Part Number: UCC2813QDR-5Q1

Manufacturer: Texas Instruments


Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of UCC2813QDR-5Q1

Datasheet  UCC2813QDR-5Q1 datasheet
Category Integrated Circuits (ICs)
Family PMIC – Voltage Regulators – DC DC Switching Controllers
Manufacturer Texas Instruments
Series Automotive, AEC-Q100
Packaging Tape & Reel (TR)
Part Status Active
Output Type Transistor Driver
Function Step-Up, Step-Up/Step-Down
Output Configuration Positive
Topology Boost, Flyback, Forward Converter
Number of Outputs 1
Output Phases 1
Voltage – Supply (Vcc/Vdd) 3.6 V ~ 12 V
Frequency – Switching
Duty Cycle (Max) 49%
Synchronous Rectifier No
Clock Sync No
Serial Interfaces
Control Features Frequency Control
Operating Temperature -40°C ~ 125°C (TJ)
Package / Case 8-SOIC (0.154″, 3.90mm Width)
Supplier Device Package 8-SOIC


The UCC2813QDR-5Q1 is an extremely versatile DC-DC controller IC that has been specifically designed to meet the demands of Boost, Flyback, and Forward Converter regulators. This IC provides a comprehensive solution for a wide range of power supply applications thanks to its ability to support positive output step-up and step-up/step-down operations.

The UCC2813QDR-5Q1 is available in an 8-SOIC package, which makes it compact and ideal for designs with limited space. With its robust features, efficient performance, and wide input and output voltage range, this device is an ideal choice for a variety of power conversion needs.

This guide will provide a comprehensive overview of the UCC2813QDR-5Q1 IC. We will examine its internal architecture, operation principles, design considerations, and application examples. Whether you are a beginner or an experienced engineer, this guide will give you a thorough understanding of this powerful DC-DC controller IC and help you effectively utilize its capabilities. Let’s delve into the fascinating world of UCC2813QDR-5Q1!

Overview of UCC2813QDR-5Q1

  • The UCC2813QDR-5Q1 is a highly versatile DC-DC controller IC designed to cater to the diverse requirements of different power supply applications. It boasts an extensive array of features and specifications. Let us examine its key aspects more closely.
  • The UCC2813QDR-5Q1 has a wide input voltage range of 4.5 volts to 28 volts.The flexibility of this system enables it to be compatible with a diverse array of input sources.
  • The IC offers a wide range of output voltages, making it ideal for various positive output step-up and step-up/step-down operations. The range of the output voltage will vary depending on the external components used and the specific design configuration.
  • The UCC2813QDR-5Q1 has a fixed switching frequency that can be adjusted using external components. The typical range for switching frequency is typically a few hundred kilohertz to a few megahertz, which allows for flexibility when designing power supplies that are efficient.

Internal Architecture

The UCC2813QDR-5Q1 is equipped with a strong internal architecture that consists of different functional blocks. These blocks collaborate to effectively regulate the DC-DC conversion process. These are the key components:

  • The error amplifier is responsible for comparing the feedback voltage, which represents the desired output voltage, with the reference voltage. It then generates an error signal based on this comparison. The error signal is utilized to modify the duty cycle of the PWM (Pulse Width Modulation) signal.
  • The oscillator is responsible for generating a stable clock signal that is used to time the switching operation. The power switch’s frequency is determined by how often it turns on and off.
  • The PWM comparator is responsible for comparing the error signal from the error amplifier with the ramp signal generated by the oscillator. Based on this comparison, the system generates the PWM signal to control the duty cycle of the power switch.

The driver circuitry serves to amplify the PWM signal and subsequently drive the power switch. It ensures efficient power switch operation and minimizes losses associated with switching.

UCC2813QDR-5Q1 Key Protection Features

The UCC2813QDR-5Q1 has important safety features built in to protect the IC and the whole power source system. Some of these things are:

  • Overcurrent Protection (OCP): The IC keeps an eye on the current going through the power switch. If the current goes over a certain level, OCP is set off. OCP helps keep the IC and other parts from getting damaged when things aren’t working right.
  • Overvoltage Protection (OVP): The OVP feature keeps the power source safe by watching the output voltage. If the output voltage goes above a certain point, OVP turns on to protect the load from too much voltage.
  • Thermal Shutdown: The thermal shutdown feature turns on when the temperature goes above a safe working limit. This keeps the IC from overheating and getting damaged. It briefly turns off the IC until the temperature goes back down to a safe level.
  • These safety features help make UCC2813QDR-5Q1-based power supply systems more reliable and safe by making sure they run smoothly and protect against faults.

Boost Converter Operation

The Boost converter is a common type of DC-DC converter design that regulates the output voltage by stepping it up. It is often used when the input voltage is lower than what is needed for the output voltage. When used with the UCC2813QDR-5Q1 IC, the Boost converter is an effective way to handle such situations. Let’s look at how the UCC2813QDR-5Q1 IC works in the Boost converter:


● Power Switch On

When the circuit is first turned on, the power switch (MOSFET) is on. This lets current pass from the input voltage source (Vin) through the inductor (L) and the power switch to ground (GND). The energy is stored in the magnetic field of the inductor.

When the power switch is turned on, the current in the inductor goes up, and energy is saved in the magnetic field of the inductor. The source (Vout) gets power from the output capacitor (C).

Turn off the power and let the energy out. The UCC2813QDR-5Q1 IC measures the feedback voltage and compares it to the reference voltage. When the current in the inductor hits a certain level that has already been set, the IC turns off the power switch. The energy that was stored in the inductor is now released.

When the power switch is off, the diode (D) conducts, allowing the current from the inductor to flow through the diode and the output capacitor to reach the load. This keeps the current from stopping and lets energy move from the inductor to the output.

● Inductor Energy Transfer

As the inductor discharges, the energy stored in its magnetic field is passed to the output capacitor and the load. This raises the output voltage.

● Cycle Repeats

The process happens over and over again in a loop. Based on the feedback voltage, the UCC2813QDR-5Q1 IC controls the flipping of the power switch by changing the duty cycle of the PWM signal. This controls the output voltage.


The UCC2813QDR-5Q1 IC is a versatile and flexible DC-DC driver suitable for Boost, Flyback, and Forward converters. It provides the ability to step up and step down the output voltage. With its compact 8-SOIC package, wide input and output voltage range, and robust protection features, it is an excellent choice for efficient and reliable power supply solutions.

By utilizing its internal components, such as the error amplifier, oscillator, PWM comparator, and driver circuits, engineers have precise control over DC-DC conversion. In a Boost converter configuration, the IC works seamlessly with the power switch, inductor, diode, and output capacitor. By exploring the full potential of the UCC2813QDR-5Q1 IC, engineers can create flexible and adaptable power systems. To learn more about this product or to place an order, contact us at ICRFQ, the leading electronic component distributor in China. We are dedicated to providing high-quality products at affordable prices.

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