LTC1642CGN#PBF

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PMIC - Hot Swap Controllers

The LTC1642CGN#PBF is a Hot Swap controller integrated circuit (IC) manufactured by Linear Technology, an American semiconductor company. This IC can be used to protect and optimally control circuits, like those found in communication equipment and high-powered systems, which are known to suffer from transient over-voltage, temperature and current conditions. This chip features an on-board programmable current limit and a temperature sense, making it ideal for applications where system power supply or board temperatures need to be precisely regulated.

Application Field

Due to its integrated power and temperature management, the LTC1642CGN#PBF makes an ideal choice for protecting and controlling circuits in high-powered systems such as communications equipment, servers and industrial systems. This chip is also excellent for preventing system failures due to transient over-voltages, which can damage early stages and on-board components.

Working Principle

The LTC1642CGN#PBF is composed of a voltage sense amplifier, a comparator, an over-current comparator, an on-board current limit, a temperature sense and an external heatsink. This comprehensive package eliminates the need for additional components. When the system temperature reaches the pre-set temperature limit, the LTC1642CGN#PBF will shut down power switching and begin to dissipate heat from the heatsink. The voltage sense amplifier senses the differential voltage and activates the comparator when the voltage difference (set by an external resistor/device) is exceeded. The over-current comparator compares the current through the processor to the programmed current limit. If the current limit is exceeded, the LTC1642CGN#PBF will shut down power switching until the current falls back within the programmed limit.

The LTC1642CGN#PBF will start power switching when the temperature is below the pre-set threshold and all voltage and current conditions are within their programmed limits. Once the switch is on, the chip will regulate the temperature by constantly monitoring the temperature sense and adjusting the current limit accordingly. This ensures that the chip remains stable and dissipates heat properly.

Conclusion

The LTC1642CGN#PBF is an ideal choice for Hot Swap applications, where protection and proper temperature regulation are key. This chip can protect circuits from transient over-voltage and current conditions, and adjust the current limit accordingly to a pre-set temperature limit for optimal thermal control.

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