Power-line Conducted Emissions: Analysis and Localization
Power-line conducted emissions testing, localization, and mitigation: LISN-based differential/common-mode analysis, AC input filters, ferrites, chokes, and PCB layout tuning.
Power & New Energy Solutions
Power Supply Ripple: Measurement and Suppression Methods
Technical overview of power supply ripple: causes, effects, ripple measurement techniques with oscilloscope, and methods for suppression including filtering and loop design.
Why a Bootstrap Capacitor C1 Is Used in Buck Converters
Explains why a bootstrap capacitor (C1) is used in buck converters: it forms a floating supply to power the high-side gate driver and enable MOSFET switching.
What Is Power Factor? UPS Load Power Factor Guide
Explains power factor fundamentals and how UPS rated load power factor differs from load input power factor, causing inverter derating and reactive current effects.
Key PCB Layout Guidelines for Buck Converters
PCB layout guidelines for DC-DC buck converters: minimize power-loop and SW-node area; place VIN decoupling close; size vias/copper for current/thermal; keep FB/AGND short.
IR21814S Non-Isolated Driver Circuit Design
Analysis of IR21814 MOSFET driver in LLC topology: bootstrap operation, thermal loss at 195-360 kHz, and a push-pull transistor stage added to share drive current.
Buck Converter Using TI TPS5320
Analysis of a 12 V to 1.2 V Buck converter exhibiting persistent Vout jitter and irregular Vsw after power-up; investigates causes such as insufficient output capacitance.
Xiaomi SU7 EV Battery Features Explained
Technical overview of Xiaomi SU7 battery: 101 kWh CATL 'Qilin' CTB pack with 800V fast-charging, plus EV battery chemistries, lifespans, replacement costs and warranties.
Common Communication Interfaces for Digital Power Supplies
Overview of communication interfaces for digital power: RS-232, RS-485, CAN and TCP/IP principles, level translation and typical transceiver circuits.
Types of Solar Cells
Technical overview of solar energy technologies, comparing crystalline, thin-film (CdTe), and emerging perovskite solar cells, and material supply challenges.
Ultrasonic Metal Welding for EV Battery Cables
Analysis of ultrasonic welding solutions for thicker EV charging cables: GMX-20-DP direct-press design, improved tooling, higher clamping force and reduced amplitude.
PMOS Switch Simulation Circuit Analysis
Explains Vout rebound during PMOS turn-off: how load impedance changes cause a voltage rise and mitigation via faster switching or an output filter capacitor.
