Power control.

Classified in Electronics

Written at on English with a size of 40.96 KB.

 

To control by PWM requires 2 factors:

1-crossing detection signal by 0.

2-? determine the time, every time you walk by 0.

to detect the zero crossing can be performed
through an operational amplifier connected
comparator.

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TCA = 785
Pin Symbol Function
1 GND Earth
2 Q2 *Output 2 Inverted
3 Output U QU
4 Q1 * Output 1 Inverted
5 5Synchronizing voltage Vsync (to detect
zero crossing)
6 Inhibitor
7 QZ Z Output
8 8 Vref voltage stabilized (continuous signal for the
integrator)
9 9 ramp resistor R9 (for the integrator)
10 C10 ramp Capacitance (for the integrator)
11 11 V11 Control Voltage (for comparator)
12 12 C12 pulse Extension
13 LLong pulse
14 Q1 Output 1
15 Q2 Output 2
16 l sSupply voltage.
2Q ==

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