Jim Christensen is a strategic application engineer with Maxim Integrated Products Inc., Sunnyvale, Calif. He holds a BSEE and an MSEE from the University of Texas at El Paso. Email address: jim.christensen@maxim-ic.com Web site: http://www.maxim-ic.com
3 results found for Jim Christensen, displaying items 1 - 3
November 7, 2008[Ideas For Design] Simple Battery Monitor Works With Higher Battery Voltages
Battery-operated equipment often requires a low-voltage monitor to warn the user when the battery voltage is too low or to perform other functions, such as power-source switching or device shutdown. Many specialized ICs are available to satisfy this need, but most target applications that use fairly low-voltage lithium or NiCd batteries. Thus, they’re not directly compatible with applications using lead-acid batteries, which may go as high as 14 V during...
June 26, 2008[Ideas For Design] Adapt DC Voltage To Perform PWM DImming Of High-Brightness LEDs
High-brightness LEDs (HBLEDs) are making inroads into more traditional lighting applications that include a dc distribution system (for example, 24-V MR-16 track lights). HBLEDs are more efficient, and they have a potentially longer lifespan than do halogen or xenon lamps. Because hysteretic controllers are inexpensive, simplify lighting designs, and require no compensation networks, they’re well-suited for driving HBLEDs....
August 5, 2002[Ideas For Design] Speed Control Handles Isolated –48-V Fans
Chips are available to monitor and control ventilation fans. But less common are fan controllers for telecom applications. Such fans must operate in electrically isolated environments with a supply voltage in the 36- to 72-V range. For example, the...
