公开(公告)号：US20150015333A1

公开(公告)日：2015-01-15

申请号：US14291640

申请日：2014-05-30

申请人： Fairchild Semiconductor Corporation

发明人： Hrvoje Jasa ,  Andrew M. Jordan

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  G01R19/0023 ,  G01R19/16542 ,  H03F2200/228 ,  H03F2203/45528 ,  H03F2203/45564 ,  H03F2203/45604

摘要： An apparatus comprises a differential amplifier circuit and a current source. The differential amplifier circuit is configured to receive a voltage at an input, wherein the differential amplifier circuit generates an output voltage having a magnitude proportional to the received voltage over a voltage range to be measured at a specified output common mode voltage. The current source is electrically connected to an input of the differential amplifier circuit and is configured to subtract a midpoint of a voltage range of the battery voltage to be measured at the input of the differential amplifier, wherein a circuit supply voltage provided to the differential amplifier circuit and the current source is less than the voltage at the input.

摘要翻译： 一种装置包括差分放大器电路和电流源。 差分放大器电路被配置为在输入处接收电压，其中差分放大器电路产生具有与在指定输出共模电压下测量的电压范围上的接收电压成比例的幅度的输出电压。 电流源电连接到差分放大器电路的输入，并且被配置为在差分放大器的输入端减去要测量的电池电压的电压范围的中点，其中提供给差分放大器的电路电源电压 电路和电流源小于输入端的电压。

公开(公告)号：US20150130433A1

公开(公告)日：2015-05-14

申请号：US14535617

申请日：2014-11-07

申请人： Fairchild Semiconductor Corporation

发明人： Hrvoje Jasa ,  Steven Macaluso

IPC分类号： G05F1/625

CPC分类号： G05F1/561 ,  G05F1/66 ,  G06F1/30 ,  H03K17/0822 ,  H03K2017/0806

摘要： Load switch supply circuits and methods are provided that allow a load switch to maintain power delivery without having the load switch encounter thermal or power overload conditions. In an example, a load switch supply circuit can include a multiplier circuit configured to receive a first representation of voltage across a load switch and a representation of current provided by the load switch and to provide a representation of power dissipated by the load switch, and a control amplifier configured to compare the representation of power dissipated by the load switch to a power threshold and to adjust a control terminal of the load switch to avoid cycling the load switch to an off state due to thermal overload or power overload conditions.

摘要翻译： 提供负载开关电源电路和方法，允许负载开关在不使负载开关遇到热或电力过载条件的情况下维持供电。 在一个示例中，负载开关电源电路可以包括被配置为接收负载开关上的电压的第一表示和由负载开关提供的电流的表示并且提供由负载开关消耗的功率的表示的乘法器电路，以及 控制放大器，其被配置为将由负载开关消耗的功率的表示与功率阈值进行比较，并且调整负载开关的控制端子，以避免由于热过载或电力过载条件而使负载开关循环到断开状态。

公开(公告)号：US09362874B2

公开(公告)日：2016-06-07

申请号：US14291640

申请日：2014-05-30

申请人： Fairchild Semiconductor Corporation

发明人： Hrvoje Jasa ,  Andrew M. Jordan

IPC分类号： H03F3/45 ,  G01R19/00 ,  G01R19/165

CPC分类号： H03F3/45475 ,  G01R19/0023 ,  G01R19/16542 ,  H03F2200/228 ,  H03F2203/45528 ,  H03F2203/45564 ,  H03F2203/45604

摘要： An apparatus comprises a differential amplifier circuit and a current source. The differential amplifier circuit is configured to receive a voltage at an input, wherein the differential amplifier circuit generates an output voltage having a magnitude proportional to the received voltage over a voltage range to be measured at a specified output common mode voltage. The current source is electrically connected to an input of the differential amplifier circuit and is configured to subtract a midpoint of a voltage range of the battery voltage to be measured at the input of the differential amplifier, wherein a circuit supply voltage provided to the differential amplifier circuit and the current source is less than the voltage at the input.

摘要翻译： 一种装置包括差分放大器电路和电流源。 差分放大器电路被配置为在输入处接收电压，其中差分放大器电路产生具有与在指定输出共模电压下测量的电压范围上的接收电压成比例的幅度的输出电压。 电流源电连接到差分放大器电路的输入，并且被配置为在差分放大器的输入端减去要测量的电池电压的电压范围的中点，其中提供给差分放大器的电路电源电压 电路和电流源小于输入端的电压。