Single-stage PFC with Primary-Side CC, TRIAC-dimmable LED Driver IC
Power Integrations has published a new reference design for a 25-watt LED T8 tube ballast power supply. With an efficiency better than 91%, the DER-287 design also meets commercial requirements for power factor (PF greater than 0.9) and harmonic distortion (EN61000-3-2 Class C).
Figure 1. Typical Application Schematic
LinkSwitch-PH dramatically simplifies implementation of LED drivers requiring Power Factors greater than 0.9, TRIAC dimming, and high efficiency. This highly integrated controller introduces a new control technique that provides very high power factor and accurate output current control, and eliminates passive circuitry required for power factor correction, optocoupler and secondary current control circuitry.
Each device incorporates a 725V power MOSFET, a continuous-mode PWM controller, a high voltage switched current source for self biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry into a monolithic IC.
Product Highlights
Dramatically Simplifies Off-line LED Drivers
Single-stage power factor correction and accurate constant current (CC) output
Flicker-free, phase-controlled TRIAC dimming
Eliminates optocoupler and all secondary current control circuitry
Eliminates all control loop compensation circuitry
Simple primary-side PWM dimming interface
Universal input voltage range
Enables designs that are electrolytic-free
Accurate and Consistent Performance
Fast start-up time
Compensates for transformer inductance tolerances
Compensates for line input voltage variations
Frequency jittering greatly reduces EMI filter size and costs
Advanced Protection and Safety Features
Auto-restart for short circuit protection
Open circuit fault detection mode
Automatic thermal shutdown or restart with hysteresis
Meets high voltage creepage requirement between DRAIN and all other signal pins both on PCB and at package
EcoSmart® - Energy-Efficiency Technology
Low standby power remote ON/OFF feature (< 50 mW at 230 VAC)
No current sense resistors - maximizes efficiency
High efficiency operation, >85% achievable
Green Package
Halogen free and RoHS compliant package
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A proposito di questa azienda:
Power Integrations is the leading supplier of high-voltage analog integrated circuits for energy-efficient power conversion. The company’s innovative technology enables compact, energy-efficient power supplies in a wide range of electronic applications, including LED lighting, cell phone chargers, computers, LCD TVs, DVD players, set-top boxes, home appliances, telecom networking equipment, and many others.
Informazioni sull'azienda:
Nome Azienda:
Power Integrations, Inc.
indirizzo:
5245 Hellyer Avenue
città:
San Jose
provincia:
CA
ZIP:
95138
paese:
U.S.A.
Numero di telefono:
+1-408-4149200
FAX:
+1-408-4149201
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