Products in this family are component-level control devices used to construct equipment that converts AC utility power to a DC form, typically at a much reduced voltage. Devices which incorporate the primary switching element for the system and those which do not are both included. Due to the high ratio of input to output voltages and need for isolation commonly encountered in such systems, they are often used in conjunction with an external transformer. While use of custom transformers for this purpose is common practice, a variety of stock products intended for such use are available, under the heading of Switching Converter, SMPS Transformers.
Current Limiting, Open Loop, Over Temperature, Short Circuit
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-40°C ~ 150°C (TJ)
8-SOIC (0.154", 3.90mm Width), 7 Leads
SO-8C
Surface Mount
About AC DC Converters, Offline Switchers
What are AC DC Converters, Offline Switchers?
AC DC Converters, Offline Switchers
AC DC Converters, often referred to as Offline Switchers, are essential components in power management integrated circuits (PMICs) that convert alternating current (AC) from the mains supply into direct current (DC) suitable for electronic devices. These converters are called "offline" because they operate directly from the AC mains without requiring an intermediate DC power source. The basic operating principle involves rectifying the AC input into DC, followed by filtering and regulating the output to provide a stable DC voltage. This process is achieved through a combination of rectifiers, transformers, and switching elements, ensuring efficient power conversion with minimal energy loss.
Types of AC DC Converters, Offline Switchers
Flyback Converters
Flyback converters are widely used in low to medium power applications due to their simplicity and cost-effectiveness. They utilize a transformer to store energy during the "on" phase and release it during the "off" phase, providing electrical isolation between input and output. This makes them ideal for applications requiring multiple output voltages.
Forward Converters
Forward converters are suitable for medium to high power applications. They use a transformer to transfer energy directly from input to output during the "on" phase, with an additional inductor to smooth the output current. This design offers higher efficiency and better performance in terms of output voltage regulation.
Push-Pull Converters
Push-pull converters are used in higher power applications, offering a balanced approach to energy conversion. They employ two transistors that alternately "push" and "pull" the current through a transformer, providing high efficiency and reduced electromagnetic interference (EMI).
Half-Bridge and Full-Bridge Converters
These converters are used in high power applications, utilizing two or four switches to drive the transformer. They offer excellent efficiency and power handling capabilities, making them suitable for industrial and high-performance applications.
How to choose AC DC Converters, Offline Switchers?
When selecting an AC DC Converter, Offline Switcher, consider the following key parameters:
Power Rating: Ensure the converter can handle the required power level for your application.
Efficiency: Look for converters with high efficiency to minimize energy loss and heat generation.
Output Voltage and Current: Verify that the converter provides the necessary output voltage and current for your device.
Isolation Requirements: Determine if electrical isolation between input and output is necessary for safety and performance.
Form Factor: Consider the size and shape of the converter to ensure it fits within your design constraints.
Evaluate product quality and reliability by reviewing supplier certifications, customer reviews, and warranty terms. Consider environmental factors such as temperature range, humidity, and potential exposure to dust or moisture. Ensure proper installation by following manufacturer guidelines and considering ventilation and cooling requirements.
Applications of AC DC Converters, Offline Switchers
Consumer Electronics
In consumer electronics, AC DC converters are used to power devices such as televisions, laptops, and smartphones. They ensure efficient power conversion and stable voltage supply, enhancing device performance and longevity.
Industrial Automation
In industrial automation, these converters are critical for powering control systems, sensors, and actuators. They provide reliable power conversion in harsh environments, ensuring uninterrupted operation of automated processes.
Telecommunications
Telecommunications infrastructure relies on AC DC converters to power network equipment, including routers, switches, and base stations. They offer high efficiency and reliability, crucial for maintaining network uptime and performance.
Renewable Energy Systems
In renewable energy systems, such as solar and wind power installations, AC DC converters are used to convert generated AC power into DC for storage or direct use. They play a vital role in maximizing energy efficiency and system reliability.
Medical Devices
Medical devices, including imaging equipment and patient monitoring systems, require precise and stable power supply. AC DC converters ensure safe and reliable power conversion, critical for maintaining device accuracy and patient safety.
