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PMIC - Hot Swap Controllers

Pulse Width Modulation (PWM) controllers or integrated circuits (ICs) constitute the majority of the power management ICs (PMICs) used in Hot Swap Controllers applications. The LTC4350CGN#TRPBF is a PWM controller with integrated hot swap controllers. It is an interrupt controlled PWM controller that can drive a load up to 15A with a voltage range of 4.5V to 16V.

General Description

The LTC4350CGN#TRPBF is a highly advanced integrated PWM controller IC. It offers Hot Swap-Controllers, Smart Switch Controllers, Fault-Protection Controllers, and Power Path Controllers, amongst other features. The PWM controller has two separate outputs, one for driving a load, and the other for driving an external MOSFET, which helps to reduce power loss and enhances efficiency. It can operate at a temperature range from 0C to 125C and supports an input voltage range of 4.5V to 16V.

Features

The LTC4350CGN#TRPBF provides the user with the following features:

• Over-temperature protection which protects against overdraw or over-temperature conditions.

• Over-voltage protection which protects against short-circuit, over-voltage, and under-voltage conditions.

• Auto-reset feature which returns output voltage to normal operating condition after over-current or over-temperature condition has been cleared.

• Adaptive slew rate which reduces inrush current during startup.

• Robust switch operation which ensures continuous operation during load conditions over a wide range of operating voltages and temperatures.

• Internal reverse current protection which prevents reverse current from flowing into the output, allowing a single power supply to be used for both inputs and outputs.

• Thermal protection which automatically shuts down the output voltage in the event of high temperatures.

Application Field

The LTC4350CGN#TRPBF is well suited for applications in Hot Swap Controllers. It offers protection against over-current and over-voltage conditions. It also helps in reducing inrush current during startup, making it suitable for high power applications like 4K/8K displays, data centers, servers, memory modules, and RAID storage systems. This IC is also used in consumer applications such as gaming, drones, drones and robots to ensure reliable operations.

Working Principle

The LTC4350CGN#TRPBF works by controlling the voltage and current to the load by using a PWM signal. The PWM signal is generated by a microcontroller, which then controls the amount of power applied to the load. This is done by varying the output voltage and current at a fixed frequency, based on the PWM signal. The output voltage and current are monitored and adjusted to maintain a safe operating temperature and to prevent over-current and over-voltage conditions. In addition, the PWM signal also acts as an enable and reset signal for the IC when connected to the enable and reset pins of the IC.

Conclusion

The LTC4350CGN#TRPBF is a powerful PWM controller IC with integrated hot swap controllers. It offers excellent protection against over-current and over-voltage conditions and reduces inrush current during startup. It is suitable for both consumer applications and high power applications, making it a great choice for Hot Swap Controllers.

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