Overview
The NCL2801CDBDR2G 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 onsemi’s THD enhancer technique and Valley Count Frequency Fold-back (VCFF) method to enhance efficiency and reduce standby power losses. The IC is particularly suited for applications requiring high THD performance over an extended operating range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOIC-8 | |
| VCC Range | 10.5 to 27 | V |
| VCC Startup Level | 12.5 / 17.0 / 10.5 | V |
| Drive Capability | -500 mA / +800 mA | mA |
| UVLO (Under Voltage Lock Out) | 9.3 to 11.6 | V |
| Maximum Junction Temperature | 150 | °C |
| Maximum Power Dissipation | 300 | mW |
| Thermal Resistance Junction to Air | 180 | °C/W |
Key Features
- Valley Count Frequency Fold-back (VCFF): Enhances efficiency and reduces standby power losses.
- Dynamic Response Enhancer: Drastically speeds up the loop response when the output voltage drops below 95.5% of the desired output level.
- Soft/Fast OVP (Over-Voltage Protection): Non-latching OVP with programmable levels.
- THD Enhancer: Provides best-in-class THD performance.
- Line Level Feed-forward: Two-level line feed-forward for improved performance.
- Protections: Brown-out detection, thermal shutdown, over-current limitation, pin open/short protection, and more.
- High Drive Capability: Totem pole gate drive with -500 mA / +800 mA capability.
Applications
- PC Power Supplies: Ideal for power factor correction in PC power supplies.
- Lighting Ballasts: Suitable for LED and fluorescent lighting applications.
- Flat TV: Used in flat TV power supplies for efficient power factor correction.
- All Off-Line Appliances Requiring Power Factor Correction: General use in appliances needing high-efficiency power factor correction.
Q & A
- What is the primary function of the NCL2801CDBDR2G IC?
The primary function of the NCL2801CDBDR2G IC is to provide high-efficiency power factor correction (PFC) in boost converter applications.
- What is the Valley Count Frequency Fold-back (VCFF) method?
The VCFF method is an innovative technique that enhances efficiency and reduces standby power losses by adjusting the switching frequency based on the load conditions.
- What are the key protections offered by the NCL2801CDBDR2G?
The IC offers protections such as brown-out detection, thermal shutdown, over-current limitation, pin open/short protection, and non-latching over-voltage protection.
- What is the operating VCC range of the NCL2801CDBDR2G?
The operating VCC range is from 10.5 V to 27 V.
- What is the drive capability of the NCL2801CDBDR2G?
The IC has a high drive capability of -500 mA / +800 mA.
- What are the typical applications of the NCL2801CDBDR2G?
Typical applications include PC power supplies, lighting ballasts (LED and fluorescent), 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 NCL2801CDBDR2G?
The maximum junction temperature is 150°C.
- What is the thermal resistance junction to air for the NCL2801CDBDR2G?
The thermal resistance junction to air is 180°C/W.
- Is the NCL2801CDBDR2G a Pb-free device?
Yes, the NCL2801CDBDR2G is a Pb-free device.
