UM10516
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1 — 27 March 2012
3 of 16
NXP Semiconductors
UM10516
230 V 7 W GU10 buck converter SSL2101 reference board
1. Introduction
This document describes the application and operation of a 230 V 7 W dimmable LED
driver featuring SSL2101. The reference board has a GU10 LED lamp compatible form
factor. The buck converter topology provides a simple and efficient solution for mains
dimmable LED recessed light applications not requiring galvanic isolation.
Remark:
Unless otherwise stated, all voltages are in V.
The total input power (VA) to the board is 230 V/41 mA = 9.4 W. The board is designed to
drive a 5-LED load, delivering an output power of 6.5 W at 415 mA and 15.6 V (DC). The
Power Factor (PF) is 0.9 which give an actual input power of 0.9
9.4 W = 8.5 W. The
resulting efficiency is 76 %. The Total Harmonic Distortion (THD) is 30 %. The board
complies with EMI and safety regulations.
Audible noise requirements of < 25 dBA are realized across the complete dimming range
of currently available dimmers in the market.
The board dimensions are shown in
Figure 1
. The board is designed with the components
allowing enough headroom when the board is inserted into a GU10 lamp base.
The assembled top and bottom board views are shown in
Figure 2
and
Figure 3
.
WARNING
Lethal voltage and fire ignition hazard
The non-insulated high voltages that are present when operating this product, constitute a
risk of electric shock, personal injury, death and/or ignition of fire.
This product is intended for evaluation purposes only. It shall be operated in a designated test
area by personnel qualified according to local requirements and labor laws to work with
non-insulated mains voltages and high-voltage circuits. This product shall never be operated
unattended.
Fig 1.
Dimensions of the reference board
aaa-002431
18 mm
30.8 mm
18.1 mm
8.7 mm
15.3 mm
