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Onsemi NCL30085
AC-DC Power Factor Corrected 3 Step Dimmable Quasi-Resonant Primary Side Current Mode Controller for LED Lighting
Overview
| Topology | Flyback Converter |
| Input voltage | 90-265 V |
| Output 1 | 28 V / 0.35 A |
| Output 2 | 20 V / 0.5 A |
| IC revision | 3 |
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
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT,10%(A) | RDC max.(Ω) | fres(MHz) | Version | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI Radial Leaded Wire Wound Inductor, 1500 µH, 0.19 A | 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 | ||||
| WE-TI Radial Leaded Wire Wound Inductor, 2200 µH, 0.29 A | 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 | ||||
7508112342 | Offline Transformer, WE-UNIT, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Offline Transformer, WE-UNIT | – | – | – | – | – | – | ||
750871144 | Offline Transformer, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Offline Transformer | – | – | – | – | – | – |