REM1-0512S

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DC DC Converters

The REM1-0512S DC-DC Converter is a switch-mode power supply designed to convert a wide range of DC input voltage to the same 5 VDC output voltage while providing excellent load regulation, high efficiency, and fast response to changes in load. It has an input range of 4.5 to 14 VDC, and can provide up to 12V output when the input is between 12V and 14V.

The REM1-0512S has two main parts: the primary side and the secondary side. On the primary side, a power inductor, two power FETs, a diode, a filter capacitor, an input capacitor, and several current-sensing resistors are connected to the input voltage to create a full-bridge convertor topology. On the secondary side, another power inductor, two power transistor switches, two output capacitors, and two current-sensing resistors are connected to the output voltage. The combination of both sides together forms the full-bridge DC-DC converter.

The two power FETs on the primary side of the converter are responsible for controlling the frequency of the voltage. A higher frequency produces more output power, while a lower frequency allows for higher efficiency. The REM1-0512S has two control modes: Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM). In PWM mode, the FETs are toggled on and off at a constant frequency, creating an output voltage with variable pulse width; this allows for low noise output and high efficiency. In PFM mode, the frequency of the voltage is varied, allowing for higher output power; however, it produces more noise and is less efficient.

On the secondary side, the two power transistor switches are responsible for controlling the voltage level. The FETs on the primary side can control the voltage to a certain degree, however the transistor switches on the secondary side are responsible for fine-tuning the output voltage. This is done by alternately pulsing the two transistor switches on and off. When one is turned off, the other is then turned on. This alternation creates a square wave whose peak voltage level is equal to the output voltage. This allows the REM1-0512S to accurately control the output voltage, regardless of changes in the input voltage or load current.

The REM1-0512S is a highly efficient, low noise, and accurate DC-DC convertor that can handle up to 12V output when the input is between 12V and 14V. It is suitable for applications such as embedded systems, industrial equipment, telecommunications, and automotive applications.

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