公开(公告)号：US5698963A

公开(公告)日：1997-12-16

申请号：US635671

申请日：1996-04-22

申请人： Hwan-Ho Seong ,  Sang-Tae Im

发明人： Hwan-Ho Seong ,  Sang-Tae Im

IPC分类号： G01R31/36 ,  H01M10/44 ,  H01M10/46 ,  H02J7/00 ,  H02J7/04 ,  H02J7/10

CPC分类号： H02J7/0093 ,  H01M10/46

摘要： A battery charging circuit controls between rapid charging and trickle charging used to charge a NiCd/NiMH battery. The circuit perceives when the rapid charging operation has completely charged the battery and thereafter converts the charging operation to a trickle charging in order to compensate for the charging loss of a battery due to the leakage discharge. The form of charging is controlled by restricting the maximum amount of current provided to the battery using current-mode pulse width modulation.

摘要翻译： 电池充电电路控制用于对NiCd / NiMH电池充电的快速充电和涓流充电。 电路感知快速充电操作何时完全对电池充电，然后将充电操作转换成涓流充电，以便补偿由于泄漏放电引起的电池的充电损失。 通过使用电流模式脉冲宽度调制限制提供给电池的最大电流量来控制充电的形式。

公开(公告)号：US5675485A

公开(公告)日：1997-10-07

申请号：US538808

申请日：1995-10-03

申请人： Hwan-Ho Seong

发明人： Hwan-Ho Seong

IPC分类号： H03K17/00 ,  H02M3/335

CPC分类号： H02M3/33523

摘要： A controller for a switching mode power supply has connections for receiving direct operating potential, a voltage comparator for comparing a fraction of the direct operating potential to a first direct reference potential for developing a voltage comparator output signal, an oscillator for generating oscillations of a prescribed frequency, a pulse width modulator for supplying pulses at a rate determined by those oscillations and with a width controlled by the comparator output signal, and an under-voltage lock-out circuit producing a controlling signal to selectively disable the output pulse signal. The controller is included in a switching mode power supply receiving input power having a direct input potential. The switching mode power supply has a transformer for transforming an alternating voltage generated from the direct input potential; a rectifier for rectifying transformed alternating voltage to produce a direct output potential; a regulator sinking current responsive to the direct output potential from said rectifier being larger or smaller larger than a second direct reference potential; a photo-coupler conducting as input current the current sunk by the regulator, converting the current into an optical signal, and then converting said optical signal into an electric signal; and a switching controlling unit producing a controlling signal to control selective application of the direct input potential to the transformer in response to output current demanded by the photo-coupler. The switching controlling unit comprises a switching-mode-power-supply controller for performing the function of power supply, feedback and soft-start, in response to an operating voltage signal supplied thereto through external pins thereof; a resistor and capacitor converting the magnitude of the current supplied from the photo-coupler into the operating voltage signal; and a switching transistor cyclically tuned on and off in response to a pulse signal produced from the switching-mode-power-supply controller. The switching transistor selectively applies the direct input potential to the transformer for generating the alternating voltage that is transformed.

