detection circuit comprising a zero current comparator for receiving a fixed comparing level at a negative input end for comparison to change state of a comparing result; a delay unit, for delaying the comparing result to change state of a turn off signal according to a compensation voltage, to turn off the down bridge transistor when determining current on the inductor is zero; a transient state adjusting circuit for indicating a transient period when detecting state of the turn off signal is changed; and an integrator for integrating the compensation voltage by analog manner to adjust value of the compensation voltage and providing to the delay unit within the transient period; wherein the zero current comparator determines the integrator to integrate positively or negatively within the transient period.

Abstract translation: 同步开关电源转换器包括电感器; 下桥式晶体管; 以及零电流检测电路，其包括用于在负输入端接收固定比较电平的零电流比较器，用于与比较结果的改变状态进行比较; 延迟单元，用于根据补偿电压将比较结果延迟关闭信号的状态，当确定电感上的电流为零时关断下桥式晶体管; 用于在检测到关闭信号的状态时指示瞬时周期的瞬态状态调整电路被改变; 以及积分器，用于通过模拟方式对补偿电压进行积分，以调整补偿电压的值并在瞬态期间提供给延迟单元; 其中零电流比较器确定积分器在过渡期内积极或负向积分。

公开(公告)号：US09847720B2

公开(公告)日：2017-12-19

申请号：US14953389

申请日：2015-11-29

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Chih-Yuan Chen ,  Tzu-Yang Yen

IPC: H02M3/158 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M3/1582 ,  H02M2001/0009 ,  H02M2001/0032 ,  Y02B70/16

Abstract: Provided herein are a single-inductor dual-output (SIDO) power converter operable in a discontinuous conduction mode and a control method thereof. The SIDO power converter is operable to switch between a boost mode and a buck-boost mode. The SIDO power converter dynamically adjusts output timings of clock signals with respect to the loads according to a load difference therebetween to lower the power consumption with a light load when the inductor current is zero to achieve optimal power distribution.

公开(公告)号：US09543826B2

公开(公告)日：2017-01-10

申请号：US14929678

申请日：2015-11-02

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Chih-Yuan Chen ,  Tzu-Yang Yen

IPC: H02J1/02 ,  H02M3/158 ,  H02M1/44 ,  H02M3/156

CPC classification number: H02M1/44 ,  H02M3/156 ,  H02M3/158 ,  H02M3/1588 ,  Y02B70/1466

Abstract: An audible noise avoiding circuit and a DC-DC boost converter for a DC-DC boost converter are provided. The audible noise avoiding circuit comprises a timing controller and a linear regulator. The timing controller discharges a timing capacitor to a low voltage according to switching of the DC-DC boost converter. A sink output stage of the liner regulator is coupled to the output voltage node. When the voltage of the timing capacitor is higher than a threshold voltage, the compensation unit compensates the output of the operational amplifier for gradually turning on the sink output stage in order to gradually reduce the voltage of the output voltage node. A predetermined charging time interval is defined by the time interval of charging the timing capacitor from the low voltage to the threshold voltage, the reciprocal of the predetermined time interval is a frequency in the ultrasonic wave frequency range.

Abstract translation: 提供用于DC-DC升压转换器的可听噪声避免电路和DC-DC升压转换器。 可听噪声避免电路包括定时控制器和线性调节器。 定时控制器根据DC-DC升压转换器的切换将定时电容器放电到低电压。 线性调节器的接收器输出级耦合到输出电压节点。 当定时电容器的电压高于阈值电压时，补偿单元补偿运算放大器的输出，逐渐打开吸收器输出级，以逐渐降低输出电压节点的电压。 预定充电时间间隔由定时电容器从低电压充电到阈值电压的时间间隔来定义，预定时间间隔的倒数是超声波频率范围内的频率。

公开(公告)号：US10727750B1

公开(公告)日：2020-07-28

申请号：US16589737

申请日：2019-10-01

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Hsin-Tai Lin ,  Tzu-Yang Yen

IPC: H02M3/158 ,  H02M3/156

Abstract: A system and a method for improving continuous load transition of a DC-DC converter are provided. The system includes a conduction detector circuit, a counter circuit, a depth control circuit and a slope generator. The conduction detector circuit detects a phase signal of the DC-DC converter to generate a pulse signal. The counter circuit counts the number of pulse waves of the pulse signal to output a counting signal. The depth control circuit generates a pulled-down depth signal. The slope generator generates a slope signal according to the pulled-down depth signal. The pulled-down depth signal is pulled down by a first depth each time the switch circuit is conducted, but when the number of times that the switching circuit is conducted reaches a conduction number threshold, the pulled-down depth signal is pulled down by a second depth that is larger than the first depth.

