UCC3839D

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Applications:	Secondary-Side Controller
Voltage - Input:	--
Voltage - Supply:	7.5 V ~ 15 V
Current - Supply:	1.3mA
Operating Temperature:	0°C ~ 70°C
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	14-SOIC
Base Part Number:	UCC3839

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Introduction

UCC3839D is a power supply controller and monitor in the PMIC - Power Supply Controllers, Monitors series. It is integrated with multiple functions, such as over/under-voltage, over-current and open/shut circuit protection, to make it a highly reliable and secure power supply control solution.

Application Field

UCC3839D is mainly used in AC/DC converters to provide over/under-voltage, over-current, open/shut circuit protection, with a maximum operating frequency of 200 kHz. Its high-speed power regulation and protection make it suitable for a variety of applications, such as home appliances, office equipment, industrial automation systems and more.

Function

UCC3839D features a two-level current source architecture and dual input voltage range (VAC 3-2.5V, DC 5-1.5V) to support various input devices. Its built-in fast response circuit ensures accurate over/under-voltage protection and over-current protection at high frequencies. It also supports open/shut circuit protection to help protect the device from accidental disconnection of its load.

Working Principle

In order to provide fast protection, UCC3839D uses a two-level current source architecture. It consists of two resistors and two NPN transistors that act as current sources. When the input voltage drops below a predetermined threshold, the two transistors that form the two-level current source will turn off and prevent current from flowing through them to the output. The two resistors provide over/under-voltage, over-current and open/shut circuit protection.

Conclusion

UCC3839D is a highly reliable power supply controller and monitor in PMIC - Power Supply Controllers, Monitors series. It provides fast response, accurate protection, and dual input voltage range, making it suitable for a variety of applications. With its high-speed power regulation and protection, UCC3839D is the perfect solution for AC/DC converters.

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