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NCL30000 Datasheet PDF : 22 Pages
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NCL30000
Power Factor Corrected
Dimmable LED Driver
The NCL30000 is a switch mode power supply controller intended
for low to medium power single stage power factor (PF) corrected
LED Drivers. The device is designed to operate in critical conduction
mode (CrM) and is suitable for flyback as well as buck topologies.
Constant on time CrM operation is particularly suited for isolated
flyback LED applications as the control scheme is straightforward and
very high efficiency can be achieved even at low power levels. These
are important in LED lighting to comply with regulatory requirements
and meet overall system luminous efficacy requirements. In CrM, the
switching frequency will vary with line and load and switching losses
are low as recovery losses in the output rectifier are negligible since
the current goes to zero prior to reactivating the main MOSFET
switch.
The device features a programmable on time limiter, zero current
detect sense block, gate driver, trans-conductance error amplifier as
well as all PWM control circuitry and protection functions required to
implement a CrM switch mode power supply. Moreover, for high
efficiency, the device features low startup current enabling fast, low
loss charging of the VCC capacitor. The current sense protection
threshold has been set at 500 mV to minimize power dissipation in the
external sense resistor. To support the environmental operation range
of Solid State Lighting, the device is specified across a wide junction
temperature range of −40C to 125C.
Features
Very Low 24 mA Typical Startup Current
Constant On Time PWM Control
Cycle-by-Cycle Current Protection
Low Current Sense Threshold of 500 mV
Low 2 mA Typical Operating Current
Source 500 mA/Sink 800 mA Totem Pole Gate Driver
Reference Design for TRIAC and Trailing Edge Line Dimmers
Wide Operating Temperature Range
No Input Voltage Sensing Requirement
Enable Function and Overvoltage Protection
These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
LED Driver Power Supplies
LED Based Down Lights
Commercial and Residential LED Fixtures
TRIAC Dimmable LED Based PAR Lamps
Power Factor Corrected Constant Voltage Supplies
http://onsemi.com
SOIC−8
CASE 751
PIN CONNECTION
MFP
Comp
Ct
CS
(Top View)
VCC
DRV
GND
ZCD
MARKING DIAGRAM
8
L0000
ALYW
G
1
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb-Free Package
ORDERING INFORMATION
Device
Package
Shipping†
NCL30000DR2G SOIC−8 2,500/Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
Semiconductor Components Industries, LLC, 2012
1
September, 2012 − Rev. 1
Publication Order Number:
NCL30000/D
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