Overview
The NCP1651DR2G, produced by onsemi, is an active power factor correction (PFC) controller designed for use in 50/60 Hz power systems. It is a fixed frequency controller that can operate in both continuous and discontinuous conduction modes, making it suitable for isolated AC-DC converters with mid-to-high output voltage requirements. This controller helps in achieving unity power factor and complies with IEC1000-3-2 harmonic requirements for converters in the range of 50 W to 250 W.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Oscillator Frequency (Tj = -40°C to +125°C) | 90 | 100 | 110 | kHz |
| Max Duty Cycle | - | - | 0.95 | - |
| Ramp Peak Voltage | - | - | 4.0 | V |
| Ramp Compensation Current | - | - | 150 | μA |
| AC Error Amplifier Input Offset Voltage | -20 | - | - | mV |
| Drive Output Source Resistance (1.0 Volt Drop) | - | - | 15 | Ω |
| Drive Output Sink Resistance (1.0 Volt Drop) | - | - | 15 | Ω |
| Rise Time (CL = 1.0 nF) | - | - | 50 | ns |
| Fall Time (CL = 1.0 nF) | - | - | 50 | ns |
| Voltage Reference Output (Iload = 0 mA, VCC = 12 VDC) | 6.24 | 6.50 | 6.76 | V |
Key Features
- Fixed Frequency Operation
- Average Current Mode PWM
- Internal High Voltage Startup Circuit
- Continuous or Discontinuous Mode Operation
- High Accuracy Multiplier
- Overtemperature Shutdown
- External Shutdown
- Undervoltage Lockout
- Low Cost/Parts Count Solution
- Ramp Compensation Does Not Affect Oscillator Accuracy
- Pb-Free Device
Applications
- High Current Battery Chargers
- Front Ends for Distributed Power Systems
Q & A
- What is the primary function of the NCP1651DR2G?
The NCP1651DR2G is an active power factor correction (PFC) controller designed to improve the power factor of AC-DC converters.
- What are the operating modes of the NCP1651DR2G?
The NCP1651DR2G can operate in both continuous and discontinuous conduction modes.
- What is the typical oscillator frequency range of the NCP1651DR2G?
The oscillator frequency range is typically between 90 kHz to 110 kHz.
- What is the maximum duty cycle of the NCP1651DR2G?
The maximum duty cycle is 0.95.
- Does the NCP1651DR2G have built-in overtemperature protection?
- What is the voltage range for the high voltage startup pin?
The high voltage startup pin (Pin 16) is rated up to 500 V.
- What is the purpose of the internal high voltage startup circuit?
The internal high voltage startup circuit provides initial power to the device during startup.
- What are the typical applications of the NCP1651DR2G?
Typical applications include high current battery chargers and front ends for distributed power systems.
- Is the NCP1651DR2G a Pb-Free device?
- What is the package type of the NCP1651DR2G?
The NCP1651DR2G is available in a SOIC-16 package.
