NCL30083 Series

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

Catalog

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

Part	Voltage - Supply (Min) [Min]	Package / Case	Package / Case [custom]	Package / Case	Dimming	Operating Temperature [Min]	Operating Temperature [Max]	Number of Outputs	Mounting Type	Topology	Internal Switch(s)	Voltage - Supply (Max) [Max]	Type	Supplier Device Package
ON Semiconductor NCL30083ADMR2G	8.8 V	8-MSOP 8-TSSOP	0.118 in	3 mm	Multi-Step	-40 °C	125 °C	1	Surface Mount	Flyback		28 V	AC DC Offline Switcher	8-MSOP

Catalog

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

Key Features

• Primary Side Sensing

• Wide VCCRange

• Precise LED Current Regulation of ±1% typical

• ~ 0.9 power factor with passive valley fill

• User Programmable Thermal Foldback

• Open and Shorted Output Protection

• Secondary Diode Short Protection

• 5 Step Dimmable to < 5% output current

• VCCundervoltage and overvoltage protection

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

• Wide temperature range of -40 to 125 °C

• Input Line Voltage Sensing

• Programmable Soft start

Description

The NCL30083 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. The device is highly integrated with a minimum number of external components. A robust suite of safety protection is built in to simplify the design. The device supports 5 step log dimming down to 5%. To enhance system lifetime, it has current foldback at a user programmable temperature point. While the NCL30083 has integrated fixed overvoltage protection, the designer has the option to program a lower overvoltage protection level.