Appreciation of CN3068, the most suitable USB charging circuit

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Appreciation of CN3068, the most suitable USB charging circuit [Copy link]

      CN3068 datasheet 紫潮-CN3068.pdf (368.97 KB, downloads: 83)

2018-10-11 10:39 上传

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High efficiency, USB compatible charging management circuit

wodeni1029

Good stuff, let's learn from it...

qwe525667597

The NTC calculation of CN3068 is here. Please download it yourself and reply to the discussion.

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Push the post yourself

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4A Single Cell Lithium Battery Charge Management Integrated Circuit CN3001 Overview: CN3001 is a PWM step-down mode single cell lithium battery charge management integrated circuit, which independently controls the charging of a single cell lithium battery, and has the advantages of small package size, few peripheral components and simple use. CN3001 has trickle, constant current, and constant voltage charging modes, which is very suitable for lithium battery charge management. In constant voltage charging mode, CN3001 modulates the battery voltage at 4.2V, which can also be set by an external resistor. For deeply discharged lithium batteries, when the battery voltage is lower than 66.5% (typical value) of the constant voltage charging voltage, CN3001 uses 17.5% of the set constant current charging current to trickle charge the battery. In the constant voltage charging stage, the charging current gradually decreases, and when the charging current drops to 16% of the constant current charging current, the charging ends. At the end of charging, if the battery voltage drops to 95.5% of the constant voltage charging voltage, a new charging cycle automatically starts. When the input power is off or the input voltage is lower than the battery voltage, CN3001 automatically enters sleep mode. Features: - Wide input voltage range: 4.5V to 28V - Complete charge management for single-cell lithium batteries - Charging current up to 4A - PWM switching frequency: 300KHz - Constant voltage charging voltage can be adjusted upward by resistors - Constant voltage charging voltage accuracy: ±1% - Constant current charging current is set by external resistors - Trickle charging for deeply discharged batteries - Automatic recharge function - Charging status and charging end status indication - Soft start function - Battery terminal overvoltage protection - Operating ambient temperature: -40℃ to +85℃

luck_gfb

Study

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If you need detailed information and samples, please leave your email and I will send them to you.

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  4A three-cell lithium battery charging management integrated circuit - CN3763 Overview: CN3763 is a PWM step-down mode three-cell lithium battery charging management integrated circuit, which independently manages the charging of three lithium batteries. It has the advantages of small package size, few peripheral components and simple use. CN3763 has trickle current, constant current and constant voltage charging modes, which is very suitable for lithium battery charging management. In constant voltage charging mode, CN3763 keeps the battery voltage at 12.6V, which can also be set by an external resistor. Features: Wide input voltage range: 6.6V to 30V Complete charging management for three lithium batteries Charging current can reach 4A PWM switching frequency: 300KHz Constant voltage charging voltage can be adjusted upward with resistor

姚枫

Americans are very good at this!

qwqwqw2088

Yao Feng posted on 2018-12-5 15:59 Americans are very good at this!

The chip on the OP's website is a domestically produced charging chip from Shanghai Ruyun.

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  5A three-cell lithium battery charging management integrated circuit CN3703 Overview: CN3703 is a PWM step-down mode three-cell lithium battery charging management integrated circuit. It can automatically manage the charging of three lithium batteries independently. It has the advantages of small package size, few peripheral components and simple use. CN3703 has constant current and constant voltage charging modes, which is very suitable for charging lithium batteries. In constant voltage charging mode, CN3703 modulates the battery voltage at 12.6V with an accuracy of ±1%; in constant current charging mode, the charging current is set by an external resistor. For deeply discharged lithium batteries, when the battery voltage is lower than 8.4V, CN3703 uses 15% of the set constant current charging current to trickle charge the battery. In the constant voltage charging stage, the charging current gradually decreases, and when the charging current drops to the value set by the external resistor, the charging ends. At the end of charging, if the battery voltage drops to 12V, a new charging cycle will automatically start. When the input power is off or the input voltage is lower than the battery voltage, CN3703 automatically enters sleep mode. Features: - Wide input voltage range: 7.5V to 28V - Complete charge management for three lithium batteries - Charging current up to 5A - PWM switching frequency: 300KHz - Constant voltage charging voltage accuracy: ±1% - Constant current charging current set by external resistor - Trickle charging for deeply discharged batteries - End-of-charge current can be set by external resistor - Battery temperature monitoring function - Automatic recharge function - Charging status and charge end status indication