UCC2813QDR-4Q1 Integrated Circuits (ICs)

Duty Cycle:	49%
Base Part Number:	UCC2813
Mounting Type:	Surface Mount
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 125°C (TA)
Control Features:	Frequency Control
Fault Protection:	--
Frequency - Switching:	1MHz
Series:	Automotive, AEC-Q100
Voltage - Supply (Vcc/Vdd):	8.3 V ~ 12 V
Voltage - Start Up:	12.5V
Topology:	Boost, Flyback, Forward
Voltage - Breakdown:	--
Internal Switch(s):	Yes
Output Isolation:	Non-Isolated
Part Status:	Active
Packaging:	Tape & Reel (TR)

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UCC2813QDR-4Q1 Application Field and Working Principle

Introduction

UCC2813QDR-4Q1 is a highly integrated pulse-width modulated (PWM) controller with leading edge current mode control utilizing a single inductor topology, providing a highly efficient and cost-effective solution for offline power supplies targeting both industrial and consumer applications. This device operates from a wide voltage range of 9V to 550V and includes internal sensing of multiple output voltages. The on-chip frequency setting circuitry is used for high frequency operation up to 1MHz and provides simple control of the device. This allows easy implementation of the same design in both open-loop and closed-loop mode. In addition, the device integrates a soft start function, which eliminates start-up overshoot and helps to minimize audible noise.

Application Field

UCC2813QDR-4Q1 is widely used in buck, boost, flyback, multiple output, and LLC converters operating in both continuous conduction mode and discontinuous conduction mode. It provides power range up to 400W in buck converter and 250W in boost converter with wide load range from 300mA to 10A. The device is well suited for applications requiring high efficiency, low audible noise, fast transient response, and comprehensive system protection. It is also suitable for a variety of offline energy-saving applications such as Home Appliances, Battery Chargers, Automotive, Lighting and Power Adapters. In addition, its high switching frequency of up to 1MHz and the strong current drive capability of gate driver output make the UCC2813QDR-4Q1 an ideal solution for high power density designs.

Working Principle

The UCC2813QDR-4Q1 is a current mode pulse-width modulated (PWM) controller designed with a single inductor topology. The current mode control provides excellent line and load transient response and also reduces output noise and audio noise. The device implements leading edge modulation, delayed valley control and valley blanking for improved efficiency and reduced EMI. The UCC2813QDR-4Q1 uses an on-chip voltage divider to sense multiple output voltages and rail to rail voltage sensing. It also features a soft start circuit to reduce current surge and startup overshoot.The UCC2813QDR-4Q1 utilizes input voltage leading edge blanking (LEB) and valley blanking to reduce EMI during the transition of the input voltage. This LEB technique keeps the switching frequency constant even when the input voltage varies. Furthermore, the UCC2813QDR-4Q1 has adjustable output current limit, adjustable switching frequency and built-in line undervoltage/overvoltage protection.

Conclusion

In conclusion, the UCC2813QDR-4Q1 is a highly integrated pulse-width modulated (PWM) controller with leading edge current mode control utilizing a single inductor topology. This device operates from a wide voltage range of 9V to 550V and includes internal sensing of multiple output voltages. It is capable of operating in buck, boost, flyback, multiple output, and LLC converters for applications requiring high efficiency, low audible noise, fast transient response and comprehensive system protection. This device also features adjustable output current limit, adjustable switching frequency, LEB and valley blanking, and built-in line undervoltage/overvoltage protection, making it an ideal solution for energy-saving applications for Home Appliances, Battery Chargers, Automotive, Lighting and Power Adapters.

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