ON Semiconductor Introduces two New LED Drivers

Published:2011/11/28 21:10:00 Author:Phyllis From:SeekIC

ON Semiconductor recently has introduced two new LED drivers: the NCL30051 and the NCL30160 for designers to optimize their solutions for automotive, industrial and general lighting applications.

The NCL30051 is a dedicated LED power supply IC which can deliver a constant voltage to a step down DC/DC converter/LED driver. While the NCL30160 is a dimmable constant current step down (buck) led driver for high power LEDs. The combination of the NCL30051 and the NCL30160 provide an ideal solution for high-brightness LED driver applications where space is limited and high efficiency is important.

The NCL30051, which combines a critical conduction mode, PFC controller and a half bridge resonant controller with a built in 600V driver, is optimized for offline power supply applications. Its half-bridge stage operates at a fixed frequency and regulation is achieved by adjusting the PFC stage output voltage. The device integrates open feedback loop protection, plus PFC overvoltage and undervoltage detection mechanisms, as well as an adjustable frequency oscillator which can be set at up to 75 kHz.

The NCL30160 is designed to take the constant voltage delivered by the NCL30051 enabled power supply and step down the voltage to provide a constant current across the LED string. With up to 98% efficiency are achieved by utilizing the low 55mΩ internal MOSFET, the solution has the ability to operate at 100 percent duty cycle.

This constant current device operates with an input voltage range from 6.3V to 40V. High switching frequencies up to 1.4MHz allow the use of smaller external components helping to minimize board size and cost. The hysteretic control of the NCL30160 provides fast response during load transients and eliminates the need for small signal control loop compensation components.

The NCL30051 and NCL30160 ICs help to simplify power circuit designs with the minimal number of external components needed. This architecture allows the chipset to be incorporated into more compact and cost-effective LED Lighting power supplies for general lighting applications such as outdoor lighting for street lights and parking lights, and automotive lighting.

Both the NCL30051 and the NCL30160 have operating junction temperature ranges of -40 ℃ to +125 ℃.

About ON Semiconductor

ON Semiconductor Corporation designs, manufactures, and markets a portfolio of semiconductor components that addresses the design needs of electronic systems and products worldwide. Its product lines include automotive and power group, computing and consumer products, digital and mixed-signal products group, and standard products. The company sells its products to original equipment manufacturers, distributors, and electronic manufacturing service providers.

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