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TOP268EG

Name: TOP268EG
Rating: 4.7 (12 reviews)

IC OFFLINE SWITCH FLYBACK 7ESIP

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製造商。部分 #TOP268EG
包 eSIP-7C
資料表 TOP268EG DataSheet
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規格

Package	Tube
Series	TOPSwitch®-JX
ProductStatus	Active
OutputIsolation	Isolated
InternalSwitch(s)	Yes
Voltage-Breakdown	725V
Topology	Flyback
DutyCycle	78%
Frequency-Switching	66kHz, 132kHz
Power(Watts)	148 W
FaultProtection	Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
ControlFeatures	Frequency Control
OperatingTemperature	-40°C ~ 150°C (TJ)
Package/Case	7-SSIP, 6 Leads, Exposed Pad, Formed Leads
SupplierDevicePackage	eSIP-7C

概述

Description

The TOP268EG is a high-voltage integrated circuit designed for offline switch-mode power supplies (SMPS). It combines a high-voltage power MOSFET, a PWM controller, and various protection features in a single package, making it ideal for applications such as LED drivers, battery chargers, and low-power adapters.
Key features include a wide input voltage range, low startup current, and built-in protection mechanisms such as overvoltage, overcurrent, and thermal shutdown. The device operates in a quasi-resonant mode, improving efficiency by reducing switching losses. It also supports primary-side regulation, eliminating the need for an opto-isolator in certain designs.
The TOP268EG is available in a compact package, facilitating easy integration into space-constrained designs. Its versatility and efficiency make it suitable for various low to medium power applications, enhancing overall system performance while simplifying design complexity.

Features

The TOP268EG is a high-voltage integrated circuit primarily used in off-line switching power supplies. Key features include:
1. Integrated MOSFET: It includes a high-voltage power MOSFET, which reduces component count and enhances reliability.
2. Current Mode Control: This feature allows for improved regulation and better transient response.
3. Built-in Functions: It offers built-in features such as over-voltage protection (OVP), over-current protection (OCP), and thermal shutdown to ensure safe operation.
4. Wide Input Voltage Range: It supports a broad input voltage range, making it suitable for various applications.
5. Low Start-Up Current: The IC has a low start-up current, ensuring efficient operation during startup.
6. Adjustable Output Voltage: It allows flexibility in setting the desired output voltage.
7. Compact Package: Available in a small package, it is ideal for space-constrained applications.
These features make the TOP268EG suitable for use in power adapters, LED drivers, and other power supply designs.

Package

The TOP268EG is packaged in an 8-pin DIP (Dual In-line Package) format. This configuration allows for easy integration into circuits and is suitable for through-hole mounting.

Pinout

The TOP268EG is a high-voltage, integrated switching regulator designed for use in off-line power supply applications. It features a total of 8 pins.
Here's a brief breakdown of the pin functions:
1. DRAIN (D) - Output for the switching transistor.
2. SOURCE (S) - Connects to the ground or negative voltage.
3. GATE (G) - Gate control for the internal MOSFET.
4. COMP (C) - Compensation pin for feedback loop stability.
5. RAMP (R) - Used for current sense and control.
6. VDD (V) - Power supply pin for the IC.
7. GND (G) - Ground reference.
8. FB (F) - Feedback pin for voltage regulation.
The TOP268EG is commonly used in applications such as power adapters, battery chargers, and LED drivers due to its efficiency and compact design.

Manufacturer

The TOP268EG is manufactured by Power Integrations, Inc., a company specializing in high-performance analog and mixed-signal integrated circuits. Founded in 1988 and headquartered in San Jose, California, Power Integrations focuses on providing energy-efficient solutions for power conversion, particularly in the areas of switch-mode power supplies and LED lighting. The company's products are widely used in consumer electronics, industrial equipment, and telecommunications. Power Integrations is known for its innovative technologies that enhance energy efficiency and reduce the environmental impact of electronic devices.

Application

The TOP268EG is primarily used in power supply applications, particularly in switch-mode power supplies (SMPS) for tasks like auxiliary power generation. Its features make it suitable for LED drivers, adapters, and industrial equipment. It provides high efficiency, low standby power consumption, and is ideal for designs requiring low-cost, compact solutions. The device is also applicable in home appliances, telecom equipment, and battery chargers.

Equivalent

The TOP268EG chip is a high-voltage, integrated PWM controller for switch-mode power supplies. Equivalent products include the TOP264, TOP265, TOP266, TOP267, and TOP269 from the same family. Other alternatives may include similar devices from competitors, such as the LM5020 or UC3843, depending on specific application requirements. Always check the datasheets for exact specifications and compatibility.