Introduction
In today's industrial landscape, where energy efficiency demands continue to rise, power factor correction (PFC) technology has become a core element of modern power supply design. Fantastichip has introduced the FAN6631 PFC controller, which adopts a multi-mode adaptive architecture to effectively address the technical challenges of traditional PFC circuits, such as efficiency fluctuations across wide load ranges and difficulty in controlling electromagnetic interference (EMI). Combined with an intelligent load-tracking algorithm, it optimizes efficiency across the entire operational range, from light load to full load.
Fantastichip FAN6631
The Fantastichip FAN6631 is a high-performance, highly integrated multi-mode power factor correction (PFC) controller designed specifically for Boost PFC converters. This chip features high efficiency, low total harmonic distortion (THD), and excellent EMI performance, making it an outstanding choice for high-power conversion applications.
The FAN6631 supports three operating modes: Continuous Conduction Mode (CCM), Critical Conduction Mode (CRM), and Discontinuous Conduction Mode (DCM). CCM mode effectively reduces inductor current peaks, improving the utilization of magnetic components, while DCM mode intelligently adjusts switching frequency based on load variations to optimize efficiency during low-current operation. Within a single AC line cycle, these three modes can adaptively switch, achieving high-efficiency conversion across the entire load range.
This chip integrates an active bridge driver function to reduce rectification losses on the AC input side. It also supports X-Cap discharge functionality, enhancing safety while reducing the number of external components. Additionally, the FAN6631 allows users to configure CCM mode activation thresholds via external resistors to further optimize system efficiency. In terms of EMI performance, the FAN6631 incorporates CCM jitter technology, significantly reducing electromagnetic interference. Furthermore, the chip includes a comprehensive set of protection mechanisms, such as cycle-by-cycle overcurrent protection (OCP), overpower limitation (OLP), undervoltage lockout (UVLO), internal over-temperature protection (OTP), and input/output overvoltage protection (OVP), ensuring stable and safe operation under various conditions.
The FAN6631 is widely used in AC/DC adapters, PD fast chargers, PC power supplies, all-in-one computer power supplies, television power supplies, LED lighting, as well as industrial and medical power management systems. Its SOP-8 package offers excellent compatibility and design flexibility, making it suitable for various power levels.
Fantastichip FAN6631 Solution Selection
ChargerLAB has introduced multiple power supply solutions featuring the Fantastichip FAN6631, covering power ranges from 145W to 600W. These solutions cater to PD fast chargers, LED lighting power supplies, PC power supplies, and AC/DC adapters, achieving peak efficiency of up to 95.6% under full load. The solutions utilize Fantastichip’s in-house components, offering advantages in power density and conversion efficiency while helping to reduce development costs and time.
We will now provide a brief introduction to these solutions.
Fantastichip FAN6631 Solution Overview
Fantastichip FAN6631 145W PD Fast Charger Solution
- Chip Configuration: FAN6631 (PFC) + FAN6886 (LLC) + FAN6225 (SR)
- Rated Output Power: 145W
- Input Voltage: 90~265Vac
- Output Voltage/Current: 29V/5A
- Efficiency: 95.5% @ full load 230Vac
- Topology: PFC + LLC + SR
- Dimensions (mm): 69.46 x 68.83 x 21.93
- Weight: 140.4g
Fantastichip FAN6631 150W LED Lighting Power Supply Solution
- Chip Configuration: FAN6631 (PFC) + FAN6887/8 (LLC)
- Rated Output Power: 150W
- Input Voltage: 90~305Vac
- Output Voltage/Current: 143V/1.05A
- Efficiency: 93.5% @ full load 230Vac
- Topology: PFC + LLC
- Dimensions (mm): 131.01 x 44.94 x 24.6
- Weight: 160.9g
Fantastichip FAN6631 240W PC Power Supply Solution
- Chip Configuration: FAN6631 (PFC) + FAN6887/8 (LLC) + FAN6225 (SR)
- Rated Output Power: 240W
- Input Voltage: 90~265Vac
- Output Voltage/Current: 12V/20A
- Efficiency: 94.2% @ full load 230Vac
- Topology: PFC + LLC + SR
- Dimensions (mm): 160.03 x 56.52 x 30.22
- Weight: 257.6g
Fantastichip FAN6631 600W High-Efficiency AC/DC Adapter Solution
- Chip Configuration: FAN6631 (PFC) + FAN6887/8 (LLC) + FAN6225 (SR)
- Rated Output Power: 600W
- Input Voltage: 90~265Vac
- Output Voltage/Current: 24V/25A
- Efficiency: 95.6% @ full load 230Vac
- Topology: PFC + LLC + SR
- Dimensions (mm): 196.9 x 64.93 x 35.63
- Weight: 529.1g
Summary of ChargerLAB
As a PFC control solution adaptable to multiple application scenarios, the Fantastichip FAN6631 demonstrates extensive technological versatility. From PD fast charging to LED lighting, PC power supplies, and AC/DC adapters, the FAN6631’s flexible design and multi-functional integration enable it to meet the needs of different power levels and complex operating conditions.
From a technological advancement perspective, the value of the FAN6631 lies in three key aspects:
Its dynamic mode-switching mechanism optimizes efficiency across the full load range, improving typical operating efficiency by 2-3 percentage points.
Its intelligent frequency modulation technique ensures a more uniform EMI spectrum distribution, reducing the complexity of filter design.
Its modular design concept supports rapid solution migration, allowing seamless adaptation from 45W to 600W power ranges through simple parameter adjustments.
With the proliferation of USB PD3.1, GaN power devices, and other emerging technologies, this forward-thinking PFC controller is poised to play an increasingly crucial role in smart power system architectures, providing reliable technological support for energy conversion in the Industry 4.0 era.
