Specifications
| Attribute | Value |
| Package | Tube |
| ProductStatus | Obsolete |
| 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) | 10V ~ 30V |
| Frequency-Switching | Up to 500kHz |
| DutyCycle(Max) | 96% |
| SynchronousRectifier | No |
| ClockSync | No |
| ControlFeatures | Frequency Control |
| OperatingTemperature | -25°C ~ 85°C (TA) |
| MountingType | Through Hole |
| Package/Case | 8-DIP (0.300, 7.62mm) |
Overview
Description
The UC2842BN is a high-performance, fixed-frequency current-mode PWM controller designed for efficient power management in various electronic applications. It is part of the UC284x family, renowned for its stability and versatility in controlling power supplies and converters. The controller operates at a fixed frequency, making it ideal for applications requiring precise timing and minimal oscillation.
Key features of the UC2842BN include a low start-up current, high gain bandwidth amplifier, and a fast PWM latch, which together enhance efficiency and responsiveness. The device supports a wide input voltage range and provides robust protection features such as undervoltage lockout and current limiting, ensuring reliable operation under diverse conditions.
Its pin configuration typically includes pins for compensation, voltage feedback, current sense, and a reference voltage, allowing for flexible design integration. The UC2842BN is widely used in power supplies, voltage regulation modules, and other systems that require efficient and reliable power control. Its ease of use and robust performance make it a popular choice for engineers designing power management solutions.
Key features of the UC2842BN include a low start-up current, high gain bandwidth amplifier, and a fast PWM latch, which together enhance efficiency and responsiveness. The device supports a wide input voltage range and provides robust protection features such as undervoltage lockout and current limiting, ensuring reliable operation under diverse conditions.
Its pin configuration typically includes pins for compensation, voltage feedback, current sense, and a reference voltage, allowing for flexible design integration. The UC2842BN is widely used in power supplies, voltage regulation modules, and other systems that require efficient and reliable power control. Its ease of use and robust performance make it a popular choice for engineers designing power management solutions.
Equivalent
The UC2842BN chip is a high-performance current-mode PWM controller commonly used in switch-mode power supplies. Equivalent products include:
1. TL2842
2. LM2842
3. UC3842
4. MC34063
5. SG6842
These equivalents may vary slightly in specifications, so it's important to review the datasheets to ensure compatibility with your specific application.
1. TL2842
2. LM2842
3. UC3842
4. MC34063
5. SG6842
These equivalents may vary slightly in specifications, so it's important to review the datasheets to ensure compatibility with your specific application.
Features
The UC2842BN is a fixed-frequency, current-mode PWM controller widely used in power supply designs. Key features include:
1. Current-Mode Control: Provides improved performance and simplified loop compensation compared to voltage-mode controllers.
2. High-Speed Oscillator: Operates typically at 52 kHz, with the ability to adjust via external resistors and capacitors.
3. Low Start-Up Current: Draws minimal current during start-up to improve efficiency.
4. Undervoltage Lockout (UVLO): Ensures the chip only operates when the supply voltage is above a certain threshold, enhancing reliability.
5. Precision Reference: Includes a 2.5V reference with tight tolerance for consistent performance.
6. High Output Drive: Capable of driving power MOSFETs or bipolar transistors directly.
7. Leading-Edge Blanking: Reduces the need for external filtering by masking the leading-edge spike on the current sense signal.
These features make the UC2842BN suitable for a wide range of AC-DC and DC-DC conversion applications.
1. Current-Mode Control: Provides improved performance and simplified loop compensation compared to voltage-mode controllers.
2. High-Speed Oscillator: Operates typically at 52 kHz, with the ability to adjust via external resistors and capacitors.
3. Low Start-Up Current: Draws minimal current during start-up to improve efficiency.
4. Undervoltage Lockout (UVLO): Ensures the chip only operates when the supply voltage is above a certain threshold, enhancing reliability.
