How to test the RF performance of Bluetooth headsets? An nA battery simulator can help you achieve it easily!
2021-11-17
The launch of Apple's first-generation Airpods in September 2016 promoted the transformation of the headset industry and opened the era of wireless headsets. From the original Bluetooth 4.0 and 4.2 to today's Bluetooth 5.0, the Bluetooth version is constantly being updated iteratively, and Bluetooth headsets are also changing accordingly. TWS headset is a new smart wearable product produced by applying TWS technology to the field of Bluetooth headsets. It is mainly composed of a charging box part and a wireless headset part. It has the characteristics of true wireless, intelligent, active noise reduction and diversified interaction methods. . However, due to the small size and small battery capacity of the TWS headset, and the user's pursuit of the headset's connection stability, battery life, sound quality, etc., the Bluetooth headset design stage is to ensure faster transmission speed and more stable connection ability. Under the premise, it is necessary to continuously optimize and reduce power consumption to extend battery life. Moreover, in order to define the performance and quality of the headset, TWS headsets need to undergo a lot of testing during the R&D and production stages. Bluetooth headset RF performance verification is one of the very important content. Due to the very low power consumption of the Bluetooth headset, the power of the headset speaker unit is generally 3mW or 5mW, which also brings new challenges to the test. Users need to select a high-precision Power Supply to power the Bluetooth headset to improve the accuracy of the test results. , To avoid misjudgment. However, the challenge faced by engineers is much more than that. Because Bluetooth headsets are powered by batteries, the voltage of the battery in use does not maintain a constant output, but as the SOC decreases, the output voltage gradually decreases until the power is discharged. Therefore, it is impossible to verify the influence of the battery characteristic curve on the performance of the earphone using a normal DC Power Supply. Manufacturers and Bluetooth headset RF system suppliers need a battery simulator that can simulate battery characteristics and have mA or even uA-level measurement accuracy to complete the RF performance verification APM's SP-3U/6 series of wide-range high-power programmable DC The power supply is just such a product that meets the multiple needs of users. The SP-3U/6U series is a nA-level battery simulator with a measurement accuracy of up to 0.05%+2uA, low ripple, and built-in USB and LAN interfaces. Through a USB hub or switch, the number of channels of the Bluetooth headset RF test system can be easily expanded. IT6402 has built-in battery test and battery simulation functions, which can simulate the characteristic curves of batteries with different capacities. During operation, the battery capacity, SOC, voltage and current parameters are displayed in real time, providing professional solutions for verifying the performance of Bluetooth headsets. For more product information, please visit APM official website enpps.apmtech.cn/ or call +8676922028588 for details!
