Overview

Renesas offers a variety of microcontrollers for air conditioner control to realize a more comfortable living environment. The RX24T Group can control two inverters and has a built-in floating-point unit (FPU) that facilitates vector control, making it suitable for outdoor units. The RL78 Family, the RX130 Series, and the RX230 Series are designed for indoor units. The RL78/L12 Group and the RL78/L13 Group are for use in remote controls. Renesas delivers solutions optimized to customer requirements.

Air Conditioner (High-End)

System Block Diagram (Indoor Unit/Remote Controller)

System Block Diagram

System Block Diagram (Outdoor Unit)

System Block Diagram

Recommended Products
Block Semiconductor Device Recommended Product Name Features, etc.
Remote controller MCU RL78/L12 Group , RL78/L13 Group 16-bit MCU for use in remote control, small package, abundant lineup
Indoor unit MCU RL78 Family 5 V operation, General purpose 16-bit MCU
RX130 Group
RX230 Group
5 V operation, Capacitive Touch key control
Outdoor unit MCU RX24T Group Built-in FPU、2 motor control
Shunt regulator μPC1093, μPC1943/1944 Optimal for output voltage detection of outdoor unit power supply
PFC (IC) R2A20114B Continuous conduction mode interleaving
R2A20112A Critical conduction mode interleaving
Discrete
(inverter)
Photocoupler (IGBT drive) PS93xx Series
(6/8p-SDIP)
PS94xx Series
(16p-SOP)
PS95xx Series
(8p-DIP)
PS99xx Series
(8p-LSDIP)
High isolation voltage (5kV~7.5kVr.m.s.)
0.6~2.5A output
High CMR (CMR≧50kV/μs)
MCU peripheral Op-amp READ2302GSP Full range Input/output , High slew rate
μPC4742, μPC4744 High slew rate
Signal interface in
indoor/outdoor unit
Photocoupler (standard) PS23xx Series
PS27xx Series

PS28xx Series
High isolation voltage (5kVr.m.s.), 4p-LSOP, Ta=115°C
High isolation voltage (3.75kVr.m.s.), 4p-SOP, Ta=110°C
High isolation voltage (2.5kVr.m.s.), 4p-SSOP, Ta=110°C
Photocoupler (high-speed) PS91xx Series
(SOP)
PS93xx Series
(SDIP)
PS98xx Series
(Small SOP)
PS99xx Series
(LSDIP)
Digital output   
~15Mbps
Low supply current
TRIAC Control Photocoupler (standard) PS23xx Series
PS27xx Series

PS28xx Series
High isolation voltage (5kVr.m.s.), 4p-LSOP, Ta=115°C
High isolation voltage (3.75kVr.m.s.), 4p-SOP, Ta=110°C
High isolation voltage (2.5kVr.m.s.), 4p-SSOP, Ta=110°C
Interface in PFC
circuit
Photocoupler (IGBT drive) PS93xx Series
(6/8p-SDIP)
PS94xx Series
(16p-SOP)
PS95xx Series
(8p-DIP)
PS99xx Series
(8p-LSDIP)
High isolation voltage (5kV~7.5kVr.m.s.)
0.6~2.5A output
High CMR (CMR≧50kV/μs)
Related Application Notes/Sample Code
Name Document No.
R2A20112A application note R03AN0009EJ0100
R2A20114B application note R03AN0011EJ0100
RL78/G13 Initialization R01AN0451EJ0201
RL78/G13 A/D Converter (Software Trigger and Sequential Conversion Modes) CC-RL R01AN2581EJ0200
RL78/G13 Timer Array Unit (PWM Output) R01AN0455EJ0200
RL78/G14 Timer RD in Complementary PWM Mode R01AN0865EJ0110
RL78/G14 Timer RD in Reset Synchronous PWM Mode R01AN0866EJ0110
RL78/G14 Serial Array Unit (UART Communication) CC-RL R01AN3278EJ0100
RL78/G1F Serial Array Unit (UART Communication) CC-RL R01AN3314EJ0100
RX130 Group Initial Setting R01AN2592EJ0200
RX230 Group Initial Setting R01AN2826EJ0100
RX24T Group Initial Settings Example R01AN2837EJ0100
RL78/L12 Serial Array Unit (UART Communication) CC-RL R01AN3316EJ0100
RL78/L13 Serial Array Unit (UART Communication) CC-RL R01AN3317EJ0100
RL78/L13 How to Output Remote Control Signals R01AN1509EJ0100
RX Family RX Driver Package Ver.1.11 R01AN3467EJ0111
CS+ Code Generator Tool Integrated Development Environment User's Manual: RX API Reference R20UT3103EJ0130
e2 studio Code Generator User's Manual: RX API Reference R20UT2864EJ0130
CS+ Code Generator Tool Integrated Development Environment User's Manual: RL78 API Reference R20UT3102EJ0104
e2 studio Code Generator Integrated Development Environment User's Manual:RL78 API Reference R20UT3127EJ0104
For application notes about motor control, please see the Motor Control page. -
For application notes about capacitive touch, please see the Capacitive Touch Sensor page. -
Related Software
Name Document No.
M3S-S2-Tiny sound playback system * -

*: Please contact your sales representative or contact us directly.

Related Boards
Name Part No.
R2A20114B evaluation board * -
R2A20112A evaluation board * -
24V Motor Control Evaluation System for RX23T RTK0EM0006S01212BJ
RX24T CPU Card RTK0EM0009C03402BJ

*: Please contact your sales representative or contact us directly.