仕様
| 属性 | 値 |
| Package | Tape & Reel (TR),Cut Tape (CT),Bulk |
| ProductStatus | Active |
| OutputType | Transistor Driver |
| Function | Step-Up, Step-Up/Step-Down |
| OutputConfiguration | Positive, Isolation Capable |
| Topology | Boost, Flyback |
| NumberofOutputs | 1 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 7.6V ~ 30V |
| Frequency-Switching | Up to 500kHz |
| DutyCycle(Max) | 96% |
| SynchronousRectifier | No |
| ClockSync | No |
| ControlFeatures | Frequency Control |
| OperatingTemperature | -25°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
概要
Description
The UC2843BD1R2G is a high-performance fixed frequency current mode controller, primarily used in switching power supplies. Manufactured by ON Semiconductor, this device is designed for efficient operation in both continuous and discontinuous conduction modes, making it suitable for a wide range of power supply designs. Key features include a high-speed oscillator, precise duty cycle control, and a low start-up current, which contribute to its efficiency and reliability.
The controller offers a UVLO (Under Voltage Lockout) feature, ensuring the device operates correctly from the start. It has a temperature-compensated reference to maintain stability across varying temperatures, and built-in protections against overcurrent and short circuits. The UC2843BD1R2G comes in an SOIC-8 package, which is compact and allows for easy integration into circuit designs.
Overall, the UC2843BD1R2G is ideal for applications that require efficient power conversion with robust control features, such as in AC/DC converters, industrial power supplies, and other electronic circuits requiring precise power management.
The controller offers a UVLO (Under Voltage Lockout) feature, ensuring the device operates correctly from the start. It has a temperature-compensated reference to maintain stability across varying temperatures, and built-in protections against overcurrent and short circuits. The UC2843BD1R2G comes in an SOIC-8 package, which is compact and allows for easy integration into circuit designs.
Overall, the UC2843BD1R2G is ideal for applications that require efficient power conversion with robust control features, such as in AC/DC converters, industrial power supplies, and other electronic circuits requiring precise power management.
Equivalent
The UC2843BD1R2G is a current-mode PWM controller. Equivalent products include:
1. UC3843 series from Texas Instruments
2. MC33023 series from ON Semiconductor
3. TL3843 series from Texas Instruments
4. NCP1203 series from ON Semiconductor
5. SG1843 series from Microsemi
These alternatives offer similar functionalities and can be used in place of the UC2843BD1R2G in compatible applications. Always verify specifications and pin configurations before use.
1. UC3843 series from Texas Instruments
2. MC33023 series from ON Semiconductor
3. TL3843 series from Texas Instruments
4. NCP1203 series from ON Semiconductor
5. SG1843 series from Microsemi
These alternatives offer similar functionalities and can be used in place of the UC2843BD1R2G in compatible applications. Always verify specifications and pin configurations before use.
Features
The UC2843BD1R2G is a high-performance, fixed-frequency, current-mode PWM controller commonly used in DC-DC converters and off-line power supplies. Key features include:
1. Current-Mode Control: Provides improved transient response and simplified loop compensation.
2. Fixed Frequency Oscillator: Ensures predictable performance and simplifies system design.
3. High-Speed Operation: Capable of driving MOSFETs through high-speed totem-pole outputs.
4. Undervoltage Lockout (UVLO): Protects the system from operating at insufficient supply voltages.
5. Low Start-Up and Operating Current: Reduces power consumption, enhancing efficiency.
6. Wide Operating Voltage Range: Compatible with various power supply designs.
7. Programmable Duty Cycle: Offers flexibility in controlling output power.
8. Low Total Harmonic Distortion: Ensures cleaner power delivery.
These features make the UC2843BD1R2G ideal for efficient and reliable power conversion in diverse applications.
1. Current-Mode Control: Provides improved transient response and simplified loop compensation.
2. Fixed Frequency Oscillator: Ensures predictable performance and simplifies system design.
3. High-Speed Operation: Capable of driving MOSFETs through high-speed totem-pole outputs.
4. Undervoltage Lockout (UVLO): Protects the system from operating at insufficient supply voltages.
5. Low Start-Up and Operating Current: Reduces power consumption, enhancing efficiency.
6. Wide Operating Voltage Range: Compatible with various power supply designs.
7. Programmable Duty Cycle: Offers flexibility in controlling output power.
8. Low Total Harmonic Distortion: Ensures cleaner power delivery.
These features make the UC2843BD1R2G ideal for efficient and reliable power conversion in diverse applications.
