Datasheet > LTC1734L

LTC1734L

更新时间： 2024-01-23 20:19:30

品牌	Logo	应用领域
凌特 - Linear		电池
页数	文件大小	规格书
12页	186K
描述
Lithium-Ion Linear Battery Charger in ThinSOT

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中文翻译

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数据手册

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LTC1734L 数据手册

LTC1734L

Lithium-Ion Linear

Battery Charger in ThinSOT

FEATURES

DESCRIPTIO

Low Profile (1mm) ThinSOT^TMPackage

TheLTC^®1734Lisalowcost,singlecell,constant-current/

constant-voltage Li-Ion battery charger controller. When

combined with a few external components, the SOT-23

packageformsaverysmall,lowcostchargerforsinglecell

lithium-ion batteries. The LTC1734L is a lower charge

current version of the LTC1734.

■

Programmable Charge Current: 50mA to 180mA

■

No Blocking Diode Required

■

No Sense Resistor Required

■

1% Accurate Preset Voltage: 4.2V

■

Charge Current Monitor Output

for Charge Termination

The LTC1734L provides a fixed float voltage of 4.2V with

1% accuracy (for 4.1V and 4.15V float voltages, contact

LTC Marketing). Constant current is programmed using a

singleexternalresistorbetweenthePROGpinandground.

Manual shutdown is accomplished by floating the pro-

gram resistor while removing input power automatically

puts the LTC1734L into a sleep mode. Both the shutdown

and sleep modes drain near zero current from the battery.

■

Automatic Sleep Mode with Input Supply Removal

■

Manual Shutdown

■

Negligible Battery Drain Current in Shutdown

■

Undervoltage Lockout

■

Self Protection for Overcurrent/Overtemperature

APPLICATIO S

Charge current can be monitored via the voltage on the

PROG pin allowing a microcontroller or ADC to read the

currentanddeterminewhentoterminatethechargecycle.

The output driver is both current limited and thermally

protectedtopreventtheLTC1734Lfromoperatingoutside

of safe limits. No external blocking diode is required.

■

Cellular Telephones

■

Handheld Computers

■

Digital Cameras

■

Charging Docks and Cradles

■

Low Cost and Small Size Chargers

■

Programmable Current Sources

The LTC1734L can also function as a general purpose

current source or as a current source for charging nickel-

cadmium (NiCd) and nickel-metal-hydride (NiMH) batter-

ies using external termination.

, LTC and LT are registered trademarks of Linear Technology Corporation.

ThinSOT is a trademark of Linear Technology Corporation.

TYPICAL APPLICATIO

PROG Pin Indicates Charge Status

BAT

80mA Li-Ion Battery Charger

SENSE

LTC1734L

1µF

UMT4403

GND

DRIVE

CONSTANT

CURRENT

CONSTANT

VOLTAGE

= 80mA

BAT

PROG

BAT

1.5V

PROG

SINGLE

Li-Ion

BATTERY

10µF

PROG

4.7k

1734 TA01

CHARGING

BEGINS

CHARGING

COMPLETE

1734 TA01b

1734lf

12 3 4 5 6 7...12

中文翻译

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LTC1734LES6-4.2	Linear	获取价格	Lithium-Ion Linear Battery Charger in ThinSOT
LTC1734LES6-4.2#PBF	Linear	获取价格	LTC1734L - Lithium-Ion Linear Battery Charger in ThinSOT; Package: SOT; Pins: 6; Temperatu
LTC1734LES6-4.2#TR	Linear	获取价格	LTC1734L - Lithium-Ion Linear Battery Charger in ThinSOT; Package: SOT; Pins: 6; Temperatu
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LTC1734LES6-4.2#TRMPBF	Linear	获取价格	LTC1734L - Lithium-Ion Linear Battery Charger in ThinSOT; Package: SOT; Pins: 6; Temperatu
LTC1734LES6-4.2#TRPBF	Linear	获取价格	LTC1734L - Lithium-Ion Linear Battery Charger in ThinSOT; Package: SOT; Pins: 6; Temperatu
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