TB5D2HD

TB5D2HD Application Field and Working Principle

TB5D2HD is a wide range, high-performance and 5KV half-duplex optical isolation switching regulator that is often used in the industrial level. This helpful device has many applications and is used in the fields of closed loop current limiting, thermally controlled cooling and other industrial situations, which require a tight regulation or current limiting circuit. The product offers an overall efficiency of up to 95% and it establishes a constant current/constant voltage status as long as the input voltage and load current are adjustable.

Working Principle

The TB5D2HD switching regulator adopts an active-clamp forward topology. The low side LEFT is controlled and changes the duty cycle of voltage switch tube. Then the buck chopper output by the VC and CR rectifier, to complete the output of switch power supply. The other end of the VC is connected to the constant current feedback circuit (CCFB) to realize the constant current control and the whole process is regulated by a closed loop feedback. The power switch is also equipped with an over-current protection (SOT), short circuit protection (SCT and OVLO), and temperature protection circuits, to ensure the long-term stable and safe operation of the device.

Application Fields

The TB5D2HD switching regulator has many application fields, including the medical field as a medical DC-DC power supply, in servo control and robotic systems as power transmission and energy saving,in Industrial field as the closed-loop current limiting and thermally controlled cooling, and in automotive, military, aerospace and other fields.

In the medical field, the TB5D2HD can be connected to different kinds of medical machines and operating system for various functions. The equipped output is more precise and reliable and the overload capability is higher. The accuracy of the voltage regulation capacity is between 0.1 and 0.5V. Its duty cycle range is also wider to support wider input voltage range. This makes it suitable for different medical treatments and surgical operations.

In the servo control and robotic systems, the TB5D2HD can be used as power transmission and energy saving application, since its long life rate and high efficiency make it an ideal choice. The switch has a wide operating temperature range and it can work in any condition as long as the input voltage and load are adjustable. The active-clamp forward topology of this switch makes it ideal for servo control systems, since it has high power factor and it supports higher load current capability.

The TB5D2HD switching regulator’s multiple applications in the industrial sector make it an ideal choice for closed-loop current limiting and thermally controlled cooling. Its special low-side LEFT regulated duty cycle can effectively remove inrush current and PFC performance is much better than an ordinary PFC converter. Furthermore, its EMC interference level is very low and its overload capability is up to 200%. All these features make the device ideal for current limiting and cooling purposes in industrial applications.

Besides the medical, servo control and industrial applications, the TB5D2HD is also widely used in the automotive, military and aerospace sectors. Its over-current protection and temperature protection ensure long-term stable and safe operation of the device, making it the preferred choice for such applications. It is also compliant with international safety certifications such as CE, FCC, EMC, etc., and its low-cost manufacturing process makes it the most affordable principle in the market.

Conclusion

To conclude, TB5D2HD switching regulator is a wide range, high-performance and 5KV half-duplex optical isolation switching regulator with an overall efficiency of up to 95%. The device is used in a variety of applications, from medical to aerospace, and its closed-loop current limiting and thermally controlled cooling features make it an ideal choice for industrial level tasks. In addition, the device boasts of high power factor and overload capability of up to 200%, and is compliant with international safety certifications for safe operation.