Overview
The UCC25600DR, produced by Texas Instruments, is a high-performance resonant mode LLC (Inductor-Inductor-Capacitor) controller designed for DC-DC applications using resonant topologies, particularly the LLC half-bridge resonant converter. This highly integrated controller is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) and is notable for its ability to simplify system design and layout while reducing overall system cost. It supports switching frequencies from 40 kHz to 350 kHz and includes features such as frequency modulation control, programmable dead time, and soft-start timer, which enhance system efficiency and design flexibility.
Key Specifications
| Parameter | Specification |
|---|---|
| Package | SOIC 8-Pin |
| Operating Temperature Range | –40°C to 125°C |
| Switching Frequency Range | 40 kHz to 350 kHz |
| Minimum Switching Frequency Accuracy | 4% (3% at –20°C to 105°C) |
| Gate Driver Capability | 0.4-A source, 0.8-A sink |
| Protection Features | Overcurrent, UVLO, bias supply OVP, overtemperature protection |
Key Features
- Variable Switching Frequency Control: Supports switching frequencies from 40 kHz to 350 kHz with programmable minimum and maximum frequencies.
- Programmable Dead Time and Soft-Start Timer: Enables zero-voltage switching with minimum magnetizing current and maximizes design flexibility.
- Integrated Gate Driver: Includes two gate drivers with 0.4-A source and 0.8-A sink capability to directly drive the gate-driver transformer.
- System Protection Functions: Overcurrent, undervoltage lockout (UVLO), bias supply overvoltage protection (OVP), and overtemperature protection.
- High Efficiency and Simplified Design: Enhances system efficiency and simplifies system design and layout, reducing overall system cost.
Applications
- Power Supplies: Suitable for power supplies ranging from 100W to 1kW.
- Consumer Electronics: Used in LCD, Plasma, and DLP® TVs, home audio systems, and electronic lighting ballasts.
- Computing and Adapters: Applicable in computing power supplies, ATX power supplies, and AC-DC adapters.
Q & A
- What is the UCC25600DR used for?
The UCC25600DR is used for DC-DC applications using resonant topologies, especially the LLC half-bridge resonant converter.
- What is the operating temperature range of the UCC25600DR?
The operating temperature range is –40°C to 125°C.
- What are the key protection features of the UCC25600DR?
The key protection features include overcurrent, UVLO, bias supply OVP, and overtemperature protection.
- What is the switching frequency range of the UCC25600DR?
The switching frequency range is from 40 kHz to 350 kHz.
- Does the UCC25600DR have integrated gate drivers?
Yes, it includes two gate drivers with 0.4-A source and 0.8-A sink capability.
- What are some common applications of the UCC25600DR?
Common applications include power supplies, consumer electronics like TVs and home audio systems, and computing power supplies.
- How does the UCC25600DR simplify system design?
The UCC25600DR simplifies system design by integrating complete system functions in an 8-pin package, reducing the need for additional components and improving time to market.
- What is the significance of the programmable dead time and soft-start timer in the UCC25600DR?
The programmable dead time and soft-start timer enable zero-voltage switching with minimum magnetizing current and maximize design flexibility, respectively.
- Does the UCC25600DR support high efficiency in LLC resonant converters?
Yes, it supports high efficiency in LLC resonant converters by ensuring precise gate-driver signals and minimizing over-design of the power stage.
- Are there any evaluation modules available for the UCC25600DR?
Yes, there are evaluation modules such as the UCC25600EVM, which is a 300 W LLC resonant half-bridge converter.
