UL22 LED DRIVER CONTROLLER
■Featured Device, UTC UL22, is a PWM controller with innovative Free-Dimming™ 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-DimmingTM 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 conversion efficiency
■Under-voltage lockout (UVLO) with hysteresis
■Provides complete protection functions
▲Maximum gate driver output clamp
▲VDD pin Over-Voltage Protection
▲Cycle-by-cycle current limit
▲LEDs Over-Current Protection
▲LEDs Open-Loop Protection
▲LEDs Short-Circuit Protection
▲Internal Over-Temperature Protection
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LED DRIVER CONTROLLER 、 CMOS IC 、 PWM controller 、 controller |
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Datasheet |
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Please see the document for details |
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HSOP-8 |
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English Chinese Chinese and English Japanese |
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2019/6/4 |
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QW-R125-088.b |
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730 KB |
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