A wide range constant current LED driver with improved power quality and zero standby

Jha, Aman; Kumar, Manoj

doi:10.1109/etechnxt.2018.8385327

Cited by 9 publications

(2 citation statements)

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“…The filter capacitor can be used to stabilize the output voltage of the SMPS. When the load was changed, the current ripple magnitude was related to the equivalent series resistor (ESR) of the filter capacitor [18]; the low ESR can reduce the current ripple when the load changes. The output filter capacitor calculation can be expressed as [19]:…”

Section: Output Filter Capacitormentioning

confidence: 99%

“…The filter capacitor can be used to stabilize the output voltage of the SMPS. When the load was changed, the current ripple magnitude was related to the equivalent series resistor (ESR) of the filter capacitor [ 18 ]; the low ESR can reduce the current ripple when the load changes. The output filter capacitor calculation can be expressed as [ 19 ]:

where △ V ou t is the peak-to-peak value of the output voltage, the and ncp is the number of the internal clock cycle for the PWM control chip needed by the control loop to reduce the duty cycle from maximum to minimum value.…”

Section: Design Consideration Of Qr-flyback Convertermentioning

confidence: 99%

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Development and Implementation of LED Street Lights with Bright and Extinguishable Controls and Power Converters

2023

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This study developed and implemented a driving power supply for light-emitting diode (LED) array streetlamps. The power stage was a quasi-resonant (QR)-flyback converter, its input power was the alternating-current power, and the LED array streetlamp was driven by the direct-current output power. The developed QR-flyback converter was operated in discontinuous conduction mode, and the pulse-width modulation (PWM) control chip was used to switch and conduct at the resonant valley of the drain-source voltage on the metal-oxide-semiconductor field-effect transistor (MOSFET) switch to reduce the switching loss. Moreover, the PWM control chip had a disable function, which was connected with a bright and extinguishable control circuit, and the high/low voltage level signal output by the Arduino development board can be used to control the output power of the QR-flyback converter, achieving bright and extinguishable controls for the LED array streetlamp.

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Section: Output Filter Capacitormentioning

confidence: 99%

“…The filter capacitor can be used to stabilize the output voltage of the SMPS. When the load was changed, the current ripple magnitude was related to the equivalent series resistor (ESR) of the filter capacitor [ 18 ]; the low ESR can reduce the current ripple when the load changes. The output filter capacitor calculation can be expressed as [ 19 ]:

Section: Design Consideration Of Qr-flyback Convertermentioning

confidence: 99%