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Driver ICs deliver enhanced LED lamp power up to 18W

Posted: 02 Jun 2014 ?? ?Print Version ?Bookmark and Share

Keywords:LED? MOSFET? NXP? buck converter? driver IC?

NXP Semiconductors N.V. has rolled out a range of high-voltage ICs with an integrated MOSFET for driving LED lamps in non-dimmable lighting applications up to 18W.

The devices have a supply current of 1.3mA. They operate in Boundary Conduction Mode (BCM) with peak current modulation, providing an input power factor correction. The ICs are typically configured to a buck converter. It can start up directly from the HV pin using an internal high-voltage current source. When the converter is switching, VCC is supplied through the DVDT pin by a capacitor coupled to the DRAIN pin or by an auxiliary supply.

NXP driver ICS

Figure 1: The IC combines LED controller and MOSFET for up to 18W lamp power. Source: NXP

They are housed in a compact HSO8 package, incorporating an exposed pad to enhance the thermal capability for high-power applications, like T-LEDs or higher power lamps.

The SSL5015 incorporate a 300V power switch, and is designed for 100V or 120V input applications. The SSL5018, meanwhile, has a 600V power switch with input voltages up to 230V. The controllers are available across multiple markets, with the SSL5015 optimised for U.S. and Japan, and the SSL5018 for Europe and Asia.

Block diagram

Figure 2: NXP SSL5015/SSL5018 block diagram.

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