SQM48T25010-NDAP

Series:	--
Part Status:	Obsolete

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DC DC Converters: SQM48T25010-NDAP Application Field and Working Principle

DC-DC converters are electrical devices used to convert one DC voltage level or frequency to another. They are used in a variety of applications such as motor control, auto electronics, communications, and power supplies. At the heart of any DC-DC converter is a converter chip, such as the SQM48T25010-NDAP from On Semiconductor. This article examines the application field of the SQM48T25010-NDAP, as well as its working principle.

Application Field

The SQM48T25010-NDAP is a high frequency, full-bridge switching DC-DC converter with integrated high side and low side switches. It uses a synchronous rectification topology, allowing for superior efficiency and a low footprint. This makes it ideal for use in space-constrained systems such as cell phones, tablets, laptops, and other handheld devices. It is rated for input voltages between 0.7V and 4.5V and output power up to 5W. It also supports a wide range of operating frequencies from 500kHz to 2MHz. Other features of the SQM48T25010-NDAP include adjustable output frequency, output under voltage lock-out protection, adjustable soft-start, and an integrated current shunt for monitoring output current. This makes it particularly well suited for high power handheld USB applications, telecom supplies, and automotive devices.

Working Principle

The SQM48T25010-NDAP is a current-mode buck-boost DC-DC converter. This means that it uses a combination of buck and boost switching topologies to achieve a desired output voltage. It uses a single input voltage (Vin) and a control loop to maintain a constant output voltage (Vout).The device consists of four MOSFETs that form two full-bridge switches, which are driven by a pair of PWM (pulse-width modulation) signals. These switches control the flow of current from the input voltage source to the output. The device also contains an integrated current shunt, which allows for monitoring of output current.When a load is connected to the output, the necessary output voltage is set by controlling the PWM signals. The PWM signals cause the switches to alternate between Buck and Boost mode, depending on the voltage level of the output. This allows for stable and efficient operation, even in high-load situations.

Conclusion

The SQM48T25010-NDAP from On Semiconductor is a high-performance, full-bridge switching DC-DC converter with integrated high side and low side switches. It is suitable for applications requiring a wide range of output power, such as cell phones, tablets, and automotive systems. It employs a synchronous rectification topology to achieve superior efficiency, and supports adjustable output frequency, output under voltage lock-out protection, and adjustable soft-start features. The device also includes an integrated current shunt for monitoring output current. In summary, the SQM48T25010-NDAP is an ideal choice for handheld USB applications, telecom supplies, and automotive devices.

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