Overview
The UCC2806DW, produced by Texas Instruments, is a low-power, dual-output, current-mode PWM (Pulse Width Modulation) controller. This device is part of the UCC3806 family, which offers improved performance with a familiar architecture similar to the UC3846 series. It features increased switching frequency capability and significantly reduced bias current, making it suitable for a wide range of applications, from off-line power supplies to battery-operated portable equipment.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 16-SOIC (0.295", 7.50mm Width) |
| Operating Temperature Range | -40°C to 85°C |
| Maximum Operating Current | 1.4 mA |
| Startup Current | 100 µA (max), 50 µA (typical) |
| Peak Output Current | ±0.5 A |
| Circuit Delay | 125 ns |
| Switching Frequency | 47 kHz |
| Voltage - Supply (Vcc/Vdd) | 8 V ~ 14.5 V |
| Duty Cycle (Max) | 50% |
| Topology | Boost, Flyback, Forward Converter |
| Number of Outputs | 2 |
| Output Configuration | Positive, Isolation Capable |
| Control Features | Current Limit, Enable, Frequency Control |
Key Features
- BiCMOS version of the UC3846 family, offering improved performance with a familiar architecture.
- Low power consumption with a maximum operating current of 1.4 mA and a startup current of 100 µA (max), 50 µA (typical).
- Dual high-current MOSFET driving outputs.
- Fast current sense loop.
- Easier parallelability with current sharing.
- Benefits of current mode control, including simpler loop closing, voltage feed-forward, pulse-by-pulse current limiting, and push-pull symmetry correction.
Applications
The UCC2806DW is versatile and can be used in various applications, including:
- Off-line power supplies.
- Battery-operated portable equipment.
- Boost, flyback, and forward converters.
- High-efficiency DC-DC converters.
Q & A
- What is the operating temperature range of the UCC2806DW?
The operating temperature range is -40°C to 85°C.
- What is the maximum operating current of the UCC2806DW?
The maximum operating current is 1.4 mA.
- What is the typical startup current of the UCC2806DW?
The typical startup current is 50 µA.
- What is the peak output current of the UCC2806DW?
The peak output current is ±0.5 A.
- What is the switching frequency of the UCC2806DW?
The switching frequency is 47 kHz.
- What are the benefits of current mode control in the UCC2806DW?
The 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 typical applications of the UCC2806DW?
Typical applications include off-line power supplies, battery-operated portable equipment, and high-efficiency DC-DC converters.
- What package options are available for the UCC2806DW?
The device is available in a 16-SOIC package.
- Is the UCC2806DW RoHS compliant?
Yes, the UCC2806DW is RoHS compliant.
- What is the voltage supply range for the UCC2806DW?
The voltage supply range is 8 V to 14.5 V.
