Solar Charger Ic Lt3652

We have used an 18w solar panel set the charging current 2a.

Solar charger ic lt3652. The smd leds are fully safeguarded thermally and from over current using an inexpensive lm 338. The charger employs a 3 3v float voltage feedback reference. Lt3652hv demo circuit wall adapter to 5 cell lifepo4 battery charger 19 32v to 18vfloat 1 5a models for the following parts are available in ltspice. I have designed a solar charger using lt3652 to charge the lithiumion battery.

The lt3652 employs an input voltage regulation loop that reduces the charge current if the input voltage falls below a programmed level set by a simple voltage divider network. Meeting this need is linear technology s lt3652 monolithic buck charger ic which operates with a single solar panel. Charger for solar power the lt 3652 is a complete monolithic step down bat tery charger that operates over a 4 95v to 32v input voltage range. 3 solar charger and driver circuit for 10w 20w 30w 50w white high power smd led.

The lt3652 can be configured to terminate charging when charge current falls below 1 10 of the programmed maximum c 10. Linear technology has released the the lt3652 an innovative solar power directed monolithic buck battery charger ic for modern battery chemistries. Designs can be imported into altium designer. The lt3652 provides a constant current constant voltage charge characteristic with maximum charge current externally programmable up to 2a.

When the lt3652 is powered by a solar panel the input regulation loop is used to maintain the panel at peak output power. As soon as the voltage reached below 5v the voltage on vin reg dropped below 2 7v and ic stopped charging. The lt3652 provides a constant current constant voltage charge characteristic with maximum charge current externally programmable up to 2a. A pdf version of the schematic can be obtained here.

The ic uses average current mode control loop architecture to provide constant current constant voltage cc cv charge characteristics. The system worked as expected until this point. Started increasing voltage from 5v to 8 9. Circuit maker is a free pcb design tool from altium.

Once charging is terminated the lt3652 enters a low current 85μa standby mode. Charger for solar power the lt 3652 is a complete monolithic step down bat tery charger that operates over a 4 95v to 32v input voltage range. The charger employs a 3 3v fl oat voltage feedback reference. The 3rd idea teaches us how to build a simple solar led with battery charger circuit for illuminating high power led smd lights in the order of 10 watt to 50 watt.

For long periods of time requiring a charger that can properly operate a solar panel.