Archive for the ‘Power Supply’ Category
Simple Hot Swap Controller
The TPS2390 and TPS2391 integrated circuits are hot swap power managers. These devices are optimized for use in nominal -48-V system. These devices are build with supply voltages ranges up to -80 V. These devices also rated to withstand spikes to -100 V. They can be used to enable live insertion of plug-in cards and …[Read More]
HYM1422 Hot Swap Controller
The HYM1422 is an integrated 2.7V to 12V hot swap controller. This device allows a board to be safely inserted and removed from live backplanes. This is achieved using a pass FET with a current control loop that using a sense resistor, we can monitor the input current. The board supply voltage can be ramped …[Read More]
This is Positive Low Voltage Hot Swap Controller circuit with Power Limiter. This circuit gives intelligent control of the power supply voltage to the load during removal and insertion of circuit cards from “hot” power sources or a live system backplane. This circuit uses The LM25069 that gives in-rush current control to limit system voltage …[Read More]
TPS108x Versatile Boost Converter
This is Versatile Boost Converter circuit using TPS108x. The TPS1081 has chosen because it is suitable for application that requires up to 20 V and 100 mA to drive each column of a passive-matrix OLED (PMOLED). the TPS61080 is suitable for application that requires less than 10 V and only tens of milliamps per column …[Read More]
Positive High-Voltage Hot Swap Controller with Power Limiter
This is Positive High-Voltage Hot Swap Controller circuit with Power Limiter. This circuit uses the TPS2491 or TPS2490 because both of them have some advantages. The advantages of the TPS2491 and TPS2490 are positive high voltage, easy-to-use and has 10-pin Hot Swap Power Manager™ devices. 10-pin Hot Swap Power Manager™ devices will ensure the safety …[Read More]
Single Transistor Lead Acid Battery Monitor
We can make a very simple battery monitor using a dual-colour LED and a few additional components. When the red and green LEDs are illuminated, the LED produces orange. The following battery monitor circuit turns on the red LED below 10.5v. The green LED illuminates above 11.6v. The orange LED illuminates between 10.5v and 11.6v. …[Read More]
Two Transistors Lead Acid Battery Monitor
Three separated LEDs is used on this battery monitor circuit. For red LED, it’s turn on from 6v to below 11v and turns off above 11v. For the orange LED, its illuminate between 11v and 13v and turns off above 13v. The green LED illuminates above 13v. This battery indication is suitable for monitoring your …[Read More]
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