LC5555LD - Single-Stage Power Factor Corrected High Efficiency Non-Isolated Buck LED Driver
Sanken
Download the LC5555LD datasheet PDF.
This datasheet also covers the LC5550LD variant, as both devices belong to the same single-stage power factor corrected high efficiency non-isolated buck led driver family and are provided as variant models within a single manufacturer datasheet.
General Description
LC5550LD series are PWM and quasi-resonant topology non-isolated buck LED driver ICs.
They incorporate separate controller and power MOSFET chips, and are designed for input capacitorless applications.
The controller adapts the average current control method for realizing high power factors.
Key Features
PWM and quasi-resonant topology.
Integrated on-time control circuit (it realizes high power factor by average current control).
Integrated soft-start circuit (reduces power stress during start-up on the incorporated power MOSFET and output rectifier).
Integrated bias assist circuit (improves startup performance, suppresses VCC voltage droop during operation, and allows use of low-rated ceramic capacitor on VCC pin).
Full PDF Text Transcription for LC5555LD (Reference)
Note: Below is a high-fidelity text extraction (approx. 800 characters) for
LC5555LD. For precise diagrams, and layout, please refer to the original PDF.
LC5550LD Series Single-Stage Power Factor Corrected High Efficiency Non-Isolated Buck LED Driver Features and Benefits • PWM and quasi-resonant topology • Integrated on-t...
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tures and Benefits • PWM and quasi-resonant topology • Integrated on-time control circuit (it realizes high power factor by average current control) • Integrated soft-start circuit (reduces power stress during start-up on the incorporated power MOSFET and output rectifier) • Integrated bias assist circuit (improves startup performance, suppresses VCC voltage droop during operation, and allows use of low-rated ceramic capacitor on VCC pin) • Integrated Leading Edge Blanking (LEB) circuit • Integrated maximum on-time limit circuit • Protection features: ▫ Overcurrent protection (OCP): pulse-by-pulse ▫ Overvoltage protection
LC5555LD Datasheet
