DC1721B-B

DC1721B-B demonstration circuit features LTC4000-1, 14.6V, 5A battery charger and PowerPath™ manager with 6VIN to 36VIN buck-boost converter. The output of this demo board was specifically tailored for a Tenergy 10A-hour battery, P/N 30207. Other voltages can be set by changing ROFB2 and RBFB2. The desired nominal voltage can be accurately trimmed by using trim resistors R42 and R43. For example, for 14.4V battery float voltage, change ROFB2 and RBFB2 to 86.6K, add 7.5M at R42 and R43 for greater set point accuracy. This circuit was designed to demonstrate high levels of performance, efficiency, small solution size attainable using this ICs in buck-boost converter battery charger, intelligent PowerPath manager, and power supply. It operates at 400KHz and produces a regulated 5A/14.6V battery charger output as well as a system output of up to 6.25A from an input voltage range of 6V to 36V. Suitable for a instruments, industrial equipment, power tools, and computers applications.

• LTC4000-1 instead has an input voltage regulation loop for maximum power point (MPP) control
• 50mVP-P typ system output ripple at VIN = 24V, IOUT-SYS = 5A (20MHz BW)
• 96.5% max system output efficiency at VIN = 24V, IOUT-SYS = 5A