UCC3919D

Programmable Features:	Auto Retry, Circuit Breaker, Current Limit, Fault Timeout, Latched Fault
Base Part Number:	UCC3919
Feature Pins:	CAP, CT, /FLT, IBIAS, IMAX, L/R, PL, /SD
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Current - Supply:	1mA
Operating Temperature:	0°C ~ 70°C
Current - Output (Max):	--
Voltage - Supply:	3 V ~ 8 V
Series:	--
Features:	UVLO
Applications:	General Purpose
Internal Switch(s):	No
Number of Channels:	1
Type:	Hot Swap Controller
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tube

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UCC3919D Application Field and Working Principle

The UCC3919D is an advanced hot swap controller designed for high power system applications. The controller is designed to provide an automated means for safe insertion or removal of a load from power sources having voltages up to 60 V. It provides override control of supply voltages to a load connected to the power source when the source is applied. It is suitable for applications involving non-standard power supplies and hot-pluggable components.The UCC3919D controller is intended to be used in a number of applications including non-standard power supplies, hot swap controllers, telecom equipment, general purpose DC/DC converters, and more. The controller also supports a wide range of power sources up to 60 V, and is capable of controlling power supply output voltages in a variety of range settings. It also provides an output voltage range of 0-4 V, and an output current limit range of 0-3 A.The primary application for the UCC3919D controller is hot swap control. Hot swap controllers protect the load by monitoring the voltage and current applied to the power supply. If the power supply exceeds its recommended levels, or is interrupted for any reason, the controller will react by reducing the voltage and current applied to the load to prevent system damage. In addition, the controller provides protection from high and low line voltages, which is essential for successful equipment operation.The working principle of the UCC3919D is based on a current mode control topology. When the applied voltage exceeds the predefined threshold, the controller will enter its current limit control loop and adjust the output current to the connected load. If the output current exceeds the factory predefined limit, the controller will reduce the voltage to keep the current at the predetermined level. The controller also monitors the supply voltage, and if the supply exceeds the maximum threshold, it will reduce the output voltage until the supply is within the acceptable range.The UCC3919D is able to recognize a sudden load change and react accordingly. This helps to minimize the risk of system damage by keeping the output current limited to the acceptable level. The controller also features a dynamic voltage regulator (DVR) that provides the required output voltage even when the input voltage changes. The UCC3919D provides a simple, cost-effective solution for safe hot swap control. With its wide range of supply voltages and protect current, it is an ideal choice for various hot swap applications. In addition, its current mode control, combined with its DVR, is capable of providing consistent output voltage even when the input voltage changes. This makes it a great alternative to other more expensive solutions.

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