NCL30081 Datasheet, PDF (1/23 Pages) ON Semiconductor – Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting

NCL30081
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Dimmable Quasi-Resonant
Primary Side Current-Mode
Controller for LED Lighting
The NCL30081 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
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
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TSOP−6
SN SUFFIX
CASE 318G
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
reduce the light intensity in 5 steps down to 5% dimming.
Features
AAxAYWG
G
• Quasi−resonant Peak Current−mode Control Operation
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• Primary Side Sensing (no optocoupler needed)
• Wide V_CC Range
• Precise LED Constant Current Regulation ±1% Typical
• Line Feed−forward for Enhanced Regulation Accuracy
• Low LED Current Ripple
AAx = Specific Device Code
x = G or H
A = Assembly Location
Y = Year
W = Work Week
G = Pb−Free Package
• 250 mV ±2% Guaranteed Voltage Reference for Current Regulation
(Note: Microdot may be in either location)
• ~ 0.9 Power Factor with Valley Fill Input Stage
• Low Start−up Current (10 mA typ.)
• Small Space Saving Low Profile Package
• 5 State Quasi−log Dimmable
PIN CONNECTIONS
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ZCD
VIN
• Wide Temperature Range of −40 to +125°C
GND
VCC
• Pb−free, Halide−free MSL1 Product
CS
DRV
• Robust Protection Features
♦ Over Voltage / LED Open Circuit Protection
(Top View)
♦ Secondary Diode Short Protection
♦ Output Short Circuit Protection
♦ Shorted Current Sense Pin Fault Detection
♦ Latched and Auto−recoverable Versions
♦ Brown−out
♦ V_CC Under Voltage Lockout
♦ Thermal Shutdown
Typical Applications
• Integral LED Bulbs
• LED Power Driver Supplies
• LED Light Engines
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2013
January, 2013 − Rev. P0
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 23 of this data sheet.
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Publication Order Number:
NCL30081/D