Archive for March, 2010
Lithium Coin-Cell Batteries : Predicting an Application Lifetime
By Rend at 20 March, 2010, 3:19 am
This application note explains about various contributors to battery capacity consumption in a battery backed application, and how to predict battery lifetime in a system. The issues about how to predict the battery lifetime is eplained in detail in Sample Lifetime Calculations section. This application note is divided into 7 section: Why Battery Backup?, IC [...]
Read More >>Reducing PCB Design Costs: From Schematic Capture to PCB Layout
By Rend at 19 March, 2010, 6:52 am
This application note talks about reducing PCB costs from schematic capture to PCB layout. The issues about how to reduce the cost of PCB designs is explained in detail in this note. This application note is divided into 5 section: The basics, Schematic libraries, PCB libraries, The netlist file, and Save time and avoid errors. [...]
Read More >>12V – 4A Power Supply
By Rend at 16 March, 2010, 12:16 am
This is a circuit for 12V – 4A Power Supply. This circuit uses BD705 and L200. To regulate the output voltage this circuit use the 3.3 k resistor and the 1K potentiometer, PT1. Here is the circuit : From the second figure, we can see the current limitation of this circuit. The trimmer PT2 works [...]
Read More >>Understanding Noise in Linear Regulators
By Rend at 12 March, 2010, 4:10 am
This Analog Applications Journal talks about Noise in an LDO, the type of noise, and power supply ripple rejection (PSRR). The issues about noise in analog circuits is explained in detail in this note. The description LDO application is also described in this note. This analog applications journal also talks about the simplified block diagram, [...]
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