MAX8685DETA+

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Power management integrated circuits (PMICs) are important components in modern electronic systems. PMICs are used to control, monitor, and provide power for various components in electronic systems. They are subject to various standards and capable of providing different voltage and current levels. The MAX8685DETA+ power management IC from Maxim Integrated is one such device designed to provide efficient power regulation and protection in space-constrained applications.

The MAX8685DETA+ is a highly integrated PMIC specifically designed for battery-powered devices. The integrated diagnostics, protections, and thermal management features of this device make it well suited for battery-powered systems. The device integrates a DC-DC buck converter, a battery charger, a linear charger, an eFuse circuit, an I2C interface, and a USB power switch in a TiN-coated 5 mm x 5 mm package.

The MAX8685DETA+ is ideal for space-constrained applications such as mobile phone chargers, portable media players, and notebook computers. The device can deliver up to 2A of continuous output current with the buck converter and can simultaneous charge the system battery and USB device. The eFuse circuit provides additional protection against over-current and over-voltage conditions. This device also integrates diagnostic and thermal management functions, enabling system designers to monitor voltage, current, and temperature levels in real-time.

The MAX8685DETA+ is a highly flexible device with a wide input voltage range of 4.4V to 20V. This device offers various features for optimization of power consumption compared to traditional PMICs. It includes a timer-based sleep/wake logic, low-quiescent current synchronous boost converter, fast charge current programming with nV accuracy, adjustable voltage regulation loop, low RDS(ON)-PWM switch, voltage and current monitor, and thermal management with NTC sensing circuit. The device can also detect short circuits and overvoltages on the input, the battery, and the output, and can automatically cut the load current to protect the system.

The working principle of the MAX8685DETA+ can be summarised as follows. When a battery is connected to the device, the linear charger will attempt to charge the battery to the programmed voltage level. If the input voltage is high enough and is within the device’s range, then the DC-DC buck converter will be enabled and the device will output a regulated voltage. If the input voltage is too low or out of range, then the buck converter will automatically switch over to the linear charger. The device also monitors the battery voltage, current, and temperature levels. When the temperature exceeds the programmed threshold level, the device will automatically switch to the low-quiescent current boost converter and reduce the load power.

The MAX8685DETA+ PMIC from Maxim Integrated provides efficient power control and protection for battery-powered devices. The device’s integrated features and wide input voltage range make it ideal for space-constrained applications. The device is capable of optimizing power consumption compared to traditional PMICs and can detect over-current and over-voltage conditions to protect the system.

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