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1. 发明授权

EP2299578B1 Dc/dc converter having a fast and accurate average current limit 有权转让
标题翻译： DC-DC转换器的平均电流的快速而精确的极限
公开(公告)号：EP2299578B1
公开(公告)日：2013-07-31
申请号：EP10009840.9
申请日：2010-09-17
申请人： Linear Technology Corporation
发明人： Hawkes, Charles Edward
IPC分类号： H02M3/156
CPC分类号： H02M3/156

2. 发明授权

EP2393190B1 DC/DC converter with magnetic flux density limits 有权转让
标题翻译： DC转换器的磁通密度限制
公开(公告)号：EP2393190B1
公开(公告)日：2016-12-14
申请号：EP11004553.1
申请日：2011-06-03
申请人： Linear Technology Corporation
发明人： Coley, William Hall , Hawkes, Charles Edward , Mathews, Kurk David
IPC分类号： H02M1/40 , H02M3/335 , H02M3/337
CPC分类号： H02M1/40 , H02M3/33569 , H02M3/3378

3. 发明公开

EP3091650A1 IMPROVING THE ACCURACY OF A VOLT-SECOND CLAMP IN AN ISOLATED DC/DC CONVERTER 审中-公开
标题翻译： EEREM ISOLIERTEN GLEICHSTROMWANDLER中的VERBESSERUNG DER GENAUIGKEIT EINER VOLTSEKUNDENKLEMME
公开(公告)号：EP3091650A1
公开(公告)日：2016-11-09
申请号：EP16001187.0
申请日：2010-09-17
申请人： Linear Technology Corporation
发明人： Hawkes, Charles Edward
IPC分类号： H02M1/40 , H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0022
摘要： A system for controlling a circuit having a transformer arranged between input circuitry and output circuitry to galvanically isolate the output circuitry from the input circuitry comprises a power switch controlled to apply voltage to the transformer, a switch control circuit responsive to a difference between a variable control value and a variable reference value to control the power switch so as to control the voltage applied to the transformer, a control value generating circuit for producing the control value as a function of the voltage applied to the transformer and an on-time of the switch, and a reference circuit for producing the reference value that varies as a function of the voltage applied to the transformer
摘要翻译：一种用于控制具有布置在输入电路和输出电路之间以将输出电路与输入电路电隔离的电路的电路的系统包括被控制为向变压器施加电压的电源开关，响应于可变控制值和可变参考值，以控制电源开关以控制施加到变压器的电压;控制值产生电路，用于产生作为施加到变压器的电压的函数的控制值和开关的接通时间以及用于产生基于施加到变压器的电压的函数而变化的参考值的参考电路

4. 发明公开

EP2299578A3 Dc/dc converter having a fast and accurate average current limit 有权转让
标题翻译： DC / DC转换器具有快速和精确的平均电流限制
公开(公告)号：EP2299578A3
公开(公告)日：2011-05-04
申请号：EP10009840.9
申请日：2010-09-17
申请人： Linear Technology Corporation
发明人： Hawkes, Charles Edward
IPC分类号： H02M3/156
CPC分类号： H02M3/156
摘要： In order to overcome the three main obstacles to obtaining a fast and accurate average current limit in a DC/DC converter, three distinct improvements are provided which can work in concert to achieve the goal. Each of the three parts comprises significant new improvements, and their use together to create an average current limit is also believed to be novel. The first improvement relates to providing a bias signal control configured to apply a variable DC bias signal to the compensation ramp signal generated in the DC/DC converter so that the compensating ramp signal is biased to zero at the end of each ON-time for each cycle so that the peak current limit is independent of the duty cycle of the pulse width modulation signal during current limit conditions. A second improvement relates to modulating the clamp voltage that establishes the peak current limit as a function of ripple of the inductor current for each cycle of the pulse width modulation signal so as to reduce or cancel the effect of the inductor ripple current on the average output current during current limit conditions. The third improvement relates to adjusting the frequency of the pulse width modulation signal during current limit conditions as a function of both the input voltage and the output voltage of the DC/DC converter.
摘要翻译：为了克服在DC / DC转换器中获得快速且准确的平均电流限制的三个主要障碍，提供了三个可以协同工作以实现目标的明显改进。三部分中的每一部分都包含重大的新改进，并且它们一起用于创建平均电流限制也被认为是新颖的。第一个改进涉及提供偏置信号控制，该偏置信号控制被配置为将可变DC偏置信号施加到在DC / DC转换器中产生的补偿斜坡信号，使得补偿斜坡信号在每个导通时间结束时被偏置为零以便在电流限制条件下，峰值电流限制与脉宽调制信号的占空比无关。第二个改进涉及调制建立作为脉宽调制信号的每个周期的电感器电流的纹波的函数的峰值电流限制的钳位电压，以减少或消除电感纹波电流对平均输出的影响电流限制条件下的电流。第三个改进涉及在电流限制条件期间根据DC / DC转换器的输入电压和输出电压调整脉宽调制信号的频率。

