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Electric Rice Cooker
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Overview
In recent years, the number of high-end, multifunctional IH rice cooker is increasing. Yet, the conventional electric rice cookers using electric heater remains popular for its affordable price. Electric rice cookers use microcontrollers to set the time for cooking rice. In addition, some electric rice cookers have multiple sensors to control heat and timing depending on the user’s preference of the softness of rice, how well the rice is milled, and keep the rice warm after it is cooked.
Renesas offers the 78K0/Lx3 and the R8C/Lx Series microcontrollers with an A/D converter for sensor input and an LCD driver which are ideal for electric rice cookers.
System Block Diagram
Recommended Products
| Block | Semiconductor Device | Recommended Product Name | Features, etc. |
|---|---|---|---|
| Control MCU | MCU | 38D2 Group | On-chip LCD controller |
| 38D5 Group | |||
| 78K0/Lx3 | On-chip LCD controller | ||
| R8C/LxC,LxM,LAxx Group | |||
| EEPROM | R1EX24xxx Series | I2C bus interface *1 | |
| R1EX25xxx Series | SPI bus interface *2 | ||
| Audio playback MCU | MCU | R8C Family | |
| MCU peripheral | Reset IC | RNA519xx Series | Variable detection voltage |
| CMOS op-amp | HA1630xxx Series | Low power consumption | |
| Heater control | TRIAC | BCR1AM-12A | Up to 60 W/AC 100 V to 120 V |
| BCR2PM-12RE | Up to 120 W/AC 100 V to 120 V | ||
| BCR08AM-12A | Up to 80 W/AC 200 V to 220 V | ||
| Sensor | CMOS op-amp | HA1630xxx Series | Small package, low power consumption |
| Power supply | Zener diode | HZLxxZ4 Series, RKZxxKG,KK Series |
2-terminal face-mount outline High ESD, Low capacitance Series |
| HZMxNB Series | 3-terminal (1 device included) face-mount outline | ||
| Switching diode | HSC/HSD119/HSU119 | 2-terminal face-mount outline | |
| HSM/HSB2836 Series | 3-terminal (2 devices included) face-mount outline | ||
| Schottky diode | HRC0103C/RER0202 Series | 3-terminal face-mount outline (low VF, low leak current) | |
| HRV103B,RKR104BRH | low IR, low VF type | ||
| RKR0505BKH | 3-terminal face-mount outline (low VF) | ||
| TRIAC control | Photocoupler (IGBT drive) |
PS25xx Series | High isolation voltage (5 kV r.m.s.), 4p-DIP |
| PS27xx Series | High isolation voltage (3.75 kV r.m.s.), 4p-SOP | ||
| PS28xx Series | High isolation voltage (2.5 kV r.m.s.), 4p-SSOP |
*1 I2C: Inter-Integrated Circuit
*2 SPI: Serial Peripheral Interface
Related application notes/Sample Code
| Name | Document No. |
|---|---|
| 38D2 LCD drive control circuit (external dividing resistor usage) | REJ05B0996-0100 |
| 38D2 LCD drive control circuit (internal dividing resistor usage example 1) | REJ05B0994-0100 |
| 38D2 LCD drive control circuit (internal dividing resistor usage example 2) | REJ05B0995-0100 |
| 38D5 LCD drive control circuit (external dividing resistor usage) | REJ05B0926-0200 |
| 38D5 LCD drive control circuit (voltage multiplier usage) | REJ05B0927-0200 |
| Power MOS FET application note | REJ05G0001-0200 |
| R2A20112 application note * | - |
| R2A20114 application note * | - |
| R2A20117 application note * | - |
| R2A20118A application note * | - |
| R2A20121 application note * | - |
| R2A20132 application note * | - |
*：Please contact your sales representative or contact us directly.
Related Boards
| Name | Part No. |
|---|---|
| R2A20111 evaluation board * | - |
| R2A20112 evaluation board * | - |
| R2A20114 Series evaluation board * | - |
| R2A20115 evaluation board * | - |
| R2A20117 evaluation board * | - |
| R2A20118A evaluation board * | - |
| R2A20121 evaluation board * | - |
| R2A20132 evaluation board * | - |
*：Please contact your sales representative or contact us directly.
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