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Audio TEST & MEASUREMENTS

CONCLUSION

As can be seen, building a simple, low-cost Class D amplifier is very easy using the high-voltage
GreenPAK IC. Both designs shown in this article are the simplest versions of the devices that can

be built based on the SLG47105. They are not intended to be a part of high-fidelity equipment but
nevertheless can be used in portable audio devices, intercoms, doorbells, etc. The simple phase-shift
controlled-oscillation amplifier can be modified to a stereo amplifier, or the remaining full-bridge (or
two half-bridges) can be used to drive any high current load such as a DC motor, solenoid, relay, high-
power LED, etc. This is also true for the phase-shift controlled-oscillation amplifier without output
filter.

Three Solutions for
Table 6: LUT settings

Battery Testing in

Manufacturing and

Production
Table 7: ACMP settings

By Andrea Vinci, technical marketing manager at Tektronix

Energy storage system testing is a trending topic today. Commonly referred to as “battery testing,” it
ranges from small portable format batteries to the larger ones used in electric vehicles (EVs) to those
used in backup systems for high energy supply in so-called “stationary applications.” Depending

on the specific context and manufacturing cycle phase of these systems, Tektronix Keithley serves
the market with test solutions, like those aimed to serve the pressing needs of system integrators
Table 8: HV output settings designing automated test systems (ATEs) for EV OEMs. We continue to grow our experience on
various test cases and production quality requirements as technology progresses.

SAFETY, PERFORMANCE, AND SYSTEM MANAGEMENT
The “battery testing” context can be really wide, spanning from the characterization of the smallest-
For More Information possible cell in portable devices to large vehicles batteries operating at 1,000 V or even higher. The

battery system is of paramount importance for electrified mobility. Nowadays, lithium-ion batteries
are among the most commonly used types in EVs due to their high energy and power density. There are
▶ Opening up the next chapter of Class D audio amplifier performance different nomenclatures used for the “batteries” that depend on the market context. In automotive,
for instance, depending on the state of integration in the vehicle, the EV battery as a device under

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