Overview
The NCP1653ADR2G, produced by onsemi, is a Power Factor Correction (PFC) boost controller designed to operate in fixed-frequency Continuous Conduction Mode (CCM). This controller is ideal for high-power applications where cost-effectiveness, reliability, and high power factor are crucial. It is available in an 8-pin DIP or SOIC package, minimizing the number of external components and simplifying the design of PFC stages.
The NCP1653ADR2G supports both average current-mode and peak current-mode operation, and it can operate in either constant output voltage or follower boost modes. The follower boost mode allows for a significant reduction in the size and cost of the inductor and power MOSFET by adjusting the output voltage based on the RMS input voltage or load demand.
Key Specifications
| Characteristics | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Switching Frequency (NCP1653) | 90 | 100 | 110 | kHz |
| Switching Frequency (NCP1653A) | 60.3 | 67 | 73.7 | kHz |
| Maximum Duty Cycle (VM = 0 V) | - | - | 94% | % |
| Gate Drive Resistor (Output High) | 5.0 | - | 9.0 | Ω |
| Gate Drive Resistor (Output Low) | 2.0 | - | 6.6 | Ω |
| Overvoltage Protection Threshold | 104 | - | 107% | % of Nominal Output Level |
| Undervoltage Protection Activate Threshold | 4.0 | - | 8.0% | % of Nominal Output Level |
| Supply Voltage (VCC) | 8.7 | - | 14.5 | V |
| Thermal Shutdown Temperature | 120 | - | 150°C | °C |
Key Features
- IEC1000-3-2 Compliant
- Continuous Conduction Mode (CCM) operation
- Average Current-Mode or Peak Current-Mode operation
- Constant Output Voltage or Follower Boost Operation
- Fixed Switching Frequency: 67 kHz (NCP1653A) or 100 kHz (NCP1653)
- Soft-Start Capability
- VCC Undervoltage Lockout with Hysteresis (8.7 / 13.25 V)
- Overvoltage Protection (107% of Nominal Output Level)
- Undervoltage Protection or Shutdown (8% of Nominal Output Level)
- Programmable Overcurrent Protection
- Programmable Overpower Limitation
- Thermal Shutdown with Hysteresis (120 / 150°C)
- Pb-Free Device
Applications
- TV & Monitors
- PC Desktop SMPS
- AC Adapters SMPS
- White Goods
Q & A
- What is the primary function of the NCP1653ADR2G?
The NCP1653ADR2G is a Power Factor Correction (PFC) boost controller designed for Continuous Conduction Mode (CCM) operation.
- What are the switching frequencies for the NCP1653 and NCP1653A?
The NCP1653 operates at a fixed switching frequency of 100 kHz, while the NCP1653A operates at 67 kHz.
- What protection features does the NCP1653ADR2G include?
The device includes Overvoltage Protection (OVP), Undervoltage Protection (UVP), Overpower Limitation (OPL), and Thermal Shutdown.
- How does the follower boost mode benefit the design?
The follower boost mode reduces the output voltage, thereby reducing the size and cost of the inductor and power MOSFET.
- What is the purpose of the Vcontrol pin?
The Vcontrol pin directly controls the input impedance and power factor of the circuit and also serves as a soft-start capacitor.
- What is the significance of the FB/SD pin?
The FB/SD pin receives a feedback current proportional to the PFC circuit output voltage for output regulation, overvoltage protection, and undervoltage protection.
- How does the device handle overcurrent protection?
The device includes programmable overcurrent protection, which can be set according to specific application requirements.
- What is the thermal shutdown temperature range for the NCP1653ADR2G?
The thermal shutdown temperature range is between 120°C and 150°C with hysteresis.
- Is the NCP1653ADR2G a Pb-Free device?
Yes, the NCP1653ADR2G is a Pb-Free device.
- What are some typical applications for the NCP1653ADR2G?
Typical applications include TV & Monitors, PC Desktop SMPS, AC Adapters SMPS, and White Goods.
