Category: Integrated Circuit (IC)
Use: Power Management
Characteristics: - High-performance current-mode PWM controller - Designed for off-line and DC-to-DC converter applications - Provides necessary features to implement a complete power supply control system
Package: SOIC-8
Essence: The UCC2804DTR/81221 is a high-performance current-mode PWM controller used in power management applications. It offers essential features required to implement a complete power supply control system.
Packaging/Quantity: The UCC2804DTR/81221 is available in a small outline integrated circuit (SOIC) package with 8 pins. It is typically sold in reels or tubes containing multiple units.
The UCC2804DTR/81221 has the following pin configuration:
```
| | --| VREF VCC|-- --| COMP GND|-- --| FB OUT|-- --| CS RT/CT|-- |___________| ```
Advantages: - High-performance controller for power management applications - Flexible frequency and duty cycle adjustment - Comprehensive protection features - Compact SOIC package for space-constrained designs
Disadvantages: - Limited output current capability (±1A) - Requires external components for complete power supply implementation
The UCC2804DTR/81221 operates as a current-mode PWM controller. It compares the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is amplified by the internal error amplifier (COMP) and used to control the duty cycle of the output waveform.
By adjusting the timing resistor (RT) and timing capacitor (CT), the switching frequency and duty cycle can be set according to the desired application requirements. The soft-start feature ensures a gradual increase in output voltage during startup, preventing excessive inrush current.
The UCC2804DTR/81221 also incorporates various protection features such as overcurrent protection and undervoltage lockout to safeguard the power supply system.
The UCC2804DTR/81221 is widely used in various power management applications, including:
Its flexibility in frequency and duty cycle adjustment makes it suitable for different power supply topologies and load requirements.
These alternative models offer similar functionality and can be used as replacements for the UCC2804DTR/81221 in various applications.
In conclusion, the UCC2804DTR/81221 is a high-performance current-mode PWM controller designed for power management applications. Its adjustable frequency and duty cycle, along with comprehensive protection features, make it a versatile choice for various power supply designs.
What is the maximum operating voltage for UCC2804DTR/81221?
- The maximum operating voltage for UCC2804DTR/81221 is 30V.
What is the typical frequency range for the oscillator in UCC2804DTR/81221?
- The typical frequency range for the oscillator in UCC2804DTR/81221 is 50kHz to 500kHz.
Can UCC2804DTR/81221 be used in flyback converter applications?
- Yes, UCC2804DTR/81221 can be used in flyback converter applications.
What is the maximum duty cycle supported by UCC2804DTR/81221?
- The maximum duty cycle supported by UCC2804DTR/81221 is 100%.
Is UCC2804DTR/81221 suitable for power factor correction (PFC) applications?
- Yes, UCC2804DTR/81221 is suitable for power factor correction (PFC) applications.
What is the recommended operating temperature range for UCC2804DTR/81221?
- The recommended operating temperature range for UCC2804DTR/81221 is -40°C to 125°C.
Can UCC2804DTR/81221 be used in offline AC-DC converter designs?
- Yes, UCC2804DTR/81221 can be used in offline AC-DC converter designs.
What type of protection features does UCC2804DTR/81221 offer?
- UCC2804DTR/81221 offers overcurrent protection and thermal shutdown protection.
Is UCC2804DTR/81221 compatible with digital control interfaces?
- No, UCC2804DTR/81221 is an analog controller and is not compatible with digital control interfaces.
What are the typical application circuits for UCC2804DTR/81221?
- Typical application circuits for UCC2804DTR/81221 include LED drivers, battery chargers, and DC-DC converters.