[Introduction] With the increasing awareness of energy use and environmental protection, there is an increasing demand for humanized and personalized products. Energy conservation, environmental protection, and intelligence have gradually become consumers' new demands for white goods. How to provide more efficient power management, more precise motor control and more convenient human-computer interaction for white goods has become a new goal of white goods manufacturers. Here are a few of the most energy-efficient designs based on ON Semiconductor devices.

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As the world's leading supplier of high-performance silicon solutions, ON Semiconductor is committed to providing system-wide technologies and solutions for the white goods sector, providing power and signal management, logic, discrete and custom devices to help white goods customers. Overcome the design challenges faced in power management, motor drive, system control, user interface, communication interconnect and other functional modules.

Figure 1. Simplified block diagram of the whiteware function module

Power management function module

ON Semiconductor is actively involved in the development and updating of various specifications and incentive programs (such as ENERGY and 80 PLUS) in various energy standards and standards, and introduces solutions and products that comply with all relevant regulations around the world. ON Semiconductor offers a broad lineup of power management solutions to help customers meet the challenges of power management critical areas such as low standby power consumption, high energy efficiency, and power factor correction. Its GreenPoint reference design specifies the direction in which the energy-efficient power supply is designed. The schematics, bill of materials (BOM), PCB Gerber files, design priorities, and test reports included in the reference design help engineers shorten design cycles and speed time-to-market.

ON Semiconductor's solutions for white goods power management function modules include AC-DC conversion, DC-DC conversion, power factor correction (PFC) and power supply inverter. ON Semiconductor's high-performance AC-DC off-line regulators integrate high-voltage power MOSFETs to simplify the design of low-power switching power supplies. The NCP107x (0/1/2/5/6/7) series is available in PDIP-7 or SOT-223 packages and integrates a 700 V high-voltage MOSFET with current mode 65/100/130kHz fixed frequency for 3W to 15W. Power application. This series supports frequency anti-going and skip-cycle modes, which can effectively improve the light load energy efficiency of the power supply. In addition, the series also features a built-in high voltage start-up function that supports Dynamic Self-Powered (DSS) and provides a lossless start-up sequence. Motor drive function

ON Semiconductor offers discrete and modular designs for white goods variable frequency drives:

Discrete design devices: ON Semiconductor's MOSFET/IGBT gate drivers NCP5104, NCP5106, NCP5111, NCP5181 can operate at input voltages up to 600V, have dv/dt immunity of 50V per nanosecond, and are compatible with 3.3V and With 5V input logic, these devices use bootstrap technology to ensure driving high-side power switches and provide a rugged design.

ON Semiconductor's IGBT products for power factor controllers include NGTB05N60, NGTB10N60, NGTB15N60, NGTB20N60L2, NGTB30N60 with freewheeling diodes; IGBT products for motor driven passive power factor correction are NGTG12N60, NGTG15N60S1, NGTG20N60L2, NGTG30N60F, NGTG50N60F, Without freewheeling diodes.

Figure 4. IGBT for power factor controller. Figure 5. IGBT for motor drive power factor correction.

ON Semiconductor's motor-controlled MOSFETs feature low on-resistance, low capacitance, low gate charge, minimize device turn-on losses, switching losses, and driver losses, providing high avalanche resistance and high current Passing ability.

Modular design: ON Semiconductor uses IMST (Insulated Metal Substrate Technology) technology to package discrete passive devices (resistors, capacitors), discrete active devices (diodes, transistors) and integrated circuits (gate drivers, DSP, logic) In the same intelligent power module (IPM).

Figure 6. Diagram of ON Semiconductor's proprietary Insulated Metal Substrate Technology (IMST)

The Intelligent Power Module (IPM) includes gate drive, undervoltage protection (UVLO), overtemperature detection, and current sensing. It can be integrated with PFC through internal optimized wiring to improve EMI and heat dissipation.

ON Semiconductor's stepper motor drivers for white motor motor motion control provide high-precision microstepping for smooth, quiet operation. AMIS-30622 integrated sensorless stall detection, can dynamically control speed, torque and position to maintain continuous operation; LB1948MC and LV8548MC can provide bipolar and BiDCMOS options, support single-channel stepper motor / dual-channel DC motor, excitation mode support Full step, half step, low saturation voltage, low on-resistance, etc.; LV8712T adopts single channel PWM constant current control, excitation mode includes full step, half step, 1/4 step, 1/8 step, integrated overheat shutdown, Low voltage detection and protection such as active flyback.

ON Semiconductor offers single-phase and three-phase motor drivers for brushless DC motor (BLDC) drives. The LB11685AV features sensorless design, pulse amplitude modulation (PAM) control, soft start for improved start-up stability, and soft switching. It helps to provide silent drive, built-in current limiter, over temperature shutdown and beat lock protection; LV8136V is a three-phase BLDC motor PWM system pre-driver IC, providing energy-efficient, 150° PWM silent drive. User interface function module

1) Capacitive touch sensor solution

ON Semiconductor LC717A00/10 Capacitance-to-Digital Converters Large Scale Integrated Circuits (LSIs) offer 8/16-channel capacitance-sensor inputs for a variety of switching applications. With differential capacitance detection, the capacitance variation of the millifarad stage can be detected. The LSI has an automatic calibration function and an on/off determination. The input (on/off) detection result of each input can be controlled by a serial interface (I2C compatible bus or SPI) read. In addition, the measured value of each input can be read as 8-bit digital data, and the gain and other parameters can also be adjusted through the serial interface.

