Fairchild Semiconductor’s New Low-Power LED Drivers with Integrated MOSFETs Help Designers Reduce Board Space and Design Times

LED Driver Expansion Offers Increased System Reliability and Improved LED Performance

As the LED lighting market continues to grow, designers need solutions that meet limited circuit board footprints, meet circuit protection and system reliability demands, and simplify supply chain logistics, all while maintaining global energy regulation compliance. To help designers meet these requirements, Fairchild Semiconductor (NYSE: FCS) expanded its LED lighting driver solutions portfolio to include an optimized low-power offering.
 
As a MOSFET technology leader, Fairchild continues to offer the latest in LED lamp drivers. The FLS0116, FLS3217 and FLS3247 with integrated MOSFET and power factor correction (PFC) are optimally designed for low-power LED applications. With the addition of the integrated power MOSFET, these devices help to minimize board space and overall component count while decreasing design time. Equipped with cycle-by-cycle current limiting and integrated protection features such as over temperature protection (OTP) and under-voltage lockout (UVLO) these devices help to significantly improve LED lamp system reliability.

The FLS0116 utilizes an “adopted digital” technique that automatically detects AC and DC input voltage conditions, enabling and disabling PFC functions while also offering programmable oscillation frequency and analog dimming and soft-start functions. The FLS3217 and FLS3247 with primary-side regulation (PSR) can support isolated flyback converter and non-isolated DC-DC converter applications. Additionally, the devices regulate accurate output current by using a  precise constant-current control (CC) function and increase efficiency for an easier design with linear frequency control.

Fairchild’s complete LED solutions for low-, mid-, and high-power designs reduce external components to save space, provide high reliability, and enhance overall system efficiency. Featuring integrated components in a single IC, Fairchild utilizes proven, highly efficient and effective technologies to power ranges that are 1W and higher. With multiple topology offerings that provide energy efficient solutions, Fairchild helps designers achieve high power factor and low total harmonic distortion while meeting global energy regulations. Additionally, the company provides the system expertise and design resources needed to help designers get their LED IC-based products to market faster.

 
Features and Benefits:

FLS0116
•    Built-in MOSFET (1A/550V)
•    Built-in HV supplying circuit for self biasing
•    Low operating current of 0.85mAa (typical)
•    Current-sense pin open protection
•    No transformer or electrolytic capacitor required for reduced component counts
•    Digital PFC function (>0.9)
•    Automatic, convertible AC-DC and DC-DC Inputs
•    Analog dimming function
•    Programmable LED current and frequency
FLS3217/FLS3247
•    Built-in MOSFET (FLS3217:1A/700V or FLS3247:4A/700V)
•    Open/short LED protection
•    Low operating current: 5mA (typical)
•    No input electrolytic capacitor required for reduced component counts
•    High PF (>0.9)
•    Low THD (Class C)
•    Tight CC tolerance: <±5% in system

Fairchild offers a proven, total driver solution for low-, mid- and high- power LED lighting applications. As an expansion to the Fairchild LED total solution family, these devices are included with the FL7730 and FL7732 LED drivers for TRIAC and analog dimming and non-dimming applications. All devices in this complete portfolio offer designers a total solution package to the LED design needs with exclusive access to Fairchild’s Excel based LED Driver Design Tools,application notes, reference designs and evaluation boards.
 

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