Overview
The UCC28700DBVR, manufactured by Texas Instruments, is a highly efficient AC/DC converter designed for applications requiring constant voltage (CV) and constant current (CC) regulation. This device is particularly suitable for low-power AC/DC switch-mode power supplies (SMPS) such as adapters, chargers, and other power management systems. Its primary market positioning targets designers of compact, energy-efficient power solutions, especially in consumer electronics and industrial applications. The UCC28700DBVR stands out for its primary-side regulation (PSR) technology, eliminating the need for an optocoupler, which simplifies design and reduces costs while maintaining high efficiency and reliability.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Manufacturer | Texas Instruments | - | - |
| Category | AC/DC Converter | - | - |
| Topology | Flyback | - | - |
| Output Voltage | 14 | V | - |
| Input Voltage Range | 9 - 35 | V | - |
| Switching Frequency | 875 Hz - 140 kHz | Hz | - |
| Maximum Duty Cycle | 99 | % | - |
| Operating Current | 2.1 | mA | - |
| Output Current | 25 | mA | - |
| Operating Temperature | -20 to +125 | °C | - |
| Package | SOT-23-6 | - | - |
| Isolation | Isolated | - | - |
Key Features
- Primary-side regulation (PSR) eliminates the need for an optocoupler, reducing design complexity and cost.
- Supports constant voltage (CV) and constant current (CC) regulation with high precision (±5%).
- Low no-load power consumption (<30mW), meeting stringent energy efficiency standards.
- High switching frequency (up to 130 kHz) enables compact and high-power-density designs.
- Integrated protection features such as overvoltage, undervoltage, and overcurrent protection enhance system reliability.
- Adjustable cable compensation ensures accurate output regulation across varying cable lengths.
Applications
The UCC28700DBVR is widely used in low-power AC/DC switch-mode power supplies, including:
- Mobile phone chargers and adapters.
- Low-power AC/DC adapters for consumer electronics.
- Industrial power supplies and control systems.
- LED lighting drivers.
- Metering and monitoring systems.
Its primary-side regulation and high efficiency make it an ideal choice for applications requiring compact, cost-effective, and energy-efficient power solutions.
Q & A
1. What is the primary-side regulation (PSR) feature of the UCC28700DBVR?
The PSR feature allows the device to regulate output voltage and current without requiring an optocoupler, simplifying the design and reducing costs.
2. What is the input voltage range of the UCC28700DBVR?
The input voltage range is 9V to 35V.
3. What is the maximum switching frequency of the UCC28700DBVR?
The maximum switching frequency is 140 kHz.
4. Does the UCC28700DBVR support constant current (CC) regulation?
Yes, it supports both constant voltage (CV) and constant current (CC) regulation.
5. What is the operating temperature range of the UCC28700DBVR?
The operating temperature range is -20°C to +125°C.
6. What package does the UCC28700DBVR come in?
It is available in a SOT-23-6 package.
7. What is the no-load power consumption of the UCC28700DBVR?
The no-load power consumption is less than 30mW.
8. Does the UCC28700DBVR include protection features?
Yes, it includes overvoltage, undervoltage, and overcurrent protection.
9. What is the output voltage of the UCC28700DBVR?
The output voltage is 14V.
10. What applications is the UCC28700DBVR best suited for?
It is ideal for low-power AC/DC switch-mode power supplies, such as adapters, chargers, and industrial power systems.
