UCC3581DG4

Frequency - Switching:	Up to 100kHz
Base Part Number:	UCC3581
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Current Limit, Enable, Frequency Control, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	No
Duty Cycle (Max):	84%
Series:	--
Voltage - Supply (Vcc/Vdd):	6.8 V ~ 15 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck, Boost, Flyback, Forward Converter
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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UCC3581DG4 is a general-purpose synchronous return pulse width modulator (SRPWM) controller manufactured by Texas Instruments. It is designed for use in both DC-DC converter and motor control applications. The device features a wide operating input voltage range of 4.5V to 36V, and can generate a PWM output from 0V to the input voltage. It also supports both PWM and Linear mode operations. The UCC3581DG4 has several features that make it an ideal choice for various applications. These features include low quiescent current, low on-resistance outputs, integrated bootstrapping, and adjustable dead-time control.In a DC-DC converter application, the UCC3581DG4 is used to control the switching of power transistors, allowing the regulated output power to be delivered to a load. The device acts as a controller, while the high and low side FETs act as a power switch. The UCC3581DG4 is designed to take a voltage set point as a reference and drive the output voltage by controlling the duty cycle of the output power. The feedback signal is compared to the reference signal, and the error is then used to adjust the PWM output signal to ensure a stable output voltage.For motor control applications, the UCC3581DG4 is used to control the speed, torque and overload of a motor. It takes the voltage from an external source and adjusts it based on the motor\'s load and speed demand. The device uses current sensing and direct drive PWM outputs to accurately regulate the motor\'s speed and torque.The UCC3581DG4 also has a bootstrapping feature that allows it to drive a larger N-Channel MOSFET with a higher voltage than its own supply. This allows the device to use a lower input voltage, reducing power loss and decreasing power dissipation.The UCC3581DG4 also has adjustable dead-time control which helps reduce noise and unwanted output ripple. Dead-time control ensures that the high-side and low side FETs do not turn on at the same time which can cause EMI issues. Dead-time control also helps reduce power dissipation and minimize the power losses.Overall, the UCC3581DG4 is a versatile device that is well-suited for DC-DC converter and motor control applications. It offers low quiescent current, low on-resistance outputs, integrated bootstrapping, and adjustable dead-time control, making it an ideal choice for many different types of applications.

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