DS1705EUA

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PMIC - Supervisors are often used to provide over-current or over-voltage protection, reset and other functions in power systems. DS1705EUA is one of them. DS1705EUA is specially designed to provide a combination of voltage monitoring, power on reset, current monitoring and manual reset in Power Management Integrated Circuits (PMICs). The following content introduces the application field and working principle of DS1705EUA.

One of the applications of DS1705EUA is to provide over-current and over-voltage protection. This function is mainly realized by the current monitoring amplifier, voltage monitoring comparator and protection diode. The amplifier monitors the instantaneous current output from the power supply, and immediately decides whether to maintain operation or initiate reset as soon as the current output exceeds the threshold. The comparator monitors the voltage output from the power supply, and its output will also be transferred to the trigger circuit. When the voltage output exceeds the threshold, the output of the trigger circuit will be reset or the other predetermined action will be triggered. The protection diode will be activated to prevent the circuit from entering the over temperature state by limiting the voltage output.

DS1705EUA is also Professional to provide power on reset and manual reset in PMICs. Its POR circuit is mainly composed of resistor R1 and capacitor C2. When the power is turned on, the capacitor will be charged quickly at first, and then slowly charged again, when it is full, that is, when the voltage output exceeds the threshold voltage, the reset output switch is enabled and a reset signal is sent to the power circuit. This will ensure the system runs normally after power up. The manual reset is mainly realized by manual resetting the input VR, and an external MOS transistor (Q1) is used to control the reset signal output.

In addition to these application fields, DS1705EUA can also provide a variety of automatic circuitry shutdown and protections when power off, such as bidirectional overvoltage protection, sequential destructive turn-off and so on. It is embedded with many logic and control circuits to ensure the safety of the power system in abnormal conditions, such as overvoltage, overcurrent, etc.

In summary, DS1705EUA provides over-current and over-voltage protection, power on reset, and manual reset functions in PMICs, and it can also provide the power circuit with a variety of automatic shutdown protection functions and ensure the safety of the circuit in various working conditions.

The specific data is subject to PDF, and the above content is for reference