LTC1731-8.2 Lithium-Ion linear Battery Charger Controller

The LTC®1731-8.2/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

产品特点 Features

Complete linear Charger Controller for 2-Cell Lithium-Ion Batteries
1% Voltage Accuracy
Programmable Charge Current
C/10 Charge Current Detection Output
Programmable Charge Termination Timer
Space Saving 8-Pin MSOP Package
Automatic Sleep Mode When Input Supply is Removed (15µA Battery Drain)
Automatic Trickle Charging of Low Voltage Cells
Programmable for Constant-Current-Only Mode

参数

应用

Cellular Phones
Handheld Computers
Charging Docks and Cradles
Programmable Current Source

典型应用图

LTC1731-8.2 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC1731EMS8-4.1	MSOP	8	E	$2.20	$1.75
LTC1731EMS8-4.1#PBF	MSOP	8	E	$2.20	$1.75
LTC1731EMS8-4.1#TR	MSOP	8	E		$1.81
LTC1731EMS8-4.1#TRPBF	MSOP	8	E		$1.81
LTC1731EMS8-4.2	MSOP	8	E	$2.20	$1.75
LTC1731EMS8-4.2#PBF	MSOP	8	E	$2.20	$1.75
LTC1731EMS8-4.2#TR	MSOP	8	E		$1.81
LTC1731EMS8-4.2#TRPBF	MSOP	8	E		$1.81
LTC1731EMS8-8.2	MSOP	8	E	$2.20	$1.75
LTC1731EMS8-8.2#PBF	MSOP	8	E	$2.20	$1.75
LTC1731EMS8-8.2#TR	MSOP	8	E		$1.81
LTC1731EMS8-8.2#TRPBF	MSOP	8	E		$1.81
LTC1731EMS8-8.4	MSOP	8	E	$2.20	$1.75
LTC1731EMS8-8.4#PBF	MSOP	8	E	$2.20	$1.75
LTC1731EMS8-8.4#TR	MSOP	8	E		$1.81
LTC1731EMS8-8.4#TRPBF	MSOP	8	E		$1.81
LTC1731ES8-4.1	SO	8	E	$1.85	$1.55
LTC1731ES8-4.1#PBF	SO	8	E	$1.85	$1.55
LTC1731ES8-4.1#TR	SO	8	E		$1.61
LTC1731ES8-4.1#TRPBF	SO	8	E		$1.61
LTC1731ES8-4.2	SO	8	E	$1.85	$1.55
LTC1731ES8-4.2#PBF	SO	8	E	$1.85	$1.55
LTC1731ES8-4.2#TR	SO	8	E		$1.61
LTC1731ES8-4.2#TRPBF	SO	8	E		$1.61
LTC1731ES8-8.2	SO	8	E	$1.85	$1.55
LTC1731ES8-8.2#PBF	SO	8	E	$1.85	$1.55
LTC1731ES8-8.2#TR	SO	8	E		$1.61
LTC1731ES8-8.2#TRPBF	SO	8	E		$1.61
LTC1731ES8-8.4	SO	8	E	$1.85	$1.55
LTC1731ES8-8.4#PBF	SO	8	E	$1.85	$1.55
LTC1731ES8-8.4#TR	SO	8	E		$1.61
LTC1731ES8-8.4#TRPBF	SO	8	E		$1.61

LTC1731-8.2 数据手册及相关资料下载

数据手册(英文) : LTC1731-8.2/LTC1731-8.4 - Lithium-Ion linear Battery Charger Controller.PDF
可靠性数据 : R245 Reliability Data .PDF