公开(公告)号：US20030107358A1

公开(公告)日：2003-06-12

申请号：US10304203

申请日：2002-11-26

Applicant: Intersil Americas Inc.

Inventor： Robert Haynes Isham ,  Paul K. Sferrazza

IPC: G05F001/40

CPC classification number: H02M3/156 ,  G01R19/32 ,  G05F3/262 ,  H02M2001/0009

Abstract: A programmably switched, multi-output stage current mirror-based, current-sensing and correction circuit controls the operation of a buck mode DC-DC converter. This correction circuit generates a correction current having a prescribed step-wise temperature-compensating relationship to sensed current. The sensed current is derived from a variable impedance controlled by a sense amplifier coupled via a current feedback resistor to the common output node between a high side power switching device and a low side power switching device of the converter. To program the correction circuit a decoder maps temperature information associated with the low side power switching device and additional programming information into a current mirror control code.

Abstract translation: 可编程切换的多输出级电流反射镜，电流检测和校正电路控制降压模式DC-DC转换器的操作。 该校正电路产生对感测电流具有规定的逐步温度补偿关系的校正电流。 所感测的电流源自由经由电流反馈电阻器连接到转换器的高侧功率开关器件和低侧功率开关器件之间的公共输出节点的读出放大器控制的可变阻抗。 为了对校正电路进行编程，解码器将与低侧功率开关器件相关联的温度信息和附加编程信息映射到当前镜像控制代码中。

公开(公告)号：US20030111984A1

公开(公告)日：2003-06-19

申请号：US10304245

申请日：2002-11-26

Applicant: Intersil Americas Inc.

Inventor： Robert Haynes Isham

IPC: G05F001/44

CPC classification number: H02M3/156 ,  G01R19/0092 ,  G01R31/40 ,  H02M2001/0009 ,  Y10S323/907

Abstract: A current-sensing and correction circuit having programmable temperature compensation circuitry that is incorporated into a pulse width modulation controller of a buck mode DC-DC converter. The front end of the controller contains a sense amplifier, having an input coupled via a current feedback resistor to a common output node of the converter. The impedance of a MOSFET, the current through which is sampled by a sample and hold circuit is controlled by the sense amplifier unit. A sensed current correction circuit is coupled between the sample and hold circuit and the controller, and is operative to supply to the controller a correction current having a deterministic temperature-compensating relationship to the sensed current. The ratio of correction current to sensed current equals a value of one at a predetermined temperature, and has other values at temperatures other than at that temperature.

Abstract translation: 具有可编程温度补偿电路的电流检测和校正电路，其被并入到降压模式DC-DC转换器的脉宽调制控制器中。 控制器的前端包含读出放大器，其具有通过电流反馈电阻耦合到转换器的公共输出节点的输入。 MOSFET的阻抗，由采样和保持电路采样的电流由读出放大器单元控制。 感测的电流校正电路耦合在采样和保持电路与控制器之间，并且可操作以向控制器提供具有与感测电流的确定性温度补偿关系的校正电流。 校正电流与感测电流的比值等于在预定温度下的值1，并且在除了该温度之外的温度下具有其它值。

公开(公告)号：US20040090218A1

公开(公告)日：2004-05-13

申请号：US10691251

申请日：2003-10-22

Applicant: Intersil Americas Inc.

Inventor： Robert Haynes Isham

IPC: G05F001/40

CPC classification number: H02M3/1588 ,  H02M1/32 ,  Y02B70/1466

Abstract: A self-powered overvoltage protection circuit for a regulated DC-DC converter looks for the onset of a very large input voltage prior to regulation. In response to such a voltage during this interval, it turns on a low side electronic power switching device, in accordance with the voltage at one of the phase node and the regulated voltage output terminal from which the protection circuit derives its power. This provides a bypass path for an overvoltage that would otherwise be coupled from the regulated voltage output terminal to one or more load devices.

Abstract translation: 用于稳压DC-DC转换器的自供电过电压保护电路在调节之前寻找非常大的输入电压的开始。 响应于该间隔期间的这种电压，它根据保护电路从其产生功率的相位节点和调节电压输出端之一处的电压来接通低边电子功率开关装置。 这提供了用于过电压的旁路路径，否则过电压将从调节电压输出端子耦合到一个或多个负载装置。

公开(公告)号：US20030173941A1

公开(公告)日：2003-09-18

申请号：US10100439

申请日：2002-03-18

Applicant: Intersil Americas Inc.

Inventor： Matthew Burdet Harris ,  Robert Haynes Isham

IPC: G05F001/40

CPC classification number: H02M3/156 ,  H02M3/1588 ,  H02M2003/1566 ,  Y02B70/1466

Abstract: A DC-to-DC converter includes a pulse width modulation (PWM) circuit cooperating with at least one power switch for supplying power from a source to a load over a range between a lower limit and an upper limit to thereby control an output voltage for the load. The converter may also include a primary feedback control loop cooperating with the PWM circuit for supplying power to the load between the lower and upper limits based upon the output voltage during normal load transient conditions. The converter may also include at least one override feedback control loop cooperating with the PWM circuit for overriding the primary feedback control loop and supplying power to the load at one of the lower and upper limits based upon the output voltage during a corresponding relatively fast load transient condition. Accordingly, relatively fast load transients can be followed by the converter.

Abstract translation: DC-DC转换器包括与至少一个功率开关配合的脉冲宽度调制（PWM）电路，用于在下限和上限之间的范围内从源向负载供电，从而控制输出电压 负载。 转换器还可以包括与PWM电路配合的主反馈控制回路，用于在正常负载瞬态条件期间基于输出电压向下限和上限之间的负载供电。 转换器还可以包括与PWM电路协作的至少一个覆盖反馈控制环路，用于覆盖主反馈控制回路，并且在相应的相对快速的负载瞬变期间基于输出电压在下限和上限中的一个处向负载供电 条件。 因此，转换器可以跟随相对较快的负载瞬变。