SPA02C-12

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DC-DC converters have been widely used in applications due to their versatility and reliability. The SPA02C-12 is an example of a DC-DC converter which can be used in a variety of different applications. In this article, we will explore the SPA02C-12’s applications and its working principles.

Applications

The SPA02C-12 is specifically designed for DC-DC step-up and step-down applications. Generally speaking, the SPA02C-12 is a DC-DC regulating converter configured to operate as a constant-voltage transformer. This means that it can be used to boost or reduce voltage. For instance, it can accept an input voltage as low as 3.7 V and output a regulated 5 V supply.

The SPA02C-12 is a low-profile, small size, high-output power device, making it ideal for a wide range of applications, including:

• Field-mounted DC power systems
• Mobile devices
• Uninterruptible power supplies
• Battery-powered equipment
• Connected vehicle charge modules
• Automotive applications

Its excellent power efficiency, wide input voltage range, and low output ripple make it a popular choice in these applications.

Working Principle

The SPA02C-12 adopts a synchronous rectification mode, which works thanks to a power converter MOSFET switch, which is made up of four parallelly connected MOSFETs. It is also equipped with a current-mode step-up/step-down converter, which is composed of a primary side control IC, an optocoupler, a transformer, and a secondary side control IC.

The SPA02C-12 operates in two modes: step-up mode and step-down mode. In step-up mode, the MOSFET switch runs in a pulse width modulation (PWM) mode, as two MOSFETs are switched on and off alternately so that a higher voltage is outputted from the step-up circuit. In step-down mode, both MOSFETs are kept on, allowing the converter to reduce the voltage using a buck-mode.

Meanwhile, the current-mode step-up/step-down converter is used as modulation means for controlling the output voltage. This is achieved by changing the duty cycle of the PWM and adjusting the duration of the pulses. This complete cycle is repeated rapidly several times a second. By regulating the duty cycle in this way, the output voltage is accurately maintained.

Conclusion

The SPA02C-12 can be used in a variety of applications as a DC-DC regulating converter, thanks to its synchronous rectification mode, wide input voltage range, and excellent power efficiency. It is also relatively small in size, making it ideal for use in compact, space-constrained applications.

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