TOP254GN-TL

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Efficiency, Low Standby Power, Wide Input Voltage Range
• Package: TO-220-7C
• Essence: Switching Power Supply Controller
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 85VAC to 265VAC
• Output Power: Up to 45W
• Frequency Range: 50kHz to 300kHz
• Operating Temperature Range: -40°C to +150°C
• Protection Features: Overvoltage Protection, Overcurrent Protection, Overtemperature Protection

Detailed Pin Configuration

1. VDD: Power Supply Voltage
2. FB: Feedback Pin for Output Voltage Regulation
3. GND: Ground
4. DRAIN: Switching Transistor Drain Connection
5. SOURCE: Switching Transistor Source Connection
6. COMP: Compensation Pin for Loop Stability
7. CS: Current Sense Pin for Overcurrent Protection

Functional Features

• Primary-Side Control: Eliminates the need for an optocoupler and secondary-side feedback circuitry.
• Frequency Jittering: Reduces EMI emissions and improves system reliability.
• Auto-Restart Protection: Automatically restarts the power supply after a fault condition is removed.
• Cycle-by-Cycle Current Limiting: Provides accurate overcurrent protection.

Advantages

• High efficiency leads to reduced power consumption and lower operating costs.
• Low standby power helps meet energy-saving requirements.
• Wide input voltage range allows for worldwide compatibility.
• Integrated protection features enhance system reliability and safety.
• Primary-side control simplifies circuit design and reduces component count.

Disadvantages

• Requires careful consideration of component selection and layout to minimize EMI emissions.
• Limited output power compared to some other power management ICs.
• Higher cost compared to non-switching power supply solutions.

Working Principles

The TOP254GN-TL is a primary-side control switching power supply controller. It operates by regulating the duty cycle of the switching transistor based on the feedback received from the FB pin. This control method eliminates the need for an optocoupler and secondary-side feedback circuitry, simplifying the design and reducing costs. The frequency jittering feature reduces electromagnetic interference (EMI) emissions, while the auto-restart protection ensures that the power supply automatically restarts after a fault condition is removed. The cycle-by-cycle current limiting provides accurate overcurrent protection.

Detailed Application Field Plans

The TOP254GN-TL is commonly used in various applications, including:

1. AC/DC Power Supplies: Provides efficient power conversion for consumer electronics, industrial equipment, and lighting systems.
2. LED Drivers: Enables precise control of LED brightness and ensures high efficiency.
3. Battery Chargers: Facilitates fast and reliable charging of batteries in portable devices and electric vehicles.
4. Audio Amplifiers: Delivers stable power supply voltage for audio amplification circuits.
5. Industrial Control Systems: Powers various control modules and sensors in industrial automation systems.

Detailed and Complete Alternative Models

1. TOP253GN-TL: Similar functionality with lower output power capability.
2. TOP255GN-TL: Similar functionality with higher output power capability.
3. TOP256GN-TL: Similar functionality with additional features like line undervoltage lockout.

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