SF6026 - pulser for car batteries and other lead acid batteries for a longer economic life-time
The circuit with a SF6026 generates discharge pulses for lead acid batteries to prevent sulfation. The output pin of the SF6026 is connected to a power fet (BUZ100). This transistor has a very low resistance between drain and source (RDSon = 0.018). For a very short time (circa 6 μs), the fet discharged the battery with a very high current (up to 100A). The interval (pulse-duty factor) is 4 ms. That means, the fet is switched on for only 0.15% of the time. That's why the current of the complete circuit is only 0.2A. But the pulser is working only down to 12.5 volt. The LED indicates that the puls discharging occurs. When the pulser is switched off (below 12.5 volts), the current of the complete circuit is less than 1 mA. Please, keep your battery whenever possible in the loaded condition.
During normal operation of a car battery, the car pulser is always in operation. This is because periodically car driving loads the battery of more than 12.5 volts. In mobile homes or stationary systems, the batteries can have a low charging level. Then at least every 8 weeks the battery should be loaded manually. 
 

Schaltung-SF6026

 

order mail to SFChip@SFChip.de