公开(公告)号：US11194355B2

公开(公告)日：2021-12-07

申请号：US14505054

申请日：2014-10-02

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Navin Venkata Kommaraju ,  Rahul Prakash ,  Chintan Trehan

IPC: G05F1/12 ,  G05F1/46

Abstract: A circuit includes an output current circuit that employs a regulated voltage to provide an output voltage to drive a load current through an output load resistor. A load resistance sensor (LRS) senses the resistance of the output load resistor based on the output voltage and the load current. A controller provides a sense voltage control command to set the regulated voltage to an initial sense voltage during a sense mode. The initial sense voltage adjusts the output voltage of the output current circuit and enables the LRS to sense the resistance of the output load resistor at a given setting of the load current. The controller provides a clamp control command based on the sensed resistance of the output load resistor to set the regulated voltage to a fixed regulated voltage during an operation mode. The fixed regulated voltage enables the output current circuit to supply a predetermined maximum load current to the output load resistor at a predetermined minimum setting of the output voltage.

公开(公告)号：US20150097545A1

公开(公告)日：2015-04-09

申请号：US14505054

申请日：2014-10-02

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Navin Venkata Kommaraju ,  Rahul Prakash ,  Chintan Trehan

IPC: G05F1/12

CPC classification number: G05F1/12 ,  G05F1/46

Abstract: A circuit includes an output current circuit that employs a regulated voltage to provide an output voltage to drive a load current through an output load resistor. A load resistance sensor (LRS) senses the resistance of the output load resistor based on the output voltage and the load current. A controller provides a sense voltage control command to set the regulated voltage to an initial sense voltage during a sense mode. The initial sense voltage adjusts the output voltage of the output current circuit and enables the LRS to sense the resistance of the output load resistor at a given setting of the load current. The controller provides a clamp control command based on the sensed resistance of the output load resistor to set the regulated voltage to a fixed regulated voltage during an operation mode. The fixed regulated voltage enables the output current circuit to supply a predetermined maximum load current to the output load resistor at a predetermined minimum setting of the output voltage.

Abstract translation: 电路包括输出电流电路，其采用调节电压来提供输出电压以驱动负载电流通过输出负载电阻器。 负载电阻传感器（LRS）根据输出电压和负载电流检测输出负载电阻的电阻。 控制器提供感测电压控制命令，以在感测模式期间将调节电压设置为初始感测电压。 初始感测电压调节输出电流电路的输出电压，并使LRS能够在给定的负载电流设置下感测输出负载电阻的电阻。 控制器基于感测到的输出负载电阻的电阻提供钳位控制命令，以在操作模式期间将调节电压设置为固定的调节电压。 固定的调节电压使得输出电流电路能够在输出电压的预定最小设置下向输出负载电阻器提供预定的最大负载电流。