公开(公告)号：US08829802B2

公开(公告)日：2014-09-09

申请号：US13506813

申请日：2012-05-18

申请人： Qi Cui Wei ,  Zong Bing Li ,  Xiao Song ,  Da Feng Weng

发明人： Qi Cui Wei ,  Zong Bing Li ,  Xiao Song ,  Da Feng Weng

IPC分类号： H05B37/02 ,  H05B37/00

CPC分类号： H05B37/02 ,  H05B33/0845 ,  Y02B20/14 ,  Y02B20/144

摘要： In order to keep the advantage of PWM dimming control scheme and make the LED driver high reliability and the LED lamp long lifetime, it is required that the frequency of PWM dimming control scheme is related with or the same as the output frequency of existed dimmers; and the output PWM dimming pulse is covered by the output pulse from dimmers further. The present invention discloses a novel “LED dimming control” scheme to make that the frequency of PWM dimming control scheme is related with or the same as the output frequency of dimmers; and the output PWM dimming pulse is covered by the output pulse from the dimmers further. In this way, it can guarantee that as PWM dimming pulse comes, the output from the dimmer can offer enough power to the LED driver and the LED driver can output the required LED driving current without flicker.

摘要翻译： 为了保持PWM调光控制方案的优势，使LED驱动器的可靠性高，LED灯具寿命长，要求PWM调光控制方案的频率与存在的调光器的输出频率相同或相同; 并且输出PWM调光脉冲进一步被来自调光器的输出脉冲覆盖。 本发明公开了一种新颖的“LED调光控制”方案，使PWM调光控制方案的频率与调光器的输出频率相同或相同; 并且输出PWM调光脉冲进一步被来自调光器的输出脉冲覆盖。 这样，可以保证随着PWM调光脉冲的出现，来自调光器的输出可以为LED驱动器提供足够的电力，而LED驱动器可以不闪烁地输出所需的LED驱动电流。

公开(公告)号：US20120306401A1

公开(公告)日：2012-12-06

申请号：US13506813

申请日：2012-05-18

申请人： Qi Cui Wei ,  Da Feng Weng ,  Zong Bing Li ,  Xiao Song

发明人： Qi Cui Wei ,  Da Feng Weng ,  Zong Bing Li ,  Xiao Song

IPC分类号： H05B37/02

CPC分类号： H05B37/02 ,  H05B33/0845 ,  Y02B20/14 ,  Y02B20/144

摘要： In order to keep the advantage of PWM dimming control scheme and make the LED driver high reliability and the LED lamp long lifetime, it is required that the frequency of PWM dimming control scheme is related with or the same as the output frequency of existed dimmers; and the output PWM dimming pulse is covered by the output pulse from dimmers further. The present invention discloses a novel “LED dimming control” scheme to make that the frequency of PWM dimming control scheme is related with or the same as the output frequency of dimmers; and the output PWM dimming pulse is covered by the output pulse from the dimmers further. In this way, it can guarantee that as PWM dimming pulse comes, the output from the dimmer can offer enough power to the LED driver and the LED driver can output the required LED driving current without flicker.

摘要翻译： 为了保持PWM调光控制方案的优势，使LED驱动器的可靠性高，LED灯具寿命长，要求PWM调光控制方案的频率与存在的调光器的输出频率相同或相同; 并且输出PWM调光脉冲进一步被来自调光器的输出脉冲覆盖。 本发明公开了一种新颖的LED调光控制方案，使得PWM调光控制方案的频率与调光器的输出频率相同或相同; 并且输出PWM调光脉冲进一步被来自调光器的输出脉冲覆盖。 这样，可以保证随着PWM调光脉冲的出现，来自调光器的输出可以为LED驱动器提供足够的电力，而LED驱动器可以不闪烁地输出所需的LED驱动电流。

