UM10731
SSL3401DB1174 7 W mains dimmable MR16/12 V driver for
GU5.3 22 mm
Rev. 1.1 — 14 November 2013
User manual
Document information
Info
Keywords
Content
SSL3401DB1174, board version A844V0101, MR16 LED driver, mains
dimmable, constant current, driver, low voltage supply, AC-to-DC
conversion, LED driver
This user manual describes the SSL3401 7 W dimmable MR16/12 V LED
driver demo board, SSL3401DB1174.
Abstract
NXP Semiconductors
UM10731
SSL3401DB1174 7 W MR16/12 V driver for GU5.3 22 mm
Revision history
Rev
v. 1.1
Date
20131114
Description
updated issue
Modifications:
v. 1
20131023
•
The information about component U5 in
Table 7 “Bill of material”
has been updated.
first issue
Contact information
For more information, please visit:
http://www.nxp.com
For sales office addresses, please send an email to:
salesaddresses@nxp.com
UM10731
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
User manual
Rev. 1.1 — 14 November 2013
2 of 16
NXP Semiconductors
UM10731
SSL3401DB1174 7 W MR16/12 V driver for GU5.3 22 mm
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 SSL3401HN 7 W LED driver is a solution for a dimmable MR16/12 V application
connected to an electronic transformer. It is dimmable with both leading edge (Triac)
dimmers and trailing edge (transistor) dimmers. It generates 5.4 W output power when
using a 27 V LED voltage load. The 27 V LED voltage is the voltage measured at ambient
temperatures and at a 200 mA LED current.
The design provides an example of how to make a driver that is suitable for small form
factor LED retrofit lamps.
The device controls the application to run in hysteretic boost mode. A filtered Pulse Width
Modulation (PWM) signal is generated to control the analog LED current source of the
application. This mode ensures an accurate LED current with low ripple.
2. Safety warnings
The board must be connected to 12 V transformer. Touching the board during operation
must be avoided at all times. An isolated housing is obligatory when used in uncontrolled,
non-laboratory environments. The secondary circuit with LED connection has galvanic
isolation using the 12 V electronic transformer. Thus galvanic isolation of the mains phase
using a variable transformer is always recommended. The symbols shown in
Figure 1
indicate these devices.
019aab173
019aab174
a. Isolated
Fig 1.
b. Not isolated
Variable transformer (Variac) isolation symbols
UM10731
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
User manual
Rev. 1.1 — 14 November 2013
3 of 16
NXP Semiconductors
UM10731
SSL3401DB1174 7 W MR16/12 V driver for GU5.3 22 mm
3. Restrictions
Connect the SSL3401HN 7 W dimmable MR16/12 V demo board to a transformer that
generates a peak output voltage < 30 V.
The evaluation board can drive an LED voltage of 33 V (measured LED voltage at
functional current value) when the electrolytic capacitor CBUS1 (see
Figure 9.)
is
changed to a 50 V capability and the LED current is adjusted to keep the application
working within the same power range.
Pay attention to the 5 V LDO (U6) dissipation and temperature when increasing the LED
voltage.
4. Connecting and configuring the board
The board is designed for 12 V (AC) transformer connected to a 230 V/120 V (AC),
50 Hz/60 Hz mains source. It is designed to work with multiple high-power LEDs with a
total working voltage of between 24 V and 30 V.
Connect the board as shown in
Figure 2.
Fig 2.
Connecting the board
The physical connection in shown in
Figure 3.
Fig 3.
SSL3401DB1174 demo board connections
UM10731
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
User manual
Rev. 1.1 — 14 November 2013
4 of 16
NXP Semiconductors
UM10731
SSL3401DB1174 7 W MR16/12 V driver for GU5.3 22 mm
5. Specification
Table 1
gives the specifications for the SSL3401 7 W application tested with an
OSRAM HTM 70 electronic transformer unless otherwise specified.
Table 1.
Parameter
AC line input voltage
Specifications
Values
11 V (AC; RMS); ±15 %
Comments
electronic transformer
connected to 230 V mains
voltage
board supplied by electronic
transformer
maximum input voltage
input power of system
(excluding electronic
transformer)
output voltage (LED voltage)
efficiency of system
(excluding electronic
transformer
30 V
7.1 W
minimum 24 V; typical 27 V;
maximum 30 V
typical: 73 %
typical: 75 %
at T
amb
= 25
C;
board supplied
by electronic transformer
at a PCB temperature of
100
C;
board supplied by
electronic transformer
power factor
Total Harmonic Distortion
(THD)
output current (LED current)
LED current ripple
dimming range
board dimensions
> 0.9
< 15 %
nominal: 200 mA
< ±10 %
100 % to 5 %
diameter = 22 mm
measured on LED current
adjustable modifying some
resistor values
UM10731
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
User manual
Rev. 1.1 — 14 November 2013
5 of 16
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