Power Management Solutions for True Wireless Stereo Earbuds
What is the role of quiescent current in Li-ion battery applications? What Richtek power solutions with ultra-low quiescent current can be found in TWS earbuds on the market? We will introduce our products with key features from a component teardown report of TWS earbuds. You can also find why Richtek products are superior to other IC suppliers’ in the comparison table.
▸ Featured products mentioned in the video:
| RT6160A |
3A, 2.2V~5.5Vin, 2.025V~5.2Vout, Buck-Boost converter, featuring 1µA quiescent current. |
See RT6160A |
| RT5707/A |
0.4A/0.6A, 2.2V~5.5Vin, 1.2V~3.3Vout, HCOT Buck converters, featuring 360nA quiescent current. |
See RT5707/A |
| RT9471/D |
3A, 3.9V~13.5Vin, 4.7V(max) battery charge voltage, single cell switching battery charger. (RT9471 with the status indicator) |
See RT9471/D |
| RT9525 |
1.2A, 4.2V~6Vin, 4.2V(max) battery charge voltage, linear single cell Li-ion battery charger with auto power path. |
See RT9525 |
Introducing Battery Fuel Gauges
What are the advantages and features of Richtek's battery fuel gauge? How did we find a solution to the challenges of SoC (State of Charge) accuracy of lithium-ion batteries? In the video, you will see the SoC test results of OPPO mobile phones, iPhones, and smart watches under high/low temperature, or 7 consecutive days of use. Can Richtek’s fuel gauge still maintain low error of SoC under different loads and temperatures with a high-capacity battery?
▸ Featured products mentioned in the video:
| RT9426A |
System-side single cell fuel gauge for single cell battery packs, featuring 14µA active current to extend battery life and accurate SoC report. |
See RT9426A |
| RT9422A |
Pack-side single cell fuel gauge for single cell battery packs, featuring 14µA active current for longer battery life and smooth SoC dynamic Behavior. |
See RT9422A |
Comprehensive Technical Support
You might wonder whether these battery cells can handle such high charging currents. We can assume that these cells are specially designed to have extremely low internal resistance, down to 1.2mΩ, so they don’t heat up so much under high charge or discharge currents.
Richtek Wearable Low Iq Total Solution-TWS