5. 发明公开

EP2393190A3 DC/DC converter with magnetic flux density limits 有权转让
标题翻译： DC转换器的磁通密度限制
公开(公告)号：EP2393190A3
公开(公告)日：2013-01-30
申请号：EP11004553.1
申请日：2011-06-03
申请人： Linear Technology Corporation
发明人： Coley, William Hall , Hawkes, Charles Edward , Mathews, Kurk David
IPC分类号： H02M1/40 , H02M3/335 , H02M3/337
CPC分类号： H02M1/40 , H02M3/33569 , H02M3/3378
摘要： A DC/DC converter may include a power stage circuit, a pulse generator circuit, a flux density monitor, and power control logic. The power stage circuit includes an input, an output, and a transformer with a core. The power stage circuit may be configured to operate in a power transfer mode during which power is transferred from the input to the output and a reset mode during which flux density in the core of the transformer is reduced. The pulse generator circuit may be configured to generate pulses that regulate the output of the power stage circuit. The flux density monitor circuit may be configured to generate flux density information indicative of the flux density of the core of the transformer during both the power transfer mode and the reset mode. The power stage control logic may be configured to regulate the output of the power stage circuit based on the pulses and to prevent the core of the transformer from saturating based on the flux density information.

6. 发明公开

EP3157150A3 DC/DC CONVERTER WITH MAGNETIC FLUX DENSITY LIMITS 有权转让
标题翻译：具有磁通量密度限制的DC / DC转换器
公开(公告)号：EP3157150A3
公开(公告)日：2017-05-03
申请号：EP16002475.8
申请日：2011-06-03
申请人： Linear Technology Corporation
发明人： Coley, William Hall , Hawkes, Charles Edward , Mathews, Kurk David
IPC分类号： H02M1/40 , H02M3/335 , H02M3/337
CPC分类号： H02M1/40 , H02M3/33569 , H02M3/3378
摘要： The present invention relates to a DC-DC converter comprising:
a power stage circuit that includes an input, an output, and a transformer with a core, the power stage circuit being configured to operate in a power transfer mode during which power is transferred from the input to the output and a reset mode during which flux density in the core of the transformer is reduced;
a pulse generator circuit configured to generate pulses that regulate the output of the power stage circuit;
a flux density monitor circuit configured to generate flux density information indicative of the flux density of the core of the transformer during both the power transfer mode and the reset mode; and
power stage control logic configured to regulate the output of the power stage circuit based on the pulses and to prevent the core of the transformer from saturating based on the flux density information,
wherein the DC/DC converter is a forward converter, and
wherein the pulse generator is configured to:
generate a maximum duty cycle pulse that terminates the power transfer phase when the duty cycle of the power transfer phase reaches or exceeds a pre-determined threshold; and/or
to terminate the power transfer phase when current in the output of the power stage circuit reaches or exceeds a pre-determined amount.
摘要翻译： DC-DC变换器技术领域本发明涉及一种DC-DC变换器，其包括：功率级电路，其包括输入端，输出端和具有内核的变压器，所述功率级电路被配置为在功率传输模式下操作，到输出端的输入和复位模式，在此期间变压器铁芯中的磁通密度减小; 脉冲发生器电路，被配置为产生调节所述功率级电路的输出的脉冲; 通量密度监测电路，其被配置成在所述功率传输模式和所述复位模式两者期间生成指示所述变压器的所述磁芯的通量密度的通量密度信息; 以及功率级控制逻辑，其被配置为基于所述脉冲来调节所述功率级电路的输出并且基于所述通量密度信息来防止所述变压器的磁芯饱和，其中所述DC / DC转换器是正向转换器，并且其中所述脉冲发生器被配置为：当所述功率传送阶段的占空比达到或超过预定阈值时，生成终止所述功率传送阶段的最大占空比脉冲; 和/或当功率级电路的输出中的电流达到或超过预定量时终止功率传输阶段。

