define(`TITLE', `A fully digital controlled SMPS for up to 100V, 1.5KW')
define(`DATE', `2015-06-17')
define(`CONTENT', `
The whole beast:

<a href="http://a385e5.files.wordpress.com/2015/03/img_2941-e1426606766331.jpg"><img src="http://a385e-5.de/wp-content/uploads/IMG_2941-e1426606766331-300x225.jpg" alt="IMG_2941" width="300" height="225" class="alignnone size-medium wp-image-580" /></a>

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Transformer, 230V to 90V, 1.5KW, 11kg, 12€ on ebay

<a href="http://a385e5.files.wordpress.com/2015/03/img_2944-e1426606813947.jpg"><img src="http://a385e-5.de/wp-content/uploads/IMG_2944-e1426606813947-225x300.jpg" alt="IMG_2944" width="225" height="300" class="alignnone size-medium wp-image-583" /></a>


Transformer Start Relay

<a href="http://a385e5.files.wordpress.com/2015/03/img_2945-e1426606881884.jpg"><img src="http://a385e-5.de/wp-content/uploads/IMG_2945-e1426606881884-225x300.jpg" alt="IMG_2945" width="225" height="300" class="alignnone size-medium wp-image-576" /></a>


Rectifier

<a href="http://a385e5.files.wordpress.com/2015/03/img_2946-e1426606909895.jpg"><img src="http://a385e-5.de/wp-content/uploads/IMG_2946-e1426606909895-225x300.jpg" alt="IMG_2946" width="225" height="300" class="alignnone size-medium wp-image-577" /></a>


Filter capacitors (4x5100uF), with discharging resistor (10kOhm)

<a href="http://a385e5.files.wordpress.com/2015/03/img_2948-e1426606963504.jpg"><img src="http://a385e-5.de/wp-content/uploads/IMG_2948-e1426606963504-300x225.jpg" alt="IMG_2948" width="300" height="225" class="alignnone size-medium wp-image-579" /></a>


Power stage with switch, diode (in one package, 300A, 1000V), inductor (about 140uH) and capacitors (2x2000uF)

<a href="http://a385e5.files.wordpress.com/2015/03/img_2943-e1426607017130.jpg"><img src="http://a385e-5.de/wp-content/uploads/IMG_2943-e1426607017130-225x300.jpg" alt="IMG_2943" width="225" height="300" class="alignnone size-medium wp-image-582" /></a>


Controller, with MSP430, opto-coupler and push-pull-stage for driving the power switch with PWM signal from MCU, voltage-divider and op-amp for feedback voltage, display and some pushbuttons

<a href="http://a385e5.files.wordpress.com/2015/03/img_2942-e1426607103291.jpg"><img src="http://a385e-5.de/wp-content/uploads/IMG_2942-e1426607103291-300x225.jpg" alt="IMG_2942" width="300" height="225" class="alignnone size-medium wp-image-581" /></a>


Load for testing

<a href="http://a385e5.files.wordpress.com/2015/03/img_2947-e1426607276880.jpg"><img src="http://a385e-5.de/wp-content/uploads/IMG_2947-e1426607276880-225x300.jpg" alt="IMG_2947" width="225" height="300" class="alignnone size-medium wp-image-578" /></a>

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