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IH Rice Cooker (Low-End)
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Overview
Low-end IH rice cookers are a popular category of electric home appliance designed to efficiently heat the cooking vessel to cook and produce tasty rice. In recent years there has been strong demand among both luxury and affordable products for eco-friendly models that boost efficiency through low power consumption. This requires fine-grained control.
The R8C/Lx Series MCUs from Renesas have a timer RC (16-bit timer) function with a PWM2 mode suitable for IH control. They are designed to enable IH control using a simpler circuit configuration. IGBTs are used for IH drive, and TRIACs are used for body heater drive, cover heater drive, and fan motor drive.
System Block Diagram
Recommended Products
| Block | Semiconductor Device | Recommended Product Name | Features, etc. |
|---|---|---|---|
| Control MCU | MCU | 38D2 Group | |
| 38D5 Group | |||
| 78K0R/Lx3 | 16-bit MCU, On-chip LCD Control | ||
| R8C/LxC,LxM,LAxx Group | 16-bit MCU, LCD Control, IH Control | ||
| 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 | Small package, low power consumption | |
| Op-amp | UPC324 | ||
| Heater control | TRIAC | BCR08AM-12A | Up to 80 W/AC 200 V to 220 V |
| BCR1AM-12A | Up to 60 W/AC 100 V to 120 V | ||
| BCR1AM-12A | Up to 120 W/AC 200 V to 220 V | ||
| BCR2PM-12RE | Up to 120 W/AC 100 V to 120 V | ||
| IH | IGBT | RJH1BF6RDPK, RJH1BF7RDPK | TO-3P outline / 1100 V |
| Power, other | Zener diode | HZMxNB Series | High ESD tolerance optimal for use in surge absorption |
| NNCDxxDA Series | |||
| RDxxS Series | 2-terminal face-mount outline | ||
| RKZxxKG | High ESD tolerance optimal for use in surge absorption | ||
| Switching diode | HSM2838C, HSM123 | ||
| HSU119 / HSC119 | |||
| Schottky diode | HRV103B, RKR104BKH | Low IR optimal for use in circuit protection | |
| Sensor | CMOS Op-amp | HA1630xxx Series | Small package, low power consumption |
| Op-amp | UPC324 | ||
| IGBT Gate Driver | Photocoupler (IGBT Drive) | PS9306 (6p-SDIP) PS9506 (8p-DIP) | High isolation voltage (5 kV r.m.s.), 0.6 A output High CMR (CMR=25 kV) |
| TRIAC Control | Photocoupler (Standard) | PS25xx Series PS27xx Series PS28xx Series | High isolation voltage (5 kV r.m.s.), 4p-DIP High isolation voltage (3.75 kV r.m.s.), 4p-SOP 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 Group timer X operation (IGBT output mode: IGBT control signal output) | REJ05B0984-0100 |
| 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 Group timer X Operation (IGBT Output Mode: IGBT Control Signal Output) | REJ05B1040-0100 |
| 38D5 LCD drive control circuit (external dividing resister usage) | REJ05B0926-0200 |
| 38D5 LCD drive control circuit (voltage multiplier usage) | REJ05B0927-0200 |
| LCD drive control circuit (external dividing resistor usage) | REJ05B0996-0100 |
| Power MOS FET application note | REJ05G0001-0200 |
| R8C/38C Group Timer RC (PWM2 Mode) | R01AN0081EJ0100 |
| 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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