The capacitive touch sensor from ON Semiconductor offers customers a flexible, low cost, high reliability design with no adhesives, long sensor traces, wide operating temperature range, no additional components, and high noise immunity.

Figure 7. ON Semiconductor Capacitive Touch Sensors are highly sensitive, support gloved touch, and support air gap applications

2) Ambient light and distance sensor

ON Semiconductor's ambient light sensor has design flexibility, can be adjusted in EEPROM as needed, custom filter 0.0125 lux detection (ie, clear light response), with dark current and temperature compensation, minimum energy consumption per unit resolution, high speed The mode of the I2C interface will not affect the bus operation when the power is turned off. ON Semiconductor ambient light sensors include digital outputs (such as NOA1305) and analog outputs (such as NOA1212). Also available are distance sensors NOA2301, NOA2302 and NOA3301.

3) LCD driver

ON Semiconductor offers LCD segment drivers for white goods, ranging from static to 1/10 duty cycle and dot matrix drivers. The LC79401KNE is an 80-segment segment driver LSI that supports graphic dot matrix liquid crystal display. It supports 4-bit parallel input and can drive large-screen LCD panels when used with the group driver LC79430KNE.

4) Communication interconnection

Interconnection and communication between white goods can be achieved via wireless (Zigbee or WiFi) or existing power line infrastructure. Power outlets are found in every corner of the home, making the power line an extremely wide network. Using its advanced semiconductor technology, ON Semiconductor's power line carrier (PLC) modems and power line drivers enable customers to easily build networked intelligent control systems.

ON Semiconductor offers a range of leading spread-spectrum frequency shift keying (S-FSK) PLC modems. The NCN49599 and NCN49597 are based on the ARM Cortex M0 core MCU. They also support AC and DC operation with a maximum baud rate of 4.8k per channel. In the Cenelec A, B, C and D bands, the NCN49599 integrates a power amplifier. AMIS49587, AMIS30585 is based on ARM7 core MCU, only supports AC work, the maximum baud rate per channel is 2.4k and 1.2k respectively. These narrowband PLC modems embed PHY+MAC and comply with strict international standards (FCC, CENELEC, IEC61334-5-1) for operation on low and medium voltage networks.

ON Semiconductor's PLC driver product NCS5650 is a high performance, low distortion Class AB driver. The NCS5650 consumes only 150uA in shutdown mode. At an output current of 1.5A, the output voltage ensures swinging at 1.0V or less at any input, ensuring an optimal signal-to-noise ratio in a tight environment.

5) Protection

Ground Fault Circuit Interrupter (GFCI) is a special protective device for North American regulations that protects against the risk of electric shock. GFCI complies with the UL943 standard. ON Semiconductor's NCS37000 GFCI signal processor for FireWire-Neutral-Ground Protection. Very few components and a low turns ratio ferrite current transformer, significantly reducing material costs, dedicated DSP controllers provide optimum harmful load rejection, self-synchronizing internal oscillators based on AC line frequency adjustment Full precision range can be achieved on 50Hz and 60Hz power distribution systems.

Figure 8. ON ​​Semiconductor NCS37000 GFCI Signal Processor Application Diagram System Control Function Module

ON Semiconductor offers a wide range of MCU products for white goods control, primarily for system control, LCD display control, and control of small electrical systems. Increasing demand has made MCU products more and more integrated, and power consumption requirements have become more stringent. Taking the LC87F7932B as an example, the average power consumption of 0.45 μA is only provided in the RTC mode, and the total average is measured in the case of controlling the LCD display, RTC operation, and intermittent operation to detect the sensor's 12-bit analog-to-digital converter (ADC). The energy consumption is only 1.5 μA.

The 32-bit MCU based on the ARM Cortex core is also growing rapidly in the field of white goods. In the future, 8/16 bits will dominate simple applications, and 32-bit will dominate complex applications.

Figure 9. Air conditioning outdoor unit case based on ARM Cortex-M3 32-bit MCU

The PLL clock synthesizer/generator from ON Semiconductor is based on phase-locked loop technology with zero PPM synthesis error, provides low-jitter, high-precision clock signals, supports industrial temperature ranges from -40°C to +85°C, supports LVPECL, LVDS, HCSL, LVTTL / LVCMOS multiple output interfaces.

ON Semiconductor offers EEPROM products ranging in size from 1kb to 2Mb, capable of operating from a wide VCC operating voltage range of 1.8/1.7V to 5.5V, supporting industrial and extended temperature ranges.

The use of ON Semiconductor's complete and mature system solutions will help white goods manufacturers to better meet the needs of end consumers and provide safe and reliable white goods products to the market. ON Semiconductor's vast network of global design and application resources will also provide customers with specialized technical support to help products quickly enter the market.

Pay attention to ON Semiconductor's official WeChat to learn more innovative and energy-efficient solutions

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