intersil ISL6292 DATA SHEET

¬

ISL6292

Data Sheet December 17, 2007

Li-ion/Li Polymer Battery Charger

The ISL6292 is an integrated single-cell Li-ion or Li-polymer
battery charger capable of operating with an input voltage as
low as 2.4V. This charger is designed to work with various
types of AC adapters or a USB port.

The ISL6292 operates as a linear charger when the AC
adapter is a voltage source. The battery is charged in a
CC/CV (constant current/const ant voltage) profile. The
charge current is programmable with an external resistor up
to 2A. The ISL6292 can also work with a current-limited
adapter to minimize the thermal dissipation, in which case,
the ISL6292 combines the benefits of both a linear charger
and a pulse charger.

The ISL6292 features charge current thermal foldback to
guarantee safe operation when the printed circuit board is
space limited for thermal dissipation. Additional features
include preconditioning of an over-discharged battery, an
NTC thermistor interface for charging the battery in a safe
temperature range, automatic recharge, and thermally
enhanced QFN or DFN packages.

Pinouts

ISL6292

(16 LD QFN)

TOP VIEW

VIN

VIN

VBAT

VBAT

12

11

10

9

6578

EN

V2P8

TOEN

VBAT

TEMP

IMIN

IREF

VIN

FAULT

STATUS

TIME

16 14 13

15

1

2

3

4

GND

FN9105.9

Features

• Complete Charger for Single-Cell Li-ion Batteries

• Very Low Thermal Dissipation

• Integrated Pass Element and Current Sensor

• No External Blocking Diode Required

• 1% Voltage Accuracy

• Programmable Current Limit up to 2A

• Programmable End-of-Charge Current

• Charge Current Thermal Foldback

• NTC Thermistor Interface for Battery Temperature Monitor

• Accepts Multiple T ypes of Adapters or USB BUS Power

• Guaranteed to Operate at 2.65V After Start-Up

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

• Thermally-Enhanced QFN Packages

• Handheld Devices, including Medical Handhelds

• PDAs, Cell Phones and Smart Phones

• Portable Instruments, MP3 Players

• Self-Charging Battery Packs

• Stand-Alone Chargers

• USB Bus-Powered Chargers

• Pb-Free Available (RoHS Compliant)

Related Literature

• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”

• Technical Brief TB379 “Thermal Characterization of
Packaged Semiconductor Devices”

VIN

FAULT

STATUS

TIME

GND

ISL6292

(10 LD DFN)

TOP VIEW

1

2

3

4

5

• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”

10

VBAT

9

TEMP

8

IREF

7

V2P8

6

EN

1

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.

Copyright Intersil Americas Inc. 2003-2007. All Rights Reserved

2

ISL6292

Absolute Maximum Ratings Thermal Information

Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 7V

Output Pin Voltage (BAT). . . . . . . . . . . . . . . . . . . . . . . -0.3V to 5.5V

Signal Input Voltage (TOEN, TIME, IREF, IMIN) . . . . . -0.3V to 3.2V

Output Pin Voltage (STATUS, FAULT). . . . . . . . . . . . . . .-0.3V to 7V

Charge Current (For 4x4 or 5x5 QFN Packages) . . . . . . . . . . . 2.1A

Charge Current (For 3x3 DFN Package) . . . . . . . . . . . . . . . . . 1.6A

Recommended Operating Conditions

Ambient Temperature Range. . . . . . . . . . . . . . . . . . .-20°C to +70°C

Supply Voltage, VIN. . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3V to 6.5V

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.

NOTES:

is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See

1. θ

JA

Tech Brief TB379.

, “case temperature” location is at the center of the exposed metal pad on the package underside. See Tech Brief TB379.

2. θ

JC

Thermal Resistance (Junction to Ambient) θ

(°C/W) θJC (°C/W)

JA

5x5 QFN Package (Notes 1, 2) . . . . . . 34 4

4x4 QFN Package (Notes 1, 2) . . . . . . 41 4

3x3 DFN Package (Notes 1, 2) . . . . . . 46 4

Maximum Junction Temperature (Plastic Package) . . . . . . .+150°C

Maximum Storage Temperature Range. . . . . . . . . .-65°C to +150°C

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

Electrical Specifications Typical values are tested at V

= 5V and +25°C Ambient Temperature, maximum and minimum values are

IN

guaranteed over 0°C to +70°C Ambient Temperature with a supply voltage in the range of 4.3V to 6.5V, unless
otherwise noted.

