Methods and apparatus for negative output voltage active clamping using a floating bandgap reference and temperature compensation

US10088856B2 · kind B2 · utility

Assignee

• TEXAS INSTRUMENTS INCORPORATED · US

Inventors

• Alvin Xu · 安丰镇, CN
• Qingjie Ma · Shanghai, CN
• Yang Wang · Chandler, US
• Yan He · Shanghai, CN
• Jun Ma · 流花街道, CN
• Zhenghao Cui · Beijing, CN
• Jingwei Xu · Buffalo Grove, US

Key dates

• Filing date: May 5, 2017
• Grant date: Oct 2, 2018
• Expiry date: May 5, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F3/30
• WIPO field: Control
• WIPO sector: Instruments

Abstract

Methods, apparatus, systems and articles of manufacture for negative output voltage active clamping using a floating bandgap reference and temperature compensation are disclosed. An example load switch includes a floating bandgap reference circuit to generate a bandgap reference voltage. A resistor divider is to generate a resistor divider voltage. A temperature compensator to apply a temperature compensation current to the resistor divider to create a temperature compensated resistor divider voltage. A power transistor is to be enabled when the temperature compensated resistor divider voltage is less than the bandgap reference voltage. The example load switch can work under negative output voltage clamping and get better accuracy drain to source clamped voltage of power transistor for inductive load condition.