Premium Thermoelectric Cooling Chip | High Efficiency Mobile Phone Heat Dissipation Solution

Nowadays, the processors of all mainstream brand mobile phones deliver powerful performance. Major mobile phone manufacturers have invested heavily in mobile phone heat dissipation technologies and hardware, adopting a variety of internal and external heat dissipation solutions such as VC vapor chambers, thermal conductive patches, copper foils, and graphene. These solutions enable mobile phones to meet the high computing power demands of scenarios including app launching, high-definition photography, online gaming, long-duration video calls, and frequent app switching, delivering a smooth daily user experience.

Heat Dissipation Methods for Mobile Phone Hardware

Currently, there are three mainstream heat dissipation solutions applied to mobile phone cooling back clips: thermoelectric cooling, air cooling, and water cooling. Among them, thermoelectric cooling and air cooling are widely used, with thermoelectric cooling dominating the market. Water cooling is mostly a DIY solution for tech enthusiasts and will not be elaborated on in this article.

Air cooling reduces mobile phone temperature via a fan or a combination of a fan and heat sink. It is suitable for low-load usage scenarios, featuring a simple structure and light weight, which avoids hand fatigue during long-time holding. In contrast, thermoelectric cooling is the mainstream solution. The core component of thermoelectric cooling is the cooling wafer, which consists of numerous paired square PN junction pillars.

When powered on, electron-hole pairs are generated near the upper contacts, reducing internal energy and temperature to absorb heat from the external environment, forming the cold end. At the opposite end, the recombination of electron-hole pairs increases internal energy and temperature, releasing heat to the environment and forming the hot end.

The cold end of the wafer fits closely to the heat-generating areas of the mobile phone to lower the local temperature, while the hot end is matched with a heat sink and fan to dissipate heat, thereby achieving effective heat control. Unlike air cooling, which can only cool devices down to near room temperature, the cold end of the thermoelectric cooling solution can reach freezing point, delivering a far more prominent cooling effect.

In addition to heat dissipation, the cooling back clip supports multi-functional expansion for mobile phones. A row of contacts is arranged on the inner edge of its bottom, which connects with the side contacts of the mobile phone after installation. This enables the cooling back clip to provide two additional physical keys for the mobile phone and enhance operational flexibility. A retractable bracket is built on the back, which can be pulled out to support the mobile phone in a horizontal placement on the desktop.

As introduced above, thermoelectric cooling is the mainstream solution for mobile phone cooling back clips. It is evident that regardless of the premium appearance and materials of the cooling back clip, the thermoelectric cooling chip remains its core component. The service life and performance stability of the thermoelectric cooling chip directly determine the overall performance of mobile phone heat dissipation products.

Main Characteristics and Parameters of Cooling Chips from Huajing Co., Ltd.

Product Characteristics

1. Compliant with EU RoHS standards

2. Recommended operating temperature: below 100°C

3. Ceramic material: Alumina

4. Parallel installation improves heat conversion capacity; stacked installation increases temperature difference

5. No moving parts, high reliability and maintenance-free

6. Small size and light weight

7. Low operating noise and low electromagnetic interference

8. Customizable sealant, terminal connectors, power cables and cable length

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