The UCC2804D/81221G4 IC has the following pin configuration:
Advantages: - High-performance and precise power management - Wide input voltage range allows versatility in applications - Adjustable frequency and duty cycle for flexible control - Comprehensive protection features enhance system reliability
Disadvantages: - Limited output current capability (up to 500mA) - Requires external components for complete power supply system implementation - Not suitable for high-power applications
The UCC2804D/81221G4 is a current-mode PWM controller that regulates power supply systems. It operates by comparing the feedback voltage (FB) with the reference voltage (VREF) and adjusts the duty cycle of the output voltage accordingly. The error amplifier (COMP) amplifies the difference between FB and VREF, providing precise regulation.
The IC generates a sawtooth waveform using an internal oscillator and compares it with the current sense input (CS). This comparison determines the switching frequency and controls the power delivered to the load. The timing resistor/capacitor connection (RT/CT) sets the frequency range.
During startup, the soft-start function gradually increases the duty cycle, preventing excessive inrush current. The UCC2804D/81221G4 also incorporates overvoltage protection and undervoltage lockout features to safeguard the power supply system.
The UCC2804D/81221G4 is widely used in various power management applications, including:
(Note: These alternative models are provided as examples and not an exhaustive list.)
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What is the maximum operating voltage for UCC2804D/81221G4?
- The maximum operating voltage for UCC2804D/81221G4 is 30V.
What is the typical switching frequency of UCC2804D/81221G4?
- The typical switching frequency of UCC2804D/81221G4 is 100kHz.
Can UCC2804D/81221G4 be used in flyback converter applications?
- Yes, UCC2804D/81221G4 can be used in flyback converter applications.
What is the recommended input voltage range for UCC2804D/81221G4?
- The recommended input voltage range for UCC2804D/81221G4 is 10V to 28V.
Is UCC2804D/81221G4 suitable for power factor correction (PFC) applications?
- Yes, UCC2804D/81221G4 is suitable for power factor correction (PFC) applications.
What type of protection features does UCC2804D/81221G4 offer?
- UCC2804D/81221G4 offers overcurrent protection and thermal shutdown features.
Can UCC2804D/81221G4 be used in offline AC-DC converter designs?
- Yes, UCC2804D/81221G4 can be used in offline AC-DC converter designs.
What is the maximum duty cycle supported by UCC2804D/81221G4?
- The maximum duty cycle supported by UCC2804D/81221G4 is 50%.
Does UCC2804D/81221G4 have built-in soft-start functionality?
- Yes, UCC2804D/81221G4 has built-in soft-start functionality.
What is the typical operating temperature range for UCC2804D/81221G4?
- The typical operating temperature range for UCC2804D/81221G4 is -40°C to 125°C.