LT3650EDD-4.2#PBF

LT3650-4.2 is a complete monolithic single-cell Li-Ion/ polymer battery charger. It provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable upto 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, this device 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. It is used in applications such as industrial handheld instruments, 12V to 24V automotive and heavy equipment, desktop cradle chargers, notebook computers etc.

• Wide input voltage range is 4.75V to 32V
• Dynamic charge rate programming/soft-start pin, average current mode control
• Programmable input current limit, no VIN blocking diode required
• Operating frequency is 1MHz typ at (VIN = 20V, BOOST-SW = 4V, SHDN = 2V)
• NTC resistor temperature monitor, auto-recharge at 97.5% float voltage
• Auto-precondition at <lt/>70% float voltage, bad-battery detection with auto-reset
• Binary coded open-collector status pins
• Operating input supply current is 2.5mA typ at (CC/CV mode, ISW = 0, VIN = 20V, BOOST-SW = 4V)
• Operating temperature is -40°C to 85°C, battery float voltage is 4.2V typ at ( VIN = 20V)
• Package style is 12-lead plastic DFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party