Overview
The NCL30488A3DR2G, produced by onsemi, is a power factor corrected flyback controller designed for isolated constant current LED drivers. This controller operates in a quasi-resonant mode to achieve high efficiency and tight regulation of the LED current from the primary side, eliminating the need for secondary side feedback circuitry and optocouplers. It is highly integrated with a minimal number of external components and includes a robust suite of safety protections to simplify design.
Key Specifications
| Parameter | Unit | Min | Max | |
|---|---|---|---|---|
| Input Voltage Range | Vrms | - | - | 320 |
| Maximum Junction Temperature | °C | - | - | 150 |
| Operating Temperature Range | °C | -40 | - | 125 |
| Storage Temperature Range | °C | -60 | - | 150 |
| ESD Capability, HBM model (except HV pin) | kV | - | - | 4 |
| ESD Capability, HBM model (HV pin) | kV | - | - | 1.5 |
| ESD Capability, CDM model | kV | - | - | 1 |
| Maximum Voltage on HV Pin | V | - | - | 700 |
| Maximum Current on HV Pin | mA | - | - | 20 |
| Maximum Voltage on Low Power Pins (except DRV and VCC) | V | -0.3 | - | 5.5 |
| Current Range for Low Power Pins (except DRV and VCC) | mA | -2 | - | 5 |
| Thermal Resistance Junction-to-Air | °C/W | - | - | 200 |
| Internal Current Limit | V | 1.33 | 1.40 | 1.47 |
| Leading Edge Blanking Duration for VILIM | ns | 283 | 345 | 407 |
Key Features
- High Voltage Startup: The controller can start up with high voltage inputs.
- Quasi-Resonant Peak Current-Mode Control Operation: Optimizes efficiency by switching in the valley of the MOSFET drain-source voltage.
- Primary Side Feedback: Regulates constant LED current from the primary side, eliminating the need for secondary side feedback circuitry and optocouplers.
- CC / CV Accurate Control: Provides tight LED constant current regulation of ±2% typical and accurate output voltage regulation.
- Digital Power Factor Correction: Achieves high power factor correction and low THD while maintaining accurate constant current and constant voltage control.
- Cycle-by-Cycle Peak Current Limit: Turns off the MOSFET when the current sense voltage exceeds the internal threshold.
- Winding Short-Circuit Protection: Stops the controller if the CS signal exceeds 1.5 times the internal current limit.
- Output Under Voltage Protection: Shuts down the controller if a too low voltage is applied on the ZCD pin for 90 ms.
- Thermal Shutdown: Disables the gate drive when the junction temperature exceeds 150°C.
- Brown-Out Protection: Safely stops the controller if the input voltage is too low and restarts when the line recovers.
- Fast Over Voltage Protection: Shuts down the controller if the voltage of the ZCD pin exceeds 130% of its regulation level.
Applications
- Isolated Constant Current LED Drivers: Ideal for applications requiring high efficiency and tight current regulation.
- General Lighting Systems: Suitable for various lighting applications where power factor correction and constant current/voltage regulation are necessary.
- Industrial Lighting: Used in industrial settings where robust safety features and high efficiency are critical.
- Commercial Lighting: Applicable in commercial environments requiring reliable and efficient lighting solutions.
Q & A
- What is the primary function of the NCL30488A3DR2G?
The NCL30488A3DR2G is a power factor corrected flyback controller designed for isolated constant current LED drivers.
- What is the input voltage range for the NCL30488A3DR2G?
The input voltage range is up to 320 Vrms.
- How does the NCL30488A3DR2G regulate LED current?
The controller regulates LED current from the primary side using a proprietary circuit, eliminating the need for secondary side feedback circuitry and optocouplers.
- What safety features does the NCL30488A3DR2G include?
The controller includes features such as cycle-by-cycle peak current limit, winding short-circuit protection, output under voltage protection, thermal shutdown, and brown-out protection.
- What is the maximum junction temperature for the NCL30488A3DR2G?
The maximum junction temperature is 150°C.
- How does the NCL30488A3DR2G achieve power factor correction?
The controller uses a proprietary concept to achieve high power factor correction and low THD while maintaining accurate constant current and constant voltage control.
- What is the typical current regulation accuracy of the NCL30488A3DR2G?
The typical current regulation accuracy is ±2%.
- Does the NCL30488A3DR2G support analog dimming?
Yes, the controller supports analog dimming.
- What is the operating temperature range for the NCL30488A3DR2G?
The operating temperature range is from -40°C to 125°C.
- What type of ESD protection does the NCL30488A3DR2G have?
The controller has ESD protection of up to 4 kV for HBM model (except HV pin) and 1.5 kV for HV pin.
