04/29/2022 at 07:03 •
The TDA7498E is a dual BTL class-D audio amplifier with a single power supply designed for home systems and active speaker applications.
It comes in a 36-pin PowerSSO package with exposed pad up (EPU) to facilitate mounting a separate heatsink.
The TPA3116D2 is a stereo efficient, digital amplifier power stage for driving speakers up to 100W / 2Ω in mono. The high efficiency of the TPA3130D2 allows it to do 2 × 15 W without an external heat sink on a single layer PCB. The TPA3118D2 can even run 2 × 30 W / 8Ω without a heat sink on a dual-layer PCB, If even higher power is needed the TPA3116D2 does 2 × 50 W / 4 Ωwith a small heatsink attached to its top side PowerPAD. All three devices share the same footprint enabling a single PCB to be used across different power levels.
The TPA3116D2 advanced oscillator/PLL circuit employs multiple switching frequency options to
avoid AM interferences; this is achieved together with an option of either master or slave option, making it possible to synchronize multiple devices.
The TPA3116D2 is fully protected against faults with short-circuit protection and thermal protection as well as overvoltage, Undervoltage, and DC protection. Faults are reported back to the processor to prevent devices from being damaged during overload conditions.
04/29/2022 at 07:02 •
ESP32 is a series of low-cost, low-power systems on a chip microcontroller with integrated Wi-Fi and dual-mode Bluetooth. The ESP32 series employs either a Tensilica Xtensa LX6 microprocessor in both dual-core and single-core variations, or an Xtensa LX7 dual-core microprocessor, or a single-core RISC-V microprocessor and includes built-in antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management modules. ESP32 is created and developed by Espressif Systems, a Shanghai-based Chinese company, and is manufactured by TSMC using its 40 nm process. It is a successor to the ESP8266 microcontroller.
STM32 is a family of microcontroller ICs based on the 32-bit RISC ARM Cortex-M3 3F, Cortex-M7F, Cortex-M4F, Cortex-M3, Cortex-M0+, and Cortex-M0 cores. STMicroelectronics licenses the ARM Processor IP from ARM Holdings. The ARM core designs have numerous configurable options, and ST chooses the individual configuration to use for each design. ST attaches its own peripherals to the core before converting the design into a silicon die. The following tables summarize the STM32 microcontroller families.
03/31/2022 at 09:49 •
Yesterday, Huaweii held an earnings presentation, which was also the public appearance of Huawei's Chief Financial Officer Ms. Meng Wanzhou again after her return to China.
According to Meng, Huawei achieved global sales revenue of RMB 636.8 billion in 2021, down 28.6% year-on-year, of which the carrier business, enterprise business, and consumer business achieved revenue of RMB 281.5 billion, RMB 102.4 billion, and RMB 243.4 billion, respectively. Among them, especially in the consumer electronics business, the decline was higher. In terms of net profit, the company, on the other hand, earned RMB 113.7 billion in revenue, up 75.9% year-on-year. This was mainly due to the income gained from the sale of some of the company's businesses last year.
Meng further noted, "We have become smaller, but our profitability and cash flow access are increasing, and the company's ability to deal with uncertainty is improving."
And as can be seen from the relevant statistics, thanks to the company's improved profitability in its main business, Huawei's operating cash flow has increased significantly to RMB 59.7 billion in 2021; while the gearing ratio has reduced to a level of 57.8%, and the overall financial structure is strengthening in terms of resilience and elasticity.
In terms of R&D, according to Meng, Huawei will invest RMB 142.7 billion in R&D in 2021, accounting for 22.4% of its annual revenue. Both the number of R&D expenses and the R&D expense ratio are at the company's highest level in the past decade, and the cumulative R&D expenses invested in the past decade exceed RMB 845 billion. According to the information, Huawei is one of the world's largest patent-holding companies. As of December 31, 2021, Huawei held more than 45,000 validly licensed patents (over 110,000) worldwide, with more than 90% of the patents being invention patents, and about 107,000 people engaged in research and development, accounting for about 54.8% of the company's total workforce.