NCL30081 Series

Step Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting

Catalog

Step Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting

Part	Supplier Device Package	Voltage - Supply (Max) [Max]	Voltage - Supply (Min) [Min]	Topology	Mounting Type	Package / Case	Internal Switch(s)	Type	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]
ON Semiconductor NCL30081BSNT1G	6-TSOP	20 V	8.8 V	Flyback	Surface Mount	SOT-23-6 Thin TSOT-23-6		AC DC Offline Switcher	1	-40 °C	125 °C

Catalog

Step Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting

Key Features

• Primary Side Sensing

• Wide VCCRange

• Precise LED Current Regulation of ±1% typical

• ~ 0.90 PF with passive valley fill

• Open and shorted output protection

• Secondary Diode Short Protection

• Shorted Current Sense Fault Detection

• Input Line Voltage Sensing

• Auto-recoverable (B-version) and Latched (A-version) fault handling

• Wide Temperature range of -40 to 125 °C

Description

The NCL30081 is a PWM current mode controller targeting isolated flyback and non-isolated buck-boost constant current topologies. The controller operates in a quasi-resonant mode to provide high efficiency. Thanks to a novel control method, the device is able to precisely regulate a constant LED current from the primary side. This removes the need for secondary side feedback circuitry, biasing and an optocoupler. This controller has integrated 5 step log dimming which allows and LED bulb to be dimming from a standard wall switch.