01 About RTC clock chip
RTC (Real_Time Clock) is called “clock chip”. Its interrupt function can wake up the devices in the network at regular intervals, so that other modules of the device can sleep most of the time, thereby greatly reducing the overall power consumption of the device.
At present, RTC is widely used in security monitoring, industrial equipment, smart meters, cameras, 3C products, photovoltaics, commercial display screens, home appliance control panels, temperature control and other related fields.
When the device is powered off or replaced, the backup battery/capacitor can provide backup current for the clock chip on the host to ensure the normal operation of RTC.
02 Supercapacitor VS CR Button Battery
The mainstream backup power product used by RTC clock chips on the market is CR button batteries. In order to minimize the impact of poor customer experience caused by the exhaustion of CR button batteries and the failure to replace them in time, and to help RTC perform its performance more sustainably and safely, YMIN deeply explored the pain points and demands of products equipped with RTC clock chips, and conducted tests on the usage characteristics of RTC. By comparison, it was found that YMIN supercapacitors (button type, module type, lithium-ion capacitors) showed better characteristics than CR button batteries in the actual application of matching RTC, and could more effectively help upgrade RTC solutions.
| CR Button Battery | Supercapacitor |
| CR button batteries are usually installed inside the device. When the battery is low, it is very inconvenient to replace it. This will cause the clock to lose memory. When the device is restarted, the clock data on the device will be confused. | No need to replace, lifelong maintenance-free to ensure effective data storage |
| The temperature range is narrow, generally between -20℃ and 60℃ | Good temperature characteristics from -40 to +85°C |
| There are safety hazards of explosion and fire | The material is safe, non-explosive and non-flammable |
| Generally lifespan is 2~3 years | Long cycle life, up to 100,000 to 500,000 times or more |
| The material is contaminated | Green energy (activated carbon), no pollution to the environment |
| Products with batteries require transportation certification | Battery-free products, capacitors do not require certification |
03 Series Selection
YMIN supercapacitors (button type, module type, lithium-ion capacitors) can achieve long-term stable power supply, and have the advantages of excellent data storage stability, excellent high and low temperature resistance, safe material properties and ultra-long cycle life. They still maintain a low resistance state during the use of the equipment, and are a reliable guarantee for RTC.
| Type | Series | Volt(V) | Capacity(F) | Temperature(℃) | Lifespan(Hrs) |
| Button Type | SNC | 5.5 | 0.1-1.5 | -40~+70 | 1000 |
| SNV | 5.5 | 0.1-1.5 | 1000 | ||
| SNH | 5.5 | 0.1-1.5 | 1000 | ||
| STC | 5.5 | 0.22-1 | -40~+85 | 1000 | |
| STV | 5.5 | 0.22-1 | 1000 | ||
| Type | Series | Volt(V) | Capacity(F) | Dimension(mm) | ESR(mΩ） |
| Module Type | SDM | 5.5 | 0.1 | 10x5x12 | 1200 |
| 0.22 | 10x5x12 | 800 | |||
| 0.33 | 13×6.3×12 | 800 | |||
| 0.47 | 13×6.3×12 | 600 | |||
| 0.47 | 16x8x14 | 400 | |||
| 1 | 16x8x18 | 240 | |||
| 1.5 | 16x8x22 | 200 | |||
| lithium-ion capacitors | SLX | 3.8 | 1.5 | 3.55×7 | 8000 |
| 3 | 4×9 | 5000 | |||
| 3 | 6.3×5 | 5000 | |||
| 4 | 4×12 | 4000 | |||
| 5 | 5×11 | 2000 | |||
| 10 | 6.3×11 | 1500 |
The above selection recommendations can help RTC achieve a better operating state. Compared with similar products on the market, YMIN supercapacitors are a better choice to protect RTCs, replacing international high-end counterparts and becoming the mainstream RTC capacitor. All solution providers are welcome to consult the detailed information of YMIN supercapacitor products. We will have specialized technicians to solve your problems for you.
With the upgrading and development of products in various industries in the new era, YMIN realizes new requirements and new breakthroughs through new applications and new solutions, supports the innovative application of customer products, ensures the stable operation of customer products, eliminates hidden dangers in the use of customer products, and guarantees the user experience of customer products.
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Post time: Aug-07-2024