7. 发明公开

EP3157150A2 DC/DC CONVERTER WITH MAGNETIC FLUX DENSITY LIMITS 有权转让
标题翻译： GLEICHSPANNUNGSWANDLER MIT MAGNETFLUSSDICHTEBEGRENZUNGEN
公开(公告)号：EP3157150A2
公开(公告)日：2017-04-19
申请号：EP16002475.8
申请日：2011-06-03
申请人： Linear Technology Corporation
发明人： Coley, William Hall , Hawkes, Charles Edward , Mathews, Kurk David
IPC分类号： H02M1/40 , H02M3/335 , H02M3/337
CPC分类号： H02M1/40 , H02M3/33569 , H02M3/3378
摘要： The present invention relates to a DC-DC converter comprising:
a power stage circuit that includes an input, an output, and a transformer with a core, the power stage circuit being configured to operate in a power transfer mode during which power is transferred from the input to the output and a reset mode during which flux density in the core of the transformer is reduced;
a pulse generator circuit configured to generate pulses that regulate the output of the power stage circuit;
a flux density monitor circuit configured to generate flux density information indicative of the flux density of the core of the transformer during both the power transfer mode and the reset mode; and
power stage control logic configured to regulate the output of the power stage circuit based on the pulses and to prevent the core of the transformer from saturating based on the flux density information,
wherein the DC/DC converter is a forward converter, and
wherein the pulse generator is configured to:
generate a maximum duty cycle pulse that terminates the power transfer phase when the duty cycle of the power transfer phase reaches or exceeds a pre-determined threshold; and/or
to terminate the power transfer phase when current in the output of the power stage circuit reaches or exceeds a pre-determined amount.
摘要翻译：本发明涉及一种DC-DC转换器，包括：功率级电路，其包括输入，输出和具有磁芯的变压器，所述功率级电路被配置为在功率传递模式下工作，在该功率级电路中，输出到输出端和复位模式，在该模式期间，变压器磁芯中的磁通密度减小; 脉冲发生器电路，其被配置为产生调节所述功率级电路的输出的脉冲; 磁通密度监测电路，被配置为在功率传输模式和复位模式期间产生指示变压器磁芯的磁通密度的磁通密度信息; 以及功率级控制逻辑，被配置为基于所述脉冲调节所述功率级电路的输出，并且基于所述磁通密度信息来防止所述变压器的磁芯饱和，其中所述DC / DC转换器是正向转换器，并且其中脉冲发生器被配置为：当电力传输阶段的占空比达到或超过预定阈值时，产生终止电力传送阶段的最大占空比脉冲; 和/或当功率级电路的输出中的电流达到或超过预定量时终止电力传送阶段。

8. 发明公开

EP2393190A2 DC/DC converter with magnetic flux density limits 有权转让
标题翻译： Gleichspannungswandler mit Magnetflussdichtebegrenzungen
公开(公告)号：EP2393190A2
公开(公告)日：2011-12-07
申请号：EP11004553.1
申请日：2011-06-03
申请人： Linear Technology Corporation
发明人： Coley, William Hall , Hawkes, Charles Edward , Mathews, Kurk David
IPC分类号： H02M1/40
CPC分类号： H02M1/40 , H02M3/33569 , H02M3/3378
摘要： A DC/DC converter may include a power stage circuit, a pulse generator circuit, a flux density monitor, and power control logic. The power stage circuit includes an input, an output, and a transformer with a core. The power stage circuit may be configured to operate in a power transfer mode during which power is transferred from the input to the output and a reset mode during which flux density in the core of the transformer is reduced. The pulse generator circuit may be configured to generate pulses that regulate the output of the power stage circuit. The flux density monitor circuit may be configured to generate flux density information indicative of the flux density of the core of the transformer during both the power transfer mode and the reset mode. The power stage control logic may be configured to regulate the output of the power stage circuit based on the pulses and to prevent the core of the transformer from saturating based on the flux density information.
摘要翻译： DC / DC转换器可以包括功率级电路，脉冲发生器电路，磁通密度监测器和功率控制逻辑。功率级电路包括一个输入端，一个输出端和一个带有磁芯的变压器。功率级电路可以被配置为在功率从输入传输到输出的功率传递模式下工作，以及在变压器的磁芯中的磁通密度减小的复位模式。脉冲发生器电路可以被配置为产生调节功率级电路的输出的脉冲。通量密度监测电路可以被配置为在功率传输模式和复位模式期间产生指示变压器的磁芯的磁通密度的磁通密度信息。功率级控制逻辑可以被配置为基于脉冲来调节功率级电路的输出，并且基于磁通密度信息来防止变压器的磁芯饱和。

