Apple Inc.
Battery Emulator with Controllable Frequency Response

Abstract:

A battery emulator can include an active voltage controlled device (VCD), one or more selectable RC filter banks, and a controller coupled to the active VCD and the one or more selectable RC filter banks. The controller may be configured to sense a load on the battery emulator and control the active VCD so as to implement a low frequency battery transfer function derived from a battery model. The controller may be further configured to control the one or more selectable RC filter banks so as to implement a high frequency battery transfer function derived from the battery model. The controller may further include a gas gauge emulation module configured to interface with a gas gauge interface of a device under test. The controller may further include a communications module configured to interface with a test host.