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：US09966852B1

公开(公告)日：2018-05-08

申请号：US15475949

申请日：2017-03-31

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Fu-Chuan Chen ,  Chih-Yuan Chen

IPC: H02M3/158 ,  H02J7/00

CPC classification number: H02M3/1582 ,  H02J7/0052 ,  H02M3/158 ,  H02M3/1588 ,  H02M2001/009

Abstract: A dual voltage output device includes a charging circuit and a control circuit. The charging circuit includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, an inductor, a first capacitor and a second capacitor. The control circuit controls the first switch, the second switch, the third switch, the fourth switch, the fifth switch and the sixth switch so that a DC voltage source charges the inductor and the inductor charges the first capacitor and the second capacitor individually or together. Therefore, the capacitor provides a first voltage, and the second capacitor provides a second voltage.

公开(公告)号：US09800131B1

公开(公告)日：2017-10-24

申请号：US15231920

申请日：2016-08-09

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Chih-Yuan Chen

IPC: H02M3/158 ,  G05F1/44 ,  H02M1/084

CPC classification number: H02M1/084 ,  H02M3/158 ,  H02M3/1584 ,  H02M2003/1586

Abstract: Provided herein is a phase controller for a multi-phase voltage converter. The phase controller includes a plurality of logic control circuits, a phase selection circuit and a plurality of signal generators. The logic control circuits receive a plurality of phase-change signals and output a plurality of logic signals, respectively. The signal generators provide a plurality of bridge circuits with a plurality of phase selection signals to drive the bridge circuits. The phase selection circuit controls the signal generators according to the logic signals and a voltage determination signal. When the voltage determination signal stays at a high logic level for a pre-determined time period, the phase selection circuit controls the signal generators to output a plurality of phase selection signals at a high logic level to the bridge circuits such that the corresponding bridge circuits provide power at the same time.

公开(公告)号：US09634565B2

公开(公告)日：2017-04-25

申请号：US14085758

申请日：2013-11-20

Applicant: Anpec Electronics Corporation

Inventor： Chih-Yuan Chen ,  Hsin-Tai Lin

IPC: H02M3/156 ,  H02M3/158 ,  H02M1/44 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M1/44 ,  H02M3/156 ,  H02M2001/008 ,  H02M2003/1586

Abstract: A modulation method, for a voltage converting device, includes generating a first modulation signal according to an input voltage and a first output voltage; generating a second modulation signal according to the input voltage and a second output voltage; adjusting the first modulation signal and the second modulation signal according to a clock signal for making a first starting time of the first modulation signal be different from a second starting time of the second modulation signal; and generating the first output voltage and the second output voltage according to the input voltage, the first modulation signal and the second modulation signal.

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：US09110482B2

公开(公告)日：2015-08-18

申请号：US13892325

申请日：2013-05-13

Applicant: Anpec Electronics Corporation

Inventor： Yueh-Lung Kuo ,  Chih-Yuan Chen

IPC: G05F1/40 ,  G05F3/08

CPC classification number: G05F3/08 ,  H02M3/1563 ,  H02M2001/0003 ,  H02M2001/0025 ,  Y02B70/126

Abstract: A control method for preventing an output voltage of a buck switching regulator from falling when an input voltage of the buck switching regulator falls includes: converting the input voltage into a charging current; determining a duty cycle of the buck switching regulator according to the charging current and the output voltage; and adjusting a switching frequency of a pulse width modulation signal in the buck switching regulator when the input voltage falls to a specific voltage and an off time of the pulse width modulation signal reaches a minimum value, in order to change the duty cycle to prevent the output voltage from falling.

Abstract translation: 一种用于在降压开关调节器的输入电压降低时防止降压开关调节器的输出电压下降的控制方法包括：将输入电压转换为充电电流; 根据充电电流和输出电压确定降压开关调节器的占空比; 并且当输入电压下降到特定电压并且脉冲宽度调制信号的关断时间达到最小值时，调整降压开关调节器中的脉冲宽度调制信号的开关频率，以便改变占空比以防止 输出电压下降。

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：US12253409B2

公开(公告)日：2025-03-18

申请号：US17950217

申请日：2022-09-22

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Yu-Yu Chen ,  Jia-Hua Hong ,  Chih-Yuan Chen

IPC: G01J1/16 ,  G01J1/42 ,  G01J1/08

Abstract: A light sensing method having a sensing order adjusting mechanism is provided. The method includes steps of: in a previous sensing cycle, sensing a first light signal that is emitted by both of an ambient light source and a light-emitting component and then is reflected by a tested object; in the previous sensing cycle, sensing a second light signal that is emitted by both of the ambient light source and the light-emitting component and then is reflected by the tested object; in the previous sensing cycle, sensing an ambient light signal emitted by only the ambient light source; and in a next sensing cycle, sensing the first light signal, the second light signal and the ambient light signal in an order different from that in the previous sensing cycle.

公开(公告)号：US11770074B2

公开(公告)日：2023-09-26

申请号：US17401806

申请日：2021-08-13

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Chih-Yuan Chen ,  Ping-Yu Tsai

IPC: H02M3/158 ,  H02M1/088

CPC classification number: H02M3/1584 ,  H02M1/088

Abstract: A multiphase power converter having a daisy chain control circuit and a method for controlling the same are provided. A main control circuit outputs an initial pulse width modulation signal having a plurality of initial pulses. One of a plurality of slave control circuits is connected to an output terminal of the main control circuit, and outputs a pulse width modulation signal according to the received initial pulse width modulation signal. Each of the rest of the plurality of slave control circuits outputs the next pulse width modulation signal to the next slave control circuit or the main control circuit according to the pulse width modulation signal received from the previous slave control circuit. The main control circuit automatically counts a quantity of the control circuits according to the received pulse width modulation signal and outputted initial pulse width modulation signal.

公开(公告)号：US11743982B1

公开(公告)日：2023-08-29

申请号：US17953418

申请日：2022-09-27

Applicant: ANPEC ELECTRONICS CORPORATION

Inventor： Jia-Hua Hong ,  Chih-Yuan Chen

IPC: H01S5/068 ,  G01S7/483 ,  H05B45/12 ,  H05B45/34 ,  H05B45/345

CPC classification number: H05B45/12 ,  H05B45/34 ,  H05B45/345

Abstract: A light sensor having a control complexity reducing mechanism is provided. When light is emitted to a photodiode by both of an ambient light source and a light-emitting component, a first coarse count value is counted by a counter and then is sampled and held by a first sample and hold circuit. When light is emitted to the photodiode by only the ambient light source, a second coarse count value is counted by the counter and then is sampled and held by a second sample and hold circuit. After the coarse count values are held, the counter performs a fine counting operation on light intensity of the light emitted by both of the ambient light source and the light-emitting component to generate a first fine count value, and on light intensity of the light emitted by only the ambient light source to generate a second fine count value.