STCC02-ED5

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Figure 2: STCC02 Based Application Diagram

Figure 3: Circuit Block Diagram

FUNCTIONAL DESCRIPTION

The STCC02 is a control circuit embedding most of

the analog & power circuitry of a microwaves oven

control module. It interfaces the micro-controller with

the power and process sections of the oven.

The 5V voltage regulator supplies the micro-control-

ler MCU: especially functions such as the timer, the

Analog-Digital Converter ADC, and the low current

outputs. Since all the high-current outputs sink their

current from a different voltage supply, this regula-

tor does not need to be oversized. Its average out-

put current can vary from 5 to 20 mA.

MCU

JP

MAGNETRON RELAY

FAN RELAY

DOOR SWITCH

MAINS

Neutral

Line

BUZZER

/RST

ZVS

SYN

DS

COM

/RST

NMI

5V Regulator

Reset with delay

Zero volts sync.

Door closed detection

Magnetron driver

Fan driver

Buzzer driver

/RST

ZVS

SYN

DS

COM

5V Regulator

Reset with delay

Zero volts sync.

Door closed detection

Magnetron driver

Fan driver

Buzzer driver

Over current

limiter

1.25V

Reference

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