LMZ35003EVM-001

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When looking for a reliable source of power, the LMZ35003EVM-001 evaluation board from Texas Instruments (TI) is an ideal choice for applications that require an off-line DC/DC or AC/DC switch mode power supply (SMPS). The application field for the board includes consumer applications such as computer power supplies and industrial applications such as robotics and power conditioning.

The LMZ35003EVM-001 uses TI\'s Constant On-Time (COT) control architecture to provide a wide range of adjustable output voltage and current. This architecture allows for faster load transient response, better AC line regulation, improved end-of-life performance, and enhanced reliability. The board includes a configurable digital controller that helps in setting the output voltage or current precisely and enables comprehensive monitoring of the SMPS status.

The LMZ35003EVM-001 working principle is based on a buck topology. The SMPS uses a high frequency power switch to convert a constant input voltage into an adjustable output voltage that is lower than the input. To achieve this, a feedback loop is used that continuously monitors and adjusts the output voltage. The COT control architecture is a variation of constant frequency, modulation Topology that features switch on-time equalization over a wide range of load currents.

The evaluation board includes two enable pins and two voltage sense pins to provide over-current, over-voltage, and under-voltage protection to protect the SMPS from damage in case of over-current or over-voltage conditions. The board also includes a programming header for setting output voltage precisely with the help of external programming voltage and two switching nodes for simplicity in the evaluation of the switch converter performance.

In addition, the board features an integrated filter inductor that reduces the ripple in the input current, as well as a programmed output voltage sensing circuit that cloaks the output voltage level from the varying load current. Due to the wide range of operating temperature and excellent thermal management, the LMZ35003EVM-001 can be used in a wide variety of applications ranging from embedded to industrial.

To conclude, the LMZ35003EVM-001 evaluation board from TI is an ideal choice for applications that require an off-line DC/DC or AC/DC SMPS. The board features a constant on-time control architecture that provides a wide range of adjustable output voltage and current, as well as excellent thermal management and programmable output voltage sensing. The integrated filter inductor reduces ripple in the input current for enhanced reliability, and the evaluation board includes two switching nodes and two enable pins for over-current and over-voltage protection. This makes it an ideal choice for embedded and industrial applications.

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