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Air conditioners were the first major home appliance to use inverter control. Key semiconductor devices used for inverter control of a compressor motor include microcontrollers, insulated gate bipolar transistors (IGBTs) and photocouplers. Microcontrollers provide overall system control, pulse-width-modulation (PWM) generation and system protection functions. IGBTs and photocouplers reside in the inverter driver circuit and its interface, respectively. These days, more and more air conditioners feature a self-cleaning capability and a vector-controlled compressor motor for energy saving. Power factor correction (PFC) ICs or IGBTs are used in the power supply circuit to keep harmonics in the input current below the IEC limit.

Air Conditioners Block Diagram

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Air Conditioners Block Diagram

Communication Sensor Motor System Control System Control Interface Sensor Motor Solenoid Remote Controller Power Supply Power Management General-purpose
    TVS Diode for ESD Protection
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  PhotocouplerMicrocomputerMicrocomputerPhotocouplerPhotocoupler Single-Chip Inverter IC Motor Controller  Motor Driver Motor Controller IPD Motor Driver IGBT Microcomputer

Applications Semiconductor Recommend Device Features
Compressor driver

Power MOSFET

TK16A60W5 / TK20A60W5
IGBT GT15J341 / GT20J341 / GT30J341 Low loss and low noise
Outdoor Fan motor Power MOSFET TK7P60W5 / TK8P60W5
Outdoor PFC Circuit IGBT GT30J122A / GT20J121 Low loss
General-purpose switches Small-signal transistors 2SA1162(PNP) / 2SC2712(NPN) SOT-346(S-Mini)2in1
2SA1586(PNP) / 2SC4116(NPN) SOT-323(USM)2in1
RN24xx(PNP) / RN14xx(NPN) SOT-346(S-Mini) ;bias resistor built-in transistors
RN23xx(PNP) / RN13xx(NPN) SOT-323(USM) ;bias resistor built-in transistors
Applications Semiconductor Recommended Device Features
General-Purpose Surge Absorption
and Circuit Protection
Zener Diodes CRYxx / CRZxx Series 0.7 W
CMZBxx Series 1.0 W
ESD Protection Diodes DF2SxxFS Series SOD-923/150 mW (1 in 1)
DF3AxxFU Series SOT-323/100 mW (2 in 1)
DF5AxxJE Series SOT-553/200 mW (4 in 1)
Switching Diodes 1SS352 SOD-323(USC)1in1
1SS181 / 1SS184 / 1SS226 SOT-346(S-Mini)2in1
1SS300 / 1SS301 / 1SS302 SOT-323(USM)2in1
Schottky Barrier Diodes CES520 / CES521 SOD-523(ESC)1in1
1SS392 / 1SS396 SOT-346(S-Mini)2in1
1SS393 SOT-323(USM)2in1
HN2S02FU SOT-363(US6)3in1
Applications Semiconductor Recommend Device Features
Outdoor IGBT / MOSFET Driver Photocouplers TLP155E / TLP701H / TLP351H Direct IGBT/MOSFET drive
Two- / four-way valve Photocouplers TLP360J/ TLP363J
TLP267J / TLP268J
Phototriac coupler
Communication interface
between indoor and outdoor units
Photocouplers TLP183 / TLP188
TLP2301
Transistor-output photocouplers,
IC Photocouplers
Applications Semiconductor Recommend Device Features
Indoor Fan Motor Motor Controllers/Drivers TB67B000HG Brushless DC motor driver; Sine-wave current control
TB6584FNG / AFNG
TB6551FAG
TB6631FNG / TB6634FNG
Brushless DC motor controller; Sine-wave current control
TB6586FG / AFG / BFG Brushless DC motor controller
IPDs TPD4151K
TPD4142K
Thin package, High voltage, High-current pins are isolated from control pins on the opposite sides of the package.
Outdoor Fan Motor Motor Controllers/Drivers TB67B000HG Brushless DC motor driver; Sine-wave current control
TB6584FNG / AFNG
TB6551FAG
TB6631FNG
TB6634FNG
Brushless DC motor controller; Sine-wave current control
TB6586FG / AFG / BFG Brushless DC motor controller
IPDs TPD4123K / AK Thin package, High voltage, High-current pins are isolated from control pins on the opposite sides of the package.
TPD4144K/ AK
TPD4135K / AK
Indoor Louver Motor Motor Controllers/Drivers TD62003APG / AFG Transistor array
TB62210FNG / TB62211FNG
TC78S600FNG / FTG
TB62261FTAG / FTG
TB6226FTAG / FTG
TB6608FNG
Two-phase stepping motor driver
TC78H600FNG / FTG
TB6552FNG / FTG TC78H610FNG
Full-bridge driver for a brushed DC motor
Indoor Filter Cleaner Motor 1 Motor Controllers/Drivers TB6585FG / AFTG Brushless DC motor driver; sine-wave current control
Indoor Filter Cleaner Motor 2 Motor Controllers/Drivers TB6608FNG
TC78S600FNG / FTG
Stepping motor driver; 3-bit microstepping
Outdoor PFC Control PFC (IC) TB6818FG PFC transformer humming prevention
Various IC power supplies LDO TCR2EFxx Series SOT-25(SMV)/200-mA output
TCR3DFxx Series SOT-25(SMV)/300-mA output

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