Since refrigerators work continuously, it is important to reduce their power consumption. At the same time, the market demand for ample indoor space is driving the need for thinner heat insulators and smaller motors. Because refrigerators are used in homes, it is necessary to improve motor efficiency, even at low speeds, in order to reduce acoustic noise and vibration. An inverter controls a compressor. Various sensors and a microcontroller work in tandem to regulate indoor temperatures and humidity. The compressor driver consists of IGBTs or power MOSFETs (PWMOSFETs). 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.

Block Diagram

Block diagram of refrigerators. Power MOSFETs Intelligent Power Device(IPD) Moter Driver MCU Photocoupler MCU MCU Moter Driver Moter Driver Driver Driver Photocoupler Photocoupler Photocoupler Sensor Input

Product Introduction

  • MCUs for main control
  • MCUs for motor control
  • MCUs for operation panel control
General-Purpose Linear ICs
  • Moter Control
    • Motor controllers/Drivers
  • C,R,F Interior Fan
    • Motor controllers/Drivers
  • Motor Damper
    • Motor controllers/Drivers
  • Ice Maker
    • Motor Controllers/Drivers
  • PFC Control
    • PFC (IC)
Optical Semiconductor Devices
  • Defrosting Heater
    • Photocouplers
  • Indoor Lamp
    • Photocouplers
  • Heater
    • Photocouplers
  • IGBT/MOSFET Driver
    • Photocouplers
  • Door open detection
    • Digital-output Magnetic sensors
  • Compressor Control
    • IPDs
  • PFC Circuit
    • IGBTs
  • General-Purpose Surge Absorption and Circuit Protection
    • Zener Diodes
    • ESD Protection Diodes
    • Switching Diodes
    • Schottky Barrier Diodes

* System and product names mentioned herein may be trademarks or registered trademarks of respective companies or organizations.

New products

New products of Refrigerators on one year in the past.

2.3mm thin SO6L package gate driver coupler: TLP5701, TLP5702

The package photograph of 2.3mm thin SO6L package gate driver coupler:  TLP5701, TLP5702.

We have commercialized thin SO6L package gate driver couplers TLP5701 and TLP5702, capable of driving small capacity IGBT and power MOSFET directly. The output power of TLP5701 is 0.6A, and that of TLP5702 is 2.5A. (27 Mar, 2014)
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