TOP256PN

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Efficiency, Low Standby Power, Wide Input Voltage Range
• Package: DIP-7C
• Essence: Offline Switcher
• Packaging/Quantity: Tube/50 pieces

Specifications

• Input Voltage Range: 85VAC to 265VAC
• Output Power: Up to 45W
• Switching Frequency: 132 kHz
• Operating Temperature Range: -40°C to +150°C
• Protection Features: Overload Protection, Overvoltage Protection, Overtemperature Protection

Detailed Pin Configuration

1. VCC: Supply Voltage for Internal Control Circuitry
2. GND: Ground
3. FB: Feedback Pin for Output Voltage Regulation
4. DRAIN: High-Voltage Power MOSFET Drain Connection
5. SOURCE: High-Voltage Power MOSFET Source Connection
6. COMP: Compensation Pin for Loop Stability
7. SENSE: Current Sense Pin for Primary-Side Overload Protection

Functional Features

• Primary-Side Control: Eliminates the need for an optocoupler and secondary-side feedback components.
• Frequency Jittering: Reduces EMI emissions.
• Auto-Restart: Recovers from fault conditions automatically.
• Cycle-by-Cycle Current Limiting: Provides accurate overload protection.

Advantages

• High efficiency, reducing power consumption and heat dissipation.
• Low standby power, meeting energy-saving requirements.
• Wide input voltage range, suitable for various applications.
• Integrated protection features ensure system reliability.
• Primary-side control simplifies circuit design and reduces component count.

Disadvantages

• Limited output power compared to higher-rated devices.
• Requires careful consideration of thermal management due to high operating temperature range.
• Not suitable for applications requiring very low standby power.

Working Principles

The TOP256PN is an offline switcher IC that utilizes primary-side control to regulate the output voltage. It operates by converting the input AC voltage into a high-frequency AC signal, which is then rectified and filtered to provide a regulated DC output voltage. The primary-side control eliminates the need for an optocoupler and secondary-side feedback components, simplifying the circuit design and reducing cost.

Detailed Application Field Plans

The TOP256PN is commonly used in various power management applications, including:

1. Power Adapters: Provides efficient power conversion for laptops, smartphones, and other electronic devices.
2. LED Lighting: Enables high-efficiency LED drivers for residential, commercial, and industrial lighting applications.
3. Home Appliances: Facilitates power supply solutions for refrigerators, air conditioners, and other household appliances.
4. Industrial Equipment: Supports power management in industrial automation systems, motor drives, and control circuits.

Detailed and Complete Alternative Models

1. TOP257PN: Similar functionality with higher output power capability.
2. TOP258PN: Enhanced version with additional protection features and wider input voltage range.
3. TOP259PN: Higher-rated device with extended operating temperature range and improved efficiency.

Note: This is not an exhaustive list of alternative models. Please refer to the manufacturer's datasheet for a complete list.

This entry provides an overview of the TOP256PN integrated circuit, including its product category, use, characteristics, package, and specifications. It also includes detailed information on pin configuration, functional features, advantages, disadvantages, working principles, application field plans, and alternative models.