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Tuesday 12 April 2011

12V Battery Charger


















This circuit ¡s a high-performance charger for gelled-electrolyte lead-acid batteries. This charger
quickly recharges the battery and shuts off at full charge. Initially, charging current is limited to 2 A. As the
battery voltage rises, current to the battery decreases, and when the current has decreased to 150 mA,
the charger switches to a lower float voltage, which prevents overcharge. When the start switch is pushed,
the output of the charger goes to 14.5 V. As the battery approaches full charge, the charging current
decreases and the output voltage is reduced from 14.5 V to about 12.5 V, terminating the charging. Transistor Q1 then lights the LED as a visual indication of full charge.

2 comments:

  1. Hi,
    can i use a LM317 instead of this LM 350. ?, I have a 12v 7Ah Lead acid battery. My power supply is 20v 1A. And i have a UA 741 op-amp. can i replace this LM301A with UA741 ?.

    ReplyDelete
  2. Hi,
    can i use a LM317 instead of this LM 350. ?, I have a 12v 7Ah Lead acid battery. My power supply is 20v 1A. And i have a UA 741 op-amp. can i replace this LM301A with UA741 ?.

    ReplyDelete