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

POWER-ON RESET

Rising VIN Threshold 3.0 3.4 4.0 V
Falling VIN Threshold 2.11 2.4 2.65 V

STANDBY CURRENT

VBAT Pin Sink Current I

STANDBY

VIN Pin Supply Current I
VIN Pin Supply Current I

VIN
VIN

VIN floating or EN = LOW - - 3.0 µA
VBAT floating and EN pulled low - 30 - µA
VBAT floating and EN floating - 1 - mA

VOLTAGE REGULATION

Output Voltage V
Output Voltage V

CH
CH

ISL6292-1 4.059 4.10 4.141 V

ISL6292-2 4.158 4.20 4.242 V
Dropout Voltage VBAT = 3.7V, 0.5A, 4x4 or 5x5 package - 140 - mV
Dropout Voltage VBAT = 3.7V, 0.5A, 3x3 package - 175 - mV

CHARGE CURRENT

Constant Charge Current I
Trickle Charge Current I
Constant Charge Current I
Trickle Charge Current I
Constant Charge Current I
Trickle Charge Current I

CHARGERIREF
TRICKLE
CHARGE
TRICKLE
CHARGE
TRICKLE

End-of-Charge Threshold R

= 80kΩ, V

R

= 80kΩ, V

IREF

IREF Pin Voltage > 1.2V, V

IREF Pin Voltage > 1.2V, V

IREF Pin Voltage < 0.4V, V

IREF Pin Voltage < 0.4V, V

= 80kΩ 85 110 135 mA

IMIN

= 3.7V 0.9 1.0 1.1 A

BAT

= 2.0V - 110 - mA

BAT

= 3.7V 400 450 520 mA

BAT

= 2.0V - 45 - mA

BAT

= 3.7V - - 100 mA

BAT

= 2.0V - 10 - mA

BAT

RECHARGE THRESHOLD

Recharge Voltage Threshold V
Recharge Voltage Threshold V

RECHRG
RECHRG

ISL6292-2 - 4.0 - V

ISL6292-1 - 3.90 - V

3

FN9105.9

December 17, 2007

ISL6292

Electrical Specifications Typical values are tested at V

guaranteed over 0°C to +70°C Ambient Temperature with a supply voltage in the range of 4.3V to 6.5V, unless

= 5V and +25°C Ambient Temperature, maximum and minimum values are

IN

otherwise noted. (Continued)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

TRICKLE CHARGE THRESHOLD

Trickle Charge Threshold Voltage V

MIN

2.7 2.8 3.0 V

TEMPERATURE MONITORING

Low Battery Temperature Threshold V
High Battery Temperature Threshold V
Battery Removal Threshold V
Charge Current Foldback Threshold T
Current Foldback Gain G

TMIN

TMAX

RMV

FOLD

FOLD

V2P8 = 3.0V 1.45 1.51 1.57 V

V2P8 = 3.0V 0.36 0.38 0.40 V

V2P8 = 3.0V - 2.25 - V

85 100 115 °C

-100-mA/°C

OSCILLATOR

C

Oscillation Period t

OSC

= 15nF 2.4 3.0 3.6 ms

TIME

LOGIC INPUT AND OUTPUT

TOEN Input High 2.0 - - V
TOEN and EN Input Low --0.8V
IREF and IMIN Input High 1.2 - - V
IREF and IMIN Input Low --0.4V
STATUS/FAULT Sink Current Pin Voltage = 0.8V 5 - - mA

Typical Operating Performance The test conditions for the Typical Operating Performance are: V

R

IREF

4.2015

4.2010

R

4.2005

4.2000

(V)

4.1995

BAT

V

4.1990

4.1985

4.1980

4.1975
0 0.3 0.6 0.9 1.2 1.5

CHARGE CURRENT (A)

IREF

= 40kΩ

FIGURE 1. CHARGER OUTPUT VOLTAGE vs CHARGE

CURRENT

= R

IMIN

= 80kΩ, V

= 3.7V, Unless Otherwise Noted.

