Related Manuals for Samsung S3F84B8
Summary of Contents for Samsung S3F84B8
- Page 1 S3F84B8 All-in-One IH Cooker Revision 0.00 May 2010 2010 Samsung Electronics Co., Ltd. All rights reserved.
- Page 2 Samsung reserves the right to make changes in its products or product specifications with the intent to improve function or design at any time and without notice and is not required to update this documentation to reflect such changes.
- Page 3 Revision History Revision No. Effective Date Description Refer to Author(s) 0.00 Mar, 2010 - Initial Draft Wei Ningning Zhang Fan...
-
Page 4: Table Of Contents
OVERVIEW OF IH COOKER (IHC) ...1-1 1.1 Induction Cooking Principle ... 1-1 1.1.1 How Induction Cooking Works ... 1-1 1.2 Key Features of S3F84B8... 1-2 1.3 System Principle ... 1-3 1.3.1 Heating ... 1-3 1.3.2 Protection... 1-3 HARDWARE IMPLEMENTATION...2-4 2.1 System Diagram and pin Assignment... 2-4 2.2 Power Supply ... - Page 5 Figure Number Figure 1-1 How IH Cooker Works ... 1-1 Figure 1-2 Pin Assignment in S3F84B8 ... 1-2 Figure 2-1 Block Diagram of IH Cooker System ... 2-4 Figure 2-2 Power Supply Circuit ... 2-6 Figure 2-3 Power Supply Circuit ... 2-7 Figure 2-4 Waveform of the Synchronization Circuit ...
- Page 6 Table Number Table 2-1 S3F84B8 pin assignment in IH cooker system ... 2-5 Table 3-1 Internal Resource Arrangement and Configuration ... 3-4 Table 4-1 Error Information ... 4-1 List of Tables Title Page Number...
-
Page 7: Overview Of Ih Cooker (Ihc)
(IHC), the cookware participates in the heat generation. This form of heat generation is known as Induction Heating, and it improves the overall thermal efficiency of heating. This document describes an IH cooker (IHC) system implemented with Samsung’s newly developed 8-bit MCU S3F84B8, which is designed for an all-in-one IHC application with amplifier and comparators. -
Page 8: Key Features Of S3F84B8
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 1.2 KEY FEATURES OF S3F84B8 With no more discrete ICs like LM339 (comparator IC) in previous IHC solutions, S3F84B8 successfully integrates four comparators, one OPA, and one IH-PWM to control power directly. After configuration, all the four comparators can cooperate with the IH-PWM automatically, which makes the time-sensitive control possible. -
Page 9: System Principle
LM339. Therefore, only the duty determines the output power. However, in a system with S3F84B8, the PWM directly controls the switch of IGBT and the width of valid output level determines the output power. Therefore, the power is dependent on the system clock. -
Page 10: Hardware Implementation
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 2 HARDWARE IMPLEMENTATION HARDWARE IMPLEMENTATION 2.1 SYSTEM DIAGRAM AND PIN ASSIGNMENT Figure 2-1 shows the block diagram of IH cooker system. Figure 2-1 Block Diagram of IH Cooker System... -
Page 11: Table 2-1 S3F84B8 Pin Assignment In Ih Cooker System
Three out of four comparators are used in this solution: one for synchronization circuit and other two for surge protection and IGBT over-voltage protection. Table 2-1 shows the pin assignment while using S3F84B8 in IH cooker system. Table 2-1 Pin No. -
Page 12: Power Supply
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 2.2 POWER SUPPLY Figure 2-2 shows the circuit diagram for power supply. AC_L 220 VAC 1N4007 AC_N 330uH 1N4007 1N4007 4.7uF/450V The power circuit contains a transformer, an SMPS primary switcher, and a +5V DC regulator. After passing through a half-wave rectifier and an LC filter, the 220V AC power enters the primary side of transformer. -
Page 13: Synchronization Circuit
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 2.3 SYNCHRONIZATION CIRCUIT FUSE1 AC_L 10A/250V 0.1uF/275V BRIDGE D15XB80H18 AC_N COOKER CHOKE IGBT 0.24uF/1200V IGBT_CTRL FGA15N120 4uF/400V CONSTANTAN SYS_I 220K/0.5W 220K/0.5W 470K/0.5W 220K/0.5W 470K/0.5W 220K/0.5W Sy n_N Sy n_P IGBT_V_P IGBT over voltage protection Figure 2-3 Power Supply Circuit 2 HARDWARE IMPLEMENTATION +18V... -
Page 14: Figure 2-4 Waveform Of The Synchronization Circuit
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 2 HARDWARE IMPLEMENTATION IH heating is the result of Eddy current caused by LC resonance. For a general cookware, the oscillation frequency may vary from 20KHz to 30KHz. Since heating consumes energy, the IGBT should be periodically turned on to allow the 220V power to compensate for the energy loss. -