公开(公告)号：US5777864A

公开(公告)日：1998-07-07

申请号：US745706

申请日：1996-11-12

申请人： Hwan-Ho Seong ,  Jin-Ho Shin

发明人： Hwan-Ho Seong ,  Jin-Ho Shin

IPC分类号： H02M3/10 ,  H02M7/06 ,  H02M7/12 ,  H02M7/48 ,  H02M7/537 ,  H02M7/538 ,  H02M3/24

CPC分类号： H02M7/53803 ,  Y02B70/1441

摘要： A resonant convertor control system regulates a resonant AC current based on the amount of input power consumed by the system. The switching frequency and resonant AC current are limited by a phase difference assurance circuit that compares the phase of a drive signal with the phase of the resonant AC current. By detecting the phase of the resonant current instead of the resonant voltage, it eliminates the need for the costly components required to detect the resonant voltage. The system includes a main power supply for supplying a DC power signal and an inverter that converts the DC power signal to a resonating AC current signal responsive to a drive signal from a drive stage. An input current controller receives a first sense signal that indicates the power consumed by the main power supply and generates a first control signal that regulates the power consumed by the load. A phase difference assurance circuit generates a second control signal responsive to phase difference between the resonant AC current signal and the drive signal. The second control signal adjusts the frequency signal responsive to the second control signal, thereby assuring a phase difference between the second sense signal and the drive signal and eliminating excessive current flow in the inverter.

摘要翻译： 谐振转换器控制系统基于系统消耗的输入功率量来调节谐振AC电流。 开关频率和谐振交流电流受相位差保证电路的限制，该电路将驱动信号的相位与谐振AC电流的相位进行比较。 通过检测谐振电流的相位而不是谐振电压，它消除了对检测谐振电压所需的昂贵部件的需要。 该系统包括用于提供DC电力信号的主电源和响应于来自驱动级的驱动信号将DC电力信号转换为谐振AC电流信号的逆变器。 输入电流控制器接收指示主电源消耗的功率的第一感测信号，并产生调节负载消耗的功率的第一控制信号。 相位差保证电路响应谐振AC电流信号与驱动信号之间的相位差产生第二控制信号。 第二控制信号响应于第二控制信号调节频率信号，从而确保第二感测信号和驱动信号之间的相位差，并消除逆变器中的过大电流。

公开(公告)号：US5606296A

公开(公告)日：1997-02-25

申请号：US600867

申请日：1996-02-13

申请人： Hwan-Ho Seong

发明人： Hwan-Ho Seong

IPC分类号： H03K4/06 ,  H03K7/08 ,  H04N3/27 ,  H03B5/24 ,  H03K3/013

CPC分类号： H03K7/08 ,  H04N3/27

摘要： A pulse width modulation control circuit of the present invention causes variation amplitudes of a sawtooth voltage in a sawtooth oscillator being synchronized by an external signal to be lowered thereby improving characteristics with respect to both a noise and a system control. The pulse width modulation control circuit includes a sawtooth oscillating means for generating a sawtooth voltage after receiving the synchronizing signal, that is, a synchronizing frequency; a sawtooth controller for receiving the sawtooth voltage generated from the sawtooth oscillating means, also receiving a reference voltage with respect to the sawtooth voltage, and outputting a current controlling constantly an amplitude of the sawtooth voltage to the sawtooth oscillating means; and a pulse width modulating means for receiving an output voltage, also receiving a reference voltage with respect to the output voltage, then receiving the sawtooth voltage generated from the sawtooth oscillating means 100, modulating a pulse width.

摘要翻译： 本发明的脉冲宽度调制控制电路使得由外部信号同步的锯齿波形中的锯齿波电压的变化幅度降低，从而提高了噪声和系统控制两者的特性。 脉宽调制控制电路包括锯齿波振荡装置，用于在接收到同步信号之后产生锯齿波电压，即同步频率; 用于接收从锯齿波振荡装置产生的锯齿波电压的锯齿波控制器，还接收相对于锯齿波电压的参考电压，并输出恒定地控制锯齿波电压振幅给锯齿波振荡装置的电流; 以及脉冲宽度调制装置，用于接收也接收相对于输出电压的参考电压的输出电压，然后接收从锯齿波振荡装置100产生的锯齿波电压，调制脉冲宽度。

