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New Complete Lithium-Ion Battery Backup Solution from Linear Technology
The LTC4091 provides a seamless transfer from Primary Power Source to Battery Back-up
Analog Devices announces the release of the LTC4091, a complete lithium-ion battery backup management system
for 3.45V to 4.45V supply rails that must be kept active during a long duration main power failure.
The LTC4091 employs a 36V monolithic buck converter with adaptive output control to
provide power to a system load and enable high efficiency battery charging from the buck output.
When external power is available, the device can provide up to 2.5A of total output current and
up to 1.5A of charge current for single-cell 4.1V or 4.2V Li-Ion batteries.
If the primary input source fails and can no longer power the load, the LTC4091 provides
up to 4A to the system output load from the backup Li-Ion battery via an internal ideal diode,
and unlimited current if an external ideal diode transistor is used.
To protect sensitive downstream loads, the maximum output load voltage is 4.45V.
The device’s PowerPath™ control provides a seamless switchover between input power and
backup power during a power fail event, and enables reverse blocking with a shorted input.
Typical applications for the LTC4091 include fleet and asset tracking,
automotive GPS data loggers and telematics systems, security systems, communications and industrial backup systems.
Key Features of the LTC4091
The company's Web site address is www.linear.com.
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