SSL8516BT Datasheet, PDF (1/35 Pages) NXP Semiconductors – Greenchip PFC and flyback controller

SSL8516BT
Greenchip PFC and flyback controller
Rev. 1 — 26 May 2015
Product data sheet
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.