QSB35048S24

Current - Output (Max):	14.6A
Control Features:	Enable, Active High
Size / Dimension:	2.40" L x 2.28" W x 0.52" H (61.0mm x 57.9mm x 13.2mm)
Package / Case:	9-DIP Module
Mounting Type:	Through Hole
Efficiency:	91.5%
Operating Temperature:	-40°C ~ 100°C
Features:	Remote On/Off, OCP, OTP, OVP, SCP
Applications:	ITE (Commercial)
Voltage - Isolation:	1.5kV
Power (Watts):	350W
Series:	QSB
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	24V
Voltage - Input (Max):	75V
Voltage - Input (Min):	36V
Number of Outputs:	1
Type:	Isolated Module
Part Status:	Active
Packaging:	Box

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Introduction to DC DC Converters

DC DC converters are devices that convert direct current (DC) from one voltage level to another, higher or lower. This type of electrical device is widely used in a variety of applications and is often the most efficient way of converting electrical power from one form to another. DC DC converters are primarily used in applications where the amount of power needed is relatively small and variable voltage is required.

QSB35048S24 Application Field and Working Principle

The QSB35048S24 is a DC DC buck-boost converter designed to deliver up to 10A of continuous output current with minimal component count. It is ideally suited for applications such as low-side switch control, DC-DC power conversion, LED lighting, battery charger and other power applications.The QSB35048S24 utilizes a synchronous buck-boost topology that helps to reduce noise, minimize power loss and increase light load efficiency. The converter has an input voltage range of 4.5V to 40V and an output voltage range of 0.6V to 45V, allowing it to be used in a variety of applications with minimal design effort.The working principle of this converter involves utilizing two full-bridge MOSFETs in a synchronous buck-boost topology. When the input voltage is higher than the output voltage, the converter acts as a buck converter. In this configuration, the input current will increase and the output voltage will drop as the output power increases. When the input voltage is lower than the output voltage, the converter acts as a boost converter. In this configuration, the output voltage will increase and the output current will drop as the output power increases.The QSB35048S24 also features a soft-start function that gradually increases the output voltage from its minimum value to the set value, reducing the inrush current and preventing the output from overloading on initial turn on. The converter offers excellent transient response, providing a fast response and reliable operation in applications where output voltage transients are expected.The converter is also protected from over-temperature, under-voltage lockout, and over-current conditions, ensuring that it will not be damaged in the event of an unexpected fault.

Conclusion

The QSB35048S24 is a highly efficient, low-cost DC DC Buck-Boost converter that is ideally suited for a variety of applications requiring variable voltage and power. The device utilizes a synchronous buck-boost topology to reduce noise, power loss and improve light load efficiency, while still providing excellent transient response and protection from over current, over temperature, and under voltage conditions.

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