Pinout
The UC2843BD1R2G is an integrated circuit designed for use in fixed-frequency, current-mode control applications, commonly found in power supply designs. It is part of the UC284x family of PWM controllers.
This IC typically comes in an 8-pin package. Here is a concise description of the pin functions:
1. Compensation (COMP): Output of the error amplifier and input to the PWM comparator. Used to stabilize the control loop with external components.
2. Voltage Feedback (VFB): Negative input to the error amplifier. Typically connected to an external voltage divider from the power supply output.
3. Current Sense (ISENSE): Input for current sensing. Monitors the current through the power switch for current-mode control.
4. RT/CT: Sets the oscillator frequency with an external resistor and capacitor.
5. Ground (GND): Common ground reference for the IC.
6. Output (OUT): Drives the gate of the external transistor switch. Outputs the PWM signal.
7. VCC: Supply voltage for the IC.
8. VREF: Reference voltage output, typically used for biasing other parts of the circuit.
These pins provide the necessary interfaces for controlling the power supply's output and feedback mechanisms.
This IC typically comes in an 8-pin package. Here is a concise description of the pin functions:
1. Compensation (COMP): Output of the error amplifier and input to the PWM comparator. Used to stabilize the control loop with external components.
2. Voltage Feedback (VFB): Negative input to the error amplifier. Typically connected to an external voltage divider from the power supply output.
3. Current Sense (ISENSE): Input for current sensing. Monitors the current through the power switch for current-mode control.
4. RT/CT: Sets the oscillator frequency with an external resistor and capacitor.
5. Ground (GND): Common ground reference for the IC.
6. Output (OUT): Drives the gate of the external transistor switch. Outputs the PWM signal.
7. VCC: Supply voltage for the IC.
8. VREF: Reference voltage output, typically used for biasing other parts of the circuit.
These pins provide the necessary interfaces for controlling the power supply's output and feedback mechanisms.
Manufacturer
The UC2843BD1R2G is manufactured by ON Semiconductor, which is now known as onsemi. Onsemi is a leading semiconductor company that designs and manufactures a wide range of high-performance silicon solutions for energy-efficient electronics. The company is known for providing products and services for a variety of applications including automotive, industrial, cloud power, and IoT. Onsemi focuses on innovations that help reduce global energy use by offering a broad portfolio of energy-efficient solutions.
Application
The UC2843BD1R2G is a fixed-frequency PWM controller used in various power management applications. Its primary application areas include:
1. Switching Power Supplies: Used in AC-DC and DC-DC converters for efficient voltage regulation and power conversion.
2. Telecommunications: Facilitates power conversion in telecom equipment.
3. Battery Chargers: Manages charging cycles for optimal battery performance.
4. Motor Control: Provides efficient control in brushless DC motor applications.
5. Consumer Electronics: Powers devices like televisions, computers, and gaming consoles.
6. Industrial Power Systems: Used in industrial automation and control systems for reliable power management.
These applications take advantage of the controller's high-performance features, such as its high-speed operation and low standby current.
1. Switching Power Supplies: Used in AC-DC and DC-DC converters for efficient voltage regulation and power conversion.
2. Telecommunications: Facilitates power conversion in telecom equipment.
3. Battery Chargers: Manages charging cycles for optimal battery performance.
4. Motor Control: Provides efficient control in brushless DC motor applications.
5. Consumer Electronics: Powers devices like televisions, computers, and gaming consoles.
6. Industrial Power Systems: Used in industrial automation and control systems for reliable power management.
These applications take advantage of the controller's high-performance features, such as its high-speed operation and low standby current.
Package
The UC2843BD1R2G is typically available in a SOIC-8 package, which is a small outline integrated circuit package with 8 pins. This package type is widely used for surface mounting on PCBs, providing a compact form factor for electronic components.
