LED driver enhances high power reliability

23rd October 2014

Mick Elliott

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Datasheet

NXP Semiconductors SSL5015TE LED Driver Integrated Circuit (IC) is engineered to drive LED lamps for general mains non-dimmable light applications. The high-voltage, integrated controller and MOSFET provides enhanced power functionality with up to 93 percent efficiency. On-chip protection circuits improves reliability in high-power applications such as 18 W T-LEDs or higher power lamps.

The compact solution provides a small PCB footprint, a low Bill of Materials (BOM) and is now available from Mouser Electronics.

The device targets 100VAC or 120VAC systems and boasts an input power factor that is greater than 0.95, with a low Total Harmonic Distortion (THD) of less than 20 percent. Requiring minimal external component count. It provides an intermediate power factor (PF) of greater than 0.7, and a low ripple of less than 5 percent.

It can be configured as a buck converter while drawing only 1.3 mA. The chip can start up directly from the HV pin using an internal high-voltage current source. While the converter is switching, Vcc is supplied through the DVDT pin by a capacitor coupled to the drain pin or by an auxiliary supply. This feature not only simplifies the VCC supply, but it allows designers to incorporate a low-cost, off-the-shelf inductor.

Other features of the device include an integrated switch mode LED driver with 300 VDC power switches, direct PWM current regulation, and fast transient response through peak current mode control. UnderVoltage LockOut (UVLO), OverCurrent Protection (OCP), Internal OverTemperature Protection (OTP) and Brownout protection circuits are also on-chip.

Target lighting applications include retrofit LED lamps and driver modules for LED lighting.