RediSem Ltd. Science Park Shatin Hong Kong Tel. +852 2607 4141 Fax. +852 2607 4140 Careers | Contact © Copyright 2025 RediSem Ltd.
RED2521 is an advanced LED controller IC for high efficiency low-cost LLC converters with bipolar transistors and integrated PFC, intended for single stage PFC LED drivers without flicker and CC LED drivers up to 100W.
• Advanced LED Controller IC for high efficiency low-cost LLC converters with bipolar transistors and integrated PFC • Improved CC regulation for zero flicker • PSR - +/-5% Primary Side Regulation of LED current and voltage with no flicker • 50% duty cycle, variable frequency control of resonant half-bridge • Automatic dead-time control and capacitive mode protection • Protection modes: a. Overload b. No-Load c. Internal Over-temperature d. External Over-temperature (NTC) • Low output capacitance allows live LED connection • Very low output current ripple < 2% • Small SO8 IC package
Datasheet  
Key Features
Order Details
• Code RED2521AD-TR13 • Package SO8 Tape & Reel
•	50W 1200mA LED driver (2159kB) •	50W 1200mA LED driver (2159kB) Reference Design  Check Application Notes Check Application Notes Order Order
•	RED2521  (463kB)   •	RED2521  (463kB)   •	60W 1500mA LED driver  (2170kB) •	60W 1500mA LED driver  (2170kB)       LED Driver ICs
RediSem Ltd. Science Park Shatin Hong Kong Tel. +852 2607 4141 Fax. +852 2607 4140 Careers | Contact © Copyright 2025 RediSem Ltd.
RED2521 is an advanced LED controller IC for high efficiency low- cost LLC converters with bipolar transistors and integrated PFC, intended for single stage PFC LED drivers without flicker and CC LED drivers up to 100W.
• Advanced LED Controller IC for high efficiency low-cost LLC converters with bipolar transistors and integrated PFC • Improved CC regulation for zero flicker • PSR - +/-5% Primary Side Regulation of LED current and voltage with no flicker • 50% duty cycle, variable frequency control of resonant half-bridge • Automatic dead-time control and capacitive mode protection • Protection modes: a. Overload b. No-Load c. Internal Over-temperature d. External Over-temperature (NTC) • Low output capacitance allows live LED connection • Very low output current ripple < 2% • Small SO8 IC package
Key Features
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