5. Precision Reference: Includes a 2.5V reference with tight tolerance for consistent performance.
6. High Output Drive: Capable of driving power MOSFETs or bipolar transistors directly.
7. Leading-Edge Blanking: Reduces the need for external filtering by masking the leading-edge spike on the current sense signal.
These features make the UC2842BN suitable for a wide range of AC-DC and DC-DC conversion applications.
Pinout
The UC2842BN is a high-performance, fixed-frequency PWM (Pulse Width Modulation) controller, commonly used for power supply and converter designs. It has an 8-pin configuration. Here is a brief overview of its pin functions:
1. Comp (Pin 1): This is the compensation pin used to stabilize the control loop with an external network.
2. VFB (Pin 2): Voltage feedback input, typically connected to a voltage divider from the output to monitor the output voltage level.
3. I_SENSE (Pin 3): Current sense input for current-mode control. It is used to sense the output current for protection and regulation purposes.
4. RT/CT (Pin 4): This pin connects to an external resistor and capacitor to set the oscillator frequency.
5. GND (Pin 5): Ground reference for the IC.
6. Output (Pin 6): The PWM signal output that drives the gate of a MOSFET or transistor in the power stage.
7. VCC (Pin 7): Supply voltage pin, providing the necessary power for the device operation.
8. VREF (Pin 8): A reference voltage output, typically 5V, used for various internal and external applications in the control circuit.
This IC is popular in applications requiring efficient and precise power regulation.
1. Comp (Pin 1): This is the compensation pin used to stabilize the control loop with an external network.
2. VFB (Pin 2): Voltage feedback input, typically connected to a voltage divider from the output to monitor the output voltage level.
3. I_SENSE (Pin 3): Current sense input for current-mode control. It is used to sense the output current for protection and regulation purposes.
4. RT/CT (Pin 4): This pin connects to an external resistor and capacitor to set the oscillator frequency.
5. GND (Pin 5): Ground reference for the IC.
6. Output (Pin 6): The PWM signal output that drives the gate of a MOSFET or transistor in the power stage.
7. VCC (Pin 7): Supply voltage pin, providing the necessary power for the device operation.
8. VREF (Pin 8): A reference voltage output, typically 5V, used for various internal and external applications in the control circuit.
This IC is popular in applications requiring efficient and precise power regulation.
Manufacturer
The UC2842BN is manufactured by Texas Instruments. Texas Instruments is a technology company that designs and manufactures semiconductors and integrated circuits. It is one of the largest and most well-known companies in the electronics industry, providing solutions for a wide range of applications, including automotive, industrial, personal electronics, communications equipment, and more. Texas Instruments is renowned for its innovations in analog electronics, digital signal processing, and embedded systems.
Application
The UC2842BN is a high-performance current-mode PWM controller commonly used in power supply and power management applications. Its primary applications include:
1. Switch-Mode Power Supplies (SMPS): Used in various electronics for efficient power conversion.
2. DC-DC Converters: Essential for voltage regulation in portable devices and telecom systems.
3. AC-DC Converters: Utilized for converting AC input to regulated DC output in industrial and consumer products.
4. Battery Chargers: Ensures precise charging cycles for various battery types.
5. Voltage Regulation: Maintains stable voltage in power distribution systems.
6. Lighting Ballasts: Supports efficient control of lighting systems.
These applications benefit from the UC2842BN's precision current limiting and flexible operation.
1. Switch-Mode Power Supplies (SMPS): Used in various electronics for efficient power conversion.
2. DC-DC Converters: Essential for voltage regulation in portable devices and telecom systems.
3. AC-DC Converters: Utilized for converting AC input to regulated DC output in industrial and consumer products.
4. Battery Chargers: Ensures precise charging cycles for various battery types.
5. Voltage Regulation: Maintains stable voltage in power distribution systems.
6. Lighting Ballasts: Supports efficient control of lighting systems.
These applications benefit from the UC2842BN's precision current limiting and flexible operation.
Package
The UC2842BN is available in a PDIP (Plastic Dual In-line Package) package type. This form factor is commonly used for facilitating easy handling and mounting on printed circuit boards.
