Overview
The UCC28070APW is a two-phase interleaved Continuous Conduction Mode (CCM) Power Factor Correction (PFC) controller produced by Texas Instruments. This device is designed to operate over a wide frequency range of 10 kHz to 300 kHz, making it suitable for various high-power applications. The UCC28070APW features an interleaved operation that reduces input and output ripple currents, thereby simplifying EMI filtering and enabling higher power levels. It is particularly useful in applications requiring high efficiency, low Total Harmonic Distortion (THD), and robust performance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Case/Package | TSSOP | |
| Number of Pins | 20 | |
| Operating Frequency Range | 10 kHz to 300 kHz | |
| Max Operating Temperature | 125°C | |
| Min Operating Temperature | -40°C | |
| Max Supply Voltage | 21 V | |
| Min Supply Voltage | 10 V | |
| Max Supply Current | 20 mA | |
| Max Power Dissipation | 800 mW | |
| Topology | Boost | |
| RoHS Compliance | Yes | |
| Lead Free | Yes |
Key Features
- Extended Frequency Range: Operates from 10 kHz to 300 kHz, making it versatile for various power switch technologies including MOSFET and IGBT.
- Interleaved Operation: 180° out-of-phase operation reduces input and output ripple currents, simplifying EMI filtering and enabling higher power levels.
- High Efficiency: Features current synthesis and quantized voltage feedforward to enhance power factor, efficiency, and transient response.
- Protection Features: Includes output overvoltage detection, programmable peak-current limit, undervoltage lockout, and open-loop protection.
- Frequency Dithering and Synchronization: Supports frequency dithering and clock synchronization to enhance performance and reduce EMI.
- Soft-Start and Fault Interface: Includes a soft-start feature and an external fault interface for robust operation and fault handling.
Applications
- High-Efficiency Power Supplies: Suitable for server and desktop power supplies where high power factor and low THD are critical.
- Telecom Rectifiers: Used in telecom equipment for efficient power conversion.
- Large-Screen TVs and Displays: Ideal for power factor correction in consumer electronics such as TVs and displays.
- Industrial Equipment: Applied in various industrial power systems requiring high efficiency and reliability.
Q & A
- What is the operating frequency range of the UCC28070APW?
The UCC28070APW operates over a frequency range of 10 kHz to 300 kHz.
- What is the topology of the UCC28070APW?
The UCC28070APW uses a boost topology.
- Is the UCC28070APW RoHS compliant?
Yes, the UCC28070APW is RoHS compliant.
- What is the maximum operating temperature of the UCC28070APW?
The maximum operating temperature is 125°C.
- What are the key protection features of the UCC28070APW?
The device includes output overvoltage detection, programmable peak-current limit, undervoltage lockout, and open-loop protection.
- How does the interleaved operation benefit the system?
The interleaved operation reduces input and output ripple currents, simplifying EMI filtering and enabling higher power levels.
- What types of power switches can the UCC28070APW work with?
The UCC28070APW can work with both MOSFET and IGBT power switches.
- What is the purpose of frequency dithering in the UCC28070APW?
Frequency dithering helps in reducing EMI and enhancing performance by introducing a controlled variation in the switching frequency.
- Can multiple UCC28070APW controllers be synchronized?
Yes, multiple UCC28070APW controllers can be synchronized for use in higher-power applications requiring more than two interleaved power stages.
- What is the typical application of the UCC28070APW in consumer electronics?
The UCC28070APW is typically used in large-screen TVs and displays for efficient power factor correction.