公开(公告)号：US20150042294A1

公开(公告)日：2015-02-12

申请号：US13987573

申请日：2013-08-09

申请人： Qi Cui Wei ,  Da Feng Weng ,  Zong Bing Li

发明人： Qi Cui Wei ,  Da Feng Weng ,  Zong Bing Li

IPC分类号： H02M3/04

CPC分类号： H02M3/04 ,  H02M3/157 ,  H03K7/08

摘要： The high accuracy pulse duty-cycle calculation hardware implementation scheme is composed of a clock generator block, digital pulse width account block, digital memory block to store pulse width in digital and digital-analog divider block with two digital-analog converters. The digital pulse width account block is used to account the two pulse width of a pulse, e.g. turn-on time TON, turn-off time TOFF, cycle time TS or other time variable in digital method. The digital memory block is used to store digital information from the digital pulse width account block until next cycle. The digital-analog divider block outputs the ratio of two pulse widths in analog signal based on two stored digital pulse widths from the digital memory block

摘要翻译： 高精度脉冲占空比计算硬件实现方案由时钟发生器模块，数字脉冲宽度占用模块，数字存储模块组成，数字存储模块用于存储具有两个数模转换器的数字和数模分频器模块的脉宽。 数字脉冲宽度帐户块用于考虑脉冲的两个脉冲宽度，例如， 开机时间TON，关机时间TOFF，循环时间TS或其他时间变量的数字方式。 数字存储块用于存储数字脉冲宽度帐户块的数字信息，直到下一个周期。 数字模拟除法器块根据数字存储器块中存储的两个数字脉冲宽度输出模拟信号中两个脉冲宽度的比例

公开(公告)号：US20150016157A1

公开(公告)日：2015-01-15

申请号：US13987172

申请日：2013-07-09

申请人： Qi Cui Wei ,  Da Feng Weng

发明人： Qi Cui Wei ,  Da Feng Weng

IPC分类号： H02H7/12

CPC分类号： H02M3/33507 ,  H02M3/156

摘要： The constant switching frequency discontinuous current mode average output current control scheme is composed of a reference block, reference calculation block, state detecting block, error detector block, zero state detector, power driver block and internal clock. The reference block generates preset reference; The reference calculation block, based on the power current converter's power topology, the correspondent algorithm is calculated to convert the input reference from the reference block into correspondent output; It is the output of reference calculation block that makes state detecting block, error detector block, zero state detector, power driver block and internal clock operate together and control the power current converter's output following with the output of reference block

摘要翻译： 恒定开关频率不连续电流模式平均输出电流控制方案由参考块，参考计算块，状态检测块，误差检测器块，零状态检测器，功率驱动器块和内部时钟组成。 参考块产生预设参考; 参考计算块基于功率电流转换器的功率拓扑，计算相应的算法将输入参考从参考块转换为相应输出; 参考计算块的输出，使状态检测块，误差检测器块，零状态检测器，功率驱动器块和内部时钟一起工作，并控制电流转换器的输出跟随参考块的输出

公开(公告)号：US20110298437A1

公开(公告)日：2011-12-08

申请号：US13134216

申请日：2011-05-31

申请人： Da Feng Weng ,  Qi Cui Wei

发明人： Da Feng Weng ,  Qi Cui Wei

IPC分类号： G05F1/10

CPC分类号： H02M3/156

摘要： A switching adapter control method for adaptive mobile power systems is composed of reference current generator, current mode error compensator, controllable constant turn-off timer, PWM generator and MOSFET driver. The output of the switching adapter can show constant current and voltage characteristics, that means, as the DC bus voltage is over a preset voltage, the adaptor's output characteristic is converted from a constant current source into a constant voltage source with the preset voltage. For low output capacitance case, the present invention has the ability to smoothly reduce the switching frequency of the switching adaptor and reduce the switching losses and meet Energy Star 2.0 requirements under different load conditions. And the output ripple current and voltage can be in the allowed range.

摘要翻译： 自适应移动电源系统的开关适配器控制方法由参考电流发生器，电流模式误差补偿器，可控恒定关断定时器，PWM发生器和MOSFET驱动器组成。 开关适配器的输出可以显示恒定的电流和电压特性，这意味着，当直流总线电压超过预设电压时，适配器的输出特性将从恒定电流源转换为具有预设电压的恒定电压源。 对于低输出电容情况，本发明能够平滑地降低开关适配器的开关频率并降低开关损耗，并在不同负载条件下满足能源之星2.0要求。 并且输出纹波电流和电压可以在允许的范围内。

