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Linear Technology Release New Standalone Charge Balancing IC for 12V Lead Acid Batteries
Charge is Transferred from High Voltage Batteries to Lower Voltage Batteries to Ensure all are Charged Equally
Linear Technology Corporation has released the new LTC3305, a single IC, standalone
multicell battery balancer for 12V lead acid batteries. Balancing works by absorbing charge from higher
voltage batteries and transferring that charge to lower voltage batteries so that all are charged equally. Charge is
transferred using a lower capacity battery that is sequentially connected across the batteries in the stack. Not only
does this battery transfer charge, but the energy in the transfer battery adds to the total energy in the stack, thus
increasing capacity. Included on the chip is sequencing, drive circuitry for high voltage external NFETs, voltage
monitoring and protection. The LTC3305 is designed for standalone operation and does not require a
microprocessor or other control circuitry. With the LTC3305, one battery in the stack can be replaced and quickly
balanced to the remaining batteries. The LTC3305 is ideal for applications such as telecom backup systems, home batterypowered
backup systems, electric vehicles and industrial lighting systems.
Key Features of the LTC3305
The company's Web site address is www.linear.com.
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