US Patent Application 17826822. QUICK TURN OFF OF CONTACTOR SYSTEM DURING POWER OFF simplified abstract

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QUICK TURN OFF OF CONTACTOR SYSTEM DURING POWER OFF

Organization Name

TEXAS INSTRUMENTS INCORPORATED

Inventor(s)

Priyank Anand of Bangalore (IN)

Ashish Ojha of Bangalore (IN)

Krishnamurthy Shankar of Bangalore (IN)

Venkatesh Guduri of Bangalore (IN)

QUICK TURN OFF OF CONTACTOR SYSTEM DURING POWER OFF - A simplified explanation of the abstract

This abstract first appeared for US patent application 17826822 titled 'QUICK TURN OFF OF CONTACTOR SYSTEM DURING POWER OFF

Simplified Explanation

The patent application describes a system for quickly turning off a contactor controller when the supply voltage is below a certain threshold. This system ensures that the quick-turn-off (QTO) function is not affected when there is sufficient supply voltage available.

  • The contactor controller disables the high-side (HS) clamp when there is a loss of supply voltage (VM loss).
  • The output voltage is used to generate a low-side (LS) clamp current, which can be adjusted to achieve the desired QTO voltage.
  • In another example, the HS clamp is disabled and the gate of a LS field-effect transistor (FET) is charged only when the output voltage increases above a power-off QTO threshold.
  • The QTO voltage is determined by a voltage detection and comparison circuit of the contactor controller.


Original Abstract Submitted

Examples of contactor controllers, systems and methods enable quick-turn-off (QTO) using an output voltage of a contactor controller when its supply voltage is below a threshold but does not interfere with QTO when sufficient supply voltage is available. In an example, when VM loss occurs, a high-side (HS) clamp of a contactor controller is disabled, and a low-side (LS) clamp current is generated using the output voltage. The LS clamp current may be adjusted to achieve a desired QTO voltage. In another example, a HS clamp is disabled and the charging of the gate of a LS field-effect transistor (FET) is enabled only when the output voltage increases above a power-off QTO threshold (less than the LS clamp voltage); the QTO voltage is set by a voltage detection and comparison circuit of the contactor controller.

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