ISL6291-1CRZ Intersil, ISL6291-1CRZ Datasheet

IC CHARGER LI-ION 4.1V 5X5 16QFN

ISL6291-1CRZ

Manufacturer Part Number
ISL6291-1CRZ
Description
IC CHARGER LI-ION 4.1V 5X5 16QFN
Manufacturer
Intersil
Datasheet

Specifications of ISL6291-1CRZ

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
Voltage - Supply
4.35 V ~ 10 V
Operating Temperature
-20°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-VQFN Exposed Pad, 16-HVQFN, 16-SQFN, 16-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Li-ion/Li Polymer Linear Battery Charger
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.
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
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.
When the wall adapter is not present, the ISL6291 draws
less than 1
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.
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.
µ
A current from the battery. Two logic outputs
®
1
Data Sheet
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Integrated Linear Pass Element
• Integrated Charge Current Sensor
• No External Reverse Blocking Diode Required
• 1% Voltage Accuracy
• 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
• Pb-Free Available (RoHS Compliant)
Applications
• Handheld Devices
• Cell Phones
• PDAs
• Stand-Alone Chargers
• USB Bus-Powered Chargers
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
• Technical Brief TB389 “PCB Land Pattern Design and
Pinout
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
Surface Mount Guidelines for QFN Packages”
All other trademarks mentioned are the property of their respective owners.
STATUS
FAULT
|
May 2, 2005
Intersil (and design) is a registered trademark of Intersil Americas Inc.
TIME
VIN
1
2
3
4
Copyright Intersil Americas Inc. 2005. All Rights Reserved
16
5
ISL6291 (QFN)
TOP VIEW
15
6
14
7
13
8
12
10
11
9
ISL6291
VBAT
TEMP
IMIN
IREF
JA
FN9102.2
= 33°C/W)

Related parts for ISL6291-1CRZ

ISL6291-1CRZ Summary of contents

Page 1

... A V2P8 pin outputs a 2.8V reference voltage that can be used to bias other circuits indication for the adapter presence. 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. ...

Page 2

... Ordering Information TEMP. RANGE PART NUMBER (°C) PACKAGE ISL6291-1CR - 5x5 QFN L16.5x5B ISL6291-1CRZ - 5x5 QFN (See Note) (Pb-free) ISL6291-2CR - 5x5 QFN L16.5x5B ISL6291-2CRZ - 5x5 QFN (See Note) (Pb-free) ISL6291-2CR- - 5x5 QFN L16.5x5B TR5155 ISL6291-2CRZ- - 5x5 QFN TR5155 (See Note) (Pb-free) ISL6291EVAL1 Evaluation Board *Add “ ...

Page 3

Block Diagrams VIN x 3 V2P8 REF IREF Current Source IMIN I SEN2 TOEN V2P8 V TMIN TEMP V TMAX 3 V POR Inputok 100000:1 V current CH mirror V MIN I V SEN RECHRG ...

Page 4

... Typical Application 5V W all Adapter µ VIN VBAT TOEN Ω Ω ISL6291 TEMP FAULT IREF STATUS IMIN E N V2P8 TIME GND µ TIME µ V2P8 C 2 Battery Pack IREF IMIN Ω Ω FN9102.2 May 2, 2005 ...

Page 5

... CH V ISL6291 VBAT = 4.2V, charge current = 0.5A DROP 80kΩ, VBAT = V CHARGE IREF CH I TRICKLE I R pin = 80kΩ EOC IMIN V ISL6291-2 RECHRG V ISL6291-1 RECHRG V MIN V V2P8 = 3V TMIN V TMAX V RMV T FOLD G FOLD C = 15nF TIME Pin Voltage = 0.8V θ (°C/ MIN TYP ...

Page 6

Functional Pin Description VIN (Pin 1, 15, 16) VIN is the input power source pin that is connected to a wall adapter. FAULT (Pin 2) FAULT is an open-drain output indicating fault status. When a fault condition occurs, this pin ...

Page 7

... It is not recommended to fast charge a Li-ion battery when the battery is deeply discharged, indicated by a low battery voltage. When the ISL6291 sees a battery voltage lower than the V Specifications, it forces 1/10 of the current in the constant current mode into the battery ...

Page 8

... During the constant current charge mode, the STATUS pin remains LOW and the FAULT pin remains HIGH. Constant Voltage Charge Mode The ISL6291 regulates the battery terminal voltage at V the constant voltage mode. As the battery continues being charged, the charge current starts to decrease, as shown in Figure 1 ...

Page 9

... C Battery Pack Temperature Monitoring The ISL6291 uses two comparators to form a window comparator. Figure 3 shows the internal circuit. When the TEMP pin voltage is “out of the window,” as determined by the V and V , the charging is stopped. The two ...

Page 10

... The ISL6291 assumes that the thermistor is co-packed with the battery and is removed together with the battery. When the ISL6291 sees a voltage of 2.1V or higher on the TEMP pin, it assumes that the battery is removed. When the battery is removed, the charger stops and indicates a fault signal. A new charge cycle starts when a battery is inserted again ...

Page 11

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

Related keywords