TPS51120EVM-001

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TPS51120EVM-001 is a high current, low-side intelligent power switch specially designed to save large amounts of space and power. Its application field is mainly in the off-line AC/DC and DC/DC SMPS. It has a wide range of input voltage options from 7V to 65V. The isolation performance of the switch reaches 750Vac, which meets the insulation requirements of all AC/DC and DC/DC electric circuits. In addition, its built-in double-leg switch can reduce the current ripple coefficient (TRR) and enable it to work reliably.

The core of the chip is mainly based on its working principle. The chip works in DCM/DCM-light mode and combines with the integrated power switch. It can sense the voltage feedback and control the switching at the time of load change. When the low-side MOSFET is used to turn on, the falling edge of the DRAIN inductive current can turn on the DRAIN resistor, and then turn on the MOSFET, which is converted to the high side MOSFET operating in DCM. Through this process, the device can reduce the electromagnetic interference radiation, improve the stability of the device, and reduce the power consumption.

In addition, the function block of the chip provides a complete protection function for the system. It can simultaneously monitor the load current, the output voltage, the output overshoot, the MOSFET overcurrent, the MOSFET short circuit, the MOSFET thermal runaway, and the over temperature of the power supply. Through these functions, the output voltage is clamped within its valid range, and its accuracy can be greatly improved. This can effectively maintain the normal operation of the device.

In summary, as a high current, low-side intelligent power switch specially designed to save large amounts of space and power, TPS51120EVM-001 provides a complete protection function to maintain the stability of its application field in the off-line AC/DC and DC/DC SMPS, and its core is mainly based on its working principle which combines the integrated power switch and DCM/DCM-light mode. Through the application of this device, the power consumption and electromagnetic interference radiation can be greatly reduced.

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