Overview
The NCP1616A1DR2G, produced by onsemi, is a high voltage, high efficiency Power Factor Correction (PFC) controller designed to optimize the efficiency of PFC stages across various load conditions. This controller incorporates innovative features such as Current Controlled Frequency Foldback (CCFF) and skip mode to maximize efficiency, especially at light loads. It is housed in a SOIC-10 package and includes an integrated high voltage start-up circuit, eliminating the need for external start-up components. The NCP1616A1DR2G is ideal for applications requiring high efficiency, low standby power, and robust protection features.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC-10 | |
| VCC Range | 9.5 to 30 | V |
| High Voltage Start-Up Circuit Input Voltage | -0.3 to 700 | V |
| Driver Maximum Current | -500 mA / +800 mA | A |
| Zero Current Detection and Current Sense Input Voltage | -0.3 to VCS/ZCD(MAX) | V |
| Thermal Shutdown Temperature | 150 | °C |
| Minimum On-Time (Low Line) | 200 ns | |
| Minimum On-Time (High Line) | 100 ns | |
| Line Overvoltage Threshold (NCP1616A1 only) | 236 Vdc |
Key Features
- Current Controlled Frequency Foldback (CCFF): Operates in critical conduction mode (CrM) and reduces frequency at light loads to maximize efficiency and minimize standby losses.
- Skip Mode: Skips cycles near the line zero crossing to avoid inefficient operation and reduce input current distortion.
- Integrated High Voltage Start-Up Circuit: Eliminates the need for external start-up components and reduces no-load power.
- Line Removal Detection Circuitry: Reduces input power by eliminating external resistors for discharging the input filter capacitor.
- Fast Line / Load Transient Compensation: Enhances dynamic response to prevent over or undervoltage conditions during start-up or load changes.
- Standby Mode Input: Allows the downstream converter to inhibit PFC drive pulses when the load is reduced.
- Safety Protections: Includes overcurrent protection, undervoltage protection, bulk undervoltage detection, brownout detection, thermal shutdown, and line overvoltage protection.
- Output Stage Totem Pole Driver: High drive capability of -500 mA / +800 mA to efficiently drive medium to high power MOSFETs.
Applications
- PC Power Supplies
- Off-line Appliances Requiring Power Factor Correction
- LED Drivers
- Flat TVs
Q & A
- What is the primary function of the NCP1616A1DR2G?
The NCP1616A1DR2G is a high voltage, high efficiency Power Factor Correction (PFC) controller designed to optimize the efficiency of PFC stages.
- What is the Current Controlled Frequency Foldback (CCFF) method?
CCFF is a method where the circuit operates in critical conduction mode (CrM) when the inductor current exceeds a programmable value and reduces frequency at light loads to maximize efficiency.
- What is the purpose of the integrated high voltage start-up circuit?
The integrated high voltage start-up circuit eliminates the need for external start-up components and reduces no-load power by using negligible power in normal operation.
- What safety features are included in the NCP1616A1DR2G?
The controller includes overcurrent protection, undervoltage protection, bulk undervoltage detection, brownout detection, thermal shutdown, and line overvoltage protection.
- What is the driver maximum current capability of the NCP1616A1DR2G?
The driver has a maximum current capability of -500 mA / +800 mA.
- What is the thermal shutdown temperature of the NCP1616A1DR2G?
The thermal shutdown temperature is 150°C.
- What are the typical applications of the NCP1616A1DR2G?
Typical applications include PC power supplies, off-line appliances requiring PFC, LED drivers, and flat TVs.
- What is the VCC range for the NCP1616A1DR2G?
The VCC range is from 9.5 V to 30 V.
- How does the skip mode function in the NCP1616A1DR2G?
The skip mode skips cycles near the line zero crossing to avoid inefficient operation and reduce input current distortion.
- What is the purpose of the line removal detection circuitry?
The line removal detection circuitry reduces input power by eliminating external resistors for discharging the input filter capacitor.
