AN11411_15 Datasheet, PDF (3/26 Pages) NXP Semiconductors – SSL3401HN dimmable driver for MR16/12 V GU5.3

NXP Semiconductors
AN11411
SSL3401HN dimmable driver for MR16/12 V GU5.3
1. Introduction
Light Emitting Diodes (LEDs) have been used in electronic systems for many years,
primarily as indicator lights on electronic devices. Recent developments in terms of
brightness and available colors have made it possible to use LEDs in a wide range of
applications. These include lighting in cell phones, media players, and replacing
conventional light sources in commercial and domestic lighting applications.
The key enablers driving the expansion of LED lighting are the availability of
high-brightness LEDs and intelligent LED controllers. Product designers who incorporate
high-brightness LEDs face many challenges, like thermal management, driver
scheme/topology and existing lamp shape and regulation compliancy. The optimized lamp
shape ensures that a low-component application BOM is required for building the
application.
The SSL3401 offers hysteretic control for the power converter. It is suitable for use with a
linear LED current source. Two embedded Proportional-Integral (PI) controllers and a
0.052 % resolution Pulse-Width Modulation (PWM) generator, adjusted by the dimmer
conduction phase, ensure excellent LED current stability for a dimming range from 100 %
to less than 5 %. The power loss across the LED current source is also minimized.
The SSL3401 enables the low-voltage lamp/module designer to produce an LED driver
that:
• Eases migration to an existing lighting control infrastructure
• Supports most available dimming and low-voltage transformation solutions
• Provides excellent stability of LED current
• Enhances the line regulation of the LED current
• Optimizes the dimming curve for low-voltage transformer compatibility
• Operates with 50 Hz, 60 Hz or DC sources
• Provides protections like OverVoltage Protection (OVP), shorted LED protection and
opened LED protection
AN11411
Application note
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 23 January 2014
© NXP B.V. 2014. All rights reserved.
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