LM2596 ACAV Battery Charge Module

LM2596 ACAV Power Supply Battery Charge Module ( Steps Voltage Down )

Adjustable Current and Voltage DC DC Converter 35V 3A

        It is a power supply module with adjustable voltage and current. It is a ready made circuit whose output voltage can be adjusted very precisely (for example 5.05V) between 3V and 33V. The input voltage can be 35V at most. It has a 3A current sourcing capacity. Thanks to its very small dimensions, it is suitable for use in dc voltage conversion work in all kinds of circuits.

     It has a current control feature. With the maximum current level set by the pot on it, a constant current is provided at its output. Constant current is necessary for applications such as led drivers and battery charging. When the current level rises above certain limits, leds or batteries are damaged. For this reason, in this type of circuit the current must be used limited/fixed.

     In addition, there is also 1 charge adjustment pot to be used in battery charging operations. During the battery charging process, the current drawn from the source continues by decreasing. The charge pot allows you to set the level of the lowest charge current. When the charge current drops to this current, the Ok led showing that the battery is charged becomes active.

Features:

•     Input voltage: DC 7-35V
•     Output voltage: DC 3V-33V ( Attention = The input voltage must be 1.5V higher than the output. )
•     Output current: Maximum 3A ( Above 15W the use of a heatsink is mandatory. )
•     Efficiency: 92%
•     Switching frequency: 150 KHz
•     Constant current adjustment:  1% -  100%
•     Power indicator led.
•     Full charge indicator led
•     Constant current voltage indicator led
•     Voltage adjustment pot
•     Current adjustment pot
•     Charge adjustment pot
•     It can charge batteries in the 1.23V to 28V range.
•     It can be used as a led driver
•     Reverse connection protection
•     Output short circuit protection
•     Operating temperature: -20C / +85C
•     Dimensions: 48mm x 23mm x 14mm
•     Weight: 14gr

Leds:

• OK: Battery charging process completed.
• CH: Charging continues
• CC/CV: Constant current or voltage operation

Pot Usage:

• The pots are multi turn. They can turn 20-30 turns in both directions. Usually the mistake of turning very little and thinking the products do not work can be made. It is necessary to turn a lot to see the effect.
• Turning clockwise; Increases the value for the relevant parameter. For example the voltage increases.
• Turning counterclockwise; Decreases the value for the relevant parameter. For example the voltage drops.

Battery Charge Usage Settings:

•     Remember that in the city mains there is continuously enough energy to charge any battery you use in 1 second. Nevertheless we charge these devices over long periods.
•     When batteries are depleted their voltages are at low levels. If you connect a battery directly to a power supply without current limiting while it is being charged, it charges with the maximum current the source can give. This situation damages the battery. The battery can explode due to excessive heating. In addition, if batteries are charged with a current higher than the current determined by the manufacturer, the battery life decreases. As an example, a battery that can be charged and discharged 500 times in total will become unusable after a much lower number of uses. For this reason batteries must be charged with a charge current at a ratio such as 1/10  2/10 of their current capacities.
•     Calculate / determine / find out the charge voltage and charge current required for the battery to be charged.
•     Current adjustment: Set the output voltage to 5V. Set the voltmeter as an ammeter and connect the probes to the module output. The device will be short circuited through the ammeter. At this stage, seeing the current on the ammeter, adjust it to the required current value with the current adjustment pot.
•     Then disconnect the voltmeter from the module. By bringing it to the voltage you want with the module voltage pot, you can use it with the output current you determined in the previous stage.

LED Driver Usage Settings:

•     Before using the module, calculate / determine / find out the led driving voltage and current.
•     Current adjustment: Set the output voltage to 5V. Set the voltmeter as an ammeter and connect the probes to the module output. The device will be short circuited through the ammeter. At this stage, seeing the current on the ammeter, adjust it to the required current value with the current adjustment pot.
•     Then disconnect the voltmeter from the module. By bringing it to the voltage you want with the module voltage pot, you can use it with the output current you determined in the previous stage.

Package Contents:

• 1 Piece LM2596S ACAV Battery Charge Module