REC3-1205DRW/H4/A/SMD/CTRL

REC3-1205DRW/H4/A/SMD/CTRL is widely used in DC-DC converters. This device is a regulated switching mode DC converter that converts a DC input voltage to another DC output voltage. It is used in a variety of applications such as automotive, telecommunications, electronic packaging, power supplies, and portable power equipment.

The REC3-1205DRW/H4/A/SMD/CTRL is a highly efficient four-switch forward converter, and operates at a fixed frequency of 400kHz, with peak efficiencies of over 90%. It also operates from an ultra-wide input voltage range from 4.75V to 60V, allowing for a wide variety of typical input voltage requirement across different applications.

The fundamental operating principle of the REC3-1205DRW/H4/A/SMD/CTRL is based on a synchronous rectifier forward converter, which basically entails 4 switches. An inductor is connected between the positive terminal of the input voltage source and the node connecting switches S1 and S2, with another inductor connected between the node connecting switches S2 and S4 and the output return.

In the initial start-up phase, S4 is initially turned on and S1 is off while S2 and S3 are both off. This causes current to flow into the inductor connected to switches S1 and S2. As the voltage at the node connecting switches S1 and S2 rises, S1 is turned on, the current flow from the input is split between the two inductors and the voltage across each inductor tends to remain constant. As the current flowing into the inductor connected to switches S2 and S4 continues to rise, S3 is also turned on and the inductor current is reflected back onto the input source. This causes the input voltage to drop until it is the same, or slightly lower, than the output voltage. When this level is reached, the switch is turned off and the current flowing to the output is only supplied from the inductor between S2 and S4.

The current in the inductor drops and S2 is turned on, allowing the current to come back from the output to the input source and thus reducing the output voltage of the converter. The sequence is repeated and the resulting output voltage is regulated by controlling the on/off phase and duty cycle of the switches.

The REC3-1205DRW/H4/A/SMD/CTRL is suitable for applications which require a wide input voltage range such as automotive, telecommunications, electronic packaging, power supplies, and portable power equipment. Some particular applications are:

• DC-DC conversion in automotive applications
• Power supply for band gap references
• Power supply for LED arrays
• Battery chargers
• Portable power equipment

The device is also capable of providing the output current up to almost 9A, making it able to drive a wide variety of loads with different power requirements.

The REC3-1205DRW/H4/A/SMD/CTRL is a highly efficient DC-DC converter with wide input voltage range and peak efficiency capabilities of over 90%. This makes it suitable for a variety of applications such as automotive, telecommunications, power supplies and portable power equipment. In addition, the device can provide a output current up to almost 9A, allowing the converter to drive a wide variety of loads.