Overview
The NCL2801CFADR2G 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 and Valley Count Frequency Fold-back (VCFF) method to enhance efficiency and reduce standby power losses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC Range | 10.5 - 27 | V |
| Drive Capability | -500 mA / +800 mA | mA |
| Start-Up Threshold | 9.75 - 15.6 | V |
| Minimum Operating Voltage | 8.4 - 10.7 | V |
| Package Type | SOIC-8 | |
| Maximum Junction Temperature | 150 | °C |
| Maximum Power Dissipation | 300 | mW |
| Thermal Resistance Junction to Air | 180 | °C/W |
Key Features
- Near-unity power factor
- Critical Conduction Mode (CrM) operation
- Valley Count Frequency Fold-back (VCFF) method for efficiency and reduced standby losses
- Dynamic Response Enhancer for fast line and load transient compensation
- Brown-out detection and thermal shutdown
- Two-level line feed-forward
- High drive capability: -500 mA / +800 mA
- Non-latching, over-voltage protection (OVP) with three programmable levels
- Over current limitation and pin open/short protection
Applications
- PC Power Supplies
- Lighting Ballasts (LED, Fluorescent)
- Flat TV
- All off-line appliances requiring power factor correction
Q & A
- What is the primary function of the NCL2801CFADR2G? The NCL2801CFADR2G is a current mode CRM Boost PFC control IC designed to provide high-efficiency power factor correction.
- What is the operating VCC range of the NCL2801CFADR2G? The VCC range is from 10.5 V to 27 V.
- What is the drive capability of the NCL2801CFADR2G? The drive capability is -500 mA / +800 mA.
- What is the Valley Count Frequency Fold-back (VCFF) method used for? The VCFF method is used to maximize efficiency during discontinuous conduction mode and reduce standby losses.
- Does the NCL2801CFADR2G have over-voltage protection? Yes, it has non-latching, over-voltage protection (OVP) with three programmable levels.
- What are the typical applications of the NCL2801CFADR2G? Typical applications include PC power supplies, lighting ballasts, flat TVs, and all off-line appliances requiring power factor correction.
- What is the package type of the NCL2801CFADR2G? The package type is SOIC-8.
- What is the maximum junction temperature of the NCL2801CFADR2G? The maximum junction temperature is 150°C.
- Does the NCL2801CFADR2G have thermal shutdown protection? Yes, it includes thermal shutdown protection.
- How does the Dynamic Response Enhancer work in the NCL2801CFADR2G? The Dynamic Response Enhancer speeds up the loop response when the output voltage drops below 95.5% of the desired output level.
