UC3844DG4

Frequency - Switching:	Up to 500kHz
Base Part Number:	UC3844
Supplier Device Package:	14-SOIC
Package / Case:	14-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):	48%
Series:	--
Voltage - Supply (Vcc/Vdd):	10 V ~ 30 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Buck, Buck-Boost, Flyback, Forward
Output Configuration:	Positive
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Introduction

UC3844DG4 is an integrated circuit from Texas Instruments (TI) that is part of the company’s Power Management ICs product family. It is a voltage regulators and DC/DC switching controllers that will provide an adjustable output voltage and current for use in power supplies. This power management IC is designed to offer high efficiency, low on-resistance, low power consumption and to decrease undesirable EMI emissions.

Features

The UC3844DG4 offers many features that make this power management device ideal for many applications. These features include:• Direct PWM Control• High Efficiency / Low Loss• High Signal/Noise Rejection• Multiple Current-Sense Circuits• Optional Voltage Reset Circuit• Low Parts Count• Adaptive Frequency Control• Wide Operating Voltage Range• Low Profile and Support Structure• On-Chip EMI Reduction Circuits• Low Input Sensitivity• Fault Detection and Status• Minimum Operating Voltage• Status LED Output (optional)

Applications

The UC3844DG4 is suitable for a variety of applications, including:• Automotive Audio Systems • Telecommunications Equipment• AC/DC Power Supplies • Variable Frequency Drives • Uninterruptible Power Supplies • Battery Chargers • Home Appliances• Motor Control and Robotics • Power Supplies for Personal Computers

Working Principle

The UC3844DG4 is an integrated power management device that is based on a fixed frequency voltage-mode PWM control system. The main components of this type of power management IC are an oscillator, a comparator and an error amplifier. The oscillator produces a waveform and this is compared to the input voltage by the comparator, which adjusts the output voltage. The error amplifier then compares the actual output voltage with the reference voltage to produce a control voltage which is used to adjust the pulse width of the oscillator. This adjusts the average output voltage of the power management IC. The UC3844DG4 also offers the ability to sense current, temperature and input under-voltage. This sensing can be done using an external current-sensing circuit, or the device can be set to detect currents of up to 1.3 A without an external current sense circuit. This device can also be set to detect an input voltage that is lower than the reference voltage or an under/over temperature condition.

Conclusion

UC3844DG4 from Texas Instruments is a voltage regulator and DC/DC switching controller that can provide adjustable output voltage and current for use in a variety of applications. It features direct PWM control, high efficiency, low on-resistance, low power consumption and EMI emission reduction. It is based on a fixed frequency voltage-mode PWM control system and offers the ability to sense current, temperature and input under-voltage.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description