Overview
The UCC28742DBVR is a highly integrated, 6-pin secondary-side regulated PWM controller manufactured by Texas Instruments. Designed for efficient AC/DC power supplies, this controller is particularly suited for applications requiring isolated flyback topologies. Its market positioning targets power supply designers seeking high efficiency, compact designs, and robust performance in consumer electronics, industrial automation, and other power-intensive applications. The UCC28742DBVR stands out for its secondary-side regulation, precise current limiting, and advanced fault protection features, making it a competitive choice in the power management IC market.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Switching Frequency (Max) | 105 | kHz | |
| UVLO Thresholds (On/Off) | 22/7.7 | V | |
| Duty Cycle (Max) | 99 | % | |
| Operating Temperature Range | -40 to 125 | °C | |
| Output Regulation Accuracy | 1 | % | |
| Package | SOT23-6 |
Key Features
- Secondary-side regulation for precise output control.
- Resonant valley switching for improved efficiency.
- Frequency dithering to simplify EMI compliance.
- Clamped gate drive output for MOSFET protection.
- Comprehensive fault protection including OVP, OCP, and UVLO.
Applications
The UCC28742DBVR is widely used in AC/DC power supplies for consumer electronics, industrial equipment, and LED lighting. Its ability to handle large load steps with transient response makes it ideal for applications requiring stable and efficient power delivery. Additionally, its isolated flyback topology is suitable for designs where safety and reliability are critical, such as in medical devices and automotive electronics.
Q & A
What is the maximum switching frequency of the UCC28742DBVR?
The maximum switching frequency is 105 kHz.
What is the operating temperature range?
The operating temperature range is -40°C to 125°C.
Does it support secondary-side regulation?
Yes, it features secondary-side regulation for precise output control.
What type of protection features are included?
It includes overvoltage protection (OVP), overcurrent protection (OCP), and undervoltage lockout (UVLO).
What is the package type?
The package type is SOT23-6.
What is the duty cycle range?
The maximum duty cycle is 99%.
Is it suitable for isolated flyback topologies?
Yes, it is specifically designed for isolated flyback topologies.
What is the UVLO threshold?
The UVLO thresholds are 22V (on) and 7.7V (off).
Does it support frequency dithering?
Yes, frequency dithering is supported to simplify EMI compliance.
What is the output regulation accuracy?
The output regulation accuracy is 1%.
