Wednesday, May 6, 2015

Circuit Diagram Lead Acid Battery Charger for GEL-TYPE Batteries Based on the LM350 IC

Robotronicdiagram. - There are many electronic circuit diagram that developing to give the best battery charger. One of the lead acid battery charger circuit diagram is like in figure 1 below. This is circuit diagram lead acid battery charger that recommended for GEL-Type batteries since it draws to much current. 

In this article beside we will show you circuit diagram of  Lead Acid Battery Charger for GEL-TYPE Batteries Based on the LM350 IC, we also will describe this circuit diagram globally for you.

Circuit Diagram

Figure 1. Circuit Diagram Lead Acid Battery Charger for GEL-TYPE Batteries Based on the LM350 IC
Component Parts
  1. The main component is LM350 IC
  2. Other component like in figure 1 above

Circuit diagram like in figure 1 above is Circuit Diagram Lead Acid Battery Charger for GEL-TYPE Batteries Based on the LM350 IC. So, the main component to adjust the output voltage is LM350 IC. This circuit diagram is perfect to 'constant-charge' a 12-Volt Lead-Acid Battery and recommended for GEL-Type Batteries. Beside that this circuit diagram also can be used as a normal Battery Charger. 

This circuit diagram using negative temperature coefficient in temperature sensor and also can give  a precision voltage source. This is give us the meaning that the voltage will automatically decrease whenever the surrounding or battery temperature increases. Temperature coefficient for this circuit diagram is -8mV per °Celcius. A temperature sensor in this circuit diagram is using a normal transistor (Q1).

How it is work?

Electronic-Lab blog describe about how this circuit work as like that this Battery Charger is centered around adjustable stabilizer IC, the LM350 integrated, 3-amp. P1 can be used to adjust output voltage with between 13.5 and 14.5 volt. T2 was added to prevent battery discharge via R1 if no power present. R4's value can be adjusted to accommodate a bit larger or smaller window. D1 is a large power-diode, 100V PRV @ 3 amp. Bigger is best but I don't recommend going smaller. 

The LM350's 'adjust' pin will try to keep the voltage drop between its pin and the output pin at a constant value of 1.25V. So there is a constant current flow through R1. Q1 act here as a temperature sensor with the help of components P1/R3/R4 who more or less control the base of Q1. 

Since the emitter/base connection of Q1, just like any other semiconductor, contains a temperature coλficient of -2mV/°C, the output voltage will also show a negative temperature coλficient. That one is only a factor of 4 larger, because of the variation of the emitter/basis of Q1 multiplied by the division factor of P1/R3/R4. 

Which results in approximately -8mV/°C. To prevent that sensor Q1 is warmed up by its own current draw, we recommend adding a cooling rib of sorts. (If you wish to compensate for the battery-temperature itself, then Q1 should be mounted as close on the battery as possible) The red led (D2) indicates the presence of input power.Depending on what type of transistor you use for Q1, the pads on the circuit board may not fit exactly (in case of the BD140).


Special offer for you to download electronic software this day is OrAD PSpice Version 9.2 Full for Windows.

  •  OrAD PSpice Version 9.2 Full for Windows [Link]

Thank you for your coming here in, we hope the article above will help you to know more about your information in electronic circuit design and other in this time. Please comment here when you want to share and other. Thank you.


Post a Comment

Let's share your idea with comment here