Overview
The NCL30186BDR2G is an AC-DC power factor corrected flyback controller designed by onsemi, targeting isolated and non-isolated ‘smart-dimmable’ constant current LED drivers. This controller operates in a quasi-resonant mode to optimize efficiency and supports flyback, buck-boost, and SEPIC topologies. It features a proprietary current-control algorithm that tightly regulates a constant LED current from the primary side, eliminating the need for secondary-side feedback circuitry or an optocoupler. The device is highly integrated, requiring a minimum number of external components, and is designed for very compact, space-efficient designs. It also supports analog and PWM dimming with a dedicated dimming input to control the average LED current. A user-configurable current foldback circuit ensures reliable operation at elevated temperatures, and the device includes a robust suite of safety protections.
Key Specifications
| Symbol | Description | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| VCC(MAX) | Maximum Power Supply voltage, VCC pin, continuous voltage | V | -0.3 | - | 30 |
| VDRV(MAX) | Maximum driver pin voltage, DRV pin, continuous voltage | V | -0.3 | - | VDRV (Note 1) |
| VMAX | Maximum voltage on low power pins (except DRV and VCC pins) | V | -0.3 | - | 5.5 |
| TJ(MAX) | Maximum Junction Temperature | °C | - | - | 150 |
| TJ(OPER) | Operating Temperature Range | °C | -40 | - | 125 |
| RθJ−A | Thermal Resistance Junction−to−Air | °C/W | - | - | 180 |
| ICC(start) | Startup current | μA | 13 | 30 | - |
| ICC(Fault) | Startup current in fault mode | μA | 58 | 75 | - |
| VILIM | Maximum Internal current limit | V | 0.95 | 1.00 | 1.05 |
Key Features
- Quasi-resonant Peak Current-mode Control Operation
- Valley Lockout Optimizes Efficiency over the Line/Load Range
- Constant Current Control with Primary Side Feedback
- Tight LED Constant Current Regulation of ±2% Typical
- Power Factor Correction
- Analog or PWM dimming
- Line Feedforward for Enhanced Regulation Accuracy
- Low Start-up Current (10 μA typ.)
- Wide Vcc Range
- 300 mA / 500 mA Totem Pole Driver with 12 V Gate Clamp
- Robust Protection Features:
- Brown-Out Detection
- VCC Over Voltage Protection
- 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 (CS) Short Detection
- User programmable NTC Based Thermal Foldback
- Thermal Shutdown
- −40 to 125°C Operating Junction Temperature
- Pb-Free, Halide-Free Product
Applications
- Integral LED Bulbs
- LED Light Engines
- LED Driver Power Supplies
- Smart LED Lighting Applications
Q & A
- What is the primary function of the NCL30186BDR2G?
The NCL30186BDR2G is an AC-DC power factor corrected flyback controller designed for isolated and non-isolated ‘smart-dimmable’ constant current LED drivers.
- What topologies does the NCL30186BDR2G support?
The controller supports flyback, buck-boost, and SEPIC topologies.
- How does the NCL30186BDR2G regulate LED current?
The device tightly regulates a constant LED current from the primary side using a proprietary current-control algorithm, eliminating the need for secondary-side feedback circuitry or an optocoupler.
- What dimming methods does the NCL30186BDR2G support?
The device supports both analog and PWM dimming with a dedicated dimming input.
- What safety features are built into the NCL30186BDR2G?
The device includes robust protection features such as brown-out detection, VCC over voltage protection, programmable over voltage / LED open circuit protection, cycle-by-cycle peak current limit, winding short circuit protection, and more.
- What is the operating temperature range of the NCL30186BDR2G?
The operating temperature range is from -40°C to 125°C.
- What is the maximum junction temperature of the NCL30186BDR2G?
The maximum junction temperature is 150°C.
- How does the NCL30186BDR2G handle thermal management?
The device includes a user-configurable current foldback circuit and thermal shutdown to ensure reliable operation at elevated temperatures.
- What package type is the NCL30186BDR2G available in?
The device is housed in an SOIC10 package, which has the same body size as a standard SOIC8.
- Is the NCL30186BDR2G Pb-Free and Halide-Free?
Yes, the NCL30186BDR2G is Pb-Free and Halide-Free.
