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UCC3817N - English Editing Encyclopedia Entry
Product Overview
Category
UCC3817N belongs to the category of integrated circuits (ICs).
Use
This IC is commonly used in power management applications.
Characteristics
- UCC3817N is a voltage mode PWM controller.
- It operates with a wide input voltage range.
- The IC offers high efficiency and excellent line and load regulation.
- It provides protection features such as overvoltage and overcurrent protection.
Package
UCC3817N is available in a standard 16-pin dual-in-line package (DIP).
Essence
The essence of UCC3817N lies in its ability to regulate and control power in various applications efficiently.
Packaging/Quantity
UCC3817N is typically packaged in reels or tubes, with quantities varying based on customer requirements.
Specifications
- Input Voltage Range: 4.5V to 40V
- Output Voltage Range: 0.8V to 37V
- Maximum Output Current: 1A
- Switching Frequency: 100kHz to 500kHz
- Operating Temperature Range: -40°C to 85°C
Detailed Pin Configuration
- VREF: Reference voltage input
- COMP: Error amplifier output
- FB: Feedback pin for regulating the output voltage
- CS: Current sense input
- GND: Ground reference
- RT/CT: Timing components connection
- SYNC: Synchronization input
- SS/TR: Soft-start and tracking control
- VCC: Power supply input
- OUT: Output pin
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
Functional Features
- Voltage mode control for precise regulation
- Adjustable soft-start and tracking control
- Overvoltage protection (OVP)
- Overcurrent protection (OCP)
- Error amplifier with high gain and bandwidth
- Synchronization capability for multi-phase operation
Advantages and Disadvantages
Advantages
- Wide input voltage range allows for versatile applications.
- High efficiency ensures optimal power management.
- Excellent line and load regulation provide stable output.
- Protection features safeguard against voltage and current anomalies.
Disadvantages
- Limited maximum output current may restrict certain high-power applications.
- Requires external timing components for frequency adjustment.
Working Principles
UCC3817N operates on the principle of voltage mode control. 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 adjust the duty cycle of the PWM signal. By modulating the duty cycle, the IC regulates the output voltage according to the desired setpoint. The soft-start and tracking control feature ensures a smooth startup and synchronization capability enables multi-phase operation.
Detailed Application Field Plans
UCC3817N finds extensive application in various power management systems, including but not limited to: - DC-DC converters - Switching power supplies - Battery chargers - LED drivers - Industrial automation equipment
Detailed and Complete Alternative Models
- UCC3813N: Similar functionality with reduced pin count (8-pin DIP).
- UCC3815N: Enhanced features such as adjustable slope compensation.
- UCC3818N: Higher maximum output current capability (2A).
These alternative models offer similar performance characteristics and can be considered based on specific application requirements.
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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de UCC3817N en soluciones técnicas
Sure! Here are 10 common questions and answers related to the application of UCC3817N in technical solutions:
Q: What is UCC3817N? A: UCC3817N is a voltage mode PWM controller IC used for regulating power supplies.
Q: What is the input voltage range of UCC3817N? A: The input voltage range of UCC3817N is typically between 8V and 18V.
Q: What is the output voltage range of UCC3817N? A: The output voltage range of UCC3817N depends on the external components used, but it can be adjusted from 0V to the input voltage.
Q: How does UCC3817N regulate the output voltage? A: UCC3817N uses pulse width modulation (PWM) technique to regulate the output voltage by adjusting the duty cycle of the switching signal.
Q: Can UCC3817N handle high current loads? A: No, UCC3817N is primarily designed for low to medium current applications. For high current loads, additional external components may be required.
Q: What is the maximum switching frequency of UCC3817N? A: The maximum switching frequency of UCC3817N is typically around 500kHz.
Q: Does UCC3817N have built-in protection features? A: Yes, UCC3817N has various built-in protection features like overvoltage protection, undervoltage lockout, and thermal shutdown.
Q: Can UCC3817N operate in a wide temperature range? A: Yes, UCC3817N is designed to operate in a wide temperature range, typically from -40°C to 85°C.
Q: What type of power supply topologies can UCC3817N be used in? A: UCC3817N can be used in various power supply topologies like flyback, forward, and push-pull converters.
Q: Are there any application notes or reference designs available for UCC3817N? A: Yes, Texas Instruments provides application notes and reference designs that can help in implementing UCC3817N in different technical solutions.
Please note that the answers provided here are general and may vary depending on specific design considerations and requirements. It is always recommended to refer to the datasheet and application notes provided by the manufacturer for accurate information.