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New 2.5A Backup Power Manager for Li-Ion Battery Backup Systems
Linear Technology Release the LTC4040 with a Bi-Directional Sysnchronous Converter for High Efficiency Battery Charging
Linear Technology Corporation has released the new LTC4040, a complete lithium battery backup power management system for
3.5V to 5V supply rails that must be kept active during a main power failure.
Batteries provide considerably more energy than supercapacitors,
making them superior for applications which require backup for extended periods of time.
The LTC4040 uses an on-chip bidirectional synchronous converter to
provide high efficiency battery charging as well as high current, high efficiency backup power.
When external power is available, the device operates as a step-down battery charger for single-cell
Li-Ion or LiFePO4 batteries while giving preference to the system load.
When the input supply drops below the adjustable Power-Fail Input (PFI)
threshold the LTC4040 operates as a step-up regulator capable of delivering up to 2.5A to the system output from
the backup battery. During a power fail event, the device's PowerPath™ control provides reverse blocking and a
seamless switchover between input power and backup power. Typical applications for the LTC4040 include fleet
and asset tracking, automotive GPS data loggers, automotive telematics systems, toll collection systems, security
systems, communications systems, industrial backup and USB-powered devices.
Key Features of the LTC4040
The company's Web site address is www.linear.com.
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