Samsung S3F84B8 manual Power Control, Voltage Measurement, 220 VAC

S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 2 HARDWARE IMPLEMENTATION

2.4 POWER CONTROL

Power is the product of voltage and current (P = V x I). Figure 2-5and Figure 2-6 show the measurement circuit of system voltage and current, separately.

2.4.1 VOLTAGE MEASUREMENT

Figure 2-5 shows the circuit diagram for voltage measurement and surge protection.

1N4007

AC_L D9

220 VAC

AC_N D10

R17

1N4007 470K/0.5W

surge protection	C15
Surge_P	102/1KV

C18 221

R18	R19
820K/0.5W 820K/0.5W
		SY S_V
R27	R20	+ C16
6K8	29K

10uF/50V

Figure 2-5 Voltage Measurement and Surge Protection Circuit

Resistor divider decreases the voltage level to the proper ADC range.

2-9