規格
| 屬性 | 價值 |
| Package | Tape & Reel (TR) |
| ProductStatus | Active |
| OutputType | Transistor Driver |
| Function | Step-Up/Step-Down |
| OutputConfiguration | Positive |
| Topology | Push-Pull |
| NumberofOutputs | 2 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 4.1V ~ 15V |
| Frequency-Switching | 194kHz |
| DutyCycle(Max) | 49% |
| SynchronousRectifier | No |
| ClockSync | No |
| ControlFeatures | Frequency Control |
| OperatingTemperature | 0°C ~ 70°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
概述
Description
The UCC3808DTR-2 is a high-performance, low-power, current-mode PWM controller designed for DC-DC converter applications. It is part of Texas Instruments' UCC3808 family and is used primarily in power supply designs requiring efficiency and precise control.
Key features of the UCC3808DTR-2 include a wide input voltage range, low start-up and operating currents, and an on-chip error amplifier. It operates with a fixed frequency set by an external resistor and capacitor, which provides design flexibility. The chip also features built-in protection mechanisms such as undervoltage lockout and pulse-by-pulse current limiting, enhancing the safety and reliability of power supply designs.
The device is housed in an 8-pin SOIC package, which is suitable for space-constrained applications. It supports applications in telecommunications, consumer electronics, and industrial equipment. The UCC3808DTR-2 is often chosen for its ability to deliver efficient power conversion while minimizing external component count and complexity.
Key features of the UCC3808DTR-2 include a wide input voltage range, low start-up and operating currents, and an on-chip error amplifier. It operates with a fixed frequency set by an external resistor and capacitor, which provides design flexibility. The chip also features built-in protection mechanisms such as undervoltage lockout and pulse-by-pulse current limiting, enhancing the safety and reliability of power supply designs.
The device is housed in an 8-pin SOIC package, which is suitable for space-constrained applications. It supports applications in telecommunications, consumer electronics, and industrial equipment. The UCC3808DTR-2 is often chosen for its ability to deliver efficient power conversion while minimizing external component count and complexity.
Equivalent
The UCC3808DTR-2 is a PWM controller used for DC/DC converters. Equivalent or similar products include the TL3843D, UC3842, and NCP1200 family of PWM controllers. When selecting an equivalent, ensure compatibility with the specific voltage, current, and switching frequency requirements of your application. Always check the datasheet for pin configuration and feature compatibility.
Features
The UCC3808DTR-2 is a pulse width modulation (PWM) controller designed for DC-DC converters and off-line power supplies. Key features include:
1. High-Frequency Operation: It supports a maximum frequency of up to 1 MHz, enabling smaller and more efficient power supply designs.
2. Low Start-Up Current: With a start-up current of 50 µA, it is suitable for energy-efficient applications.
3. Precision Reference: Offers a precise 5 V reference voltage with ±1% accuracy for stable operation.
4. Soft-Start Capability: Integrates an internal soft-start function to limit inrush current and protect the system during start-up.
5. Under-Voltage Lockout (UVLO): Provides a UVLO feature to ensure reliable operation by preventing the controller from turning on until the input voltage reaches a specified level.
6. Shutdown Capability: Allows for easy shutdown to save power in low-demand scenarios.
7. Output Drive: Features a totem-pole output stage capable of sourcing or sinking 1 A, suitable for driving power MOSFETs.
8. Wide Temperature Range: Operates over an industrial temperature range, enhancing its applicability in various environments.
These features make the UCC3808DTR-2 versatile and efficient for power supply applications.
1. High-Frequency Operation: It supports a maximum frequency of up to 1 MHz, enabling smaller and more efficient power supply designs.
2. Low Start-Up Current: With a start-up current of 50 µA, it is suitable for energy-efficient applications.
3. Precision Reference: Offers a precise 5 V reference voltage with ±1% accuracy for stable operation.
4. Soft-Start Capability: Integrates an internal soft-start function to limit inrush current and protect the system during start-up.
5. Under-Voltage Lockout (UVLO): Provides a UVLO feature to ensure reliable operation by preventing the controller from turning on until the input voltage reaches a specified level.
