Overview
The L4981BD013TR is a Power Factor Corrector (PFC) controller IC produced by STMicroelectronics. Realized in BCD 60II technology, this device is designed to achieve a very high power factor of up to 0.99. It contains all the necessary control functions for designing high-efficiency power supplies with sinusoidal line current consumption. The L4981BD013TR can operate with mains voltages between 85V to 265V without any line switch, making it versatile for various applications. It features modulated frequency to optimize the size of the input filter and operates in average current-mode PWM, maintaining sinusoidal line current without slope compensation.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Frequency | 100kHz (typical), 85kHz to 115kHz (range) |
| Input Voltage Range | 85V to 265V |
| Output Voltage | 19.5V |
| Package Type | SOIC (Surface Mount) |
| Pins | 20 |
| Operating Temperature Range | -40°C to 125°C |
| Current Sense | Average Current Mode |
| Reference Voltage | Precise 2% on-chip reference (externally available) |
| Protection Features | Overvoltage, Overcurrent, Under-voltage lockout with hysteresis |
Key Features
- High power factor up to 0.99
- Modulated frequency to optimize input filter size
- Average current-mode PWM for minimum noise sensitivity
- High current bipolar and DMOS totem pole output
- Precise 2% on-chip reference (externally available)
- Under-voltage lockout with hysteresis and programmable turn-on
- Soft-start feature
- Overvoltage and overcurrent protection
- Limit line current distortion to < 5%
- Feed forward line and load regulation
Applications
The L4981BD013TR is primarily used in power management applications, particularly in designing high-efficiency power supplies that require sinusoidal line current consumption. It is suitable for systems that need to operate with universal input mains voltages.
Q & A
- What is the primary function of the L4981BD013TR?
The L4981BD013TR is a Power Factor Corrector (PFC) controller IC designed to achieve high power factor and sinusoidal line current consumption in power supplies.
- What is the operating frequency range of the L4981BD013TR?
The operating frequency range is typically 100kHz, with a range of 85kHz to 115kHz.
- What is the input voltage range for the L4981BD013TR?
The input voltage range is between 85V to 265V.
- What type of package does the L4981BD013TR come in?
The L4981BD013TR comes in a 20-pin SOIC (Surface Mount) package.
- What are the key protection features of the L4981BD013TR?
The device includes overvoltage, overcurrent, and under-voltage lockout with hysteresis as protection features.
- Does the L4981BD013TR support soft-start?
- What is the precision of the on-chip reference voltage?
The on-chip reference voltage has a precision of 2% and is externally available.
- What type of PWM mode does the L4981BD013TR operate in?
The L4981BD013TR operates in average current-mode PWM.
- What is the typical operating temperature range for the L4981BD013TR?
The operating temperature range is -40°C to 125°C.
- What are the main applications of the L4981BD013TR?
The L4981BD013TR is primarily used in power management applications, especially in high-efficiency power supplies.
