LM25069PMM-1/NOPB

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The LM25069PMM-1/NOPB hot swap controller is a single-channel device designed to protect a host system’s power. The device enables hot swapping of power supplies and other power components in the system, ensuring that voltage and current thresholds are maintained in a safe range.

The application field of the LM25069PMM-1/NOPB hot swap controller is mainly used in the power switch of a power supply system. It provides a variety of functions and protections, such as power limiting, inrush current limited, short circuit overcurrent protection, over voltage protection, output voltage sequencing and soft start.

The LM25069PMM-1/NOPB device\'s general operating principle is as follows. First, the input voltage is processed by the AC/DC blocker and error amplifier. The output voltage is monitored by the error amplifier and compared with the reference voltage, and the error signal is then processed by the error amplifier. This error signal is then used to control the gate voltage of the MOSFET, thereby controlling the system\'s power. In addition, two comparators are set up to trigger the soft start, inrush current limiter and power limiting circuits.

The soft start circuit is composed of resistors, capacitors and comparators. When the current is greater than the limit current and the voltage is greater than the limit voltage, the comparator triggers a latch circuit, and the soft start circuit will be turned on when the voltage is greater than the reference voltage. In addition, the power-limiting circuit is composed of resistors, capacitors and comparators, and is triggered by the comparator when the current exceeds the limit current and the voltage is greater than the indicated voltage.

The inrush current limiter circuit of the LM25069PMM-1/NOPB device is composed of resistors, capacitors, MOSFETs and comparators. It has two stages. When the voltage applied to the circuit is less than the reference voltage, the part is enabled, and the MOSFETs are connected in series to limit the current. The temperature protection circuit is composed of a temperature sensor and a comparator, and the device is shut down when the temperature exceeds the set temperature.

The LM25069PMM-1/NOPB hot swap controller is an ideal choice for system designers who need to actively monitor and control their power supplies. The device\'s range of protection features, including power limiting, inrush current limiting and soft start, ensure that dangerous conditions such as overvoltage, overtemperature and short circuit are avoided, protecting both the host system and the components connected to it.

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