ISL9221 Datasheet PDF - Intersil

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ISL9221
Intersil

Part Number ISL9221
Description Dual Input Lithium Ion Battery Charger
Page 11 Pages


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®
Data Sheet
April 3, 2008
ISL9221
FN6541.1
Dual Input Lithium Ion Battery Charger
with OVP USB Bypass and 10mA LDO
The ISL9221 Lithium Ion charging IC is designed to meet the
charging requirements of most of today’s handheld devices.
The IC provides two inputs for either USB connection where
the current is limited by the USB standard or for
powering/charging from a power adapter.
If the voltage at either VUSB or VDC pin is within the safe
allowable range, the PPR pin is pulled low indicating to the
system processor that external power is available.
Charging can be enabled/disabled by controlling the state of
the EN pin. While charging, the CHG pin is pulled low
indicating the battery is being charged.
The battery is charged to 4.2V with only a 1% error across
the temperature range. USB charge current, Adapter charge
current and charge termination currents can be programmed
via external resistors.
The ISL9221 adds an additional feature in providing a limited
amount of current to system architecture while protecting the
system from destructively high voltage.
The device contains Thermal regulation and protection to
provide additional safety features of this device. When the
temperature exceeds +125°C, the current will fold back to
reduce and control the die temperature.
Ordering Information
PART
NUMBER
(Note)
PART
TEMP.
MARKING RANGE (°C)
PACKAGE PKG.
(Pb-Free) DWG. #
ISL9221IRZ 9221
-40°C to +85°C 12 Ld 4x3 DFN L12.4x3
ISL9221IRZ-T* 9221
-40°C to +85°C 12 Ld 4x3 DFN L12.4x3
*Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach materials
and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which
is RoHS compliant and compatible with both SnPb and Pb-free
soldering operations. Intersil Pb-free products are MSL classified at
Pb-free peak reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020.
Features
• Lithium Ion/Polymer battery charging
• Dual input - USB host or car/wall adapter
• Input voltage withstanding up to 28V
• 5.4V overvoltage protection on VUSB inputs
• Charging current up to 1.2A
• 4.9V/10mA linear regulator with input OVP
• Current limit on bypass path
• Programmable end-of-charge current
• Programmable charging current
• Programmable USB current limit
• Charging and power present indicator pins
• Charge enable pin
• Reverse current protection
• Pb-free (RoHS compliant)
Applications
• Smart Handheld Devices
• Cell Phones, PDAs, MP3 Players
• Digital Still Cameras
• Handheld Test Equipment
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”
Pinout
ISL9221
(12 LD DFN)
TOP VIEW
VDC 1
VUSB 2
PPR 3
CHG 4
EN 5
IMIN 6
12 VDC_LDO
11 BAT
10 USB_BYP
9 IVDC
8 GND
7 IUSB
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.
Copyright Intersil Americas Inc. 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.



