Спецификации
| Атрибут | Ценность |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| 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 | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
Обзор
Description
The UCC2808DTR-2 is a high-performance, dual-output current mode PWM controller designed for use in off-line and DC-to-DC converter applications. It is part of Texas Instruments' UCC2808 series and is optimized for high-frequency operation, providing efficient power regulation in compact designs. This device features an internal 1 MHz oscillator, low-startup current, and a precision reference. It supports push-pull, half-bridge, or full-bridge topologies.
Key features include current-mode control for improved transient response, pulse-by-pulse current limiting, and under-voltage lockout for reliable operation. The UCC2808DTR-2 is typically used in applications requiring isolated power supplies, such as telecommunications, networking equipment, and industrial control systems.
The device is available in a small outline (SOIC) package, making it suitable for space-constrained applications. Its robust design and flexibility enable engineers to efficiently design power supplies with enhanced performance and reliability. For more detailed specifications, reference the datasheet provided by Texas Instruments.
Key features include current-mode control for improved transient response, pulse-by-pulse current limiting, and under-voltage lockout for reliable operation. The UCC2808DTR-2 is typically used in applications requiring isolated power supplies, such as telecommunications, networking equipment, and industrial control systems.
The device is available in a small outline (SOIC) package, making it suitable for space-constrained applications. Its robust design and flexibility enable engineers to efficiently design power supplies with enhanced performance and reliability. For more detailed specifications, reference the datasheet provided by Texas Instruments.
Equivalent
The UCC2808DTR-2 is a dual PWM controller from Texas Instruments used in power supply applications. Equivalent products may include:
1. UCC2808A-2: Slightly different version with similar functionality.
2. UC3823: Another Texas Instruments PWM controller with similar specs.
3. NCP1200: From ON Semiconductor, suitable for similar applications.
4. SG3525A: A widely used PWM controller from multiple manufacturers.
Ensure to match specifications like input voltage, frequency, and package type when considering alternatives.
1. UCC2808A-2: Slightly different version with similar functionality.
2. UC3823: Another Texas Instruments PWM controller with similar specs.
3. NCP1200: From ON Semiconductor, suitable for similar applications.
4. SG3525A: A widely used PWM controller from multiple manufacturers.
Ensure to match specifications like input voltage, frequency, and package type when considering alternatives.
Features
The UCC2808DTR-2 is a high-performance, BiCMOS, current-mode Pulse Width Modulation (PWM) controller designed primarily for designing low to medium power off-line and DC-DC converters. Key features include:
1. Low Start-Up Current: It requires minimal start-up current, enhancing efficiency and reducing power consumption in standby mode.
2. Wide Supply Voltage Range: Capable of operating over a broad voltage range, facilitating versatility in various applications.
3. Fixed Frequency Operation: Operates at a fixed frequency, providing consistent performance and simplifying design requirements.
4. Precision Voltage Reference: Ensures accurate output voltage regulation, crucial for applications demanding tight voltage tolerances.
5. Programmable Oscillator: Allows frequency setting by external components, offering flexibility in application design.
6. Current Mode Control: Provides inherent cycle-by-cycle current limiting, improving transient response and simplifying feedback loop design.
7. Undervoltage Lockout (UVLO): Protects the system by shutting down the controller when the voltage is below a specified threshold.
8. Soft Start Capability: Introduces gradual power application during startup to prevent inrush current and stress on components.
These features make the UCC2808DTR-2 ideal for efficient, reliable, and flexible power supply designs.
1. Low Start-Up Current: It requires minimal start-up current, enhancing efficiency and reducing power consumption in standby mode.
2. Wide Supply Voltage Range: Capable of operating over a broad voltage range, facilitating versatility in various applications.
3. Fixed Frequency Operation: Operates at a fixed frequency, providing consistent performance and simplifying design requirements.
4. Precision Voltage Reference: Ensures accurate output voltage regulation, crucial for applications demanding tight voltage tolerances.
5. Programmable Oscillator: Allows frequency setting by external components, offering flexibility in application design.
6. Current Mode Control: Provides inherent cycle-by-cycle current limiting, improving transient response and simplifying feedback loop design.
7. Undervoltage Lockout (UVLO): Protects the system by shutting down the controller when the voltage is below a specified threshold.
8. Soft Start Capability: Introduces gradual power application during startup to prevent inrush current and stress on components.
These features make the UCC2808DTR-2 ideal for efficient, reliable, and flexible power supply designs.
Pinout
The UCC2808DTR-2 is an 8-pin integrated circuit designed by Texas Instruments. It is a high-performance, current-mode PWM controller, typically used in isolated and non-isolated DC-DC converter applications. The device's pins and their functions are as follows:
1. VREF: Reference Voltage Output, typically 5V.
2. COMP: Error Amplifier Output for loop compensation.
3. CS: Current Sense input for current-mode control.
4. RT/CT: Timing Resistor and Capacitor connection to set the oscillator frequency.
5. GND: Ground reference for the device.
6. OUTA: Output A, drive for the first external power switch.
7. VDD: Supply voltage input for the IC.
8. OUTB: Output B, drive for the second external power switch.
This IC is commonly used in power supply designs due to its efficiency and ability to handle various power levels, contributing to optimized performance in applications requiring precise voltage regulation and efficient power conversion.
1. VREF: Reference Voltage Output, typically 5V.
2. COMP: Error Amplifier Output for loop compensation.
3. CS: Current Sense input for current-mode control.
4. RT/CT: Timing Resistor and Capacitor connection to set the oscillator frequency.
5. GND: Ground reference for the device.
6. OUTA: Output A, drive for the first external power switch.
7. VDD: Supply voltage input for the IC.
8. OUTB: Output B, drive for the second external power switch.
This IC is commonly used in power supply designs due to its efficiency and ability to handle various power levels, contributing to optimized performance in applications requiring precise voltage regulation and efficient power conversion.
Manufacturer
The UCC2808DTR-2 is manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and produces a wide range of analog and embedded processing chips. TI is known for its innovation in the electronics industry, providing components that are used in various electronic devices and systems across different sectors, including industrial, automotive, personal electronics, and communications equipment. As a leader in the semiconductor industry, Texas Instruments focuses on developing high-performance products that meet the needs of modern technology applications.
Application
The UCC2808DTR-2 is a high-performance, low-power PWM controller designed primarily for off-line and DC-DC converter applications. It is commonly used in isolated and non-isolated power supply designs, such as flyback converters, boost converters, and forward converters. Key application areas include:
1. AC/DC adapters
2. Battery chargers
3. Distributed power systems
4. Industrial power supplies
5. Consumer electronics
6. Telecommunications equipment
Its compact design, integrated features, and efficiency make it ideal for applications requiring precise power regulation and high efficiency in space-constrained environments.
1. AC/DC adapters
2. Battery chargers
3. Distributed power systems
4. Industrial power supplies
5. Consumer electronics
6. Telecommunications equipment
Its compact design, integrated features, and efficiency make it ideal for applications requiring precise power regulation and high efficiency in space-constrained environments.
Package
The UCC2808DTR-2 is a high-performance current mode PWM controller from Texas Instruments, typically used in power supply applications. It is available in an 8-pin SOIC (Small Outline Integrated Circuit) package. This package type is compact and suitable for surface-mount technology.
