The LTC400-1 is a high voltage controller and power manager with input maximum power point control (MPPC) that converts virtually any externally compensated DC/DC power supply into a full-featured battery charger. This controller is capable of driving typical DC/DC converter topologies, including buck, boost, buck-boost, SEPIC, flyback and forward. The device offers precision input current monitoring and charge current monitoring and regulation. It operates across a wide 3V to 60V input and output voltage range, compatible with a variety of different input voltage sources, battery stacks and chemistries including lithium-ion/polymer/phosphate, sealed lead acid (SLA) and nickel-based. The LTC4000-1's MPPC circuit features an input voltage regulation loop that controls charge current to maintain the input voltage at a programmed level, ideal for solar panels or other high impedance sources. Applications include: high power battery charger systems, high performance portable instruments, battery backup systems, and industrial or military battery-equipped devices.The LTC4000-1 features an intelligent PowerPath topology that preferentially provides power to the system load when input power is limited. It controls external PFETs to provide low loss reverse current protection, efficient charging and discharging of the battery, and instant-on operation to ensure that system power is available at plug-in, even with a deeply discharged battery. External sense resistors and precision sensing ensure accurate currents at high efficiency, allowing operation with converters that span a wide power range. The LTC4000-1 is housed in low profile (0.75mm) 28-pin 4mm x 5mm QFN and 28-lead SSOP packages and is guaranteed for operation from -40°C to 125°C. 1,000-piece pricing starts at $3.95 each.
