This week, we share a case analysis: Title: Skyworth 32E55HE Color LCD TV Malfunction Engineer Name: Zhang Chenhao Device Name: Color LCD TV Device Model: 32E55HE Serial Number: N.A Malfunction Phenomenon: Repeated Restarting Abstract This color LCD TV is used for central monitoring display, summarizing and displaying data information from multiple monitors in real-time. This … Read more
The role of the capacitor in the 3.3V voltage regulator circuit Generally speaking, the input capacitor of a 3.3V voltage regulator chip is for filtering, while the output capacitor is to prevent oscillation and maintain voltage regulation performance. However, this is not an absolute rule; as chip designs improve and processes become more sophisticated, some … Read more
Although power management is crucial for almost all electronic devices, it often does not receive the attention it deserves. Power management systems can enhance product reliability and performance, often supporting many other functionalities. Power Management Integrated Circuits (PMICs) are compact, efficient, and flexible in design, making them particularly important in battery-powered electronic devices such as … Read more
With the development of the automotive industry, the number of electronic control systems in vehicles has grown exponentially. The in-vehicle electronic control system, centered around the ECU, is gradually replacing passive devices and mechanical systems, while also fulfilling most measurement, drive, and control functions. The increase in new in-vehicle electronic control systems in vehicle applications … Read more
For a long time, communication between microcontrollers (MCUs) has been a learning challenge for many electronic engineers. Since different MCUs may use different voltage levels, many beginners are curious about how these MCUs can communicate. Let’s take a look! Generally speaking, communication between MCUs relies on digital signals, where the voltage level of the digital … Read more
Today we analyze a classic microcontroller power supply circuit, the schematic diagram of the circuit is shown below: ▲ Simplified switch circuit Before powering the circuit, the switch “TEST” is open, and the microcontroller is not powered through VCC. At this point, the base of T1 is grounded through R9 (100k), putting it in the … Read more
EMMC Socket Usage: Enter “EMMC” under “Input Chip Marking” to see the following three options: EMMC_AUTO: Speed 8BIT (default), automatically recognized when EMMC. EMMC_AUTO_4BIT: 4BIT, recommended for most chips for stability. EMMC_AUTO_1BIT: 1BIT, can be selected when the above two cannot read; slower speed but may recover data in the chip. Additionally, the chip model … Read more
PMIC Seminar The seminar is a regular activity of the Power and Mixed-Signal Integrated Circuit Laboratory, held once a month, hosted by the heads of various research directions in the lab, aimed at enhancing communication and integration among research groups, sharing cutting-edge research dynamics, and summarizing stage achievements. In the last seminar, Senior Brother Yuan … Read more