公开(公告)号：US20100231184A1

公开(公告)日：2010-09-16

申请号：US12583576

申请日：2009-08-24

申请人： Qi Cui Wei ,  Da Feng Weng

发明人： Qi Cui Wei ,  Da Feng Weng

IPC分类号： H02M3/04

CPC分类号： H02M3/156

摘要： The invention presents a simple and high accuracy output current detect and control scheme to control the output current of the step up-down (Buck-Boost) and step up (Boost) switching converter, It makes step up-down (Buck-Boost) and step up (Boost) switching power converter operate in wide input voltage range and low in total BOM cost and the switching converter can be used as a controllable current source for several applications

摘要翻译： 本发明提供了一种简单高精度的输出电流检测和控制方案，用于控制升压（降压 - 升压）和升压（Boost）开关转换器的输出电流，它使步进（Buck-Boost） 和升压（Boost）开关电源转换器在宽输入电压范围内工作，总BOM成本低，开关转换器可用作多种应用的可控电流源

公开(公告)号：US20110176336A1

公开(公告)日：2011-07-21

申请号：US12799389

申请日：2010-04-26

申请人： Da Feng Weng ,  Qi Cui Wei

发明人： Da Feng Weng ,  Qi Cui Wei

IPC分类号： H02M3/335

CPC分类号： H02M3/156 ,  H02M3/33538 ,  H02M2001/007

摘要： The isolated current regulated DC-DC converter is composed of the step down switch SA, free wheel diode DA, step down inductor L, switches S1 and S2, capacitor Cc to absorb the leakage energy of the switching transformer, output diodes D3 and D4, output filter capacitor C and the switching transformer T; one terminal of the step down inductor L is connected with the step down switch SA and free wheel diode DA, and other terminal of the step down inductor L is connected with one of primary windings of the switching transformer and switch S1 or S2; two primary windings of the switching transformer are respectively connected with switches S1 and S2 in series; two primary winding and switch S1 or S2 branches are paralleled and respectively connected with the free wheel diode DA and the step down inductor L; the free wheel diode DA is series with the step down switch SA and they connect with the input voltage Vin; the capacitor Cc to absorb the leakage energy of the switching transformer is respectively connected with switches S1 and S2; the full wave rectifier is composed of two secondary windings and output diodes D3, D4; the output capacitor C is paralleled with the output load. The converter has the same voltage and current stress and dynamic regulation as one of regular step down DC-DC converter. It also has function to isolate the input and the output with the switching transformer. In practical application, due to the freedom of the switching transformer's turns-ratio, it is possible to make the isolated current regulated DC-DC converter to operate in much better condition than one for the regular step down DC-DC converter and to have higher efficiency.

摘要翻译： 隔离电流调节DC-DC转换器由降压开关SA，续流二极管DA，降压电感L，开关S1和S2，电容器Cc组成，以吸收开关变压器，输出二极管D3和D4的漏电能， 输出滤波电容C和开关变压器T; 降压电感L的一个端子与降压开关SA和续流二极管DA连接，降压电感L的另一端与开关变压器的一个初级绕组和开关S1或S2连接; 开关变压器的两个初级绕组分别与开关S1和S2串联连接; 两个初级绕组和开关S1或S2分支并联并分别与续流二极管DA和降压电感L连接; 续流二极管DA与降压开关SA串联，并与输入电压Vin连接; 吸收开关变压器的漏电能的电容器Cc分别与开关S1和S2相连; 全波整流器由两个次级绕组和输出二极管D3，D4组成; 输出电容器C与输出负载并联。 该转换器具有与常规降压DC-DC转换器之一相同的电压和电流应力和动态调节。 它还具有隔离开关变压器的输入和输出的功能。 在实际应用中，由于开关变压器匝数比的自由度，可以使隔离电流调节型DC-DC转换器的工作状态比常规降压DC-DC转换器的状态好得多，并且具有更高的 效率。

公开(公告)号：US08629670B2

公开(公告)日：2014-01-14

申请号：US13134216

申请日：2011-05-31

申请人： Da Feng Weng ,  Qi Cui Wei

发明人： Da Feng Weng ,  Qi Cui Wei

IPC分类号： G05F1/575

CPC分类号： H02M3/156

摘要： A switching adapter control method for adaptive mobile power systems is composed of reference current generator, current mode error compensator, controllable constant turn-off timer, PWM generator and MOSFET driver. The output of the switching adapter can show constant current and voltage characteristics, that means, as the DC bus voltage is over a preset voltage, the adaptor's output characteristic is converted from a constant current source into a constant voltage source with the preset voltage. For low output capacitance case, the present invention has the ability to smoothly reduce the switching frequency of the switching adaptor and reduce the switching losses and meet Energy Star 2.0 requirements under different load conditions. And the output ripple current and voltage can be in the allowed range.

