Overview
The UC2854DWTR, produced by Texas Instruments, is a bipolar Continuous Conduction Mode (CCM) Power Factor Correction (PFC) controller. This device is designed to optimize power factor in power systems, ensuring that the current drawn from the power line is sinusoidal and minimizing line-current distortion. The UC2854DWTR supports line frequencies ranging from 50Hz to 400Hz and operates within a temperature range of –40°C to 85°C. It is packaged in a 16-pin SOIC (DW) package, making it suitable for various power supply applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (DW) | - |
| Pins | 16 | - |
| Operating Temperature Range | –40°C to 85°C | °C |
| Supply Voltage Min | 14.5 V | V |
| Supply Voltage Max | 35 V | V |
| Startup Current | 1.5 mA | mA |
| Operating Supply Current | 10 mA | mA |
| Switching Frequency | 200 kHz | kHz |
| Mounting Type | Surface Mount | - |
Key Features
- Control Boost PWM to achieve a power factor of up to 0.99
- Limit line-current distortion to less than 5%
- World-wide operation without switches
- Feedforward line regulation
- Average current-mode control for fixed-frequency current control with stability and low distortion
- Low noise sensitivity
- Low startup supply current
- Fixed-frequency PWM drive
- Low-offset analog multiplier and divider
- 1-A totem-pole gate driver
- Precision voltage reference (7.5 V)
Applications
The UC2854DWTR is used in various power supply systems, including single-phase and three-phase configurations, to achieve high power factor correction. It is suitable for applications with line voltages ranging from 75 V to 275 V and line frequencies from 50 Hz to 400 Hz. This device is particularly useful in power supplies for industrial equipment, consumer electronics, and any system requiring efficient and sinusoidal current draw from the power line.
Q & A
- What is the primary function of the UC2854DWTR?
The primary function of the UC2854DWTR is to provide active-power factor correction in power systems, ensuring that the current drawn from the power line is sinusoidal and minimizing line-current distortion.
- What is the operating temperature range of the UC2854DWTR?
The UC2854DWTR operates within a temperature range of –40°C to 85°C.
- What is the switching frequency of the UC2854DWTR?
The switching frequency of the UC2854DWTR is up to 200 kHz.
- What type of control does the UC2854DWTR use?
The UC2854DWTR uses average current-mode control for fixed-frequency current control with stability and low distortion.
- What is the supply voltage range for the UC2854DWTR?
The supply voltage range for the UC2854DWTR is from 14.5 V to 35 V.
- What is the startup current of the UC2854DWTR?
The startup current of the UC2854DWTR is 1.5 mA.
- What type of package does the UC2854DWTR come in?
The UC2854DWTR comes in a 16-pin SOIC (DW) package.
- Is the UC2854DWTR suitable for surface mounting?
Yes, the UC2854DWTR is suitable for surface mounting.
- What are some key features of the UC2854DWTR?
Key features include control of boost PWM for high power factor, low line-current distortion, feedforward line regulation, and a precision voltage reference.
- In what types of systems is the UC2854DWTR typically used?
The UC2854DWTR is typically used in single-phase and three-phase power supply systems, including industrial equipment and consumer electronics.
- What is the significance of the 7.5 V reference voltage in the UC2854DWTR?
The 7.5 V reference voltage is a precision voltage reference that helps in maintaining stable and accurate control functions within the device.
