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UC2843BN
+BOMCURRENT MODE PWM CONTROLLER
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メーカーオンセミコンダクター社
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メーカー品番 #UC2843BN
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データシート UC2843BN DataSheet
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パッケージ PDIP-8
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在庫状況5575
365 日間品質保証
7*24 日間の品質保証
90-時間単位のサービス保証
1日間のアフターサービス保証
仕様
| 属性 | 値 |
| 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) | 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 | Through Hole |
| Package/Case | 8-DIP (0.300, 7.62mm) |
概要
Description
The UC2843BN is a high-performance, fixed-frequency current-mode PWM controller designed for DC-DC converters. It is part of the UCx84x family, which is widely used in power supply designs due to its efficiency and reliability. The UC2843BN operates at a fixed frequency, typically around 52 kHz, and provides precise control over power conversion processes. Key features include a low starting current, high maximum duty cycle, and adjustable deadtime control, which helps in optimizing performance and reducing electromagnetic interference.
This device integrates important features for power management, such as undervoltage lockout and current limiting, ensuring safe operation under various conditions. The UC2843BN is particularly favored in applications requiring efficient energy conversion and stable output, such as in telecommunications, automotive, and consumer electronics. It typically comes in an 8-pin DIP package, making it easy to implement in circuit designs. The UC2843BN is known for its robustness and ability to operate over a wide temperature range, making it suitable for both industrial and commercial applications.
This device integrates important features for power management, such as undervoltage lockout and current limiting, ensuring safe operation under various conditions. The UC2843BN is particularly favored in applications requiring efficient energy conversion and stable output, such as in telecommunications, automotive, and consumer electronics. It typically comes in an 8-pin DIP package, making it easy to implement in circuit designs. The UC2843BN is known for its robustness and ability to operate over a wide temperature range, making it suitable for both industrial and commercial applications.
Equivalent
The UC2843BN is a high-performance current-mode PWM controller. Equivalent products include:
1. UC3843: Similar specifications but can differ in temperature range and packaging.
2. KA3843: From Fairchild Semiconductor, with comparable features.
3. TL3843: Offered by Texas Instruments, similar performance.
4. MC33023: From ON Semiconductor, another alternative with similar functionality.
Always check datasheets for specific parameter matching.
1. UC3843: Similar specifications but can differ in temperature range and packaging.
2. KA3843: From Fairchild Semiconductor, with comparable features.
3. TL3843: Offered by Texas Instruments, similar performance.
4. MC33023: From ON Semiconductor, another alternative with similar functionality.
Always check datasheets for specific parameter matching.
Features
The UC2843BN is a high-performance, fixed-frequency, current-mode PWM controller commonly used in switch-mode power supplies and DC-DC converters. Key features include:
1. Current Mode Operation: Provides superior performance in controlling the output voltage and current, enhancing transient response and simplifying loop compensation.
2. Oscillator Frequency: Features a fixed oscillator frequency, typically set around 100 kHz, which can be adjusted using external resistors and capacitors.
3. Low-Start-Up Current: Consumes low current during start-up, which helps in efficient power management.
4. Undervoltage Lockout (UVLO): Ensures that the device starts operating only when the supply voltage reaches a safe level, preventing erratic operation.
5. Maximum Duty Cycle: Offers a maximum duty cycle of 100%, providing flexibility in operation.
6. Output Drive: The totem-pole output stage is capable of sourcing or sinking up to 1 A of peak current, suitable for driving power MOSFETs.
7. Error Amplifier: Comes with a high-gain error amplifier useful for precision feedback control.
These features make the UC2843BN ideal for a range of power control applications.
1. Current Mode Operation: Provides superior performance in controlling the output voltage and current, enhancing transient response and simplifying loop compensation.
2. Oscillator Frequency: Features a fixed oscillator frequency, typically set around 100 kHz, which can be adjusted using external resistors and capacitors.
3. Low-Start-Up Current: Consumes low current during start-up, which helps in efficient power management.
4. Undervoltage Lockout (UVLO): Ensures that the device starts operating only when the supply voltage reaches a safe level, preventing erratic operation.
