NCL30083_15 Datasheet, PDF (1/35 Pages) ON Semiconductor – Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting with Thermal Fold-back

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
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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 V_CC 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 be in either location)
• 250 mV ±2% Guaranteed Voltage Reference for Current Regulation
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• ~ 0.9 Power Factor with Valley Fill Input Stage
• Low Start−up Current (13 mA typ.)
• 5 State Quasi−log Dimmable
L30083x
ALYW
G
1
• Thermal Fold−back
• Programmable soft−start
• Wide Temperature Range of −40 to +125°C
L30083x = Specific Device Code
x
=B
A
= Assembly Location
L
= Wafer Lot
• Pb−free, Halide−free MSL1 Product
• Robust Protection Features
♦ Over Voltage / LED Open Circuit Protection
Y
= Year
W
= Work Week
G
= Pb−Free Package
♦ Latched and Auto−recoverable Versions
♦ Over Temperature Protection
♦ Brown−out
♦ Secondary Diode Short Protection
♦ Output Short Circuit Protection
♦ Shorted Current Sense Pin Fault Detection
Typical Applications
• Integral LED Bulbs
♦ V_CC Under VoltagPeILNoCckOoNuNt ECTIONS
♦ Thermal Shutdown 1
SD
SS
ZCD
VIN
CS
VCC
GND
DRV
• LED Power Driver Supplies
(Top View)
• LED Light Engines
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 35 of this data sheet.
© Semiconductor Components Industries, LLC, 2015
1
January, 2015 − Rev. 2
Publication Order Number:
NCL30083/D