MAX14900EAGM+T

MAX14900EAGM+T is a high side current-limit load switch. It offers a current-limiting switch with simple external circuitry that quickly and accurately limits the current in the event of an overload. The MAX14900EAGM+T device consists of high-side MOSFET switch and an associated current-sense circuit with a voltage output proportional to the output current. The integrated thermal protection provides over-temperature protection when the device is switched on. The MAX14900EAGM+T is ideal for applications such as driving LED strings, motor control, and portable applications.

Application Field of MAX14900EAGM+T

MAX14900EAGM+T is suitable for various applications such as automotive, automotive auxiliary power systems, charger power systems, and power supplies in consumer electronics. Its internally limited current-sense output, fast turn-off time of less than 10μs, and USB charging support make it ideal for automotive and consumer applications.

In automotive auxiliary power systems, the MAX14900EAGM+T switches can be used to control the current in batteries and charging systems. When the system is switched on, the switch provides a fast response, thus reducing power-on time. The switch also provides an adjustable current limit for safety, which helps to protect against excessive loading.

In consumer electronics, the MAX14900EAGM+T switch provides an adjustable current limit for safety, and can be used to control the current in power supplies for consumer electronics such as smartphones and laptops. The switch can also be used in USB charging applications and is compatible with the USB Battery Charging specification.

Working Principle of MAX14900EAGM+T

The MAX14900EAGM+T load switch contains an n-channel MOSFET, a current-sense circuit, a thermal protection circuit, and a logic control circuit. The n-channel MOSFET is used to provide the load switching functionality. The current-sense circuit measures the output current and provides a voltage output that is proportional to the output current. The voltage output is compared to a logic reference voltage to provide current-limiting protection when the output current exceeds an adjustable threshold.

The thermal protection circuit provides over-temperature protection when the device is switched on. When the temperature exceeds the programmed threshold, the device automatically shuts off the output to prevent component damage due to overheating. The logic control circuit is used to enable the device and adjust the current limit. The logic control circuit enables the device when the input is high, and disables the device when the input is low.

In summary, MAX14900EAGM+T is a high side current-limit load switch with an integrated thermal protection circuit. It can be used in various source and battery applications in automotive, consumer electronic, and charger power systems. The adjustable current limit and fast turn-off time make this device an ideal choice for these applications.