公开(公告)号：US5949665A

公开(公告)日：1999-09-07

申请号：US773484

申请日：1996-12-23

申请人： Hwan-Ho Seong

发明人： Hwan-Ho Seong

IPC分类号： H03K17/00 ,  H02M1/36 ,  H02M3/00 ,  H03K7/08 ,  H04N3/18 ,  H04N5/63 ,  H02M1/12

CPC分类号： H02M1/36 ,  H04N3/18 ,  H04N5/63

摘要： A soft start pulse width modulation integrated circuit having a reduced number of external connection terminals, a single one of which transmits the soft start signal superimposed upon an external sync signal. The soft start pulse width modulation integrated circuit includes a comparison voltage signal generating circuit, a soft start and external sync generation circuit, a comparator, a triangle signal generator and a pulse width modulator. The voltage level of a comparison voltage signal is increased over time in response to a feedback signal. A DC voltage signal is generated having a voltage level which increases over time but at a lesser rate than the comparison voltage signal and is superimposed with an external sync signal. The superimposed signal is compared with a reference signal and the resulting compared signal determines a triangular signal generated therefrom which has one of two different oscillation modes: a variable natural mode, and a regulated synchronized mode. The pulse width modulator receives the triangular signals and outputs a pulse-width modulated signal from a single external connection which is dependent upon the oscillation output received from the triangular signal generator.

摘要翻译： 一种软启动脉宽调制集成电路，其具有减少数量的外部连接端子，其中一个单独的一个发送叠加在外部同步信号上的软启动信号。 软启动脉宽调制集成电路包括比较电压信号发生电路，软启动和外部同步产生电路，比较器，三角形信号发生器和脉冲宽度调制器。 响应于反馈信号，比较电压信号的电压电平随时间增加。 产生具有电压电平的直流电压信号，该电压电平随着时间而增加，但是比比较电压信号更低的速率并与外部同步信号叠加。 将叠加的信号与参考信号进行比较，并且所得到的比较信号确定由其产生的三角形信号，其具有两种不同振荡模式之一：可变自然模式和调节同步模式。 脉冲宽度调制器接收三角形信号，并从单个外部连接输出脉冲宽度调制信号，这取决于从三角形信号发生器接收到的振荡输出。

公开(公告)号：US5818707A

公开(公告)日：1998-10-06

申请号：US751518

申请日：1996-11-15

申请人： Hwan-Ho Seong ,  Su-Gyeong Kim

发明人： Hwan-Ho Seong ,  Su-Gyeong Kim

IPC分类号： H02M7/217 ,  H02M3/155 ,  H02M3/28 ,  H02M7/12 ,  G05F1/70

CPC分类号： H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

摘要： Disclosed is an active power factor correction integrated circuit for a boost converter, comprising a bias voltage generator coupled to an external power source through a first pin, for generating internal bias voltages used for the integrated circuit; a zero crossing detector coupled magnetically to the inductor through a second pin, for detecting a time at which a voltage across the inductor is zero to provide a zero crossing detection signal; an oscillator reset by the zero crossing detection signal for generating a pulse signal; a flip-flop for generating a first control signal in response to the zero crossing detection signal or the pulse signal; a switching element responsive to the first control signal for enabling a boosted voltage to be provided to the load; an over-current detector for generating an over-current signal when a current flowing through the switching element is over a predetermined value; and a voltage variation detector for detecting variation of a load voltage to generate a variation detection signal and generating a second control signal enabling the boosted voltage to flow through the switching element to a ground in response to both the variation detection signal and the over-current signal. With the integrated circuit, the number of the IC pin and the number of the peripheral components thereof may be considerably reduced.

摘要翻译： 公开了一种用于升压转换器的有源功率因数校正集成电路，包括通过第一引脚耦合到外部电源的偏置电压发生器，用于产生用于集成电路的内部偏置电压; 零交叉检测器通过第二引脚磁耦合到电感器，用于检测电感两端的电压为零的时间以提供过零检测信号; 用于产生脉冲信号的过零检测信号复位的振荡器; 触发器，用于响应于过零检测信号或脉冲信号产生第一控制信号; 响应于所述第一控制信号的开关元件，用于使升压电压能够提供给所述负载; 用于当流过开关元件的电流超过预定值时产生过电流信号的过电流检测器; 以及电压变化检测器，用于检测负载电压的变化以产生变化检测信号，并且响应于变化检测信号和过电流两者产生使升压电压能够通过开关元件流过地的第二控制信号 信号。 利用集成电路，可以显着地减少IC引脚的数量及其周边部件的数量。