摘要翻译： 自适应移动电源系统的开关适配器控制方法由参考电流发生器，电流模式误差补偿器，可控恒定关断定时器，PWM发生器和MOSFET驱动器组成。 开关适配器的输出可以显示恒定的电流和电压特性，这意味着，当直流总线电压超过预设电压时，适配器的输出特性将从恒定电流源转换为具有预设电压的恒定电压源。 对于低输出电容情况，本发明能够平滑地降低开关适配器的开关频率并降低开关损耗，并在不同负载条件下满足能源之星2.0要求。 并且输出纹波电流和电压可以在允许的范围内。

公开(公告)号：US06317347B1

公开(公告)日：2001-11-13

申请号：US09684195

申请日：2000-10-06

申请人： Da Feng Weng

发明人： Da Feng Weng

IPC分类号： H02M7538

CPC分类号： H02M7/5381 ,  H02M2007/4815 ,  H05B41/2824 ,  H05B41/3927 ,  Y02B70/1441

摘要： An inverter circuit for supplying power to a lamp. The circuit comprises a DC voltage supply source. The circuit also comprises a transformer having a primary and a secondary winding. The secondary winding is coupled to the lamp and the primary winding is coupled to the DC supply source. The circuit also comprises a pair of inductors coupled in series to opposite ends of the primary winding. A capacitor couples the inductors together. The circuit is configured such that the pair of inductors, in conjunction with the capacitor, alternately resonate to provide an AC current supply source to the lamp. The circuit further comprises a pair of switches which alternately turn “on” and “off”, thereby causing the pair of inductors to alternately resonate. A control driver is coupled to the pair of switches and is configured to alternately turn on and off the pair of switches. Advantageously, the control driver comprises a PWM control driver. Preferably, the primary winding includes a transformer tap that defines a first section and a second section, and the DC supply source is coupled to the primary winding.

摘要翻译： 一种用于向灯供电的逆变器电路。 该电路包括直流电压源。 电路还包括具有初级和次级绕组的变压器。 次级绕组耦合到灯，并且初级绕组耦合到DC电源。 电路还包括串联耦合到初级绕组的相对端的一对电感器。 电容器将电感器耦合在一起。 电路被配置为使得该对电感器与电容器结合地交替谐振以向灯提供AC电流源。 电路还包括交替地“开”和“关”的一对开关，从而使该对电感器交替谐振。 控制驱动器耦合到该对开关，并且被配置为交替地打开和关闭该对开关。 有利地，控制驱动器包括PWM控制驱动器。 优选地，初级绕组包括限定第一部分和第二部分的变压器抽头，并且DC供应源耦合到初级绕组。

公开(公告)号：US5986901A

公开(公告)日：1999-11-16

申请号：US112381

申请日：1998-07-09

申请人： Da Feng Weng

发明人： Da Feng Weng

IPC分类号： H02M1/00 ,  H02M1/42 ,  H05B41/28 ,  H02M1/12

CPC分类号： H02M1/4266 ,  H05B41/28 ,  Y02B70/123

摘要： A power factor correction circuit, usable with, for example, a switching power supply of a discharge lamp. The power factor correction circuit includes a shaping system that shapes an input current of a power line during a predetermined period proximate a zero line crossing point of the input current; and a minimizing system that minimizes a pulsating of the input current.

摘要翻译： 功率因数校正电路，可用于例如放电灯的开关电源。 功率因数校正电路包括：成形系统，其在输入电流的零线交叉点附近的预定周期期间对电力线的输入电流进行整形; 以及使输入电流脉动最小化的最小化系统。