公开(公告)号：US09317054B2

公开(公告)日：2016-04-19

申请号：US14492877

申请日：2014-09-22

Applicant: STMicroelectronics International N.V.

Inventor： Alexandre Pons ,  Karel Napravnik

IPC: G05F1/00 ,  G05F1/575

CPC classification number: G05F1/575

Abstract: A circuit may include a differential amplifier and a feedback network. The feedback network may have a chain of resistance sets coupled in series, with a first end terminal coupled to an output terminal of the differential amplifier and a second end terminal coupled to a power reference terminal of the differential amplifier. Respective nodes may be coupled between successive ones of the resistance sets. A feedback terminal may be coupled to an inverting input terminal of the differential amplifier. A controller may control a set of switches to electrically couple a given node to the feedback terminal. A first resistance set of the chain adjacent the first end terminal may be two resistance subsets coupled in series, with an intermediate node coupled therebetween. A programmable current generator may have a current output coupled to the intermediate node and may produce a controlled current flowing at the current output terminal.

Abstract translation: 电路可以包括差分放大器和反馈网络。 反馈网络可以具有串联耦合的电阻组，其中第一端子耦合到差分放大器的输出端子，以及耦合到差分放大器的功率参考端子的第二端子端子。 相应的节点可以在连续的电阻集合中耦合。 反馈端子可以耦合到差分放大器的反相输入端子。 控制器可以控制一组开关以将给定节点电耦合到反馈端子。 邻近第一端子的链的第一电阻组可以是串联耦合的两个电阻子集，其间连接有中间节点。 可编程电流发生器可以具有耦合到中间节点的电流输出并且可以产生在当前输出端子处流动的受控电流。

公开(公告)号：US09170591B2

公开(公告)日：2015-10-27

申请号：US14018967

申请日：2013-09-05

Applicant: STMicroelectronics International N.V.

Inventor： Alexandre Pons

IPC: G05F1/571 ,  G05F1/56

CPC classification number: G05F1/56 ,  G05F1/575

Abstract: A circuit including a low drop-out regulator (LDO) has a current control loop configured and connected to detect whether an external capacitor is connected to the output of the LDO. The current control loop includes a differential amplifier, a current source capable to output different reference currents and a small MOS transistor. The circuit may be operated in an output capacitor detection mode when started and in a regulated voltage source mode otherwise. In the output capacitor detection mode, the small MOS transistor is driven by the differential amplifier and drives the LDO's power MOS transistor depending on a difference between a current through the small MOS transistor and the reference current output by the current source. Components of the current control loop may be used during regulated voltage source mode for short circuit protection.

Abstract translation: 包括低压差稳压器（LDO）的电路具有配置和连接的电流控制回路，以检测外部电容器是否连接到LDO的输出端。 电流控制回路包括差分放大器，能够输出不同参考电流的电流源和小型MOS晶体管。 电路可以在启动时以输出电容器检测模式工作，否则在稳压电源模式下工作。 在输出电容检测模式下，小型MOS晶体管由差分放大器驱动，并根据通过小MOS晶体管的电流与电流源输出的参考电流之间的差异驱动LDO的功率MOS晶体管。 电流控制回路的组件可在调节电压源模式下用于短路保护。

公开(公告)号：US20150084609A1

公开(公告)日：2015-03-26

申请号：US14492877

申请日：2014-09-22

Applicant: STMICROELECTRONICS INTERNATIONAL N.V.

Inventor： Alexandre Pons ,  Karel Napravnik

IPC: G05F1/575

CPC classification number: G05F1/575

Abstract: A circuit may include a differential amplifier and a feedback network. The feedback network may have a chain of resistance sets coupled in series, with a first end terminal coupled to an output terminal of the differential amplifier and a second end terminal coupled to a power reference terminal of the differential amplifier. Respective nodes may be coupled between successive ones of the resistance sets. A feedback terminal may be coupled to an inverting input terminal of the differential amplifier. A controller may control a set of switches to electrically couple a given node to the feedback terminal. A first resistance set of the chain adjacent the first end terminal may be two resistance subsets coupled in series, with an intermediate node coupled therebetween. A programmable current generator may have a current output coupled to the intermediate node and may produce a controlled current flowing at the current output terminal.

Abstract translation: 电路可以包括差分放大器和反馈网络。 反馈网络可以具有串联耦合的电阻组，其中第一端子耦合到差分放大器的输出端子，以及耦合到差分放大器的功率参考端子的第二端子端子。 相应的节点可以在连续的电阻集合中耦合。 反馈端子可以耦合到差分放大器的反相输入端子。 控制器可以控制一组开关以将给定节点电耦合到反馈端子。 邻近第一端子的链的第一电阻组可以是串联耦合的两个电阻子集，其间连接有中间节点。 可编程电流发生器可以具有耦合到中间节点的电流输出并且可以产生在当前输出端子处流动的受控电流。