9. 发明公开

EP2299579A1 Extending achievable duty cycle range in DC/DC forward converter with active clamp reset 有权转让
标题翻译： Eeem Gleichstrom-Durchflusswandler mit Erriterung des erzielbaren Arbeitszyklusbereichs有效夹/重置
公开(公告)号：EP2299579A1
公开(公告)日：2011-03-23
申请号：EP10009841.7
申请日：2010-09-17
申请人： Linear Technology Corporation
发明人： Coley, William Hall , Hawkes, Charles Edward
IPC分类号： H02M3/335
CPC分类号： H02M3/33538 , H02M3/33592 , Y02B70/1475 , Y10T307/50
摘要： Novel system and methodology are provided for controlling a DC/DC forward converter (200) having a transformer (PT) with primary and secondary windings, a reset switch (AG), and a first switch (PG) coupled to the primary winding of the transformer. The control system involves a PWM control circuit (202,204,206) responsive to an output signal (V out ) of the converter (200) for producing a PWM signal to control switching of the reset switch (AG), and the first switch (PG). A period of the PWM signal includes an on-time interval for enabling transfer of power via the transformer (PT) when the first switch (PG) is on, and a reset time interval for enabling reset of the transformer (PT) when the reset switch (AG) is on. A maximum value of the on-time interval is pre-set to provide sufficient time for the reset. The reset switch (AG) is turned off when the PWM signal goes from a first level to a second level. A first delay period is set between time when the reset switch turns off and time when the first switch turns (PG) on. A first delay control circuit (206) is provided for reducing the first delay time when the on-time interval approaches the maximum value. Further, the converter (200) may include a second switch (FG) coupled to the secondary winding of the transformer (PT). A second delay period shorter than the first delay period may be set between time when the reset switch (AG) turns off and time when the second switch (FG) turns on. A second delay control circuit (204) may be provided for reducing the second delay period when the on-time interval approaches the maximum value.
摘要翻译：提供了新的系统和方法来控制具有初级和次级绕组的变压器（PT）的DC / DC正向转换器（200），复位开关（AG）和耦合到所述初级绕组的初级绕组的第一开关（PG）变压器。控制系统包括响应于转换器（200）的输出信号（V out）的PWM控制电路（202,204,206），用于产生PWM信号以控制复位开关（AG）和第一开关（PG）的切换。 PWM信号的周期包括当第一开关（PG）导通时能够经由变压器（PT）传输电力的导通时间间隔和当复位时允许变压器（PT）复位的复位时间间隔开关（AG）打开。预设接通时间间隔的最大值，以提供足够的时间进行复位。当PWM信号从第一电平变为第二电平时，复位开关（AG）关闭。在复位开关关闭的时间和第一开关转动（PG）导通的时间之间设定第一延迟时间。提供第一延迟控制电路（206），用于在接通时间间隔接近最大值时减少第一延迟时间。此外，转换器（200）可以包括耦合到变压器（PT）的次级绕组的第二开关（FG）。可以在复位开关（AG）关闭的时间和第二开关（FG）导通时的时间之间设定比第一延迟时间短的第二延迟时间。可以提供第二延迟控制电路（204），用于在接通时间间隔接近最大值时减小第二延迟时段。

10. 发明授权

EP2299579B1 Extending achievable duty cycle range in DC/DC forward converter with active clamp reset 有权转让
标题翻译：在与有源钳位的DC-正激变换器的实现占空比范围的扩大/复位
公开(公告)号：EP2299579B1
公开(公告)日：2017-04-19
申请号：EP10009841.7
申请日：2010-09-17
申请人： Linear Technology Corporation
发明人： Coley, William Hall , Hawkes, Charles Edward
IPC分类号： H02M3/335 , H02M1/34
CPC分类号： H02M3/33538 , H02M3/33592 , Y02B70/1475 , Y10T307/50

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