SSL3401HN Datasheet, PDF (1/29 Pages) NXP Semiconductors – Low voltage dimmable controller for LED lighting

SSL3401HN
Low voltage dimmable controller for LED lighting
Rev. 2 — 28 January 2014
Product data sheet
1. General description
The SSL3401HN is a Switched Mode Power Supply (SMPS) controller IC. It operates in
combination with a phase cut dimmer and a 12 V (AC or DC) low voltage electronic or
magnetic transformer. It is designed to drive LED devices and include a dimmer
conduction phase detector.
The chip includes a hysteretic controller for the power converter. It is most suitable for use
with a linear LED current source. Two embedded Proportional-Integral (PI) controllers and
a 0.052 % resolution PWM generator, adjusted by the dimmer conduction phase, ensure
excellent LED current stability for a dimming range from 100 % to less than 5 %. It also
minimizes the power loss across the LED current source.
Several protection mechanisms are available:
• OverVoltage Protection (OVP)
• Coil Current Limitation (CCL)
• Short LED protection (SLED)
• Open LED protection (OLED)
• UnderVoltage LockOut (UVLO)
• Advanced adaptive OverTemperature Protection (OTP)
2. Features and benefits
 Easy migration to existing lighting control infrastructure
 Support most available dimming and low-voltage transformation solutions
 Excellent stability of LED current
 Double PI controllers to enhance the line regulation of the LED current
 Optimized dimming curve for low-voltage transformer compatibility
 Automatic supply frequency detection for seamless operation with 50 Hz, 60 Hz or DC
sources
 Dimmer conduction angle detection
 Coil current limitation
 Temperature roll-back protection
 OverVoltage Protection
 Power-On-Reset (POR)
 Shorted LED protection
 Open LED detection