Samsung RSE8KPAS Dokumentacja Pobierz pdf (Strona 76)

Circuit Descriptions

12-1) Source Power Circuit

12-2) Oscillator Circuit

12-3) Reset Circuit

Terminal Oscillation Frequency

MAIN MICOM

LOAD MICOM

8.0MHz

4.0MHz

This circuit shows SMPS(Switch Mode Power Supply) which converts AC input voltage (230V, 50Hz) to a high DC voltage

(340V). The input AC source power is converted to DC through a wave rectifier (BD1) and the converted DC power will

generate a constant waveform on the switching transformer using a high speed (100KHz) switching motion of TOP223Y.

The D104 will rectify the generated voltage and transform into a steady 12V DC source power used for the digital display

panel and relays. The regulator (KA7805) finally transforms into 5V DC source power for the control board and sensor’s

circuits.

Caution) Be careful to handle this circuit due to high voltage (AC230V, DC320V)

This is oscillator circuit to generate synchronous clocks used to calculate the time for the microprocessor operation.

Note) If the specification of a resonator changes, micro-processor can not work properly.

The reset circuit is to initialize the values of RAM ＆ other sectors of micro-processor. When the power is engaged initially,

the reset voltage becomes “Low,” and it keeps “High” in the normal operation.

MAIN MICOM LOAD MICOM

Terminal

Normal Operation

Reset Operation

Pin NO. 23

Pin NO. 18

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 89 90

Brak uwag

Samsung RSE8KPAS Dokumentacja Strona 76