公开(公告)号：US09651959B2

公开(公告)日：2017-05-16

申请号：US14922059

申请日：2015-10-23

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Chih-Yuan Chen ,  Tzu-Yang Yen

IPC: H02M1/00 ,  H02M3/156 ,  G05F1/569 ,  G05F1/577 ,  G05F1/56

CPC classification number: G05F1/56 ,  G05F1/569 ,  G05F1/577 ,  H02M3/156 ,  H02M3/158 ,  H02M2001/008 ,  H02M2001/009

Abstract: The present disclosure illustrates a single-inductor dual-output (SIDO) power converter for hysteresis current control mode and a control method thereof. In the SIDO power converter provided by the instant disclosure, a detecting circuit, connected to the upper bridge transistor, determines whether the inductive current reaches the upper limit threshold or the lower limit threshold, and further drives a control circuit to turn on or off the corresponding upper bridge transistor and/or the lower bridge transistor, so as to simplify the operation of the hysteresis current control mode.

公开(公告)号：US20140111168A1

公开(公告)日：2014-04-24

申请号：US14151824

申请日：2014-01-10

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Chih-Yuan Chen ,  Tzu-Yang Yen

IPC: H02M3/158

CPC classification number: H02M3/1588 ,  H02M3/156 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: The synchronous switching power converter comprises an inductor; a down bridge transistor; and a zero current detection circuit comprising a zero current comparator for receiving a fixed comparing level at a negative input end for comparison to change state of a comparing result; a delay unit, for delaying the comparing result to change state of a turn off signal according to a compensation voltage, to turn off the down bridge transistor when determining current on the inductor is zero; a transient state adjusting circuit for indicating a transient period when detecting state of the turn off signal is changed; and an integrator for integrating the compensation voltage by analog manner to adjust value of the compensation voltage and providing to the delay unit within the transient period; wherein the zero current comparator determines the integrator to integrate positively or negatively within the transient period.

Abstract translation: 同步开关电源转换器包括电感器; 下桥式晶体管; 以及零电流检测电路，其包括用于在负输入端接收固定比较电平的零电流比较器，用于与比较结果的改变状态进行比较; 延迟单元，用于根据补偿电压将比较结果延迟关闭信号的状态，当确定电感上的电流为零时关断下桥式晶体管; 用于在检测到关闭信号的状态时指示瞬时周期的瞬态状态调整电路被改变; 以及积分器，用于通过模拟方式对补偿电压进行积分，以调整补偿电压的值并在瞬态期间提供给延迟单元; 其中零电流比较器确定积分器在过渡期内积极或负向积分。

公开(公告)号：US11552545B2

公开(公告)日：2023-01-10

申请号：US17389353

申请日：2021-07-30

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Hsin-Tai Lin ,  Tzu-Yang Yen

IPC: H02M3/158 ,  H02M1/00

Abstract: A power converter with a negative current detection mechanism is provided. A negative current detecting circuit includes a first operational amplifier, a first transistor and a second transistor. A non-inverting input terminal of the first operational amplifier is connected to a second terminal of a sense resistor. An inverting input terminal of the first operational amplifier is connected to a first terminal of a first capacitor. Control terminals of the first and second transistors are connected to an output terminal of the first operational amplifier. A first terminal of the first transistor is connected to the second terminal of the sense resistor. A second terminal of the first transistor is grounded. A first terminal of the second transistor is connected to the inverting input terminal of the first operational amplifier and the first terminal of the first transistor. A second terminal of the second transistor is grounded.