Datasheet > ISL6291-1CRZ-T

ISL6291-1CRZ-T

更新时间： 2024-11-12 22:55:35

品牌	Logo	应用领域
英特矽尔 - INTERSIL		电池
页数	文件大小	规格书
11页	350K
描述
Li-ion/Li Polymer Linear Battery Charger

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ISL6291-1CRZ-T 数据手册

ISL6291

Data Sheet

May 2, 2005

FN9102.2

Li-ion/Li Polymer Linear Battery Charger

Features

The ISL6291 provides a low-cost integrated charger solution

for single-cell Li-ion and Li Polymer rechargeable batteries.

No external pass element, current sensing resistor, or

reverse blocking diode is required with this solution.

• Integrated Linear Pass Element

• Integrated Charge Current Sensor

• No External Reverse Blocking Diode Required

• 1% Voltage Accuracy

The ISL6291 is a constant-current (CC)/constant-voltage

(CV) charger. The constant charge current is programmable

up to 2.0A with an external signal resistor. An internal

trimmed current-sense circuit guarantees 10% accuracy,

with no bulky external current-sense resistor. The constant

voltage is either 4.1V or 4.2V. The charger always

preconditions the battery with 1/10 of the programmed

charge current at the beginning of a charge cycle, until it

verifies that the battery can be fast-charged. A safety timer

prevents over-charging a dead battery. The charging

terminates as the charge current falls below the

• Programmable Current Limit Up to 2.0A

• Programmable End-of-Charge Current

• Trickle Charge an Over Discharged Battery

• Charge Current Thermal Foldback

• Simple Interface for Low-Cost Thermistor

• Accepts USB Bus Power

• Ambient Temperature Range: -20°C to 70°C

• Thermally-Enhanced 5x5 QFN Package (θ = 33°C/W)

programmed minimum current during the CV mode. The

charger automatically re-charges the battery when the

battery voltage drops below a recharge threshold. A simple

interface with an NTC thermistor avoids charging the battery

outside a programmable temperature window. A thermal-

foldback feature of the ISL6291 guarantees safe operation

when the printed circuit board space is limited for thermal

dissipation. The charger reduces the charge current

automatically, as the internal temperature rises above a

preset level, to prevent further temperature rise.

• Pb-Free Available (RoHS Compliant)

Applications

• Handheld Devices

• Cell Phones

• PDAs

• Stand-Alone Chargers

• USB Bus-Powered Chargers

When the wall adapter is not present, the ISL6291 draws

less than 1µA current from the battery. Two logic outputs

provide the charging status and fault information, and an

easy interface to system logic. A V2P8 pin outputs a 2.8V

reference voltage that can be used to bias other circuits, or

as an indication for the adapter presence.

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

• Technical Brief TB389 “PCB Land Pattern Design and

Surface Mount Guidelines for QFN Packages”

The ISL6291 is packed in a thermally enhanced 5x5 QFN

package. See the Technical Brief TB389 given in the Related

Literature for more information related to the package.

Pinout

ISL6291 (QFN)

TOP VIEW

16 15 14 13

VIN

FAULT

STATUS

TIME

12 VBAT

11 TEMP

10 IMIN

IREF

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

12 3 4 5 6 7...11

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ISL6291-1CRZ-T 替代型号

型号	品牌	替代类型	描述	数据表
ISL6291-1CRZ	INTERSIL	完全替代	Li-ion/Li Polymer Linear Battery Charger

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ISL6291-2CRZ-T	INTERSIL	获取价格	Li-ion/Li Polymer Linear Battery Charger
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