LM94CIMT/NOPB

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PMIC - Thermal Management:

Heat is a by-product of most electrical and electronic circuits and can be damaging to both the devices and the environment in which they are used. The power a circuit dissipates is the sum of all its static power and the active power delivered by the circuits it provides to do useful work. In some digital integrated circuits and analog circuits, more than one power source may be used, introducing still more heat. Thus, when designing and operating electronic and electrical circuits, it is important to dissipate the heat produced efficiently to avoid reduced performance or damage. This is where LM94CIMT/NOPB comes in.

LM94CIMT/NOPB

LM94CIMT/NOPB is an advanced low-power thermal controller from Texas Instruments designed to provide intelligent thermal management for consumer and industrial applications with integrated watchdog and overtemperature protection. It provides a cost effective solution for mitigating the risk of thermal overloads in small and medium size systems, reducing unnecessary workload on the processor, and extending the working temperature range compared to conventional resistive-based heat sink control.

Application Field of LM94CIMT/NOPB

LM94CIMT/NOPB is suitable for any environment where sensitive circuitry requires thermal protection. This includes consumer electronics such as notebook computers, cell phones, PDAs, digital cameras, DVD players, and gaming consoles. It can also be used in industrial automation and instrumentation to protect programmable logic controllers, motor controls, pressure vessels, and any other process-critical equipment that needs thermal overload protection.

Working Principle

At the heart of the LM94CIMT/NOPB module is an industry-standard independent thermal diode, which measures the temperature rise of the enclosed assembly and serves as the temperature sensor. The temperature rise is then fed back into the LM94CIMT/NOPB\'s thermal control loop. When the temperature exceeds a predefined set point, the LM94CIMT/NOPB sends a signal to a system or programmable logic controller (PLC) that reduces the output power to the system, thereby maintaining a desirable temperature. As soon as the temperature falls back to the set point, the full output power can be restored. The LM94CIMT/NOPB also has an integrated watchdog which transitions from an idle state when no dangerous temperatures have been detected, to an active state if it detected dangerous temperature, this providing tangible protection from thermal overloads.

The LM94CIMT/NOPB can be combined with a fan, heat sink or any other thermal management device to maintain optimal system performance.When used with a fan, it helps ensure a safe start up experience and adds a margin of safety when the cooling fan is disabled due to a system malfunction.

In summary, the LM94CIMT/NOPB is an advanced low-power thermal controller ideal for use in computers, industrial automation and instrumentation, small motor controls and other systems requiring thermal overload protection. It provides an efficient, cost-effective solution for detecting and controlling temperature rise, protecting expensive systems and equipment from damage and performance reduction due to excessive thermal load.

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