LT3650-8.X Series

High Voltage 2 Amp Monolithic 2-Cell Li-Ion Battery Charger

Catalog

High Voltage 2 Amp Monolithic 2-Cell Li-Ion Battery Charger

Part	Operating Temperature [Max]	Operating Temperature [Min]	Fault Protection	Charge Current - Max [Max]	Battery Chemistry	Number of Cells	Programmable Features	Mounting Type	Current - Charging	Voltage - Supply (Max) [Max]	Package / Case	Supplier Device Package	Battery Pack Voltage	Package / Case
Analog Devices LT3650EDD-8.2#PBF	85 °C	-40 °C	Over Temperature	2 A	Lithium Ion/Polymer	2	Timer	Surface Mount	Constant - Programmable	32 V	12-WFDFN Exposed Pad	12-DFN (3x3)
Analog Devices LT3650IDD-8.2#TRPBF	85 °C	-40 °C	Over Temperature	2 A	Lithium Ion/Polymer	2	Timer	Surface Mount	Constant - Programmable	32 V	12-WFDFN Exposed Pad	12-DFN (3x3)
Analog Devices LT3650EMSE-4.1#PBF	85 °C	-40 °C	Over Temperature	2 A	Lithium Ion/Polymer	1	Timer	Surface Mount	Constant - Programmable	32 V	12-TSSOP Exposed Pad	12-MSOP-EP	4.1 V	0.118 in 3 mm
Analog Devices LT3650EDD-4.1#PBF	85 °C	-40 °C	Over Temperature	2 A	Lithium Ion/Polymer	1	Timer	Surface Mount	Constant - Programmable	32 V	12-WFDFN Exposed Pad	12-DFN (3x3)	4.1 V
Analog Devices LT3650IDD-8.4#TRPBF	85 °C	-40 °C	Over Temperature	2 A	Lithium Ion/Polymer	2	Timer	Surface Mount	Constant - Programmable	32 V	12-WFDFN Exposed Pad	12-DFN (3x3)	8.4 V
Analog Devices LT3650EMSE-4.2#PBF	85 °C	-40 °C	Over Temperature	2 A	Lithium Ion/Polymer	1	Timer	Surface Mount	Constant - Programmable	32 V	12-TSSOP Exposed Pad	12-MSOP-EP	4.2 V	0.118 in 3 mm
Analog Devices LT3650IDD-4.2#TRPBF	85 °C	-40 °C	Over Temperature	2 A	Lithium Ion/Polymer	1	Timer	Surface Mount	Constant - Programmable	32 V	12-WFDFN Exposed Pad	12-DFN (3x3)	4.2 V
Analog Devices LT3650IDD-4.2#PBF	85 °C	-40 °C	Over Temperature	2 A	Lithium Ion/Polymer	1	Timer	Surface Mount	Constant - Programmable	32 V	12-WFDFN Exposed Pad	12-DFN (3x3)	4.2 V

Catalog

High Voltage 2 Amp Monolithic 2-Cell Li-Ion Battery Charger

Key Features

• Wide Input Voltage Range: 4.75V to 32V (40V Absolute Maximum)

• Programmable Charge Current Up to 2A

• User-Selectable Termination: C/10 or Onboard Termination Timer

• Dynamic Charge Rate Programming/Soft-Start Pin

• Programmable Input Current Limit

• No VINBlocking Diode Required

• 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

• 3mm × 3mm DFN-12 or MSOP-12 Package

Description

The LT3650 is a complete monolithic single-cell Li-Ion/Polymer battery charger that operates over a 4.75V 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.The LT3650 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 fl oat voltage, or if a new battery is inserted into a charging system.The LT3650 contains a user-programmable internal safety timer (typically set to a three hour full cycle time). The IC can be configured to use this internal timer if a time-based termination scheme is desired in which charging can continue below C/10 until a desired time is reached.The LT3650 is available in a low profile (0.75mm) 3mm × 3mm 12-pin DFN and 12-pin MSOP packages.Float VoltageLT3650-4.14.1VLT3650-4.24.2VLT3650-8.28.2VLT3650-8.48.4VApplicationsIndustrial Handheld Instruments12V to 24V Automotive and Heavy EquipmentDesktop Cradle ChargersNotebook Computers