LTC1731ES8-8.4#PBF

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Analog Devices

LITHIUM-ION LINEAR BATTERY CHARGER CONTROLLER

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LTC1731ES8-8.4#PBF

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Analog Devices

LITHIUM-ION LINEAR BATTERY CHARGER CONTROLLER

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DocumentsDatasheet R384 Reliability Data

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LTC1731ES8-8.4#PBF

Battery Chemistry	Multi-Chemistry
Battery Pack Voltage	8.4 V
Charge Current - Max [Max]	500 mA
Current - Charging	Constant - Programmable
Mounting Type	Surface Mount
Number of Cells	2
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	8-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Programmable Features	Timer
Supplier Device Package	8-SO
Voltage - Supply (Max) [Max]	12 V

LTC1731-8.X Series

Single Cell Lithium-Ion Linear Battery Charger Controllers

Part	Supplier Device Package	Charge Current - Max [Max]	Current - Charging	Voltage - Supply (Max) [Max]	Battery Pack Voltage	Package / Case	Package / Case [custom]	Package / Case	Programmable Features	Mounting Type	Number of Cells	Battery Chemistry	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case [y]	Package / Case [x]
Analog Devices LTC1731EMS8-4.1#TRPBF	8-MSOP	500 mA	Constant - Programmable	12 V	4.1 V	8-MSOP 8-TSSOP	0.118 in	3 mm	Timer	Surface Mount	1	Multi-Chemistry	85 °C	-40 °C
Analog Devices LTC1731ES8-4.1#TRPBF	8-SO	500 mA	Constant - Programmable	12 V	4.1 V	8-SOIC			Timer	Surface Mount	1	Multi-Chemistry	85 °C	-40 °C	3.9 mm	0.154 in
Analog Devices LTC1731ES8-8.4#PBF	8-SO	500 mA	Constant - Programmable	12 V	8.4 V	8-SOIC			Timer	Surface Mount	2	Multi-Chemistry	85 °C	-40 °C	3.9 mm	0.154 in
Analog Devices LTC1731EMS8-8.2#TRPBF	8-MSOP	500 mA	Constant - Programmable	12 V		8-MSOP 8-TSSOP	0.118 in	3 mm	Timer	Surface Mount	2	Multi-Chemistry	85 °C	-40 °C
Analog Devices LTC1731ES8-8.2#PBF	8-SO	500 mA	Constant - Programmable	12 V		8-SOIC			Timer	Surface Mount	2	Multi-Chemistry	85 °C	-40 °C	3.9 mm	0.154 in

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 6.34
		10	$ 4.28
		25	$ 3.75
		100	$ 3.16
		250	$ 2.87
		500	$ 2.69
		1000	$ 2.54
		2500	$ 2.39

Description

General part information

LTC1731-8.X Series

The LTC1731-8.2/LTC1731-8.4 are complete constant-current/constant-voltage linear charger controllers for 2-cell lithium-ion (Li-Ion)batteries. Nickel-cadmium (NiCd) and nickel-metal-hydride (NiMH) batteries can also be charged with constant current using external termination. The external sense resistor sets the charge current with 7% accuracy. An internal resistor divider and precision reference set the final float potential with 1% accuracy. The output float voltages are set internally to 8.2V (LTC1731-8.2) or 8.4V (LTC1731-8.4).When the input supply is removed, the LTC1731-8.2/LTC1731-8.4 automatically enter a low current sleep mode, dropping the battery drain current to typically 15µA. An internal comparator detects the end-of-charge (C/10) condition while a programmable timer, using an external capacitor, sets the total charge time. Fully discharged cells are automatically trickle charged at 10% of the programmed current until battery voltage exceeds 4.95V.The LTC1731-8.2/LTC1731-8.4 are available in the 8-pin MSOP and SO packages. For 1-cell Li-Ion battery charging, see the LTC1731-4.1 and LTC1731-4.2 data sheets.Float VoltageLTC1731-4.14.1VLTC1731-4.24.2VLTC1731-8.28.2VLTC1731-8.48.4VApplicationsCellular PhonesHandheld ComputersCharging Docks and CradlesProgrammable Current Source