Invention Grant
- Patent Title: Multi-string LED current balancing circuit with fault detection
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Application No.: US17071946Application Date: 2020-10-15
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Publication No.: US11438983B2Publication Date: 2022-09-06
- Inventor: Garrett Warren Satterfield , Collin Philip Wells
- Applicant: TEXAS INSTRUMENTS INCORPORATED
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent Ray A. King; Charles A. Brill; Frank D. Cimino
- Main IPC: H05B45/35
- IPC: H05B45/35 ; H05B45/46 ; H05B47/23 ; H05B45/52 ; H05B45/54
Abstract:
A lighting device circuit comprising: a reference LED string, a mirror LED string coupled in parallel to the reference LED string, an operational amplifier based current mirror circuit coupled to the reference LED string and to the mirror LED string, and a window comparator circuit that includes only a single input that is coupled to a fault sense node. The fault sense node directly connects to a drain node of a transistor within the operational amplifier based current mirror and a LED within the mirror LED string.
Public/Granted literature
- US20210029801A1 MULTI-STRING LED CURRENT BALANCING CIRCUIT WITH FAULT DETECTION Public/Granted day:2021-01-28
Information query
