Overview
The NCL30082BDR2G, produced by onsemi, is a high-efficiency, quasi-resonant primary side current-mode controller designed for isolated flyback and non-isolated constant current topologies in LED lighting applications. This controller operates without the need for secondary side feedback circuitry, biasing, or an optocoupler, thanks to its primary side sensing capability. It features precise LED constant current regulation with an accuracy of ±1% typical, and it supports both analog and PWM dimming. The device is highly integrated, requiring a minimum number of external components, and includes robust safety protection mechanisms such as overvoltage protection, thermal shutdown, and short circuit protection.
Key Specifications
| Parameter | Unit | Min | Max | |
|---|---|---|---|---|
| VCC(Max) | V | - | - | 30 |
| Supply Current (ICC) | mA | 0.8 | 1.2 | 2.7 |
| Internal Current Limit (VILIM) | V | 0.95 | 1 | 1.05 |
| Leading Edge Blanking Duration (tLEB) | ns | 240 | 300 | 350 |
| Gate Drive Current Capability (ISNK/ISRC) | mA | - | - | 500 / 300 |
| Thermal Shutdown (TSHDN) | °C | 130 | 150 | 170 |
| Thermal Shutdown Hysteresis (TSHDN(HYS)) | °C | - | - | 50 |
Key Features
- Quasi-Resonant Peak Current-Mode Control Operation: Enhances efficiency by operating in a quasi-resonant mode.
- Primary Side Sensing: Eliminates the need for secondary side feedback circuitry, biasing, and an optocoupler.
- Precise LED Constant Current Regulation: Achieves ±1% typical accuracy in LED current regulation.
- Analog/Digital Dimming Support: Supports both analog and PWM dimming control.
- Thermal Current Fold-Back: Reduces output current in response to temperature changes.
- Robust Safety Protection: Includes overvoltage protection, thermal shutdown, short circuit protection, and brown-out protection.
- Wide VCC Range and High Gate Drive Capability: Supports a wide VCC range and features a totem pole driver with 12 V gate clamp.
Applications
The NCL30082BDR2G is designed for use in various LED lighting applications, including:
- Isolated flyback converters
- Non-isolated constant current converters
- Dimmable LED lighting systems
- General lighting solutions requiring high efficiency and precise current regulation
Q & A
- What is the primary function of the NCL30082BDR2G?
The NCL30082BDR2G is a quasi-resonant primary side current-mode controller for LED lighting applications, providing precise constant current regulation.
- What are the key benefits of primary side sensing in the NCL30082BDR2G?
Primary side sensing eliminates the need for secondary side feedback circuitry, biasing, and an optocoupler, simplifying the design and reducing component count.
- How does the NCL30082BDR2G support dimming?
The device supports both analog and PWM dimming control through the DIM pin.
- What safety protection mechanisms are built into the NCL30082BDR2G?
The device includes overvoltage protection, thermal shutdown, short circuit protection, and brown-out protection.
- What is the typical accuracy of the LED constant current regulation in the NCL30082BDR2G?
The device achieves ±1% typical accuracy in LED current regulation.
- How does the thermal current fold-back feature work?
The thermal current fold-back reduces the output current in response to temperature changes, ensuring safe operation.
- What is the maximum supply current (ICC) for the NCL30082BDR2G?
The maximum supply current (ICC) is 2.7 mA.
- What is the thermal shutdown temperature for the NCL30082BDR2G?
The thermal shutdown temperature is between 130°C to 170°C.
- What is the gate drive current capability of the NCL30082BDR2G?
The gate drive current capability is 500 mA sink and 300 mA source.
- What package type is the NCL30082BDR2G available in?
The device is available in an SOIC-8 package.
