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Water Purifier
작성일 2025-08-27 작성자 최고관리자

Air Purifier

Energy-Efficient Power Management and Precision Control Solutions

Air purifiers go beyond simple air purification,
providing users with a comfortable and quiet environment through optimal power efficiency
and precise control. AP SEMI possesses a diverse product lineup for these drive solutions.

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01

Air Purifier Block Diagram

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02

Product

  • Motor Drive
  • High Voltage MOSFET
  • Bipolar Transistor
  • Schottky Barrier Diode
  • Switching Diode
  • Zener Diode
  • Regulator
  • OP Amp

03

Solution Configuration

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  • 01

    Motor Drive IC (MDI)

    • • Optimized for driving fan and compressor motors
    • • Achieves low noise and high-efficiency operation
  • 02

    MOSFET

    • • Minimizes heat generation and power loss by securing high efficiency and reliability
    • • Low Rds(on) even at high voltages -> Optimized for compressor inverter circuits
  • 03

    Bipolar Transistor (BJT)

    • • Provides stable power amplification and switching
    • • Secures strong durability in high-current sections
  • 04

    Schottky Barrier Diode (SBD)

    • • Secures strong durability in high-current sections
    • • Maximizes efficiency with low forward voltage drop
  • 05

    Switching Diode

    • • Optimized for PWM inverters and control circuits with fast ON/OFF switching
    • • Minimizes power loss and reduces heat generation
  • 06

    Zener Diode

    • • Voltage stabilization and overvoltage protection
    • • Stably protects key circuits and ICs
  • 07

    Regulator

    • • Supplies stable DC voltage for control IC sensors and digital circuits
    • • Suppresses voltage fluctuations and stabilizes the system
  • 08

    OP AMP

    • • Stably transmits subtle sensor output to the control IC/MCU
    • • Overcurrent shutdown based on current detection → Motor compressor protection

Expected Benefits

  • High-Efficiency Energy Savings

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    Reduced energy consumption by minimizing power loss

  • Enhanced System Stability

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    Circuit protection from overvoltage, reverse current, and heat

  • Compact and Lightweight Design

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    Simplified thermal management and optimized PCB space

  • Improved User Experience

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    Fast response, quiet operation, and extended lifespan

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04

Motor Driver

This IC receives signals from the MCU (Micro Control Unit) and controls the motor.
We supply various package products including Stepper / BDC / BLDC Motors depending on functionality.
Our motor drive ICs minimize power loss through precise speed control and high-efficiency characteristics,
maximizing system reliability.

  • Features

    High-Efficiency Power Control: Energy savings through motor speed and torque optimization via control

    Low Noise, Low Vibration: Minimizes noise during refrigerator operation through motor rotation control

    Enhanced System Safety: Built-in overcurrent, overvoltage, and overheat protection functions

  • Application Examples
    Compressor Motor Drive / Dispenser Motor Drive / Fan Motor Control

3Phase BLDC Motor

Main Applications
  • Compressor Motor (Refrigerant Compression)
  • Fan Motor (Air Circulation)
Features
  • Capable of driving at various speeds
    through inverter control
  • Minimizes noise during fan and compressor operation
  • High efficiency at rated speed and reduced
    power consumption
  • No brush wear and noise issues

Stepper Motor

Main Applications
  • Door Dispenser Control
  • (Water · Ice Dispenser · Ice Maker)
  • Vertical Louver Control
    (Air Flow Direction Control)
Features
  • Rotates at defined step angles
    → Precise position control possible
  • Optimized for precise dosing drive and
    small mechanism control through rotation angle control
  • Open-loop drive possible
    without separate position sensors

MDI Lineup by
Motor Drive Type

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    2ch Full Bridge Motor

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    1ch Stepper Motor

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05

MOSFET for Power Inverter Applications

This is a power switching device that is critical for inverter circuits,
power supply, and motor drives.
We supply various package products including High Voltage MOSFET,
Super Junction MOSFET, and Low Voltage Trench MOSFET.
Through low on-resistance (Rds(on)) and high-speed switching characteristics,
it reduces power loss
and supports high-efficiency operation.

  • Features

    High-Speed Switching: Optimized for various VDS[V] ranges

    Low Heat, High Efficiency: Minimizes heat generation with ultra-low Rds(on)

    Precise Control: High-efficiency power device optimized for inverter drives

    System Stability: Overcurrent/overheat protection

  • Application Examples
    BLDC Inverter Drive Switch / High Voltage Circuit Protection / Fan Motor Switching
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06

Bipolar Transistor

This is a bipolar transistor that increases efficiency by minimizing low power and loss.
We supply ultra-small package products.
Our bipolar transistors are devices responsible for current amplification and switching,
used in control board relays and low-power switching circuits.

