SSL8516BT datasheet(1/35 Pages) PHILIPS

Part #	SSL8516BT

Description	Greenchip PFC and flyback controller

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Manufacturer	PHILIPS [NXP Semiconductors]

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1.

General description

The GreenChip is the latest generation of green Switched Mode Power Supply (SMPS)

controller ICs. The SSL8516BT combines a controller for Power Factor Correction (PFC)

and a flyback controller. Its high level of integration enables cost-effective LED lighting

application power supply design using a very low number of external components.

The PFC operates in Quasi-Resonant (QR) or Discontinuous Conduction Mode (DCM),

with valley switching.

The specially built-in green functions provide high efficiency at all power levels. At high

power levels, the flyback operates in QR mode or DCM with valley detection. At medium

power levels, the flyback controller switches to Frequency Reduction (FR) mode and limits

the peak current to an adjustable minimum value. In low-power mode, the PFC switches

off to maintain high efficiency. At very low power levels, when the flyback switching

frequency drops to below 25 kHz, the flyback converter switches to burst mode. During

the non-switching phase of the burst mode, the internal IC supply current is minimized to

optimize efficiency further. Valley switching is used in all operating modes.

The advanced burst mode ensures high efficiency at low power and good standby power

performance while minimizing audible transformer noise.

The SSL8516BT is a Multi-Chip Module (MCM), containing two chips. The proprietary

high-voltage BCD800 process makes direct start-up possible from the rectified universal

mains voltage in an effective and green way. The second low voltage Silicon-On-Insulator

(SOI) is used for accurate, high-speed protection functions and control.

The SSL8516BT enables easy design of highly efficient and reliable LED lighting

application power supplies between 25 W and 300 W.

LED drivers in particular benefit from the high level of integration. The IC meets the

lighting class C requirements on mains current harmonics as specified by IEC 61000-3-2

over a wide input voltage range and a wide output power range.

Remark: All values in this document are typical values unless otherwise stated.

SSL8516BT

Greenchip PFC and flyback controller

Rev. 1 — 26 May 2015

Product data sheet

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