Overview
The UCC2806DWTR is a low-power, dual-output, current-mode PWM (Pulse Width Modulation) controller manufactured by Texas Instruments. This device is part of the UCC3806 family, which offers improved performance with a familiar architecture similar to the UC3846 series. The UCC2806DWTR is designed for a wide range of applications, from off-line power supplies to battery-operated portable equipment, due to its low startup current and well-defined voltage threshold for turn-on.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | 16-SOIC (0.295", 7.50mm Width) |
| Operating Temperature Range (°C) | -40 to 85 |
| Supply Voltage (Vcc/Vdd) | 8 V ~ 14.5 V |
| Switching Frequency | 47 kHz |
| Maximum Operating Current | 1.4 mA |
| Maximum Startup Current | 100 µA |
| Peak Output Current | ±0.5 A |
| Circuit Delay | 125 ns |
| Output Configuration | Positive, Isolation Capable |
| Topology | Boost, Flyback, Forward Converter |
| Number of Outputs | 2 |
| Duty Cycle (Max) | 50% |
| Synchronous Rectifier | Yes |
Key Features
- BiCMOS version of the UC3846 families, offering improved performance and reduced bias current.
- Low maximum operating current of 1.4 mA and startup current of 100 µA.
- Dual high current, MOSFET driving outputs.
- Fast current sense loop.
- Easier parallelability and improved benefits of current mode control.
- Simpler loop closing, voltage feed-forward, parallelability with current sharing, pulse-by-pulse current limiting, and push-pull symmetry correction.
Applications
The UCC2806DWTR is suitable for a variety of applications, including:
- Off-line power supplies.
- Battery-operated portable equipment.
- Boost, flyback, and forward converters.
- Step-up and step-up/step-down configurations.
Q & A
- What is the operating temperature range of the UCC2806DWTR?
The operating temperature range is -40°C to 85°C.
- What is the typical startup current of the UCC2806DWTR?
The typical startup current is 50 µA.
- What are the key benefits of using the UCC2806DWTR?
The key benefits include simpler loop closing, voltage feed-forward, parallelability with current sharing, pulse-by-pulse current limiting, and push-pull symmetry correction.
- What are the output configurations supported by the UCC2806DWTR?
The device supports positive and isolation-capable output configurations.
- What is the maximum peak output current of the UCC2806DWTR?
The maximum peak output current is ±0.5 A.
- What is the switching frequency of the UCC2806DWTR?
The switching frequency is 47 kHz.
- What package options are available for the UCC2806DWTR?
The device is available in a 16-SOIC package.
- Is the UCC2806DWTR suitable for high-frequency applications?
Yes, it is capable of operating at higher switching frequencies compared to its predecessors.
- What are the typical applications of the UCC2806DWTR?
Typical applications include off-line power supplies and battery-operated portable equipment.
- Does the UCC2806DWTR support synchronous rectification?
Yes, it supports synchronous rectification.
