Reference design of true wireless earphone charging box with ultra-low standby power consumption![]() Wireless earphones have been popular in the market for more than 10 years, and the trend of replacing wired earphones is very obvious. However, most traditional wireless earphones only separate the earphones from the adapter devices (such as mobile phones, computers, etc.). However, cables are still needed to connect the two earplugs to achieve signal consistency and reduce design costs. This greatly reduces the user's comfort and sharply reduces the ornamental value of the earphones! Especially for earphones used for leisure and sports, this design also increases the risk of personal injury caused by cable entanglement to a certain extent. 〉〉〉Click to view details It's time to say goodbye to discrete solutions for automotive lighting! ![]() Major automakers are using light-emitting diodes (LEDs) extensively, in addition to traditional headlights, taillights, daytime running lights, parking lights and turn signals, to make their cars stand out in the market. Currently, LEDs are found in clearance lights, license plates, brand logos, welcome lights and ambient lights. 〉〉〉Click to view details TPS2376H output is abnormal, only 5V, I don't know why As shown in the circuit, the RJ45 plus network transformer plus TPS2376H are used for power supply, but after the network cable is inserted, the output voltage of the VDD end is 5V, the VSS pin is -45V, the RTN pin is grounded, and the circuit has no current output. After changing RILIM from 1M to 330K, the circuit can output current but the voltage output to DC is still only 5V. After changing RILIM from 330K to 10K, the VDD output voltage jumps between 5V-50V, and the network transformer has a large current sound. I would like to ask why this chip has such a problem, and whether the matching resistor or capacitor is not set correctly. 〉〉〉Click to view details BQ25895M USB port usage problem [img]https://e2echina.ti.When BQ25895M is in use, when the USB physical interface is connected to the D+ and D- of BQ25895M and the USB D+/D- of MCU at the same time, after the charging detection is completed, will BQ25895M disconnect its own D+/D- interface (i.e. pins 2/3)? 〉〉〉Click to view details TPS40210 test results do not match the design ![]() Several problems were found during the actual debugging process: 1. The output voltage is not 48V, but around 28-30V. 2. The measured VFB voltage is around 0.45V, not 0.7V as stated in the manual 3. Two CSD18543Q3A in the design were broken inexplicably during the test process. The actual test power supply is 12V, no load, and the 12V current is sufficient. The actual parameters C5 is 2.2uF, R5 is 9.1R, R4, R7 are not soldered, and the others are the same as the design schematic. We use BQ25606 to charge lithium batteries. In order to test reliability, customers over-discharge lithium batteries to below 1V or even 0V, and then use BQ25606 to charge the over-discharged lithium batteries. At this time, BQ25606 will become hot and eventually burn out. What is the cause of this phenomenon? How to avoid this failure phenomenon? Thank you. 〉〉〉Click to view details com/question_answer/analog/battery_management/f/35/t/156420]〉〉〉Click to view details[/url] TPS40210 test results do not match the design ![]() Several problems were found during the actual debugging process: 1. The output voltage is not 48V, but around 28-30V. 2. The measured VFB voltage is around 0.45V, not 0.7V as stated in the manual 3. Two CSD18543Q3A in the design were broken inexplicably during the test process. The actual test power supply is 12V, no load, and the 12V current is sufficient. The actual parameters C5 is 2.2uF, R5 is 9.1R, R4, R7 are not soldered, and the others are the same as the design schematic. We use BQ25606 to charge lithium batteries. In order to test reliability, customers over-discharge lithium batteries to below 1V or even 0V, and then use BQ25606 to charge the over-discharged lithium batteries. At this time, BQ25606 will become hot and eventually burn out. What is the cause of this phenomenon? How to avoid this failure phenomenon? Thank you. 〉〉〉Click to view details com/question_answer/analog/battery_management/f/35/t/156420]〉〉〉Click to view details[/url] TPS40210 test results do not match the design ![]() Several problems were found during the actual debugging process: 1. The output voltage is not 48V, but around 28-30V. 2. The measured VFB voltage is around 0.45V, not 0.7V as stated in the manual 3. Two CSD18543Q3A in the design were broken inexplicably during the test process. The actual test power supply is 12V, no load, and the 12V current is sufficient. The actual parameters C5 is 2.2uF, R5 is 9.1R, R4, R7 are not soldered, and the others are the same as the design schematic. We use BQ25606 to charge lithium batteries. In order to test reliability, customers over-discharge lithium batteries to below 1V or even 0V, and then use BQ25606 to charge the over-discharged lithium batteries. At this time, BQ25606 will become hot and eventually burn out. What is the cause of this phenomenon? How to avoid this failure phenomenon? Thank you. 〉〉〉Click to view details png[/img] Several problems were found during the actual debugging process: 1. The output voltage is not 48V, but around 28-30V. 2. The measured VFB voltage is about 0.45V, not 0.7V as stated in the manual 3. Two CSD18543Q3A in the design were broken inexplicably during the test. The actual test power supply is 12V, no load, and the 12V current is sufficient. The actual parameters C5 is 2.2uF, R5 is 9.1R, R4, R7 are not welded, and the others are the same as the design schematic. We use BQ25606 to charge lithium batteries. In order to test reliability, customers over-discharge lithium batteries to below 1V or even 0V, and then use BQ25606 to charge the over-discharged lithium batteries. At this time, BQ25606 will become hot and eventually burn out. What is the cause of this phenomenon? How to avoid this failure phenomenon? Thank you. 〉〉〉Click to view details png[/img] Several problems were found during the actual debugging process: 1. The output voltage is not 48V, but around 28-30V. 2. The measured VFB voltage is about 0.45V, not 0.7V as stated in the manual 3. Two CSD18543Q3A in the design were broken inexplicably during the test. The actual test power supply is 12V, no load, and the 12V current is sufficient. The actual parameters C5 is 2.2uF, R5 is 9.1R, R4, R7 are not welded, and the others are the same as the design schematic. We use BQ25606 to charge lithium batteries. In order to test reliability, customers over-discharge lithium batteries to below 1V or even 0V, and then use BQ25606 to charge the over-discharged lithium batteries. At this time, BQ25606 will become hot and eventually burn out. What is the cause of this phenomenon? How to avoid this failure phenomenon? Thank you. 〉〉〉Click to view details com/question_answer/analog/battery_management/f/35/t/156373]〉〉〉Click to view details[/url] com/question_answer/analog/battery_management/f/35/t/156373]〉〉〉Click to view details[/url]
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