With the development of my country’s economy, the economy of beauty has been heating up in recent years. Ordinary beauty and skin care products can no longer meet the needs of consumers for beauty and skin care. Therefore, they are faster than ordinary skin care products, and are cheaper than medical beauty and maintenance. Home beauty instruments are gradually being favored by consumers. Especially since 2018, the rise of live broadcasts has allowed more consumers to learn about beauty instrument products, and the entire beauty instrument market has begun to grow rapidly. Among them, the proportion of high-end beauty instruments above 1,000 yuan is close to 50%, which also shows that people have a higher pursuit of the effect and quality of beauty instruments.

With the development of my country’s economy, the economy of beauty has been heating up in recent years. Ordinary beauty and skin care products can no longer meet the needs of consumers for beauty and skin care. Therefore, they are faster than ordinary skin care products, and are cheaper than medical beauty and maintenance. Home beauty instruments are gradually being favored by consumers. Especially since 2018, the rise of live broadcasts has allowed more consumers to learn about beauty instrument products, and the entire beauty instrument market has begun to grow rapidly. Among them, the proportion of high-end beauty instruments above 1,000 yuan is close to 50%, which also shows that people have a higher pursuit of the effect and quality of beauty instruments.

Among the beauty instrument products, most of the products are aimed at facial beauty, with various functions, mainly focusing on cleaning and anti-aging. Beauty instruments are roughly divided into five types: vibration types that use electric motors to achieve high-frequency vibration effects, optical types that use different wavelengths of light to heal the skin, radio frequency heat types that shape lines by controlling temperature, and use micro-current technology to tighten Electric currents of the skin and fumigation that achieve beauty effects through the penetration of water vapor. As shown in Figure 1.

Introduction of portable beauty/health massage instrument and TI low-power solution
Figure one

The other category is health massage. With the advent of the era of great health, everyone has higher and higher health requirements, and the demand for massage appliances is also increasing. In the context of consumption upgrades, massage devices for the head, eyes, neck and other subdivisions have gradually appeared on the market, and there are many health massage products from head to toe. As shown in Figure 2.

Introduction of portable beauty/health massage instrument and TI low-power solution
Figure II

Different types of portable beauty instruments and health massage products have common requirements, that is, low power consumption and small size, so as to ensure the volume and use time of the beauty instrument.

Let us start with TI’s low-power products and introduce the star products used in beauty instruments and health massage instruments.

1. Lithium battery charging chip.

Most of the products use USB 5V voltage to charge the lithium battery, because the beauty device is directly in contact with the human face, there will be risks if plugged in, and you don’t want customers to use it while charging, so generally they will not choose charging with path management. chip. BQ25170 and BQ25302 are TI’s new generation of extremely simple and energy-saving lithium battery charging chips, only need to configure the external 6 resistors and capacitors to achieve the charging function. BQ25170, this is an 800mA single-cell lithium wire-based charging chip, which supports up to 30V withstand voltage and 0.35uA quiescent current. It has a feature that it supports adjustable output charging voltage, which can be achieved by adjusting a resistor on the output pin. Charging voltage of 3.5V-4.4V. While supporting low-voltage lithium iron phosphate batteries, it also supports 4.4V high-voltage lithium batteries. If you need more current, the switching lithium battery charging chip BQ25302 can support 2A charging current, and the charging voltage also supports resistance adjustment. The quiescent current is as low as 3.5uA, which is at least 5-10 times lower than the older generation of charging chips.

More powerful beauty instrument products, generally use 2 batteries in series, you can use the 5V boost charging chip BQ25886, support 2 2A boost charging, no need to use a special adapter, just use an ordinary 5V adapter, saving costs.

Figure 3 shows the detailed parameters:

Introduction of portable beauty/health massage instrument and TI low-power solution
Figure three

2. Boost chip

Mainly recommend TPS61099 and TPS61322 series. Among them, the quiescent current of TPS61099 can be as low as 0.8uA, and it supports ultra-low voltage input of 0.7V. Another TPS61322X series has a fixed output, and the current is slightly larger than TPS61099. If the power consumption is not particularly strict, you can choose this 6uA boost chip. Both of these two boost chips support light load and high efficiency, and the load efficiency of 1mA is above 90%. If more current is needed, please refer to Figure 4 for recommendations.

Figure 4 shows the detailed parameters:

Introduction of portable beauty/health massage instrument and TI low-power solution
Figure Four

3. Step-down chip

TPS62840 is a high-efficiency step-down converter with a typical ultra-low operating quiescent current of 60nA. TPS62840 can achieve an IQ of only 120nA in 100% mode, so it can further extend battery life at the end of discharge. The TPS6274X series has a low quiescent current of 360nA and an output current of 300mA or 400mA. If you have requirements for volume, you can consider the TPS82740 power module, integrated Inductor, and a package of 2.3 x 2.9 mm can save PCB layout area.

Figure 5 shows the detailed parameters:

Introduction of portable beauty/health massage instrument and TI low-power solution
Figure Five

4. Linear Regulator

There are 4 types of linear regulators on beauty instruments and health massage instruments: ultra-low quiescent current, low noise current less than 1A, low noise current greater than 1A, and general-purpose LDO. The following table distinguishes different types of LDOs in terms of time. The left one is the earlier LDO, the middle one is the LDO launched in recent years, and the right one is the LDO launched around 2021. LDOs can be selected according to different needs.

Figure 6 is the detailed material number:

Introduction of portable beauty/health massage instrument and TI low-power solution
Figure Six

5. Motor drive

DRV8210 is a motor driver newly released by TI last year. The WSON package is compatible with the classic DRV8837 pin. In addition, a small SOT563 package is made separately, which supports a maximum current of 1.76A. This motor driver is also very simple in peripherals, and only a few are required. The filter capacitor will do. In addition, if the current is not enough, you can choose the pin-compatible DRV8212 to support 4A current.

Figure 7 shows the detailed parameters:

Introduction of portable beauty/health massage instrument and TI low-power solution
Figure Seven

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