Primary-Side-Regulation PWM Controller for LED Illumination

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Overview

This third-generation Primary-Side-Regulation (PSR) and highly integrated PWM controller provides features to enhance the performance of LED illumination.
The proprietary topology, TRUECURRENT®, enables precise CC regulation and simplified circuit for LED illumination applications. The result is lower-cost and smaller LED lighting compared to a conventional design or a linear transformer.
To minimize standby power consumption, the proprietary green-mode function provides off-time modulation to linearly decrease PWM frequency with cycle skipping under light-load conditions. Green mode assists the power supply in meeting the power conservation requirements. By using the FL663, LED illumination can be implemented with few external components and minimized cost.

  • Lighting
  • LED Lighting – Low Power – Non dimming
  • LED Lighting – Mid Power – Non dimming
  • Low Standby Power: < 30 mW
  • High-Voltage Startup
  • Few External Component Counts
  • Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry
  • Green-Mode: Linearly-Decreasing PWM Frequency with Cycle Skipping
  • Fixed PWM Frequency at 50 kHz and 33 kHz with Proprietary Frequency Hopping to Solve EMI Problems
  • Peak-Current-Mode Control in CV Mode
  • Cycle-by-Cycle Current Limiting
  • VDD Over-Voltage Protection (OVP)
  • VDD Under-Voltage Lockout (UVLO)
  • Adjustable Brownout Detector
  • Gate Output Maximum Voltage Clamped at 15 V
  • Thermal Shutdown (TSD) Protection
  • Available in the 8-Lead SOIC Package

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FL663MX

Last Shipments

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

PSR PFC Flyback

50 VDC

500 VDC

18 VGATE

200/60 ns - rise/fall time

50

Price N/A

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