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TL3842P
IC REG CTRLR BST FLYBK PWM 8-DIP
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規格
| Package | Tube |
| ProductStatus | Active |
| OutputType | Transistor Driver |
| Function | Step-Up, Step-Up/Step-Down |
| OutputConfiguration | Positive |
| Topology | Boost, Flyback, Forward |
| NumberofOutputs | 1 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 10V ~ 30V |
| Frequency-Switching | Up to 500kHz |
| DutyCycle(Max) | 97% |
| SynchronousRectifier | No |
| ClockSync | No |
| ControlFeatures | Frequency Control |
| OperatingTemperature | 0°C ~ 70°C (TA) |
| MountingType | Through Hole |
| Package/Case | 8-DIP (0.300, 7.62mm) |
概述
Description
The TL3842P is a fixed frequency current-mode PWM (pulse width modulation) controller, often used in power supply applications. It is designed for efficient power management in various electronic devices, ensuring stable voltage outputs and improved regulation. Key features include a high-performance transistor, adjustable oscillator frequency, and built-in protections like under-voltage lockout and current limiting. The TL3842P is particularly suited for off-line and DC-to-DC converter applications due to its ability to provide precise control over the switching process, enhancing efficiency and reliability. Its versatility and robust design make it popular in consumer electronics, industrial controls, and automotive applications.
Features
The TL3842P is a fixed-frequency current-mode controller used in power supply designs. Key features include:
1. Current Mode Control: Provides improved performance for voltage regulation, transient response, and loop stability.
2. Fixed-Frequency Operation: Typically operates at a fixed frequency around 100 kHz, depending on external components.
3. High-Performance Current Limiting: Employs cycle-by-cycle current limiting to protect against overcurrent conditions.
4. Low Start-Up and Operating Current: Features low start-up (0.5 mA typical) and operating current (17 mA maximum) to enhance efficiency.
5. Built-In Soft Start: Gradually increases the duty cycle at start-up to prevent current spikes.
6. Undervoltage Lockout (UVLO): Ensures the controller starts up only when the supply voltage is within safe limits.
7. Pin Configuration: Comes in an 8-pin DIP package, which is easy to integrate into various circuit designs.
8. Output Drive Capability: Can drive power MOSFETs directly, supporting medium to high power applications.
These features make the TL3842P suitable for use in offline and DC-DC converter applications, such as in power supplies for consumer electronics and industrial systems.
1. Current Mode Control: Provides improved performance for voltage regulation, transient response, and loop stability.
2. Fixed-Frequency Operation: Typically operates at a fixed frequency around 100 kHz, depending on external components.
3. High-Performance Current Limiting: Employs cycle-by-cycle current limiting to protect against overcurrent conditions.
4. Low Start-Up and Operating Current: Features low start-up (0.5 mA typical) and operating current (17 mA maximum) to enhance efficiency.
5. Built-In Soft Start: Gradually increases the duty cycle at start-up to prevent current spikes.
6. Undervoltage Lockout (UVLO): Ensures the controller starts up only when the supply voltage is within safe limits.
7. Pin Configuration: Comes in an 8-pin DIP package, which is easy to integrate into various circuit designs.
8. Output Drive Capability: Can drive power MOSFETs directly, supporting medium to high power applications.
These features make the TL3842P suitable for use in offline and DC-DC converter applications, such as in power supplies for consumer electronics and industrial systems.
Package
The TL3842P is a fixed frequency current-mode PWM controller. The "P" in TL3842P indicates a DIP-8 (Dual Inline Package with 8 pins) package type.
Pinout
The TL3842P is an integrated circuit used for switch-mode power supply applications, especially in PWM (Pulse Width Modulation) controllers. It typically comes in an 8-pin DIP (Dual In-line Package) configuration. Here's a brief overview of its pin functions:
1. Pin 1 (COMP): Compensation. Used to compensate the control loop.
2. Pin 2 (VFB): Voltage Feedback. Receives the feedback voltage from the power supply output to regulate the PWM.
3. Pin 3 (Current Sense): Monitors the current through the power MOSFET and provides current limiting.
4. Pin 4 (RT/CT): Timing Resistor/Capacitor. Sets the oscillator frequency.
5. Pin 5 (GND): Ground. Common return path for power and signals.
6. Pin 6 (Output): Drives the gate of the power MOSFET.
7. Pin 7 (VCC): Supply Voltage. Powers the IC.
8. Pin 8 (VREF): Reference Voltage. Provides a stable voltage reference for internal circuitry.
These pins work together to implement a control scheme that regulates power supply output by varying PWM duty cycles based on feedback and current sensing inputs.
1. Pin 1 (COMP): Compensation. Used to compensate the control loop.
2. Pin 2 (VFB): Voltage Feedback. Receives the feedback voltage from the power supply output to regulate the PWM.
3. Pin 3 (Current Sense): Monitors the current through the power MOSFET and provides current limiting.
4. Pin 4 (RT/CT): Timing Resistor/Capacitor. Sets the oscillator frequency.
5. Pin 5 (GND): Ground. Common return path for power and signals.
6. Pin 6 (Output): Drives the gate of the power MOSFET.
7. Pin 7 (VCC): Supply Voltage. Powers the IC.
8. Pin 8 (VREF): Reference Voltage. Provides a stable voltage reference for internal circuitry.
These pins work together to implement a control scheme that regulates power supply output by varying PWM duty cycles based on feedback and current sensing inputs.
Manufacturer
The TL3842P is manufactured by Texas Instruments (TI). Texas Instruments is an American technology company that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. TI is one of the top ten semiconductor companies worldwide, known for its innovation and production in analog chips and embedded processors, among other product lines.
Application
The TL3842P is a versatile PWM controller primarily used in switch-mode power supplies and DC-DC converters. It is ideal for applications requiring efficient power regulation and control, such as computer power supplies, battery chargers, and industrial power systems. The controller offers precise regulation, high-frequency operation, and robust performance, making it suitable for applications demanding compact size and high efficiency.
Equivalent
The TL3842P is a current-mode PWM controller used in power supply applications. Equivalent products include:
1. UC3842
2. KA3842
3. LM3842
4. NCP3842
5. SG3842
These components share similar functionalities and are often pin-compatible, making them interchangeable in many applications. Always verify specific requirements and specifications before substitution to ensure compatibility with your circuit.
1. UC3842
2. KA3842
3. LM3842
4. NCP3842
5. SG3842
These components share similar functionalities and are often pin-compatible, making them interchangeable in many applications. Always verify specific requirements and specifications before substitution to ensure compatibility with your circuit.
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