Electronic Circuit Design

Power Supply Regulators and MOSFET Transistor

Posted by on May 16, 2015 in Power-Supply-Regulators, Transistor

HELLO THERE ...COULD anybody pls help me with a place to get more information on the following components...cant seem to find it anywhere.

W20NB50 W8NB100 found them in a liteon power supply pack for a database supply. i just don't know what they stand for. ...saw on a web page that it is produced by ST micro electronics. i went there but no show ..can somebody pls help?

post by FP

W20NB50 ST Power MOSFET Transistors TO-247 N-Ch 500 Volt 20 Amp
W8NB100 ST Power MOSFET Transistors TO-247 N-Ch 1000 Volt 8 Amp

You will find equivalents here - NTE Electronics - N-Channel MOSFET Selector

ST’s MOSFETs with a breakdown voltage > 650 V offer low gate charge and low on-resistance down to 0.275 Ω (850 V) in PowerFLAT 8x8 HV packages.

Junction design of a Mosfet

mosfet_junction_structure

"The source-to-body and drain-to-body junctions are the object of much attention because of three major factors: their design affects the current-voltage (I-V) characteristics of the device, lowering output resistance, and also the speed of the device through the loading effect of the junction capacitances, and finally, the component of stand-by power dissipation due to junction leakage."

Updated - July 2013

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uC Board is Buggy on Brown Out

Posted by on May 15, 2015 in uC-Timer-Clocks

I'm working on a project which involves battery Ni-Mh 4x1.2v, 2100mAh], which power-ups the boards. The current consumption is about 150mA. Now what I wish to do is disconect the load when my battery voltage falls down to 4v or so

Because now when my battery reaches this voltage the instrument fails to work, sometimes my program gets corrupted. And battery reaches a critical voltage level like 1-1.2(summation of all 4 batt). what else can I do so prevent this?

Mail from MO

Using LEDs with Battery Power

Posted by on May 06, 2015 in LED-Circuits

What are LEDs ? How can we use them for Long Battery Life

Mail from AD

If LED flashes at 5-10 K Hz at even 50% Duty Cycle. It may save some power and improve life. So it is just an idea, it may not solve the problem. The idea was to improve battery life and give uniform light for annunciators. It may not be good for flashlights.

Light-emitting diode - Wiki

LEDs have many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching.

The LED Museum

The LED (and Laser) Museum. A site devoted to testing & reviews of LEDs & LED flashlights in all common chemistries.

LEDs and OLEDs
Small lights with big potential: light emitting diodes & organic light emitting diodes.

Light Sources in Electronics
Light can be produced and/or controlled electronically in a number of ways. In light emitting diodes (LEDs), light is produced by a solid state process called electroluminescence.

gerald_g_light_emiting_diodes28129

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