The LT3650EMSE-4.2#PBF is a High Voltage 2A Monolithic 2-cell Li-ion Battery Charger operates over a 4.75 to 32V input voltage range (7.5V minimum start-up voltage). The LT3650 provides a constant-current/constant-voltage charge characteristic with maximum charge current externally programmable up to 2A, set using an external current sense resistor. A precondition feature trickle-charges a low voltage battery and bad-battery detection provides a signal and suspends charging if a battery does not respond to preconditioning. It can be configured to terminate charging when charge current falls to C/10 or one-tenth the programmed maximum current. Once charging is terminated, the LT3650 enters a low current (85µA) standby mode. An auto-restart feature starts a new charging cycle if the battery voltage drops 2.5% from the float voltage or if a new battery is inserted into a charging system. The LT3650 contains an user-programmable internal safety timer.
● Wide input voltage range (4.75 to 32V, 40V absolute maximum)
● Up to 2A programmable charge current
● User-selectable termination (C/10 or onboard termination timer)
● Dynamic charge rate programming/soft-start pin
● Programmable input current limit
● 1MHz Fixed frequency
● Average current mode control
● 0.5% Float voltage accuracy
● 5% Charge current accuracy
● 2.5% C/10 detection accuracy
● NTC resistor temperature monitor
● Auto-recharge at 97.5% float voltage
● Auto-precondition at <70% float voltage
● Bad battery detection with auto-reset
● Binary coded open-collector status pins
