VME162PA344SE | MOTOROLA | Load provides current module

Description

VME162PA344SE | MOTOROLA | Load provides current module

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The working principle of this VME162PA344SE  is that when the voltage of two input power sources is the same (with a difference of less than 100 mV), LTC4416 controls two MOSFETs to conduct simultaneously through G1 and G2, so that both inputs provide current to the load simultaneously. When the input power supply voltage is different, the output power supply voltage may be higher than the input power supply voltage of a certain channel. At this time, LTC4416 can prevent the output from flowing current back into the input. This is because the chip constantly monitors the voltage difference between input and output. When the output voltage is 25 mV higher than the input voltage, the chip controls G1 or G2 to immediately turn off the VME162PA344SE  to prevent current backflow. In terms of preventing backflow, other control chips also follow a similar principle.

VME162PA344SE  also has two control terminals E1 and E2, which can actively control the on/off of two power sources using external signals. It can also monitor the input voltage through resistance voltage division to control the conduction of a certain power source. For specific methods, please refer to the chip data manual. This chip is also suitable for applications where the input power supply voltage of one channel is high and the input power supply voltage of one channel is low, such as “VME162PA344SE ” applications. It should be noted that in order for the chip to actively turn off one power supply, the external MOSFET must use a “back-to-back” scheme, as shown in Figure 4.

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