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Air conditioner indoor unit

Products and reference designs
Block diagram

Air conditioner indoor unit

Block diagram

Overview

Our integrated circuits and reference designs help you create highly efficient air conditioner indoor unit systems with advanced motor fan control, accurate environmental sensing and secure wireless connectivity features that meet energy label requirements.

Design requirements

    Modern air conditioner indoor unit systems require:

  • Variable speed, high-efficiency brushless direct current (BLDC) motor control.
  • Highly-efficient power supply with low standby power.
  • Secure, robust and reliable wireless connectivity.
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Block diagram

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Air conditioner indoor unit

AC input AC input DC DC Digital processing Digital processing MCU MCU Sensors Sensors Air quality sensors Air quality sensors Temperature sensors Temperature sensors Humidity Sensors Humidity Sensors Sun light sensors Sun light sensors Infrared sensors Infrared sensors Human activity sensors Human activity sensors Proximity sensors Proximity sensors 3D ToF 3D ToF Monitoring Monitoring Watchdog Watchdog Temperature Temperature Reset Reset Horizontal louver motor Horizontal louver motor Vertical louver motor Vertical louver motor 4 speed AC fan motor 4 speed AC fan motor BLDC fan motor BLDC fan motor M M M M M M M M Buzzer Buzzer Heater Heater Wired interface Wired interface Protection Protection UART UART Isolation Isolation Protection Protection RS485 RS485 Protection Protection CAN CAN Protection Protection PLC PLC Protection Protection LIN LIN Protection Protection Homebus Homebus Output user interface Output user interface LED / TFT LCD display LED / TFT LCD display LED driver LED driver Backlight LED driver Backlight LED driver Level shifter Level shifter Touch screen controller Touch screen controller TFT LCD driver TFT LCD driver Audio output Audio output Power stage Power stage Relay driver Relay driver Relays Relays Gate driver Gate driver Triacs Triacs MOSFETs MOSFETs IGBTs IGBTs Wireless interface Wireless interface Wifi Wifi Bluetooth Bluetooth 2.4G RF transceiver 2.4G RF transceiver Input user interface Input user interface Inductive /capacitive sensing Inductive /capacitive sensing Dial Dial Touch keys Touch keys Transmitter & receiver Transmitter & receiver Gesture recognition Gesture recognition Haptics driver Haptics driver Audio input Audio input EEROM memory EEROMmemory Current sense Currentsense Voltage sense Voltagesense Current & voltage sense Current & voltagesense REF REF Comp Comp Amp Amp Amp Amp Input power protection Input power protection Fuse Fuse X capacitor discharge X capacitordischarge Inrush current protection Inrush currentprotection Varistor Varistor EMI protection EMI protection Arc-fault circuit interrupter Arc-fault circuit interrupter Non-isolated AC/DC power supply Non-isolated AC/DC power supply PWM controller PWM controller Diode bridge rectifier Diode bridge rectifier Isolated AC/DC power supply Isolated AC/DC power supply PWM controller PWM controller Diode bridge rectifier Diode bridge rectifier Power protection & gating Power protection & gating E-fuse & protection E-fuse & protection Load switch Load switch Non-isolated DC/DC power supply Non-isolated DC/DC power supply DC-DC DC-DC LDO LDO Motor drive Motor drive Gate driver Gate driver BDC motor Ddriver BDC motor Ddriver BLDC motor driver BLDC motor driver Hall sensor Hall sensor Step motor driver Step motor driver MOSFET/IGBT MOSFET/IGBT Analog front-end Analog front-end MUX MUX REF REF ADC ADC AMP AMP

Output user interface

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Appealing, yet cost effective HMI solutions from indication LEDs to high-end touch screens and displays.

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Power management (7)
LED display drivers
  • TLC5946—16-channel, 12-bit PWM LED driver with 6-bit dot correction
    Data sheet: PDF | HTML
Backlight LED drivers
  • TPS61165—High brightness white LED driver in 2mm x 2mm QFN Package
    Data sheet: PDF | HTML
  • LM3630A—LM3630A high-efficiency dual-String white LED driver
    Data sheet: PDF | HTML
RGB LED drivers
  • TLC59116—16-bit Fast-Mode Plus (FM+) I2C-Bus constant-current LED sink driver
    Data sheet: PDF | HTML
  • TLC59283—16 channel constant current LED driver with pre-charge FET
    Data sheet: PDF | HTML
  • LP5813—Synchronous boost 4 x 3 matrix RGB LED driver with I2C and auto animation control
    Data sheet: PDF | HTML
LCD & OLED display power & drivers
  • TPS65105—4-CH LCD Bias w/ Fully Int. Pos. Charge Pump, 3.3V LDO Contr., 0.96A Min. Boost Ilim, Fault & VCOM
    Data sheet: PDF | HTML
Audio (3)
Speaker amps
  • TPA6211A1—3.1-W, mono, analog input Class-AB audio amplifier
    Data sheet: PDF | HTML
  • LM4890—1 Watt Audio Power Amplifier
    Data sheet: PDF | HTML
  • TAS2572—6.6W digital-input smart amplifier with I/V sense and integrated 13V Class-H boost
    Data sheet: PDF | HTML
DLP products (2)
≤ 0.47-in array pico products
  • DLPC2607—DLP® display controller for DLP2000 (0.2 nHD) DMD
    Data sheet: PDF | HTML
  • DLP2000—0.20-inch nHD DLP® digital micromirror device (DMD)
    Data sheet: PDF | HTML
  • TIDA-01473—Ultra-Mobile, Low Power nHD Display Reference Design with TI DLP® Technology for Low-Cost Processors
    Design guide: PDF Schematic: PDF
  • TIDA-01559—Capacitive Touch Based User Interface with Proximity Sensing and LED Animation Reference Design
    Design guide: PDF Schematic: PDF
  • TIDA-03026—Status Indication Reference Design With LED and Audio Feedback
    Design guide: PDF Schematic: PDF
  • TIDEP0015—Capacitive Touchscreen Display Reference Design
    Schematic: PDF

Technical documentation

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Type Title Date
White paper TI DLP® Pico™ Technology for smart home applications (Rev. B) 27 Feb 2019
Application note Design and Implementation of Stepper Motor Control Over I2C Communication 21 Dec 2018
Technical article Can your RS-485 communication survive the great outdoors? PDF | HTML 14 Sep 2023
Technical article Are you smarter than a fifth-generation appliance? PDF | HTML 13 Sep 2023
Application brief Increasing Power Density With Active Clamp Flyback (UCC28780) 10 May 2022
Technical article Get smarter about ‘zero’ standby power in your next appliance design PDF | HTML 06 Sep 2023

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