5. Maximum Duty Cycle: Offers a maximum duty cycle of 100%, providing flexibility in operation.
6. Output Drive: The totem-pole output stage is capable of sourcing or sinking up to 1 A of peak current, suitable for driving power MOSFETs.
7. Error Amplifier: Comes with a high-gain error amplifier useful for precision feedback control.
These features make the UC2843BN ideal for a range of power control applications.
Pinout
The UC2843BN is an 8-pin integrated circuit (IC) from the UC2843 series, which is commonly used as a high-performance current-mode PWM controller for switching power supplies. Here is a concise description of its pin count and functions:
1. Pin 1 (COMP): This pin is used for compensating the error amplifier and controlling the PWM duty cycle.
2. Pin 2 (VFB): The inverting input of the error amplifier. It is typically connected to the output voltage via a resistor divider network to provide feedback.
3. Pin 3 (CS): Current Sense input. It monitors the current through the inductor and provides cycle-by-cycle current limiting.
4. Pin 4 (RT/CT): This pin sets the oscillator frequency with an external resistor (RT) and capacitor (CT).
5. Pin 5 (GND): The ground reference for the IC.
6. Pin 6 (OUT): This is the output pin where the PWM signal is generated to drive the gate of an external MOSFET.
7. Pin 7 (VCC): Supply voltage pin for the IC. It typically operates from 7V to 30V.
8. Pin 8 (VREF): This pin provides a 5V reference voltage output used for biasing other parts of the circuit.
The UC2843BN is widely used in DC-DC converters and off-line power supplies due to its robustness and efficiency.
1. Pin 1 (COMP): This pin is used for compensating the error amplifier and controlling the PWM duty cycle.
2. Pin 2 (VFB): The inverting input of the error amplifier. It is typically connected to the output voltage via a resistor divider network to provide feedback.
3. Pin 3 (CS): Current Sense input. It monitors the current through the inductor and provides cycle-by-cycle current limiting.
4. Pin 4 (RT/CT): This pin sets the oscillator frequency with an external resistor (RT) and capacitor (CT).
5. Pin 5 (GND): The ground reference for the IC.
6. Pin 6 (OUT): This is the output pin where the PWM signal is generated to drive the gate of an external MOSFET.
7. Pin 7 (VCC): Supply voltage pin for the IC. It typically operates from 7V to 30V.
8. Pin 8 (VREF): This pin provides a 5V reference voltage output used for biasing other parts of the circuit.
The UC2843BN is widely used in DC-DC converters and off-line power supplies due to its robustness and efficiency.
Manufacturer
The UC2843BN is manufactured by Texas Instruments, a global semiconductor company. Texas Instruments (TI) designs and manufactures a wide range of analog and embedded processing chips. It is known for its contributions to the electronics industry, providing components for consumer electronics, industrial equipment, automotive systems, and more. TI focuses on innovation and efficiency, aiming to create products that are both high-performance and cost-effective.
Application
The UC2843BN is a high-performance current-mode PWM controller commonly used in power electronics applications. Its primary application areas include:
1. Switching Power Supplies: Used in designing efficient AC/DC and DC/DC converters for consumer electronics, industrial equipment, and communication systems.
2. Battery Chargers: Implements precise voltage and current regulation for battery charging circuits.
3. LED Drivers: Utilized in driving LEDs with stable current, enhancing brightness and longevity.
4. Motor Control: Provides efficient motor speed control by regulating power delivery.
5. Inverters: Facilitates conversion of DC to AC in renewable energy systems like solar inverters.
These applications benefit from its features like low startup current, high-speed operation, and reliability.
1. Switching Power Supplies: Used in designing efficient AC/DC and DC/DC converters for consumer electronics, industrial equipment, and communication systems.
2. Battery Chargers: Implements precise voltage and current regulation for battery charging circuits.
3. LED Drivers: Utilized in driving LEDs with stable current, enhancing brightness and longevity.
4. Motor Control: Provides efficient motor speed control by regulating power delivery.
5. Inverters: Facilitates conversion of DC to AC in renewable energy systems like solar inverters.
These applications benefit from its features like low startup current, high-speed operation, and reliability.
Package
The UC2843BN is a high-performance current-mode PWM controller, typically housed in an 8-pin Dual In-line Package (DIP-8). This package is designed for ease of use in various power supply applications.
