UL22
DESCRIPTION
Featured Device, UTC UL22, is a PWM controller with innovative Free-Dimming TM technology. The controller drives one of the two strings of LEDs by an ON/OFF AC wall switch and provides a cost effective solution for light control. It supports power-factor-correction function in applications.
UTC UL22 provides several protection features
. It includes a cycle-by-cycle current limit to the power switch; over-current protection at the LED load; bias voltage VDD over-voltage protection. In addition, the driver output (DRV) voltage is clamped for driving the external power MOSFET effectively and safely. The controller also features an internal over-temperature protection.
- FEATURES
- Free-Dimming TM technology
- Proprietary technology using ON/OFF wall switch to select one of the two LED channels
- Supports high-side Buck, Buck-Boost and Flyback topologies
- High power factor with Discontinue-Current-Mode (DCM) control
- Low start-up current and operating current to maximize...