公开(公告)号：US5771160A

公开(公告)日：1998-06-23

申请号：US768698

申请日：1996-12-18

申请人： Hwan-Ho Seong

发明人： Hwan-Ho Seong

IPC分类号： H02M3/28 ,  H02M3/335

CPC分类号： H02M3/33561 ,  Y02P80/112

摘要： A multi-output switching regulator includes a rectifier circuit portion for converting an alternating current into a direct current, a boost converter portion for boost-converting the direct current, an inverter portion for storing the output from the boost converter portion in a primary winding of a transformer and transferring the stored energy to a secondary winding, a fly-back type first constant voltage output portion for outputting energy transferred to a first secondary winding of the transformer as a first constant voltage and for storing the first constant voltage in an equivalent flux inductance of the transformer and transferring the stored energy to a second secondary winding, and a second constant voltage output portion for outputting energy transferred to the second secondary winding of the transformer as a second constant voltage. Input power factor correction is achieved as well as the outputting of two constant voltages.

摘要翻译： 多输出开关调节器包括用于将交流电转换为直流电的整流电路部分，用于升压转换直流电流的升压转换器部分，用于将升压转换器部分的输出存储在初级绕组中的逆变器部分 变压器，将存储的能量传送到次级绕组;回扫式第一恒定电压输出部，用于输出转移到变压器的第一次级绕组的能量作为第一恒定电压，并将第一恒定电压存储在等效通量 变压器的电感和将存储的能量传送到第二次级绕组，以及第二恒定电压输出部分，用于输出转移到变压器的第二次级绕组的能量作为第二恒定电压。 实现输入功率因数校正以及输出两个恒定电压。

公开(公告)号：US5757635A

公开(公告)日：1998-05-26

申请号：US773882

申请日：1996-12-26

申请人： Hwan-Ho Seong

发明人： Hwan-Ho Seong

IPC分类号： H02M7/217 ,  H02J3/18 ,  H02M1/42 ,  H02M3/155 ,  H02M7/12 ,  H02M3/24 ,  G05F1/10 ,  H02M5/42

CPC分类号： H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

摘要： A power factor correction circuit includes a boost converter, a zero-current detector for detecting a period in which an inductor current is zero, a half-wave rectifier for supplying a power voltage proportional to an output voltage of the boost converter, a control voltage generator for generating a control voltage to control the turn-on time timing of a sense-FET, a turn-on controller for making constant a turn-on duration of the sense-FET, an over current detector for generating a signal when a mirror terminal current of the sense-FET is greater than a predetermined current, an OR gate for performing a logic OR operation of the output signals of the turn-on controller and the over current detector, an output current controller for generating a gate drive signal of the sense-FET, and an under voltage lock out for turning off the power voltage when the power voltage is less than a predetermined voltage. This circuit enables an external pin count to be reduced by having a built-in boost converter controller and a built-in sense-FET in a single package.

摘要翻译： 功率因数校正电路包括升压转换器，用于检测电感器电流为零的周期的零电流检测器，用于提供与升压转换器的输出电压成比例的电压的半波整流器，控制电压 发电机，用于产生控制电压以控制感测FET的导通时间定时，用于使感测FET的导通持续时间恒定的导通控制器，用于当镜子产生信号时的过电流检测器 感测FET的端子电流大于预定电流，用于执行导通控制器和过电流检测器的输出信号的逻辑或运算的或门，用于产生栅极驱动信号的输出电流控制器 感测FET，以及当电源电压小于预定电压时关闭电源电压的欠压锁定。 该电路通过在单个封装中具有内置升压转换器控制器和内置检测FET来实现外部引脚数量的降低。