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reference designNCL30085

Onsemi NCL30085

AC-DC Power Factor Corrected 3 Step Dimmable Quasi-Resonant Primary Side Current Mode Controller for LED Lighting

Overview

TopologyFlyback Converter
Input voltage90-265 V
Output 128 V / 0.35 A
Output 220 V / 0.5 A
IC revision3

Description

The NCL30085 is a power factor corrected flyback controllertargeting isolated and non−isolated constant current LED drivers. Thecontroller operates in a quasi−resonant mode to provide optimalefficiency. Thanks to a novel control method, the device is able totightly regulate a constant LED current from the primary side. Thisremoves the need for secondary side feedback circuitry, biasing and anoptocoupler.

The device is highly integrated with a minimum number of externalcomponents. A robust suite of safety protection is built in to simplifythe design. This device is specifically intended for very compact,space efficient designs and supports 3 levels of log step dimmingwhich allows light output reduction by toggling the main AC switchon and off to signal the controller to reduce the LED current pointdown to 5% of full load.

Features

  • Quasi−resonant Peak Current−mode Control Operation
  • Constant Current Control with Primary Side Feedback
  • Tight LED Constant Current Regulation of ±2% Typical
  • Power Factor Correction
  • 3 Step Dimming (70/25/5%)
  • Line Feedforward for Enhanced Regulation Accuracy
  • Low Start−up Current (10 A typ.)
  • Wide Vcc Range
  • 300 mA / 500 mA Totem Pole Driver with 12 V Gate Clamp
  • Robust Protection Features
  • OVP on VCC
  • Programmable Over Voltage / LED Open Circuit Protection
  • Cycle−by−cycle Peak Current Limit
  • Winding Short Circuit Protection
  • Secondary Diode Short Protection
  • Output Short Circuit Protection
  • Current Sense Short Protection
  • User Programmable NTC Based Thermal Foldback
  • Thermal Shutdown
  • Vcc Undervoltage Lockout
  • Brown−out Protection
  • Pb−Free, Halide−Free MSL1 Product

Typical applications

  • LED Light Engines
  • Integral LED Bulbs and Tubes
  • LED Drivers/Power Supplies

More information

Products

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L(µH)
IR(A)
ISAT,10%(A)
RDC max.(Ω)
fres(MHz)
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7447462152
SPECWE-TI Radial Leaded Wire Wound Inductor, 1500 µH, 0.19 A
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TI Radial Leaded Wire Wound Inductor
Inductance1500 µH
Rated Current0.19 A
Saturation Current @ 10%0.22 A
DC Resistance8 Ω
Self Resonant Frequency1.8 MHz
VersionHeat Shrinking Tube 
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7447720222
SPECWE-TI Radial Leaded Wire Wound Inductor, 2200 µH, 0.29 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TI Radial Leaded Wire Wound Inductor
Inductance2200 µH
Rated Current0.29 A
Saturation Current @ 10%0.35 A
DC Resistance4.73 Ω
Self Resonant Frequency1.1 MHz
VersionStandard 
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7508112342
SPECOffline Transformer, WE-UNIT, –, –
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Status Activei| Production is active. Expected lifetime: >10 years.
Product series Offline Transformer, WE-UNIT
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750871144
SPECOffline Transformer, –, –
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Status Activei| Production is active. Expected lifetime: >10 years.
Product series Offline Transformer
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