Overview
The UCC28600DR, produced by Texas Instruments, is a quasi-resonant Flyback controller designed to meet stringent worldwide energy efficiency requirements. This PWM controller integrates advanced energy-saving features along with high-level protection mechanisms, making it a cost-effective solution for energy-efficient power supplies. The UCC28600DR operates in various modes, including quasi-resonant mode and discontinuous conduction mode (DCM), to reduce switching losses and electromagnetic interference (EMI). It is available in an 8-pin SOIC package and has an operating junction temperature range of –40°C to +105°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 0 to 32 | V |
| Operating Junction Temperature Range | –40 to 105 | °C |
| Output Sink Current (Peak) | 1.2 | A |
| Output Source Current (Peak) | –0.8 | A |
| Startup Current | 25 μA (Maximum) | A |
| Package Type | 8-pin SOIC (D) | |
| Power Dissipation (SOIC-8 package, TA = 25°C) | 650 mW | mW |
Key Features
- Green-Mode Controller with advanced energy-saving features
- Quasi-resonant mode operation for reduced EMI and low switching losses (low-voltage valley switching)
- Low standby current for minimum system no-load power consumption
- Low startup current: 25-µA maximum
- Programmable line and load over-voltage protection
- Internal overtemperature protection
- Current limit protection
- Cycle-by-cycle power limit
- Primary-side overcurrent hiccup restart mode
- 1-A sink, –0.75-A source TrueDrive™ gate drive output
- Programmable soft-start
- Green-Mode status pin (PFC disable function)
Applications
The UCC28600DR is suitable for energy-efficient power supplies up to 200 W, particularly in applications requiring low standby power consumption and high efficiency. It is ideal for use in various power supply designs where stringent energy efficiency standards need to be met, such as in consumer electronics, industrial power supplies, and other energy-conscious applications.
Q & A
- What is the primary function of the UCC28600DR?
The UCC28600DR is a quasi-resonant Flyback controller designed for energy-efficient power supplies, integrating advanced energy-saving features and high-level protection mechanisms.
- What package type is the UCC28600DR available in?
The UCC28600DR is available in an 8-pin SOIC (D) package.
- What is the operating junction temperature range of the UCC28600DR?
The operating junction temperature range is –40°C to +105°C.
- What are some of the key energy-saving features of the UCC28600DR?
Key features include quasi-resonant mode operation, low standby current, low startup current, and green-mode operation to reduce switching losses at light-load and no-load conditions.
- Does the UCC28600DR have built-in protection mechanisms?
Yes, it includes internal overtemperature protection, current limit protection, cycle-by-cycle power limit, and primary-side overcurrent hiccup restart mode.
- What is the purpose of the Green-Mode status pin?
The Green-Mode status pin provides a function to disable PFC (Power Factor Correction).
- How does the UCC28600DR reduce EMI?
The UCC28600DR reduces EMI through its quasi-resonant mode operation, which involves low-voltage valley switching.
- What is the maximum startup current of the UCC28600DR?
The maximum startup current is 25 μA.
- Is there a design calculator available for the UCC28600DR?
Yes, the UCC28600 Design Calculator (SLVC104) is available in the Tools and Software section of the UCC28600 product folder.
- What are the typical applications of the UCC28600DR?
The UCC28600DR is typically used in energy-efficient power supplies up to 200 W, especially in consumer electronics and industrial power supplies.
- How does the UCC28600DR handle overcurrent conditions?
The UCC28600DR handles overcurrent conditions through cycle-by-cycle power limit and primary-side overcurrent hiccup restart mode.
