Overview
The L4981AD013TR, produced by STMicroelectronics, is a high-performance power factor corrector (PFC) integrated circuit designed to achieve a very high power factor of up to 0.99. This device is realized in BCD 60II technology and contains all the necessary control functions for designing high-efficiency power supplies with sinusoidal line current consumption. It is suitable for systems operating with mains voltages between 85V to 265V without the need for line switching.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | L4981AD013TR |
| Manufacturer | STMicroelectronics |
| Package | SO-20 |
| Grade | Industrial |
| RoHS Compliance Grade | Ecopack2 |
| Operating Temperature (°C) | -40 to 150 |
| Input Voltage Range | 85V to 265V |
| Power Factor | Up to 0.99 |
| Start-up Current | 0.3mA (typ.) |
| Output Current Capability | High current bipolar and DMOS totem pole output |
Key Features
- Precise 2% on-chip reference externally available
- Overvoltage and overcurrent protection
- Soft start
- High current bipolar and DMOS totem pole output
- Average current mode PWM for minimum noise sensitivity
- Under voltage lockout with hysteresis and programmable turn-on threshold
- Feed forward line and load regulation
- Universal input mains compatibility
- Limit line current distortion to < 5%
Applications
The L4981AD013TR is ideal for high-efficiency power supply designs, particularly in applications requiring high power factor correction such as:
- Switch-mode power supplies
- AC-DC converters
- Power adapters
- Industrial power supplies
- Aerospace and automotive systems where high reliability and efficiency are critical
Q & A
- What is the primary function of the L4981AD013TR?
The primary function of the L4981AD013TR is to act as a power factor corrector (PFC) to achieve a high power factor of up to 0.99 in power supply designs. - What is the operating voltage range of the L4981AD013TR?
The L4981AD013TR operates with mains voltages between 85V to 265V. - What type of package does the L4981AD013TR come in?
The L4981AD013TR comes in an SO-20 package. - What are the key protection features of the L4981AD013TR?
The key protection features include overvoltage and overcurrent protection, under voltage lockout with hysteresis, and soft start. - What is the typical start-up current of the L4981AD013TR?
The typical start-up current is 0.3mA. - What is the significance of the average current mode PWM in the L4981AD013TR?
The average current mode PWM minimizes noise sensitivity and helps in maintaining sinusoidal line current without slope compensation. - Can the L4981AD013TR be used in industrial applications?
Yes, the L4981AD013TR is suitable for industrial applications due to its high reliability and efficiency. - How does the L4981AD013TR limit line current distortion?
The L4981AD013TR limits line current distortion to less than 5%. - What is the RoHS compliance grade of the L4981AD013TR?
The RoHS compliance grade of the L4981AD013TR is Ecopack2. - What are the operating temperature ranges for the L4981AD013TR?
The operating temperature range is from -40°C to 150°C.
