UCC3803N
Low-power BiCMOS current-mode PWM controllers for power management
Manufacturer： ['rochester', 'analog-devices', 'ti']
series introduction
# UCC3803N Product Series Introduction
## 1. Overview
The UCC3803N is a highly versatile and reliable integrated circuit product series that plays a crucial role in power management and control applications. Developed by Texas Instruments, this series is designed to meet the demanding requirements of various power supply systems, offering a combination of high - performance features, ease of use, and cost - effectiveness.
## 2. Key Features
### 2.1 Wide Input Voltage Range
The UCC3803N can operate over a wide input voltage range. This flexibility allows it to be used in a variety of power supply designs, from low - voltage battery - powered systems to high - voltage industrial power supplies. For example, it can handle input voltages from a few volts up to several tens of volts, making it suitable for different power sources such as DC power supplies, batteries, and solar panels.
### 2.2 High - Frequency Operation
It supports high - frequency switching, which is essential for reducing the size of passive components such as inductors and capacitors in power supply circuits. High - frequency operation enables the design of more compact and lightweight power supplies, which is particularly important in applications where space is limited, such as portable electronic devices and aerospace systems.
### 2.3 Precise Voltage Regulation
The UCC3803N provides precise output voltage regulation. It uses advanced control algorithms and feedback mechanisms to maintain a stable output voltage even under varying load conditions and input voltage fluctuations. This ensures that the connected electronic devices receive a consistent and reliable power supply, protecting them from damage caused by over - voltage or under - voltage situations.
### 2.4 Current Limiting and Protection
To safeguard the power supply and the connected load, the UCC3803N is equipped with current - limiting and protection features. It can detect excessive current flow and automatically adjust the output to prevent over - current conditions. Additionally, it may have built - in protection against short - circuits, over - temperature, and under - voltage lockout, enhancing the overall reliability and safety of the power supply system.
### 2.5 Adjustable Output
The output voltage of the UCC3803N can be easily adjusted according to the specific requirements of the application. This is typically achieved through external resistors or other control elements. The ability to adjust the output voltage makes the product suitable for a wide range of applications with different voltage requirements, such as powering different types of integrated circuits, microcontrollers, and sensors.
## 3. Functional Block Diagram and Working Principle
### 3.1 Functional Block Diagram
The UCC3803N consists of several key functional blocks, including an error amplifier, a pulse - width modulator (PWM), a reference voltage source, and output drivers. The error amplifier compares the actual output voltage with a reference voltage and generates an error signal. This error signal is then fed into the PWM, which adjusts the width of the output pulses based on the error magnitude. The output drivers are responsible for driving the power switches (such as MOSFETs) in the power supply circuit, controlling the flow of power from the input to the output.
### 3.2 Working Principle
When the power supply is turned on, the reference voltage source provides a stable reference voltage. The error amplifier continuously monitors the output voltage and compares it with the reference voltage. If the output voltage deviates from the desired value, the error amplifier generates an error signal. The PWM modulates the width of the output pulses in response to this error signal. A wider pulse width allows more power to be transferred from the input to the output, increasing the output voltage, while a narrower pulse width reduces the power transfer and lowers the output voltage. This feedback control loop ensures that the output voltage remains stable.
## 4. Applications
### 4.
Images for reference
8-DIP
Image Preview
Image Preview