ltc1730es8-4.2-trpbf Linear Technology Corporation, ltc1730es8-4.2-trpbf Datasheet

ltc1730es8-4.2-trpbf

Manufacturer Part Number

ltc1730es8-4.2-trpbf

Description

Lithium-ion Battery Pulse Chargers With Overcurrent Protection

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC1730ES8-4.2-TRPBF.pdf (12 pages)

Current page: 1 of 12
Download datasheet (159Kb)

FEATURES

APPLICATIO S

TYPICAL APPLICATIO

Complete Pulse Charger for 1-Cell Lithium-Ion

Batteries

Sense Resistor Limits Maximum Current for Safety

1% Float Voltage Accuracy

End-of-Charge (C/10) Detection Output

Programmable Charge Termination Timer

Internal 0.35 NMOS Switch

No Blocking Diode Required

SEL Pin to Set Either 4.1V or 4.2V/Cell (LTC1730-4)

Low-Battery Drain (1 A Max) when Input Supply Is

Removed

Battery Temperature Sensing and Charge

Qualification

Automatic Trickle Charge for Low-Battery

Automatic Battery Refresh

Standalone Lithium-Ion Battery Charger

Handheld Computers

Cellular Telephones

*NTC: DALE NTHS-1206N02

WITH 1A CURRENT LIMIT

1A, Single Cell 4.2V Li-Ion Battery Charger (8-Pin Package)

CHARGE STATUS

= 4.5V TO 12V

4.1k

10k

NTC*

TIMER

0.1 F

CHRG

NTC/SHDN

TIMER

LTC1730ES8-4.2

DESCRIPTIO

The LTC

lithium-ion batteries. When charging a depleted cell, the

internal MOSFET is fully on allowing the current limited

input power source to provide charge current to the

battery, virtually eliminating heat generation in the charger.

As the battery accepts charge and approaches the pro-

grammed voltage, the internal MOSFET begins switching

off and on with the duty cycle gradually decreasing as the

battery approaches a fully charged condition. A program-

mable timer ends the charge cycle. The end-of-charge

condition is indicated at the CHRG pin when the average

charge current falls to C/10. Removing the input voltage

puts the LTC1730 into a sleep mode, dropping the battery

current drain to less than 1 A (maximum).

An external sense resistor limits the maximum charge

current as a safety precaution against a user connecting a

wall adapter with the incorrect or no current limit. The

internal MOSFET prevents reverse battery current from

flowing if the input voltage is shorted to ground, eliminat-

ing the need for a blocking diode.

The LTC1730-4 is available in the 16-pin SSOP package

and the LTC1730-4.2 is available in the 8-pin SO package.

SENSE

GND

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

GATE

BAT

Overcurrent Protection

LTC1730-4/LTC1730-4.2

1730 is a complete pulse charger for 1-cell

10k

1-CELL

Li-Ion

BATTERY

0.047 F

0.022 F

Pulse Charger with

Lithium-Ion Battery

0.05

SENSE

1730 TA01

4.7

1 F

sn1730 1730fs

Related parts for ltc1730es8-4.2-trpbf

Related keywords

ltc1730es8-4.2-trpbf datasheet
ltc1730es8-4.2-trpbf data sheet
ltc1730es8-4.2-trpbf pdf datasheet
ltc1730es8-4.2-trpbf component
ltc1730es8-4.2-trpbf part
ltc1730es8-4.2-trpbf distributor
ltc1730es8-4.2-trpbf RoHS
ltc1730es8-4.2-trpbf datasheet download