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IC manufacturers ON Semiconductor

IC manufacturers (79)

ON Semiconductor NCL30000

Power Factor Corrected Dimmable LED Driver

Overview

Topology Flyback Converter
Switching frequency 300 kHz
IC revision 1

Description

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 −40C to 125C.

Features

  • Very Low 24 A 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 Based Down Lights
  • TRIAC Dimmable LED Based PAR Lamps
  • Commercial and Residential LED Fixtures
  • Power Factor Corrected Constant Voltage Supplies
  • LED Driver Power Supplies

Products

Order Code Data­sheet Downloads Product series L
(µH)
IR
(A)
RDC max.
(mΩ)
RDC typ.
(Ω)
fres
(MHz)
IR 1
(A)
L1
(µH)
RDC1 max.
(mΩ)
VR
(V (AC))
VT
(V (AC))
Samples
744841330
STE ALT EAG CAD LTS PSP IGS CAD SPA WE-CMB NiZn Common Mode Power Line Choke 30 3 26 3 30 26 250 1500
7447412681
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-TI Radial Leaded Wire Wound Inductor 680 0.33 4000 2.62 2.9
7446620027
STE ALT EAG CAD LTS PSP IGS CAD SPA WE-LF Common Mode Power Line Choke 27000 0.4 1200 0.4 27000 1200 250 1500
750312594
Power Inductor
Order Code Data­sheet
744841330
7447412681
7446620027
750312594
Samples
Order Code Data­sheet Downloads Product series L
(µH)
IR
(A)
RDC max.
(mΩ)
RDC typ.
(Ω)
fres
(MHz)
IR 1
(A)
L1
(µH)
RDC1 max.
(mΩ)
VR
(V (AC))
VT
(V (AC))
Samples