BAT

4.210

4.208

4.206

4.204

4.202

(V)

4.200

BAT

4.198

V

4.196

4.194

4.192

4.190
0 20 40 60 80 100 120

CHARGE CURRENT = 50mA

TEMPERATURE (°C)

FIGURE 2. CHARGER OUTPUT VOLTAGE vs TEMPERATURE

= 5V, TA = +25°C,

IN

4

FN9105.9

December 17, 2007

ISL6292

Typical Operating Performance The test conditions for the Typical Operating Performance are: V

R

IREF

4.30

CHARGE CURRENT = 50mA

4.25

(V)

4.20

BAT

V

4.15

4.10

4.2 4.5 4.8 5.1 5.4 5.7 6.0 6.3
VIN (V)

FIGURE 3. CHARGER OUTPUT VOLT AGE vs INPUT

= R

IMIN

= 80kΩ, V

= 3.7V, Unless Otherwise Noted. (Continued)

BAT

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

CHARGE CURRENT (A)

0.4

0.2

USB500

0

3.0 3.2 3.4 3.6 3.8 4.0

0.5A

V

FIGURE 4. CHARGE CURRENT vs OUTPUT VOLTAGE

1A

BAT

IN

1.5A

USB100

(V)

= 5V, TA = +25°C,

2A

VOLTAGE CHARGE CURRENT = 50mA

1.6

1.4

1.2

1.0

0.8

0.6

0.5A

0.4

CHARGE CURRENT (A)

0.2

0.0
0 20 40 60 80 100 120

1.5A

1.0A

TEMPERATURE (°C)

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

CHARGE CURRENT (A)

0.4

0.2
0

4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1 6.3 6.5

USB100

1.5A

0.5A

1A

USB500

VIN (V)

2A

FIGURE 5. CHARGE CURRENT vs AMBIENT TEMPERATURE FIGURE 6. CHARGE CURRENT vs INPUT VOLTAGE

2.930

2.928

)
V

(
E

2.926

G
A

T

L
O
V

2.924

8
P

2
V

2.922

2.920

3.5 4.0 4.5 5.0 5.5 6.0 6.5

V2P8 PIN LOADED WITH 2mA

(V)

V

IN

3.00

2.95

)
V

(

2.90

E

G
TA

2.85

L
O
V
8

2.80

P

2
V

2.75

2.70
0246810

V2P8 LOAD CURRENT (mA)

FIGURE 7. V2P8 OUTPUT vs INPUT VOLTAGE FIGURE 8. V2P8 OUTPUT vs ITS LOAD CURRENT

5

December 17, 2007

FN9105.9

ISL6292

Typical Operating Performance The test conditions for the Typical Operating Performance are: V

R

= R

IREF

700
650
600
550
500

(mΩ)

450
400

DS(ON)

r

350
300
250
200

FIGURE 9. r

1.8

1.6

1.4

1.2

1.0

0.8

0.6

LEAKAGE CURRENT (µA)

0.4

BAT

V

0.2

0.0

THERMAL FOLDBACK STARTS
NEAR +100°C

3x3 DFN

4x4 QFN

0 20 40 60 80 100 120

TEMPERATURE (°C)

vs TEMPERATURE AT 3.7V OUTPUT FIGURE 10. r

DS(ON)

0 20 40 60 80 100 120

TEMPERATURE (°C)

FIGURE 11. REVERSE CURRENT vs TEMPERATURE FIGURE 12.

IMIN

= 80kΩ, V

= 3.7V, Unless Otherwise Noted. (Continued)

BAT

420

400

380

360

(mΩ)

340

320

DS(ON)

r

300

280
260

3.0 3.2 3.4 3.6 3.8 4.0

vs OUTPUT VOLTAGE USING CURRENT

DS(ON)

LIMITED ADAPTERS

50

EN = GND

45
40
35
30
25
20
15

QUIESCENT CURRENT (µA)

10

IN

V

5
0

0 20 40 60 80 100 120

500mA CHARGE CURRENT,
R

IREF

4x4 QFN

V

BAT

TEMPERATURE (°C)

INPUT QUIESCENT CURRENT vs TEMPERATURE

= 5V, TA = +25°C,

IN

= 40kΩ

(V)

3x3 DFN

32
30

EN = GND
28
26
24
22
20
18
16
14

QUIESCENT CURRENT (µA)

IN

12

V

10

3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
VIN (V)

FIGURE 13. INPUT QUIESCENT CURRENT vs INPUT

VOLTAGE WHEN SHUTDOWN

6

1.10

1.05

1.00

0.95

0.90

QUIESCENT CURRENT (mA)

0.85

IN

V

0.80

4.3 4.6 4.9 5.2 5.5 5.8 6.1 6.4

BOTH VBAT AND EN
PINS FLOATING

VIN (V)

FIGURE 14. INPUT QUIESCENT CURRENT vs INPUT

VOLTAGE WHEN NOT SHUTDOWN

December 17, 2007

FN9105.9