Overview
The NCP1653AP, produced by onsemi, is a compact and robust Power Factor Correction (PFC) controller designed for Continuous Conduction Mode (CCM) boost circuits. This controller operates at a fixed switching frequency, either 67 kHz or 100 kHz, depending on the variant. It is housed in an 8-pin DIP or SO-8 package, minimizing the number of external components and simplifying the CCM PFC implementation. The NCP1653AP is ideal for high-power applications where cost-effectiveness, reliability, and high power factor are crucial.
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 | % |
| Supply Voltage | 8.0 | - | 18 | V |
| UVLO Startup Threshold | 8.7 | - | 13.25 | V |
| UVLO Hysteresis | 4.0 | - | 4.55 | V |
| Operating Temperature | -40 | - | 125 | °C |
| Gate Drive Resistor (Output High) | 5.0 | - | 9.0 | Ω |
| Gate Drive Resistor (Output Low) | 2.0 | - | 6.6 | Ω |
Key Features
- IEC1000-3-2 Compliant
- Continuous Conduction Mode (CCM)
- Average Current-Mode or Peak Current-Mode Operation
- Constant Output Voltage or Follower Boost Operation
- Very Few External Components Required
- Fixed Switching Frequency: 67 kHz (NCP1653A) and 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 NCP1653AP?
The NCP1653AP is a Power Factor Correction (PFC) controller designed for Continuous Conduction Mode (CCM) boost circuits.
- What are the switching frequencies available for the NCP1653AP?
The NCP1653AP operates at fixed switching frequencies of either 67 kHz or 100 kHz, depending on the variant.
- What package types are available for the NCP1653AP?
The NCP1653AP is available in 8-pin DIP and SO-8 packages.
- What safety features does the NCP1653AP include?
The NCP1653AP includes features such as Overvoltage Protection (OVP), Undervoltage Protection (UVP), Overpower Limitation (OPL), and Thermal Shutdown.
- How does the follower boost mode benefit the PFC circuit?
The follower boost mode reduces the output voltage, which in turn reduces 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 hence the power factor of the circuit, and it also acts as a soft-start capacitor.
- What is the role of the Feedback pin (FB/SD)?
The Feedback pin receives a feedback current proportional to the PFC circuit output voltage for output regulation, overvoltage protection, and undervoltage protection.
- Is the NCP1653AP compliant with any specific standards?
Yes, the NCP1653AP is IEC1000-3-2 compliant.
- What is the operating temperature range of the NCP1653AP?
The operating temperature range is from -40°C to 125°C.
- Is the NCP1653AP a Pb-Free device?
Yes, the NCP1653AP is a Pb-Free device and is RoHS compliant.
