NCL30185: AC-DC Power Factor Corrected 3 Step Dimmable Quasi-Resonant Primary Side Current Mode Controller for LED Lighting
The NCL30185 is an AC-DC power factor corrected flyback controller targeting isolated and non−isolated buck-boost/SEPIC constant current LED drivers. The controller operates in a quasi−resonant mode to provide optimal efficiency. Thanks to a novel control method, the device is able to tightly regulate a constant LED current from the primary side. This removes the need for secondary side feedback circuitry, biasing and an optocoupler. The device is highly integrated with a minimum number of external components. A robust suite of safety protection is built in to simplify the design. This controller has integrated 3 step log dimming which allows an LED bulb or luminaire to be dimming from a standard wall switch.
In addition to steps of 70% and 25% which are similar to a traditional 3 way lamp, one additional step of 5% current is included to support deep dimming applications.
Features- Constant Current Control with Primary Side Feedback
- No need for binning of LEDs or production trimming for accuracy
- 3 dimmable steps of 70%, 25%, and 5% of full current
- Line Feedforward for Enhanced Regulation Accuracy
- Wide Vcc operating range
- User Programmable Thermal Foldback
- Output LED open and short protection
- Secondary Diode Short Protection
- VCC undervoltage and overvoltage protection
- Wide Temperature range of -40 to 125 °C
- Auto-recoverable (B-version) and Latched (A-version) fault handling options
| Benefits- No need for binning of LEDs or production trimming for accuracy
- Exceeds industry requirements for lighting
- Energy saving dimming with standard wall switch
- Supports accurate regulation for universal mains applications
- Simplifies support for a broad range of LED forward voltages with one magnetic design
- Protects LED driver from overheating in severe situations
- Robust fault handling of common LED system faults
- Avoids overheating in fault condition
- Robust fault handling
- Suports outdoor and high temperature environments
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Applications- Integrated LED Driver Electronics
- LED Lighting
| End Products- LED Bulbs
- LED Driver Power Supplies
- LED Light Engines
- LED Tubes
- Electronic Control Gear for LED Systems
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Application Notes (2)
Package Drawings (1)
Data Sheets (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCL30185ADR2G | Active | Pb-free
Halide free | SOIC-8 | 751-07 | 3 | Tape and Reel | 2500 | $0.3893 |
| NCL30185BDR2G | Active | Pb-free
Halide free | SOIC-8 | 751-07 | 3 | Tape and Reel | 2500 | $0.3893 |
Specifications
| Product | Topology | VI Min (V) | VI Max (V) | VO Max (V) | IO Max (mA) | fSW Typ (kHz) |
|---|
| NCL30185ADR2G | Step-Up/Step-Down | 9.4 | 26 | 200 | 3000 | Up to 150 |
| NCL30185BDR2G | Step-Up/Step-Down | 9.4 | 26 | 200 | 3000 | Up to 150 |
