NCL30083: Step Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting with thermal foldback
The NCL30083 is a PWM current mode controller targeting isolated flyback and non-isolated buck-boost constant current topologies. The controller operates in a quasi-resonant mode to provide high efficiency. Thanks to a novel control method, the device is able to precisely 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. The device supports 5 step log dimming down to 5%. To enhance system lifetime, it has current foldback at a user programmable temperature point. While the NCL30083 has integrated fixed overvoltage protection, the designer has the option to program a lower overvoltage protection level.
Features- Primary Side Sensing
- Wide VCC Range
- Precise LED Current Regulation of ±1% typical
- ~ 0.9 power factor with passive valley fill
- User Programmable Thermal Foldback
- Open and Shorted Output Protection
- Secondary Diode Short Protection
- 5 Step Dimmable to < 5% output current
- VCC undervoltage and overvoltage protection
- Latched (A version) and Auto-recoverable (B version) fault handling
- Wide temperature range of -40 to 125 °C
- Input Line Voltage Sensing
- Programmable Soft start
| Benefits- No optocoupler or secondary control circuitry required
- Allows support for wide number of LEDs in string and simplifies transformer design
- No need for binning of LED forward voltage or trimming in production for accuracy
- Meets Energystar® LED Bulb and Residential Luminaire Standards
- Protects system from overheating by gracefully reducing current
- Robust handling of faults
- Avoids overheating in fault conditions
- Allows dimming with standard wall switch
- Reliable operation across all conditions
- Flexiblity in design
- Supports outdoor and high temperature operating environments
- Enhanced regulation accuracy
- Improves startup behavior
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Applications- Line Powered LED Drivers
- Integral Driver Electronics
| End Products- Integral LED Bulbs and downlights
- LED Light Engines
- Electronic Control Gear for LEDs
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Design & Development Tools (1)
Package Drawings (1)
Application Notes (3)
Evaluation Board Documents (9)
Data Sheets (1)
Evaluation/Development Tool Information
| Product | Status | Compliance | Short Description |
|---|
| NCL30083BB1GEVB | Active | Pb-free | 10 W / 200 mA Buck Boost Evaluation Board |
| NCL30083FLYGEVB | Active | Pb-free | FLYBACK A19 10W/500MA 100 |
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCL30083ADMR2G | Active | Pb-free
Halide free | Micro8™ | 846A-02 | 1 | Tape and Reel | 4000 | $0.31 |
| NCL30083BDMR2G | Active | Pb-free
Halide free | Micro8™ | 846A-02 | 1 | Tape and Reel | 4000 | $0.31 |
Specifications
| Product | Topology | VI Min (V) | VI Max (V) | VO Max (V) | IO Max (mA) | fSW Typ (kHz) |
|---|
| NCL30083ADMR2G | Flyback | 9.4 | 26 | 300 | 3000 | Up to 150 |
| NCL30083BDMR2G | Flyback | 9.4 | 26 | 300 | 3000 | Up to 150 |
