Description

This reference design addresses the design challenges of providing power to the two actuators in a variable displacement A/C compressor. In designing circuits for these two loads: design engineers not only have the challenge of managing different current levels but also have to sense the current accurately to control the actuators and protect the circuits against faults. This reference design is able to surpass all of these challenges using a singular chip. The design guide will walk through all of the key specifications for controlling the variable compressor actuators. Finally it will show the testing of the loads for each of the scenarios discussed and how TI's smart high-side switch portfolio allows robust protection of these automotive loads. The automotive loads tested in this reference design represent a subsection of all of the total loads present on a body control module board. For more information about driving different types of loads see the How To Drive Resistive: Inductive: Capacitive: and Lighting Loads With Smart High Side Switches Application Report.