Overview
The NCL2801CDADR2G is a current mode CRM (Critical Conduction Mode) Boost PFC (Power Factor Correction) control IC developed by onsemi. This device is designed to provide high-efficiency power factor correction with near-unity power factor, even at reduced switching frequencies. It utilizes ON Semiconductor’s THD enhancer technique to achieve the best class THD (Total Harmonic Distortion) performance over an extended operating range. The IC also features the Valley Count Frequency Fold-back (VCFF) method, which enhances efficiency and reduces standby power consumption.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package Type | SOIC-8 | SOIC-8 |
| VCC Range | Operating voltage range | 10.5 V to 27 V |
| VCC Startup Level | Minimum voltage for startup | 12.5 V (for C & D options), 17.0 V (for A & B options), 10.5 V (for E & F options) |
| Drive Capability | Gate drive current | -500 mA / +800 mA |
| Switching Frequency | Variable, dependent on load | Variable |
| Topology | Step-Up | Step-Up |
| Control Mode | Current Mode | Current Mode |
| UVLO (Under Voltage Lock Out) | No | No |
| Thermal Shutdown | Maximum junction temperature | 150°C |
| ESD Protection | HBM model | > 2000 V |
Key Features
- Valley Count Frequency Fold-back (VCFF): Enhances efficiency and reduces standby power consumption by adjusting the switching frequency based on the load.
- Dynamic Response Enhancer: Drastically speeds up the loop response when the output voltage drops below 95.5% of the desired output level.
- THD Enhancer: Provides the best class THD performance over an extended operating range using ON Semiconductor’s THD enhancer technique.
- Line Level Feed-forward: Two-level line feed-forward for improved performance.
- Safety Features: Includes thermal shutdown, non-latching over-voltage protection, over-current limitation, and pin open/short protection.
- High Drive Capability: Totem pole gate drive with -500 mA / +800 mA capability.
Applications
- PC Power Supplies: Suitable for power factor correction in PC power supplies.
- Lighting Ballasts: Applicable for LED and fluorescent lighting ballasts.
- Flat TV: Used in flat TV power supplies for power factor correction).
- All Off-Line Appliances Requiring Power Factor Correction: General use in appliances that require high-efficiency power factor correction).
Q & A
- What is the primary function of the NCL2801CDADR2G IC?
The NCL2801CDADR2G is a current mode CRM Boost PFC control IC designed to provide high-efficiency power factor correction).
- What is the Valley Count Frequency Fold-back (VCFF) method?
The VCFF method adjusts the switching frequency based on the load to enhance efficiency and reduce standby power consumption).
- What are the key safety features of the NCL2801CDADR2G?
The IC includes thermal shutdown, non-latching over-voltage protection, over-current limitation, and pin open/short protection).
- What is the operating voltage range of the NCL2801CDADR2G?
The operating voltage range is from 10.5 V to 27 V).
- What is the gate drive capability of the NCL2801CDADR2G?
The gate drive capability is -500 mA / +800 mA).
- What are the typical applications of the NCL2801CDADR2G?
Typical applications include PC power supplies, lighting ballasts, flat TVs, and all off-line appliances requiring power factor correction).
- How does the Dynamic Response Enhancer work?
The Dynamic Response Enhancer drastically speeds up the loop response when the output voltage drops below 95.5% of the desired output level).
- What is the maximum junction temperature of the NCL2801CDADR2G?
The maximum junction temperature is 150°C).
- Does the NCL2801CDADR2G have ESD protection?
Yes, the device has ESD protection exceeding 2000 V for the HBM model).
- What is the package type of the NCL2801CDADR2G?
The package type is SOIC-8).
