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UCC2802PW
Basic Information Overview
- Category: Integrated Circuit (IC)
- Use: Power Management
- Characteristics: PWM Controller
- Package: TSSOP-16
- Essence: Voltage Mode PWM Controller
- Packaging/Quantity: Tape and Reel, 2500 units per reel
Specifications
- Input Voltage Range: 7V to 25V
- Output Voltage Range: 0V to 5.1V
- Operating Temperature Range: -40°C to 85°C
- Frequency Range: 50kHz to 1MHz
- Duty Cycle Range: 0% to 100%
- Maximum Duty Cycle: 90%
Detailed Pin Configuration
- VREF: Reference Voltage Input
- COMP: Error Amplifier Output
- FB: Feedback Voltage Input
- CS: Current Sense Input
- RT/CT: Oscillator Timing Components
- GND: Ground
- VDD: Supply Voltage Input
- OUT: PWM Output
- SYNC: Synchronization Input
- SS/TR: Soft-Start/Tracking Control
- UVLO: Under-Voltage Lockout
- EN/UV: Enable/Undervoltage Lockout
- NC: No Connection
- NC: No Connection
- NC: No Connection
- NC: No Connection
Functional Features
- Voltage mode control with adjustable duty cycle
- Internal error amplifier for precise regulation
- Adjustable soft-start and tracking control
- Synchronization capability for multi-phase operation
- Under-voltage lockout protection
- Over-current protection
- Thermal shutdown protection
Advantages
- Wide input voltage range allows for versatile applications
- High efficiency due to precise voltage regulation
- Flexible frequency and duty cycle adjustment
- Protection features enhance system reliability
- Compact TSSOP-16 package saves board space
Disadvantages
- Limited maximum duty cycle of 90%
- Requires external components for operation
- Not suitable for high-frequency applications
Working Principles
The UCC2802PW is a voltage mode PWM controller used in power management applications. It operates by comparing the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is amplified and used to control the duty cycle of the PWM output (OUT). By adjusting the duty cycle, the UCC2802PW regulates the output voltage.
The device also features soft-start and tracking control, which allow for gradual startup and synchronization with other converters in multi-phase systems. Under-voltage lockout (UVLO), over-current protection, and thermal shutdown mechanisms ensure safe operation and protect the system from faults.
Detailed Application Field Plans
The UCC2802PW is commonly used in various power management applications, including: 1. Switching Power Supplies 2. DC-DC Converters 3. LED Lighting Systems 4. Battery Chargers 5. Motor Control Circuits
Detailed and Complete Alternative Models
- UCC2803PW: Similar specifications, but with additional features like adjustable dead time and leading-edge blanking.
- UCC2804PW: Higher maximum duty cycle of 95% and wider input voltage range.
- UCC2805PW: Lower operating temperature range (-40°C to 70°C) and lower cost.
Note: These alternative models are suggested based on similar functionality and characteristics, but it is recommended to refer to the manufacturer's datasheets for detailed specifications and suitability for specific applications.
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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng UCC2802PW trong giải pháp kỹ thuật
Sure! Here are 10 common questions and answers related to the application of UCC2802PW in technical solutions:
Q: What is UCC2802PW? A: UCC2802PW is a pulse width modulation (PWM) controller IC commonly used in power supply applications.
Q: What is the operating voltage range of UCC2802PW? A: The operating voltage range of UCC2802PW is typically between 8V and 35V.
Q: What is the purpose of using UCC2802PW in power supply designs? A: UCC2802PW is used to regulate and control the output voltage and current of power supplies, ensuring stable and efficient operation.
Q: Can UCC2802PW be used in both AC-DC and DC-DC power supply designs? A: Yes, UCC2802PW can be used in both AC-DC and DC-DC power supply designs, making it versatile for various applications.
Q: What is the maximum switching frequency supported by UCC2802PW? A: The maximum switching frequency supported by UCC2802PW is typically around 500kHz.
Q: How does UCC2802PW provide feedback control in power supply designs? A: UCC2802PW uses a feedback loop to monitor the output voltage and adjust the duty cycle of the PWM signal to maintain the desired output.
Q: Can UCC2802PW handle high current loads? A: UCC2802PW itself is a controller IC and cannot handle high current loads directly. It requires external power devices such as MOSFETs or transistors to handle the load.
Q: Is UCC2802PW suitable for low-power applications? A: Yes, UCC2802PW can be used in low-power applications as it offers adjustable current limit and standby power-saving features.
Q: What are the typical protection features provided by UCC2802PW? A: UCC2802PW typically includes protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.
Q: Are there any application notes or reference designs available for using UCC2802PW? A: Yes, Texas Instruments provides application notes and reference designs that offer guidance on using UCC2802PW in various power supply applications. These resources can be found on their website.
Please note that the answers provided here are general and may vary depending on specific design requirements and manufacturer specifications.