SSL3401HN

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 ...