DC1614A

DC1614A demonstration circuit features the LTC4012CUF, a multi-chemistry single battery charger controller with PowerPath™ control. The input supply voltage is 13.5V to 20V and is initially configured for a current limit of 10A. The charger float voltage is programmed by jumpers to support 1- to 4- series cells of both Li-Ion/Polymer and Li-iron phosphate (LiFePO4) at 4.2V/cell and 3.6V/cell, for a total of eight settings. The demo board is initially configured for constant-voltage charging of a 12.6V Li-Ion/polymer battery and constant-current charging at 8A, though current derating may be necessary due to certain operating conditions. DC1614 features an optional circuit for sealed lead acid (SLA) batteries for constant-voltage charging with temperature compensation and fast/float voltage toggling. DC1614 also features layout for extra components and external gate drivers for improved efficiency at higher charge currents.

• Demo board is capable of supporting the LTC4012 and LTC4012-3 with a simple IC swap-out
• 10ADC ±4% input current limit at set by R1 (100mV/R1)
• 12.6V ±1% default float voltage VBAT at jumper selectable: 4.2V/cell or 3.6V/cell
• 8ADC ±5% maximum charge current at VIN > VBAT