UC5603DP

UC5603DP is a signal terminator which belongs to interface technology. It is a product of the semiconductor integrated circuit series developed and manufactured by the American company TI (Texas Instruments). It is mainly composed of an onboard power supply and control chip.UC5603DP\'s application field mainly includes automotive, robotics, industrial, medical and other applications. The device has a wide range of applications covering both analog and digital circuits.

In terms of working principle, the working principle of UC5603DP signal terminator is to use a switching power supply to adjust the input voltage to meet the low voltage requirements of the circuit, and then the power supply regulator chip uses the voltage feedback circuit to control the switching frequency and output voltage. The integrated circuit of UC5603DP can be divided into four parts: the power supply part, the control circuit part, the sensing resistor and the protection circuit part.

The power supply part is composed of a power input filter capacitor and a switching power supply circuit. The power switching of the power supply circuit is controlled by the control circuit part through an oscillator, so that an AC voltage can be generated from the DC voltage provided by the power input filter capacitor, and then rectified and filtered through the rectifying circuit, and finally the required output voltage can be obtained.

The control circuit part is composed of an oscillator, a timing circuit and a voltage feedback circuit. The oscillator is composed of a resistor, a capacitor and a silicon controlled rectifier, which is responsible for generating a control signal for the switching power supply circuit. The timing circuit is composed of a group of resistors, capacitors and transistors, and its main function is to generate an interrupt pulse for the switching power supply circuit. And, the voltage feedback circuit is composed of a voltage detector and a comparator. They are responsible for monitoring the output voltage of the power supply and providing external information to the control circuit.

The sensing resistor is responsible for sensing the resistance of the load, so as to perceive the load changes, so as to maintain the output voltage of the power supply within a certain range, and to ensure the stability of the output voltage. The protection circuit part is composed of two parts, the first part is a temperature sensor. Its task is to detect the temperature change of the circuit board and output a signal to the control circuit, so as to output a feedback signal to the switching power supply circuit according to the temperature change; the second part is an over-current detector, whose task is to detect the working current of the switching power supply, so as to protect the chip from being damaged caused by over current.

In conclusion, UC5603DP is a signal terminator. It is mainly composed of an onboard power supply and control chip. Its application field mainly includes automotive, robotics, industrial, medical and other applications, and its working principle is to use a switching power supply to adjust the input voltage to meet the low voltage requirements of the circuit, and then the power supply regulator chip uses the voltage feedback circuit to control the switching frequency and output voltage.