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ISL9221
Absolute Maximum Ratings
Supply Voltage (VDC, VUSB). . . . . . . . . . . . . . . . . . . . . . -0.3V to 28V
Other Input Voltage (EN, IMIN, IUSB, IVDC) . . . . . . . . . . -0.3V to 7V
Open Drain Pull Voltage (PPR, CHG) . . . . . . . . . . . . . . .-0.3V to 7V
Other Pin Voltage(VDC_LDO, USB_BYP, VBAT) . . . . . .-0.3V to 7V
Recommended Operating Conditions
Ambient Temperature Range . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Supply Voltage (VUSB) . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V to 5.3V
Supply Voltage (VDC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V to 6.7V
Typical Adapter Charge Current . . . . . . . . . . . . . . . . 100mA to 1.2A
Typical USB Charge Current . . . . . . . . . . . . . . . . 46.5mA to 465mA
Typical USB Bypass Current . . . . . . . . . . . . . . . . . . . 0mA to 200mA
Typical LDO Current . . . . . . . . . . . . . . . . . . . . . . . . . . 0mA to 10mA
Thermal Information
Thermal Resistance (Typical, Notes 1, 2) θJA (°C/W) θJC (°C/W)
4x3 DFN Package . . . . . . . . . . . . . . . . . . . . 41
3.5
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
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:
1. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
2. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside.
3. Parts are 100% tested at +25°C. Temperature limits established by characterization and are not production tested.
Electrical Specifications Typical Values are tested at USB = VDC = 5V and ambient temperature at +25°C, unless otherwise noted. All
maximum and minimum values are guaranteed under the recommended operating conditions.
PARAMETERS
SYMBOL
CONDITIONS
MIN
(Note 3)
TYP
MAX
(Note 3) UNITS
CHARGER POWER-ON THRESHOLDS
Rising VUSB/VDC Threshold
3.4 3.9 4.2 V
Falling VUSB/VDC Threshold
INPUT VOLTAGE OFFSET
Rising Edge of VDC or VUSB Relative to
VBAT
Falling Edge of VDC or VUSB Relative
to VBAT
STANDBY CURRENT
VOSHC
VOSLC
VBAT = 4.0V, use CHG pin to indicate the
comparator output
BAT Pin Sink Current
VDC Pin Supply Current
VUSB Pin Supply Current
VDC/USB Pin Supply Current
VOLTAGE REGULATION
ISTANDBY
IVDC
IVUSB
EN = HIGH or both inputs are floating
EN = HIGH, ILDO = 0
EN = HIGH, USB_BYP disconnected
EN = LOW, ILDO = 0, USB_BYP disconnected
Output Voltage
VDC Linear ON-resistance
USB Linear ON-resistance
CHARGE CURRENT
VBAT
Load = 10mA
Load = 10mA (TJ = +25°C)
VBAT =3.8V, IVDC = 0.3A, (TJ = +25°C)
VBAT =3.8V, IUSB = 0.3A, (TJ = +25°C)
IVDC Pin Output Voltage
VDC Constant Current Accuracy
VDC Trickle Charge Current
VIVDC VBAT = 3.8V
IVDC_CHRG RIVDC = 12.4kΩ, VBAT = 2.7V to 3.8V
IVDC_TRKL RIVDC = 12.4kΩ, VBAT = 2.2V, given as a % of the
IVDC_CHARGE
3.2
-
20
-
-
-
-
4.158
4.174
-
-
1.19
500
16
3.7
150
80
0.05
365
300
0.63
4.2
4.2
600
600
1.22
550
18
4.0 V
250 mV
- mV
0.5 µA
420 µA
360 µA
0.85 mA
4.242
4.226
-
-
V
V
mΩ
mΩ
1.25 V
580 mA
20 %
2 FN6541.1
April 3, 2008



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ISL9221
Electrical Specifications Typical Values are tested at USB = VDC = 5V and ambient temperature at +25°C, unless otherwise noted. All
maximum and minimum values are guaranteed under the recommended operating conditions. (Continued)
PARAMETERS
SYMBOL
CONDITIONS
MIN
(Note 3)
TYP
MAX
(Note 3) UNITS
IUSB Pin Output Voltage
VIUSB VBAT = 3.8V
VUSB Constant Current Accuracy
IUSB_CHRG RIUSB = 29.4kΩ,VBAT = 2.7V to 3.8V
VUSB Trickle Charge Current
IUSB_TRKL RIUSB = 29.4kΩ, VBAT = 2.2V and if IUSB_CHRG
IVDC_TRKL, then given as a % of the IUSB_CHRG
If IUSB_CHRG IVDC_TRKL
DC and USB End-of-Charge Threshold
IMIN RMIN = 10kΩ
PRECONDITIONING CHARGE THRESHOLD
1.19
211
16
-
46.5
1.22
232
18
IUSB_CHRG
55
1.25
246
20
-
63.5
V
mA
%
%
mA
Preconditioning Charge Threshold
Voltage
VMIN
2.5 2.6 2.7 V
RECHARGE THRESHOLD
Recharge Threshold Voltage
PROTECTIONS
VRCH
3.8 3.9 4.0 V
VDC Overvoltage Level
OVP
6.7 6.8 6.9 V
VDC Overvoltage Hysteresis
VDC Overvoltage Protection Delay
HOVP
- 90 130 mV
- 1 - µs
VUSB Overvoltage Level
5.3 5.4 5.5 V
VUSB Overvoltage Hysteresis
- 60 90 mV
VUSB Overvoltage Protection Delay
- 1 - µs
Short Circuit (USB_BYP)
BYPASS FETS
IOCP
- 400 600 mA
Resistance VUSB to USB_BYP
USB_
rDS(ON)
Drop Out VUSB to USB_BYP
VUSBDO
INTERNAL TEMPERATURE MONITORING
Measured at 200mA, 4.3V < VDC < 5.3V
IOUT = 150mA, VUSB > 4.3V
- 1.3 2.0 Ω
- 200 - mV
Current Fold Back Threshold
LOGIC INPUT AND OUTPUT
TFOLD
- 125 - °C
EN Pin Logic Input HIGH
EN Pin Logic Input LOW
EN Pin Internal Pull-down Resistance
VIH
VIL
1.3 -
-V
- - 0.4 V
350 600 850 kΩ
CHG and PRR Sink Current
Pin Voltage = 0.8V
10 -
- mA
LINEAR REGULATOR
Output Voltage
Voltage Regulation Accuracy
Dropout (VDC to VLDO)
Current Limit
VLDO
VREG
VDO
ILIMIT
Initial accuracy, ILDO = 10mA; TJ = +25°C
Line/Load, ILDO = 10µA to 10mA,
VDC = VLDO + 0.5V to 6.5V; TJ = -40°C to +125°C
ILDO = 10mA, VLDO= 4.9V, VDC > VLDO+0.5V
For ILDO = 10mA option, VDC = 5.5V
-
-2.0
-2.8
-
12
4.94
-
-
30
-
-
+2.0
+2.8
V
%
%
50 mV
- mA
3 FN6541.1
April 3, 2008



