The MAX1501ZETE+ is a highly integrated, linear battery charger with thermal regulation for portable applications in 16 pin TQFN package. The MAX1501 intelligent, constant-current, constant voltage (CCCV), temperature regulated battery charger charges a single lithium-ion (Li+) cell or three-cell NiMH/NiCd batteries. The device integrates the current sense resistor, PMOS pass element and thermal regulation circuitry, while eliminating the reverse blocking Schottky diode. For single-cell Li+ batteries, the MAX1501 functions as a stand-alone charger to control the charging sequence from the prequalification state through fast charge, top off and charge termination. With 3-cell NiMH/NiCd batteries, the MAX1501 requires collaboration with a microcontroller to determine the best charging algorithm. Thermal-regulation circuitry limits the die temperature when fast charging or while exposed to high ambient temperatures, allowing maximum charging current without damaging the charger.
● Supply voltage range is 4.5V to 13V
● Operating temperature range from -40°C to 85°C
● No FET, reverse-blocking diode, or current sense resistor required
● Programmable fast-charge current is 1.4A (max)
● Input overvoltage (OVLO) protection above 6.5V
● Programmable top-off current threshold is 10%, 20%, or 30% of fast-charge current
● Charge-current monitor for fuel gauging
● Programmable safety timer (3, 4.5, or 6 hours)
● Input power detection output and charge enable input
● Automatic recharge
