LB1983ALQFP32

LB1983 combines a precision analog front-end controller and Switch-Mode Power Supply (SMPS), Pulse Width Modulator (PWM) drivers to a single silicon platform for high-volume battery testing and formation manufacturing. Precision instrumentation amplifiers (in-amps) measure the battery charge/discharge current with better than ±0.1% accuracy, while equally precise differential amplifiers measure the battery voltage. Internal laser-trimmed resistor networks establish the gain for the instrumentation amplifier and differential amplifier (66V/V and 0.4V/V respectively), stabilizing LB1982 performance over the rated operating temperature range. Desired battery cycling current and voltage levels are established by applying precise control voltages to the ISET and VSET inputs. The actual charge and discharge current levels are sensed (typically through high-power, high-precision shunt resistors), with their values carefully optioned based on system parameters. The switch between Constant Current (CC) and Constant Voltage (CV) loops is instantaneous, automatic, and completely transparent to the observer. A logic high on the MODE input options the charge or discharge mode (high for charging, low for discharging). With a space-saving 7mm × 7mm × 1.4mm, 32-pin LQFP package, LB1982 simplifies design and offers superior performance, functionality, and overall reliability, rated for operation from -40°C to +85°C.