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ISL9221
Pin Assignments
NAME
VDC
VUSB
VDC_LDO
USB_BYP
PIN
1
2
12
10
IVDC
IUSB
IMIN
BAT
EN
PPR
CHG
GND
9
7
6
11
5
3
4
8
TYPE
AI
AI
AO
AO
AI
AI
AI
AO
DI
OD
OD
G
DESCRIPTION
Input pin from car adapter or AC/DC adapter
Input pin from USB host device
Output pin of Linear Regulator
Output pin from USB bypass circuitry
Battery current setting pin for adapter power
Current setting pin for USB power
End-of-charge current setting pin
Output pin to battery
Active low charge enable pin
Active low power present indicator pin
Active low charging indication pin
Ground pad
TABLE 1. TYPE CHART
SYMBOL
DESCRIPTION
A Analog Pin
D Digital Pin
I Input Pin
O Output Pin
OD Open-Drain
G Ground
Functional Pin Descriptions
VDC
Adapter input pin. This pin is usually connected to adapter
power. The maximum input voltage is 28V. The charge
current from this pin is programmable up to 1.2A by selection
of the resistor on the IVDC pin. When this pin is connected to
a power source, no charge current is drawn from the USB
pin. A 1µF or larger value ceramic capacitor is
recommended for decoupling.
VDC_LDO
Linear regulator output. A 0.1µF to 1µF ceramic capacitor
from this pin to ground is required.
USB_BYP
USB input bypass pin. This is an output from the low current
bypass FET connected to the USB input pin. The USB_BYP
can be connected to the system to provide safe,
voltage-limited power from the USB input pin.
VUSB
VUSB Input pin. This pin is usually connected to a USB port
power connector. The maximum input voltage is 28V.
However, the internal OVP circuitry will trip at 5.4V.
The maximum current drawn from the VUSB pin is the
combination of the load at USB_BYP and the programmed
USB charging current.
A 1µF bypass capacitor is recommended on the VUSB pin.
Higher values of bypass capacitance can be utilized but the
designer should refer to the maximum allowed bus capacitance
per USB application standard. When using ceramic capacitors,
a small resistance value, such as 1Ω in series with the
capacitor, is recommended to reduce voltage overshoot.
IVDC
Adapter charging current setting pin. A resistor on this pin
sets the maximum charging current to be delivered to the
BAT pin. The maximum current, however, may be reduced
by the adapter’s current limit or by the power dissipation
within the charging IC.
IUSB
USB charge current pin. This pin is connected internally to a
current source for setting the programmed charging current
delivered to the BAT pin.
BAT
Charger IC output pin. This pin is to be connected to the
positive (+) terminal of the battery. The charging IC monitors
this pin to determine the charge state of the battery.
A 1µF bypass capacitor from the BAT pin to ground is
recommended. The charging IC relies on the battery to help
stabilize the circuitry and it is not recommended to operate
the charger IC without a battery connected to this pin.
EN
Enable charging pin. This pin is a logic level input to control
charging by the system processor. An external pull-up
resistor should be connected to processor’s I/O power
supply.
4 FN6541.1
April 3, 2008



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