S-8354A33UA-JQST2U

Voltage - Input (Max):	10V
Supplier Device Package:	SOT-89-3
Package / Case:	TO-243AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	50kHz
Current - Output:	300mA (Switch)
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Series:	--
Voltage - Input (Min):	0.9V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to S-8354A33UA-JQST2U Application Field and Working Principle

S-8354A33UA-JQST2U is a DC-DC converter developed for power plant and engineering applications. It is a Polyphase converter with operating frequency of 500kHz within certain load and temperature ranges. S-8354A33UA-JQST2U is suitable for use in heavy load applications requiring redundancy as well as in demand driven system such as mobile and automotive applications.

Application Fields

S-8354A33UA-JQST2U is suitable for use in a wide range of industrial and engineering applications. Some of the application fields include but are not limited to electronics applications such as medical system, lighting, Test and Measurement, as well as Military, Automotive and Industrial Automation applications.

Design Features

S-8354A33UA-JQST2U is designed with high efficiency, low output ripple noise, wide input voltage range and accuracy of the output voltage for different applications. In addition to its features, the converter has an additional safety measure i.e. overvoltage protection and thermal protection that deactivate the converter when the safe working temperature is exceeded. Moreover, it is provided with a voltage feedback control (VFC) system which is adjustable and helps to maintain a pre-specified output voltage.

Fault Detection and Protection

S-8354A33UA-JQST2U provides a fault detection system that is used to prevent any malfunction or faults that could arise in the system. The two main principles of fault detection are undervoltage fault protection (UVFP) and overvoltage fault protection (OVFP). The UVFP trips when the input voltage is below a pre-specified value while the OVFP trips when the input voltage exceeds the specified value.Moreover, S-8354A33UA-JQST2U also provides thermal protection that deactivates the converter when safe working temperature is exceeded. This safety measure prevents any permanent damage to the converter and extends the system life.

Working Principle

The S-8354A33UA-JQST2U works on the principles of pulse width modulation (PWM). PWM is a powerful technique of controlling the speed and power consumption of a load. In S-8354A33UA-JQST2U, the input voltage is compared with the voltage reference by a comparator which then drives the PWM control circuit. The control circuit then controls the switching device to periodically open and close the switch of the converter. The output voltage of the converter is controlled by adjusting the duty cycle of the switching device.The working of S-8354A33UA-JQST2U can be divided into three modes: Diode Rectification, Synchronous Rectification and Resonant Mode. In Diode Rectification mode, the diode rectifies the ac input voltage and provides an output of relatively high ripple. The Synchronous rectification mode reduces the ripple voltage to a lesser extent as compared to Diode Rectification mode. On the other hand, the Resonant Mode provides constant output voltage at low ripple voltage.

Conclusion

In conclusion, S-8354A33UA-JQST2U is ideal for various power plant and engineering applications. Its features such as wide input voltage range, low ripple noise, fault detection and protection make it an ideal choice for various applications such as medical systems, lighting, test and measurement, automotive and industrial automation. It functions on the PWM and provides three types of operation that include Diode Rectification, Synchronous Rectification, and Resonant Mode.

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