Dimmable Quasi-Resonant Primary Side Current-Mode Controller
NCL30083
Dimmable Quasi-Resonant
Primary Side Current-Mode
Controller for LED Lighting
with Thermal Fold-back
The N...
Description
NCL30083
Dimmable Quasi-Resonant
Primary Side Current-Mode
Controller for LED Lighting
with Thermal Fold-back
The NCL30083 is a PWM current mode controller targeting isolated
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flyback and non−isolated constant current topologies. The controller
operates in a quasi−resonant mode to provide high efficiency. Thanks
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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.
1 Micro8 DM SUFFIX
1
SOIC−8 D SUFFIX
The device is highly integrated with a minimum number of external
CASE 846A
CASE 751
components. A robust suite of safety protection is built in to simplify
the design. This device is specifically intended for very compact space efficient designs. It supports step dimming by monitoring the AC line and detecting when the line has been toggled on−off−on by the user to
MARKING DIAGRAM 8
reduce the light intensity in 5 steps down to 5% dimming.
AAx
Features
Quasi−resonant Peak Current−mode Control Operation Primary Side Sensing (no optocoupler needed) Wide VCC Range Source 300 mA/Sink 500 mA Totem Pole Driver with 12 V Gate Clamp Precise LED Constant Current Regulation ±1% Typical Line Feed−forward for Enhanced Regulation Accuracy Low LED Current Ripple
AYWG G
1
AAx = Specific Device Code x = E or F A = Assembly Location Y = Year W = Work Week G = Pb−Free Package (Note: Microdot may...
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