UM10341
SSL2101 12 W mains dimmable LED driver
Rev. 2 — 3 February 2011
User manual
Document information
Info
Keywords
Abstract
Content
SSL2101, LED driver, AC/DC conversion, dimmable, mains supply, user
manual
This is a user manual for the SSL2101 12 W mains dimmable LED driver
demo boards.
NXP Semiconductors
UM10341
SSL2101 12 W mains dimmable LED driver
Revision history
Rev
v.2
Date
20110203
Description
first issue
UM10341
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 2 — 3 February 2011
2 of 24
NXP Semiconductors
UM10341
SSL2101 12 W mains dimmable LED driver
1. Introduction
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.
The SSL2101 driver is a solution for a professional application with multiple high power
LEDs that require galvanic isolation and a safe output voltage. It is mains dimmable for
both forward phase (triac) dimmers, and reverse phase (transistor) dimmers. It can
generate up to 16 W output power, which is equal to a 100 W incandescent lamp (at
63 Lumen/W). Examples are shelf lighting, down lighting and LED lighting for bathrooms
etc. The design demonstrates how to produce a driver that is suitable for small form factor
applications such as retrofit lamps.
2. Safety warning
The board needs to be connected to mains voltage. Touching the reference board during
operation must be avoided at all times. An isolated housing is obligatory when used in
uncontrolled, non-laboratory environments. Even though the secondary circuit with LED
connection has galvanic isolation, this isolation is not according to any regulated norm.
Galvanic isolation of the mains supply using a variable transformer is always
recommended. These devices can be recognized by the symbols shown in
Figure 1:
019aaa690
019aaa691
a. Isolated
Fig 1.
Variac isolation symbols
b. Not Isolated
UM10341
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 2 — 3 February 2011
3 of 24
NXP Semiconductors
UM10341
SSL2101 12 W mains dimmable LED driver
3. Connecting the board
Remark: All components referred to in the text can be located on
Figure 8 “Board
schematic diagram”
and connectors can be found on
Figure 2 “Board connection
diagram”.
The board can be optimized for a 230 V 50 Hz or a 120 V 60 Hz mains supply. In addition
to the mains voltage optimization, the board is designed to work with multiple high power
LEDs with a total working voltage of between 9 V and 23 V. The output current can be
limited using trimmer R20. On request, a dedicated LED load can be delivered that is to
be connected to K3. Connector K2 can be used to attach other LED loads. The output
voltage is limited to 25 V. When attaching a LED load to an operational board (hot
plugging) an inrush peak current will occur due to the discharge of capacitor C6. After
frequent discharges, the LEDs may deteriorate or become damaged.
K1
L
−
+
N
K2
LED−
LED+
−
LED−
K3
LED+
+
019aaa820
Fig 2.
Board connection diagram
If a galvanic isolated transformer is used, it should be placed between the AC source and
the dimmer/demo board. Connect a user defined LED (string) to connector K2 as shown
in
Figure 2.
Note that the anode of the LED (string) is connected to the bottom side of this
connector.
Remark:
When the board is placed in a metal enclosure, the middle pin of connector K1
can be connected to the metal casing for grounding.
UM10341
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 2 — 3 February 2011
4 of 24
NXP Semiconductors
UM10341
SSL2101 12 W mains dimmable LED driver
4. Specifications
Table 1
shows the specifications for the SSL2101 driver
Table 1.
Parameter
AC line input voltage
Specifications
Value
85 V to 276 V
Comment
board has been optimized for
230 V 50 Hz or 120 V 60 Hz
±
10 % variation
Output voltage (LED voltage)
Output voltage protection
Output current (LED current)
Output voltage /load current
dependency
Current ripple
Maximum output power
(LED power)
Efficiency
Power Factor: 120 V 60 Hz
230 V 50 Hz
9 V (DC) to 23 V (DC)
25 V (DC)
400 mA to 800 mA
<
±
4 %/Volt in regulated range
±
150 mA
17 W
70 % to 78 %
0.99
0.94
0.90
60 kHz to 75 kHz
100 % to 0 %
103 mm
×
50 mm
×
20 mm
0
°C
to 85
°C
1.8 kV
+5 % to
−6
%
+3 % to
−3
%
adjustable with trimmer
refer to the attached graphs
at 500 mA
At V
o
+ 21 V
at T
amb
= 25
°C
see
Section 13
graphs
at 15 W output power
at 15 W output power
at 11 W output power
-
-
L
×
W
×
H
-
between primary and secondary
circuit
in the range of 130 V 60 Hz to
110 V 60 Hz
in the range of 250 V 50 Hz to
210 V 50 Hz
Switching frequency
Dimming range
Board dimensions
Operating temperature
Isolation voltage
Input voltage /load current
dependency
UM10341
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 2 — 3 February 2011
5 of 24
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