UM10731 Datasheet, PDF (3/16 Pages) NXP Semiconductors – SSL3401DB1174 7 W mains dimmable MR16/12 V driver for GU5.3 22 mm

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
b. Not isolated
Fig 1. Variable transformer (Variac) isolation symbols
UM10731
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 1.1 — 14 November 2013
© NXP B.V. 2013. All rights reserved.
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