6. Shutdown Capability: Allows for easy shutdown to save power in low-demand scenarios.
7. Output Drive: Features a totem-pole output stage capable of sourcing or sinking 1 A, suitable for driving power MOSFETs.
8. Wide Temperature Range: Operates over an industrial temperature range, enhancing its applicability in various environments.
These features make the UCC3808DTR-2 versatile and efficient for power supply applications.
Pinout
The UCC3808DTR-2 is an integrated circuit from Texas Instruments. It is a high-speed, low-power PWM controller ideal for DC-DC converters and offers a variety of features suited for power supply applications. The device comes in an 8-pin SOIC (Small Outline Integrated Circuit) package. Here's a brief overview of its pin functions:
1. VDD (Pin 1): Power supply input for the device.
2. GND (Pin 2): Ground reference point for all device operations.
3. OUT (Pin 3): The output pin that drives the power MOSFET.
4. CS (Pin 4): Current sense input for over-current protection.
5. RT/CT (Pin 5): A node used to set the oscillator frequency by connecting a resistor and capacitor.
6. FB (Pin 6): Feedback pin for voltage regulation.
7. COMP (Pin 7): Compensation pin for the error amplifier used to stabilize the control loop.
8. VREF (Pin 8): Reference voltage output.
Overall, the UCC3808DTR-2 is designed for use in power supply applications, offering efficient control and regulation for DC-DC conversion processes.
1. VDD (Pin 1): Power supply input for the device.
2. GND (Pin 2): Ground reference point for all device operations.
3. OUT (Pin 3): The output pin that drives the power MOSFET.
4. CS (Pin 4): Current sense input for over-current protection.
5. RT/CT (Pin 5): A node used to set the oscillator frequency by connecting a resistor and capacitor.
6. FB (Pin 6): Feedback pin for voltage regulation.
7. COMP (Pin 7): Compensation pin for the error amplifier used to stabilize the control loop.
8. VREF (Pin 8): Reference voltage output.
Overall, the UCC3808DTR-2 is designed for use in power supply applications, offering efficient control and regulation for DC-DC conversion processes.
Manufacturer
The UCC3808DTR-2 is manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and produces a wide range of electronic components and systems. TI's products are used in various applications, such as industrial, automotive, personal electronics, communications equipment, and enterprise systems. The company is known for its development of analog chips and embedded processors, among other semiconductor technologies. Texas Instruments is recognized for innovation, quality, and sustainability in the electronics industry.
Application
The UCC3808DTR-2 is a PWM controller typically used in power supply applications. Its application areas include:
1. DC-DC Converters: Used in step-up, step-down, or buck-boost configurations for efficient voltage conversion.
2. AC-DC Power Supplies: Integral in off-line and isolated converters, such as computer power supplies.
3. Battery Chargers: Efficiently manages charging operations in various battery-powered devices.
4. Industrial Power Systems: Supports power management in industrial automation and control systems.
5. Telecommunications: Utilized in power regulation for telecom infrastructure.
6. Consumer Electronics: Used in devices requiring stable and efficient power management.
These applications benefit from the UCC3808DTR-2's features like high-frequency operation, precise voltage regulation, and low start-up current.
1. DC-DC Converters: Used in step-up, step-down, or buck-boost configurations for efficient voltage conversion.
2. AC-DC Power Supplies: Integral in off-line and isolated converters, such as computer power supplies.
3. Battery Chargers: Efficiently manages charging operations in various battery-powered devices.
4. Industrial Power Systems: Supports power management in industrial automation and control systems.
5. Telecommunications: Utilized in power regulation for telecom infrastructure.
6. Consumer Electronics: Used in devices requiring stable and efficient power management.
These applications benefit from the UCC3808DTR-2's features like high-frequency operation, precise voltage regulation, and low start-up current.
Package
The UCC3808DTR-2 is a PWM controller IC that typically comes in an SOIC (Small Outline Integrated Circuit) package, specifically an 8-pin SOIC. This surface-mount package is designed for efficient space utilization on printed circuit boards.
