TOP255MG

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Efficiency, Low Standby Power, Wide Input Voltage Range
• Package: 7-Lead TO-220
• Essence: Switching Regulator Controller
• Packaging/Quantity: Tube/50 pieces per tube

Specifications

• Input Voltage Range: 9V to 38V
• Output Voltage Range: 5V to 24V
• Switching Frequency: 132 kHz
• Maximum Output Power: 45W
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

1. VCC: Supply voltage input
2. GND: Ground reference
3. FB: Feedback pin for output voltage regulation
4. COMP: Compensation pin for loop stability
5. DRAIN: High-voltage power MOSFET drain connection
6. SOURCE: High-voltage power MOSFET source connection
7. CS: Current sense pin for overcurrent protection

Functional Features

• Integrated high-voltage power MOSFET
• Auto-restart protection for short-circuit and open-loop faults
• Frequency jittering for reduced EMI emissions
• Cycle-by-cycle current limit
• Line undervoltage lockout with hysteresis
• Overvoltage protection with optional external Zener diode

Advantages

• High efficiency conversion
• Low standby power consumption
• Wide input voltage range allows for versatile applications
• Compact TO-220 package for easy integration
• Built-in protection features enhance system reliability

Disadvantages

• Limited maximum output power of 45W
• Requires external components for complete power supply design
• Not suitable for high-power applications

Working Principles

The TOP255MG is a switching regulator controller that utilizes a flyback topology to convert the input voltage into a regulated output voltage. It operates by controlling the duty cycle of the internal power MOSFET, which allows energy to be stored in the transformer during the switch-on time and transferred to the output during the switch-off time. This process enables efficient power conversion with minimal losses.

Detailed Application Field Plans

The TOP255MG is commonly used in various power management applications, including:

1. Power adapters for consumer electronics
2. LED lighting systems
3. Industrial control systems
4. Telecom and networking equipment
5. Automotive electronics

Detailed and Complete Alternative Models

• TOP256EN: Similar specifications and features, but with higher maximum output power of 65W
• TOP257PN: Lower maximum output power of 30W, suitable for low-power applications
• TOP258PN: Higher maximum output power of 100W, suitable for high-power applications

Note: The above alternative models are from the same TOPSwitch family and offer similar functionality with varying power ratings.

This entry provides an overview of the TOP255MG, including its product category, use, characteristics, package, and specifications. It also covers the detailed pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models. With its high efficiency and wide input voltage range, the TOP255MG is a versatile power management solution for various electronic systems.