Overview
The NCP1618ADR2G, produced by onsemi, is an innovative high-voltage, multimode power factor controller. This component is designed to optimize efficiency over a wide range of line and load conditions. It naturally transitions between different operation modes, including Continuous Conduction Mode (CCM), Discontinuous Conduction Mode (DCM), and Critical Conduction Mode (CrM), to ensure maximum efficiency. The NCP1618ADR2G is housed in a SOIC-9 package, making it suitable for robust and compact PFC (Power Factor Correction) stages with minimal external components.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| CCM Switching Frequency | 65 kHz (typical) | kHz |
| VCC Operating Range | 9.5 V to 35 V | V |
| High Voltage Start-Up Circuit Input Voltage | 0.3 V to 700 V | V |
| Maximum Junction Temperature | 150 °C | °C |
| Operating Temperature Range | -40 °C to +125 °C | °C |
| Driver Output Current | -0.5 A / +0.8 A | A |
| Feedback Voltage Reference | 2.46 V to 2.56 V | V |
| Zero Current Detection Source Current | -230 µA | µA |
Key Features
- Multimode Operation: Automatically transitions between CCM, DCM, and CrM to optimize efficiency over the line/load range.
- Fast Line/Load Transient Compensation: Dynamic Response Enhancer (DRE) speeds up the loop response when the output voltage drops.
- Protection Features: Includes soft- and fast-overvoltage protection, line-sag and brown-out detection, 2-level overcurrent detection, bulk under-voltage detection, and thermal shutdown.
- Line Range Detection: Detects and adjusts for different line voltages.
- pfcOK Signal: Enables/disables the downstream converter based on PFC output voltage.
- Jittering for EMI Filtering: Helps in easing EMI filtering.
- Soft-SKIP Mode: Minimizes losses in very light load conditions.
Applications
- PC Power Supplies: Ideal for power factor correction in PC power supplies.
- All Off-Line Appliances: Suitable for any off-line appliances requiring power factor correction.
Q & A
- What is the primary function of the NCP1618ADR2G?
The primary function of the NCP1618ADR2G is to act as a high-voltage, multimode power factor controller, optimizing efficiency over a wide range of line and load conditions.
- What are the different operation modes of the NCP1618ADR2G?
The NCP1618ADR2G operates in Continuous Conduction Mode (CCM), Discontinuous Conduction Mode (DCM), and Critical Conduction Mode (CrM).
- What is the VCC operating range of the NCP1618ADR2G?
The VCC operating range is from 9.5 V to 35 V.
- What protection features does the NCP1618ADR2G include?
The component includes soft- and fast-overvoltage protection, line-sag and brown-out detection, 2-level overcurrent detection, bulk under-voltage detection, and thermal shutdown.
- What is the purpose of the pfcOK signal?
The pfcOK signal is used to enable or disable the downstream converter based on the PFC output voltage reaching its nominal level.
- How does the NCP1618ADR2G handle very light load conditions?
In very light load conditions, the NCP1618ADR2G can enter the soft-SKIP mode to minimize losses.
- What is the maximum junction temperature for the NCP1618ADR2G?
The maximum junction temperature is 150 °C.
- What is the operating temperature range for the NCP1618ADR2G?
The operating temperature range is from -40 °C to +125 °C.
- What are typical applications for the NCP1618ADR2G?
Typical applications include PC power supplies and all off-line appliances requiring power factor correction.
- What package type is the NCP1618ADR2G available in?
The NCP1618ADR2G is available in a SOIC-9 package.
