NCL30081: Step Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting
The NCL30081 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. This controller has integrated 5 step log dimming which allows and LED bulb to be dimming from a standard wall switch.
Features- Primary Side Sensing
- Wide VCC Range
- Precise LED Current Regulation of ±1% typical
- ~ 0.90 PF with passive valley fill
- Open and shorted output protection
- Secondary Diode Short Protection
- Shorted Current Sense Fault Detection
- Input Line Voltage Sensing
- Auto-recoverable (B-version) and Latched (A-version) fault handling
- Wide Temperature range of -40 to 125 °C
| Benefits- No opto-coupler or secondary control circuitry
- Simplifies support for a broad range of LED forward voltages with one transformer design
- No need for binned forward voltage LEDS or production trimming for current accuracy
- Supports US Energystar ® Integral LED Bulb and Luminaire Specifications
- Easy handling of possible LED string faults
- Avoids overheating in fault mode
- Robust fault handling
- Enhanced Regulation Accuracy across AC line variation
- Flexiblity in fault handling response
- Supports outdoor and high temperature environments
|
Applications- Integral LED Driver Electronics
| End Products- LED Bulbs and Downlights
- LED Driver Power Supplies
- Electronic Control Gear for LEDs
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Design & Development Tools (2)
Package Drawings (1)
| Document Title | Document ID/Size | Revision |
|---|
| TSOP-6 | 318G-02 (64.1kB) | V |
Application Notes (2)
Evaluation Board Documents (5)
Data Sheets (1)
Evaluation/Development Tool Information
| Product | Status | Compliance | Short Description |
|---|
| NCL30081LEDGEVB | Active | Pb-free | Flyback Compact GU10 4W Current Mode Evaluation Board |
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCL30081ASNT1G | Active | Pb-free
Halide free | TSOP-6 | 318G-02 | 1 | Tape and Reel | 3000 | $0.28 |
| NCL30081BSNT1G | Active | Pb-free
Halide free | TSOP-6 | 318G-02 | 1 | Tape and Reel | 3000 | $0.28 |
Specifications
| Product | Topology | VI Min (V) | VI Max (V) | VO Max (V) | IO Max (mA) | fSW Typ (kHz) |
|---|
| NCL30081ASNT1G | Flyback | 9.4 | 26 | 200 | 3000 | Up to 150 |
| NCL30081BSNT1G | Flyback | 9.4 | 26 | 200 | 3000 | Up to 150 |
