UCC2580DTR-1

Frequency - Switching:	400kHz
Base Part Number:	UCC2580-1
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable, Ramp, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	66%
Series:	--
Voltage - Supply (Vcc/Vdd):	8.5 V ~ 16 V
Output Phases:	1
Number of Outputs:	2
Topology:	Forward Converter
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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The UCC2580DTR-1 is a dc-dc buck synchronous PWM mode controller developed by Texas Instruments that is specifically designed for use in low voltage/low current applications such as automotive body electronics, low-end video projection, and home appliance applications. This device features advanced start-up sequencing, multiple operating modes, and adjustable voltage slope compensation, allowing designers to optimize the performance characteristics of their designs. The UCC2580DTR-1 also integrates a variety of protection features to protect the device and the system from overload and over-temperature conditions.In order to understand the operation of the UCC2580DTR-1, it is important to understand the basics of dc-dc buck synchronous PWM mode control. The buck topology is generally used for step-down voltage conversion applications. The basic circuit schematic for a dc-dc buck synchronous PWM controller is shown in figure 1.The UCC2580DTR-1 is a single-ended synchronous PWM controller that regulates an output voltage based on a single input voltage. When a load is applied to the output terminal Vout, the voltage at the output should be maintained at a particular level by adjusting the duty cycle of the PWM signal applied to the switch. The duty cycle of the PWM signal is determined by the voltage detected at the non-inverting input of the PWM comparator.The UCC2580DTR-1 has four operating modes: Power Good Output, Power Supply Discharge, Load Discharge and On/Off. In Power Good Output mode, the UCC2580DTR-1 will perform normal on/off control and will enable a high voltage output if the detected voltage reaches the limit set by the external resistors. If the detected voltage falls below the limit, the UCC2580DTR-1 will turn off the output.In Power Supply Discharge mode, the UCC2580DTR-1 will monitor the input supply voltage and will discharge the output if the supply voltage drops below a certain level. This ensures that the voltage at the output remains constant and that the load is protected from overvoltage conditions.In Load Discharge mode, the UCC2580DTR-1 will monitor the output voltage and will discharge the output voltage if it exceeds a certain limit. This mode is useful for applications where the load must be protected from overvoltage conditions.Finally, the On/Off mode controls the output voltage of the UCC2580DTR-1 directly. In this mode, the output voltage is adjustable from 0V to 15V, and the output voltage is determined by the voltage on the Enable pin.Aside from these operating modes, the UCC2580DTR-1 also features a variety of integrated protection features. Over-temperature protection will automatically turn off the output power if the temperature of the device exceeds a certain limit. Over-current protection will turn off the output power if the output current exceeds a certain limit. Over-voltage and Under-voltage protection will turn off the output power if the detected voltage exceeds a certain limit.All in all, the UCC2580DTR-1 is an ideal solution for low voltage, low current applications. Its advanced start-up sequencing, multiple operating modes, adjustable voltage slope compensation and variety of protection features make it an ideal choice for automotive, projectors and appliance applications. As a result, the UCC2580DTR-1 offers designers a more reliable, cost-effective and power efficient solution for their applications.

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