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The MAX5978 hot-swap controller provides complete protection for systems with a supply voltage from 0 to 16V. The device includes four programmable LED outputs.
The IC provides two programmable levels of overcurrent circuit-breaker protection: a fast-trip threshold for a fast turn-off, and a lower slow-trip threshold for a delayed turn-off. The maximum overcurrent circuit-breaker threshold range is set with a trilevel logic input (IRNG), or by programming through the I²C interface.
The IC is an advanced hot-swap controller that monitors voltage and current with an internal 10-bit ADC, which is continuously multiplexed to convert the output voltage and current at 10ksps. Each 10-bit sample is stored in an internal circular buffer so that 50 past samples of each signal can be read back through the I²C interface at any time or after a fault condition.
The device includes five user-programmable digital comparators to implement overcurrent warning and two levels of overvoltage/undervoltage detection. When measured values violate the programmable limits, an external active-low ALERT output is asserted. In addition to the active-low ALERT signal, the IC can be programmed to deassert the power-good signal and/or turn off the external MOSFET.
The IC features four I/Os that can be independently configured as general-purpose input/outputs (GPIOs) or as open-drain LED drivers with programmable blinking. These four I/Os can be configured for any mix of LED driver or GPIO function.
The device is available in a 32-pin thin QFN-EP package and operates over the -40°C to +85°C extended temperature range.
The IC provides two programmable levels of overcurrent circuit-breaker protection: a fast-trip threshold for a fast turn-off, and a lower slow-trip threshold for a delayed turn-off. The maximum overcurrent circuit-breaker threshold range is set with a trilevel logic input (IRNG), or by programming through the I²C interface.
The IC is an advanced hot-swap controller that monitors voltage and current with an internal 10-bit ADC, which is continuously multiplexed to convert the output voltage and current at 10ksps. Each 10-bit sample is stored in an internal circular buffer so that 50 past samples of each signal can be read back through the I²C interface at any time or after a fault condition.
The device includes five user-programmable digital comparators to implement overcurrent warning and two levels of overvoltage/undervoltage detection. When measured values violate the programmable limits, an external active-low ALERT output is asserted. In addition to the active-low ALERT signal, the IC can be programmed to deassert the power-good signal and/or turn off the external MOSFET.
The IC features four I/Os that can be independently configured as general-purpose input/outputs (GPIOs) or as open-drain LED drivers with programmable blinking. These four I/Os can be configured for any mix of LED driver or GPIO function.
The device is available in a 32-pin thin QFN-EP package and operates over the -40°C to +85°C extended temperature range.
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