Volume 22, Issue 3 (JIAEEE Vol.22 No.3 2025)                   Journal of Iranian Association of Electrical and Electronics Engineers 2025, 22(3): 0-0 | Back to browse issues page

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Sadeghi M R, Ebadi M. Providing a circuit for detecting and interrupting the operation of ‎the LED driver for street lighting in Hiccup mode. Journal of Iranian Association of Electrical and Electronics Engineers 2025; 22 (3)
URL: http://jiaeee.com/article-1-1738-en.html
Providing a circuit for detecting and interrupting the operation of ‎the LED driver for street lighting in Hiccup mode
Mohammad Reza Sadeghi , Mazdak Ebadi *
Arak University
Abstract:   (17 Views)
Hiccup phenomenon in LED driver occurs when some LEDs fail in a string. This causes the current to increase too much and the driver detects an overcurrent fault. As a result, the output is interrupted and restarts after one to two seconds. So the current increases again and this action is repeated until the end of the working day. This driver only hiccups once every two seconds. In addition to causing inconvenience for the people around, this phenomenon increases the possibility of damage to the driver. In this article, a circuit is proposed that detects the phenomenon of hiccup and permanently disables the driver after hiccup a few times. Due to the need to be small and economical, the proposed circuit is designed without a current sensor and a microcontroller. The working principle here is based on detecting the fault of the LED string by the op-amp and transmitting the error signal to the counter, which interrupts the circuit in less than 10 hiccups. The purpose of using the counter is to avoid untimely operation of the system in transient situations such as start-up time or electrical fluctuations. Such a scheme can be easily extended to circuits containing several parallel LED strings. The proposed circuit has been implemented on a 35 watts/ 48 volts led light. The experimental results show well that failing one or two LEDs in the string activates the protection and turns off the driver until the end of the working day.
 
Keywords: LED street light, Flyback converter, Hiccup Mode, LED driver
     
Type of Article: Research | Subject: Power
Received: 2024/06/29 | Accepted: 2025/02/3
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