Page 15: Power Control
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 2.4 POWER CONTROL Power is the product of voltage and current (P = V x I). Figure 2-5 and system voltage and current, separately. 2.4.1 VOLTAGE MEASUREMENT Figure 2-5 shows the circuit diagram for voltage measurement and surge protection. Figure 2-5 Resistor divider decreases the voltage level to the proper ADC range. -
Page 16: Current Measurement
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 2.4.2 CURRENT MEASUREMENT SYS_I R4 1K R13 36K In the IH cooker system, the current can go as high as 10A. To avoid excessive energy loss, a constantan is used to change the current signal to voltage signal, which is then amplified by the integrated OPA. Finally, the amplified signal enters the ADC module. -
Page 17: System Protection
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 2.5 SYSTEM PROTECTION 2.5.1 SURGE PROTECTION Figure 2-5 shows the circuit diagram for surge protection. In this figure, Surge_P specifies the negative input of Comparator 1. Also, reference voltage is internally set as 0.55VDD. When surge takes place, that is, V Surge_P > 0.55VDD, the falling edge of comparator 1 can hard-lock the PWM output immediately to prevent the IGBT from being burnt out by over current. -
Page 18: Temperature Protection
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 2.5.4 TEMPERATURE PROTECTION Figure 2-7 shows the circuit diagram for temperature protection. b) IGBT temperature protection RT1 is a thermistor located just beneath the IGBT. CN5 is the connector for the thermistor near the pan. For IGBT temperature protection, there are two kinds of scenarios: ... -
Page 19: Other Functions
In principle, even though the IGBT is turned on, there will not be any oscillation before the pan is put on the panel. In S3F84B8, comparator 0’s output can be set as the clock source of Timer C. After starting 1-cycle PWM output and waiting for about 3 oscillation cycles, if TCCNT>1, Pan status = on;... -
Page 20: Key And Display Circuit
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 2.6.3 KEY AND DISPLAY CIRCUIT Figure 2-9 shows the circuit diagram for key and display. constant constant constant constant KEY1 KEY 1 KEY2 KEY 2 VDD0 SEG1/KS1 SEG1/KS1 SEG2/KS2 SEG2/KS2 SEG14/GRID5 SEG3/KS3 SEG3/KS3 SEG13/GRID6 SEG4/KS4 SEG4/KS4 SEG12/GRID7 SEG5/KS5 SEG5/KS5... -
Page 21: Software Implementation
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 SOFTWARE IMPLEMENTATION 3.1 STATE TRANSITION DIAGRAM Figure 3-1 shows the state transition diagram. This diagram illustrates the operation of IH cooker system. After power is turned on manually, the system periodically checks for pan status and current work condition. This ensures the power is activated only when the pan is on panel, and all temperatures and voltage are in good condition. -
Page 22: Software Diagram
S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 3.2 SOFTWARE DIAGRAM Figure 3-2 shows the software diagram. NOTE: [1] Pan remove detection [1] is done by current sensing. The pan is judged to be removed when the current is lower than a preset threshold. [2] Pan on detection [2] is done by pulse counting. - Page 23 Figure 3-3 shows the flow chart of CMP1/2 interrupt service routine. Due to the cooperation of IH-PWM and comparators integrated in S3F84B8, only a few jobs need to be done in the ISR. CMP1INT ISR (hard lock) For surge protection Clr pending bit Set P0.4(PWM) to input without pull-up R...
-
Page 24: Internal Resource Arrangement And Configuration
Table 3-1 shows the internal resource arrangement for IH cooker system and related registers in S3F84B8. For detail description of all the registers and co-operation ways of comparators and IH PWM, refer to the S3F84B8 user’s manual. Internal Resource Arrangement and Configuration... -
Page 25: Appendix
IGBT over temperature error Pan over temperature error 4.2 SCHMATIC S3F84B8_DEMO_V0.0 _0401.pdf 4.3 SOURCE CODE For more information about the source code, refer to the Source_Code_IHC_S3F84B8_V00. Reference: http://theinductionsite.com/how-induction-works.shtml [2] S3F84B8 UM Table 4-1 Error Information Error code on 7seg-LED 4 APPENDIX...