  • Features

    Current Amplification: Provides stable drive current

    Enhanced Switching Speed: Stable operation in sections requiring signal transition

    Circuit Simplification: Enables miniaturization and cost reduction

    System Protection: Prevents current overload

  • Application Examples
    Control Board Signal Amplification / Air Purifier Status Display Drive / Auxiliary Drive (Relay)
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07

Schottky Barrier Diode

This is a diode using the Schottky barrier generated through metal-semiconductor junction.
We supply ultra-small package products.
Our Schottky barrier diodes minimize power loss with low forward voltage
and fast switching characteristics, applied to power rectification,
reverse current blocking, and SMPS circuits.

  • Features

    Low Power Loss: Low forward voltage drop reduces energy loss
    and provides electricity cost savings

    High-Speed Switching: Stable operation in sections requiring fast signal transition
    such as PWM control and inverter circuits

    Enhanced System Stability: Protects electronic components by minimizing
    overvoltage during reverse current and switching

    Miniaturization
    and Weight Reduction:
    Low heat simplifies thermal design, enabling overall circuit miniaturization

  • Application Examples
    Motor Reverse Current Blocking / Power Section Rectification Circuit
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08

Switching Diode

This is a switching diode for rectification and switching.
We supply various package products with short reverse recovery time (trr).

Our switching diodes are used in circuits requiring fast ON/OFF switching,
applied to control signals and small switching circuits.

  • Features

    High-Speed Switching Stability: Accurate signal transmission in PWM inverter and motor control
    circuits with fast reverse recovery in nS units

    System Efficiency Improvement: Reduces heat generation by minimizing power loss, improving overall system efficiency

    Miniaturization
    and Weight Reduction:
    Low heat simplifies thermal design, enabling overall circuit miniaturization

  • Application Examples
    Electronic Circuit Protection / PWM Signal Rectification / Control Signal Stabilization
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09

Zener Diode

This is a Zener diode used in constant voltage circuits.
We supply ultra-small package products for protecting
ICs from surges or static electricity.
Our Zener diodes safely conduct current above a specific voltage,
maintaining constant voltage and protecting circuits from overvoltage.

  • Features

    Voltage Stabilization: Supplies constant voltage to key circuits despite input voltage fluctuations

    Circuit Protection: Protects major components such as motors and inverters by distributing current during overvoltage

    Enhanced System Reliability: Ensures stable operation despite power fluctuations or external abnormal voltages

    Versatile Design Application: Customizable application to various circuit conditions according to Zener voltage selection

  • Application Examples
    MCU and Drive IC Protection Circuit / Voltage Stabilization of Sensor and Communication Circuits
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10

Regulator

This is a regulator used to regulate and maintain input voltage or pressure at a stable level.
We supply various package products to ensure stable operation of connected devices.
Our regulators are used to provide stable power supply
to control boards, sensors, and microcontrollers.

  • Features

    Voltage Stabilization: Supplies stable DC voltage

    Noise Suppression: Minimizes sensor signal errors

    System Protection: Includes overvoltage/overheat protection functions

  • Application Examples
    Stable Power Supply to MCU, Sensors, Motor ICs / Overvoltage and Undervoltage Protection
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11

OP Amp

This is an OP AMP that amplifies and outputs the voltage difference between two input terminals.
We supply various package products for amplification, operation, and filtering.
Our OP AMP is used to ensure stability in sensor interfaces and control.
It enables accurate measurement, protection, and control,
used in solutions that simultaneously improve energy efficiency and product reliability.

  • Features

    High Input Impedance
    / Low Output Impedance:
    Can amplify sensor signals without distortion

    Low Offset Voltage & Drift: Stable operation during long-term use

    Low Noise Characteristics: Improves sensor measurement reliability

    Rail-to-Rail Input/Output Support: Advantageous even in low voltage drive circuits

  • Application Examples MCU Signal Assist / Dust/Gas Sensor Signal Amplification
    PID (Proportional-Integral-Derivative) Control Signal Processing
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At the Heart of Global Innovation,
Delivering Semiconductor Solutions
that Shape Tomorrow’s World.

Cs Cetnter070-4693-2299

인천광역시 미추홀구 경인로 229 인천IT타워 505호(도화동) |
대표이사 : 이용학 |
전화 : 070-4693-2299 |
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이메일 : yhrhee@apsemi.com

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