Samsung S3F84B8 manual Power Control, Voltage Measurement

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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	+ C16

10uF/50V

Figure 2-5 Voltage Measurement and Surge Protection Circuit

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

2-9

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Contents S3F84B8 Important Notice Revision History Table of Contents List of Figures List of Tables HOW Induction Cooking Works Induction Cooking PrincipleS3F84B8 KEY Features of S3F84B8System Principle HeatingProtection Hardware Implementation System Diagram and PIN AssignmentVSS 220 VAC Power SupplyCooker Synchronization CircuitWaveform of the Synchronization Circuit Voltage Measurement Power ControlCurrent Measurement Circuit Current MeasurementOVER/UNDER Voltage Protection System ProtectionSurge Protection Igbt Over Voltage ProtectionShows the circuit diagram for temperature protection Temperature ProtectionOther Functions PAN DetectionBuzzer and FAN Control KEY and Display Circuit Shows the circuit diagram for key and displaySoftware Implementation State Transition DiagramShows the software diagram Software DiagramInterrupt Service Routine Diagram OPA Internal Resource Arrangement and ConfigurationError Code SchmaticSource Code