UCC3813D-0

Frequency - Switching:	46kHz
Base Part Number:	UCC3813-0
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	99%
Series:	--
Voltage - Supply (Vcc/Vdd):	6.9 V ~ 12 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Flyback, Forward Converter
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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UCC3813D-0 Application Field and Working Principle

The UCC3813D-0 is a versatile DC-DC switch-mode controller for low-power switching power supplies. It combines primary side control, two separate output channels, multiple protection features and various internal and external synchronization options to build a wide range of cost-effective power solutions.The UCC3813D-0 is ideal for powering consumer and industrial products such as networking products, gaming systems, set-top boxes, computers, automotive applications, and others.The UCC3813D-0 is designed to provide an efficient power conversion solution for systems featuring low-power switching power supplies. It provides primary-side sensing and control loop, multiple protection features and a wide range of synchronization options.

Application Field of UCC3813D-0

The UCC3813D-0 is suitable for a wide range of applications including consumer and industrial products such as networking products, gaming systems, set-top boxes, computers, automotive applications and more.The UCC3813D-0 enables designers to easily achieve low-power, high-efficiency power solutions for a wide range of products. The UCC3813D-0 allows for synchronized conversion without the need of an opto-coupler and/or secondary-side sensing.The UCC3813D-0 also includes an internal soft start time (up to 25ms max) and VREF tracking that is adjustable by an external resistor so design engineers can have greater flexibility when designing their applications.

Working Principle of UCC3813D-0

The UCC3813D-0 is a DC-DC switch-mode controller for low-power switching power supplies. It combines primary side control, two separate output channels, multiple protection features and various internal and external synchronization options to build a wide range of cost-effective power solutions.The UCC3813D-0 operates in a fixed on/off ratio, push pull (PP) PWM mode and transfers the energy from the input to the output through the power MOSFETs. When the UCC3813D-0 is in on-time (also known as \'ton\'), it produces a high voltage at the output of the power MOSFETs-known as drain voltage. When the UCC3813D-0 is in off-time (also known as \'toff\'), it produces a low voltage at the output of the power MOSFETs-known as source voltage.The UCC3813D-0 operates in a primary-side control topology. The primary side control ensures constant power and current delivery to the output. For example, if the input voltage increases, the output current and power are automatically adjusted to maintain the output power.The UCC3813D-0 has several protection features including under-voltage lockout (UVLO), over-current protection (OCP) and over-voltage protection (OVP). In addition, it includes an internal soft start time and VREF tracking that is adjustable by an external resistor for greater design flexibility.The UCC3813D-0 also includes multiple synchronization options such as synchronization signals generated by the internal oscillator, synchronization signals generated by an external oscillator, and synchronization signals generated by an external signal. This provides greater design flexibility for systems with high-frequency switching and dynamic load requirements.

Conclusion

The UCC3813D-0 is a versatile DC-DC switch-mode controller for low-power switching power supplies. It is ideal for powering consumer and industrial products such as networking products, gaming systems, set-top boxes, computers, automotive applications, and others.The UCC3813D-0 includes primary side control, two separate output channels, multiple protection features and various internal and external synchronization options to build a wide range of cost-effective power solutions. It also includes an internal soft start time and VREF tracking that is adjustable by an external resistor for greater design flexibility. The UCC3813D-0 can be used in a wide range of applications and is an ideal choice for efficient power conversion solutions for low-power switching power supplies.

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