Single-Phase Active LED Driver with common cathode DC-DC Buck Cell with Constant Output Current without Electrolytic Capacitor

Pallapati, Ramesh Babu; Chinthamalla, Ramulu; Guddanti, Leela Prakash

doi:10.1109/npec52100.2021.9672518

Cited by 7 publications

(2 citation statements)

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“…However,the topologies stated in Camponogara et al 12 and Fang et al 20 are only weakly coupled, which increases the complexity of the control approach. Another

n_{χ}

‐power stage (PS) driver design based on a unidirectional power processing technique was proposed in earlier studies 21–24 . The DC‐DC stage processes

normalΔ p

only once in this design, as illustrated in Figure 4, which is more efficient than the bidirectional counterpart.…”

Section: Introductionmentioning

confidence: 99%

“…Another n χ -power stage (PS) driver design based on a unidirectional power processing technique was proposed in earlier studies. [21][22][23][24] The DC-DC stage processes Δp only once in this design, as illustrated in Figure 4, which is more efficient than the bidirectional counterpart. However, extra semiconductor switches are necessary to ensure an efficient input power distribution.…”

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confidence: 99%

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Electrolytic capacitor‐less reduced power processing single‐phase LED driver with power decoupling using split capacitor

Pallapati

Chinthamalla

2023

Circuit Theory & Apps

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Summary Light emitting diode (LED) driver systems are now moving toward reduced processing power to improve conversion efficiency in indoor and outdoor applications. LED drivers connected to a single‐phase supply must meet the requirements for power factor correction with lower input current harmonics to maintain the alternating current (AC) power grid's quality and maintain a constant current through the LED load to eliminate the flickering effect in the light output. An LED driver is required to fulfill these requirements. In this paper, a new reduced processing power LED driver is proposed. By splitting the output capacitor into two capacitors and with the help of hardware design, the processing power can be reduced by using fewer semiconductors than in earlier designs. The proposed driver employs a simple ripple cancellation control approach to eliminate the 100 Hz ripple in the LED load current. Using this principle, an LED driver was designed and tested. The experimental results demonstrated that the proposed LED driver achieved an input power factor close to unity with lower input current harmonics and 92.5% of peak efficiency when operating at full power.

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“…However,the topologies stated in Camponogara et al 12 and Fang et al 20 are only weakly coupled, which increases the complexity of the control approach. Another

n_{χ}

‐power stage (PS) driver design based on a unidirectional power processing technique was proposed in earlier studies 21–24 . The DC‐DC stage processes