(Comprehensive report from Electronic Enthusiasts) Smart glasses, as an important component of wearable devices, are gradually integrating into our daily lives. The power management chip, as one of the core components of smart glasses, directly affects the overall performance of the device. According to a teardown by Wellsenn XR, the BOM cost of Ray-Ban Meta is approximately $164, with a total hardware cost of about $149. In terms of analog chips, Ray-Ban Meta is equipped with about 15 analog chips, with a total value of approximately $12.1, accounting for 7.38% of the total cost.AI smart glasses typically come with various sensors and processors to achieve complex functions such as voice recognition and image processing. However, these high-performance components often require a significant amount of power. In this context, the role of power management chips becomes particularly important. Power management chips can provide a fast and safe charging experience for smart glasses through efficient charging technology. Additionally, some advanced power management chips feature automatic load detection and light load detection capabilities, allowing them to dynamically adjust power distribution based on actual application scenarios to meet the operational needs of the device. Products from Zhiyuan Technology and Lichip Micro are available for AI smart glasses.The Thunderbird V3 smart glasses case uses Zhiyuan Technology’s SW6005. Official data shows that the SW6005 is a highly integrated Type-C mobile power multi-functional chip, primarily designed for mobile power supplies, but its series of features also give it unique advantages in wearable devices like smart glasses.The SW6005 supports A+B+C+L or A+A+B+C four ports, integrating 2.4A high-efficiency switch charging, 2.4A efficient synchronous boost output, power measurement, digital tube/LED display, and corresponding control management logic. This means it can charge smart glasses quickly and efficiently while ensuring long-term stable power supply.Moreover, the SW6005 adopts a QFN-32 (4x4mm) package, with a highly integrated design that requires only a few peripheral components to form a complete high-performance Type-C mobile power solution. This is particularly important for smart glasses that are space-constrained and pursue a thin design, helping to reduce the space occupied by the circuit board.The product features a built-in 12-bit ADC and Lightning decryption function. In terms of synchronous boost performance, the output current can reach up to 2.4A, with an efficiency of up to 95%, automatic load detection/light load detection, and support for low current mode. Automatic load detection and light load detection, as well as low current mode functions, are particularly useful for low-power devices like smart glasses, as they can dynamically adjust power supply based on actual usage, ensuring device operational stability while optimizing energy utilization efficiency.
Figure: Zhiyuan SW6005Lichip Micro’s linear charging chip ET9562 has already been applied in multiple TWS earphones, and it is understood that this product can also be used in smart glasses.According to official information, the ET9562 is a linear single-cell lithium-ion battery charger with integrated power path management. It adopts a CC/CV (constant current/constant voltage) charging profile to meet the charging needs of lithium-ion batteries. It can accept input voltages of up to 24V and automatically disconnect when the input voltage exceeds the preset OVP threshold (usually 6.0V) to protect the circuit from overvoltage damage. Additionally, the ET9562 supports trickle charging, constant current and constant voltage regulation, charging termination, and status monitoring functions.The ET9562 also features power path management and dynamic power management, safety features, and an I2C control interface.The internal power path management of the ET9562 can balance the input current between the system and the battery, ensuring that the system can continue to be powered even when the battery is low. At the same time, the chip has dynamic power management capabilities, which reduce the charging current when an increase in system load is detected, maintaining the input current or voltage at an optimal state. This is crucial for devices like smart glasses that require long-term stable operation; for example, when smart glasses are running complex AI algorithms or under high load, the ET9562 can automatically adjust the charging current to ensure continuity and stability of the user experience.
Figure: ET9562 Application CircuitTo further enhance safety, the ET9562 provides overcurrent protection mechanisms from input to system and from battery to system, effectively preventing damage to lithium batteries due to excessive current. This is particularly important for smart glasses, which have limited space and are difficult to dissipate heat, as it significantly improves the reliability and durability of the device.When encountering unstable power supply, the ET9562’s UVLO (under-voltage lockout) function will immediately cut off the load path, ensuring the safe operation of the device. Furthermore, through the integrated I2C control interface, users can program key parameters of the ET9562, including but not limited to battery constant voltage, charging current, and trickle charging threshold, which increases the compatibility of smart glasses with different power adapters and enhances usage flexibility.
Statement: This article is a comprehensive report from Electronic Enthusiasts, please indicate the above source when reprinting. For group communication, please add WeChat elecfans999,for submission of interview requests, please send an email to [email protected].
More Hot Articles to Read
-
Thousands of units in mass production! The ZhiHuiJun team releases a new weapon: How Lingxi X2 leverages the domestic supply chain to tap into the trillion-dollar robotics market?
-
Betting on MaPU, igniting Ning Wang’s chip ambitions
-
Behind the DeepSeek all-in-one machine, the rise of domestic computing power chips
-
Domestic cockpit SoC makes its first overseas venture! This local Tier 1 has secured a deal with a European automotive giant
-
Is there a brutal reshuffle under the AI revolution? Over 200,000 layoffs in global tech giants
Click to Follow and Star Us
Don’t miss any updates by marking us as a star!