L4981BD013TR vs UCC28061QDRQ1
| Part Number |
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| Category | PMIC - PFC (Power Factor Correction) | PMIC - PFC (Power Factor Correction) |
| Manufacturer | STMicroelectronics | Texas Instruments |
| Description | IC PFC CTR AVER CURR 100KHZ 20SO | IC PFC CTR TRANS 45KHZ 16SOIC |
| Package | Bulk | Tube |
| Series | - | Automotive, AEC-Q100, Natural Interleaving™ |
| Voltage - Supply | 14.5V ~ 19.5V | 14V ~ 21V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 20-SOIC (0.295\", 7.50mm Width) | 16-SOIC (0.154\", 3.90mm Width) |
| Supplier Device Package | 20-SO | 16-SOIC |
| Frequency - Switching | 100kHz | 45kHz |
| Mode | Average Current | Discontinuous (Transition) |
| Current - Startup | 100 µA | 100 µA |
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1. What is Power Factor Correction (PFC)?
Power Factor Correction (PFC) is a technology used to improve the power factor of a power system, that is, the ratio of actual power to apparent power, to improve energy efficiency and reduce the burden on the power grid.
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2. Why is active PFC more commonly used than passive PFC?
Active PFC can provide higher power factor over a wider load range, effectively handle harmonics, has higher efficiency and smaller size, and is therefore more common in modern power supply designs.
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3. How to choose a suitable PFC IC?
The selection should consider the system's power requirements, input voltage range, expected power factor, efficiency requirements, and whether integrated protection functions are required.
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4. How to test the performance of a PFC IC?
Performance testing usually involves measuring input and output voltage and current, power factor, efficiency, and harmonic distortion. Using an oscilloscope and power analyzer can help evaluate its performance under different load conditions.
