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.
θ
JA
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
θ
JC
, 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.
SYMBOL
CONDITIONS
MIN
(Note 3)
TYP
MAX
(Note 3) UNITS
PARAMETERS
CHARGER POWER-ON THRESHOLDS
Rising VUSB/VDC Threshold
Falling VUSB/VDC Threshold
INPUT VOLTAGE OFFSET
Rising Edge of VDC or VUSB Relative to
V
BAT
Falling Edge of VDC or VUSB Relative
to V
BAT
STANDBY CURRENT
BAT Pin Sink Current
VDC Pin Supply Current
VUSB Pin Supply Current
VDC/USB Pin Supply Current
VOLTAGE REGULATION
Output Voltage
3.4
3.2
3.9
3.7
4.2
4.0
V
V
VOS
HC
VOS
LC
V
BAT
= 4.0V, use CHG pin to indicate the
comparator output
-
20
150
80
250
-
mV
mV
I
STANDBY
I
VDC
I
VUSB
EN = HIGH or both inputs are floating
EN = HIGH, I
LDO
= 0
EN = HIGH, USB_BYP disconnected
EN = LOW, I
LDO
= 0, USB_BYP disconnected
-
-
-
-
0.05
365
300
0.63
0.5
420
360
0.85
µA
µA
µA
mA
V
BAT
Load = 10mA
Load = 10mA (T
J
= +25°C)
4.158
4.174
-
-
4.2
4.2
600
600
4.242
4.226
-
-
V
V
mΩ
mΩ
VDC Linear ON-resistance
USB Linear ON-resistance
CHARGE CURRENT
IVDC Pin Output Voltage
VDC Constant Current Accuracy
VDC Trickle Charge Current
V
IVDC
V
BAT
=3.8V, I
VDC
= 0.3A, (T
J
= +25°C)
V
BAT
=3.8V, I
USB
= 0.3A, (T
J
= +25°C)
V
BAT
= 3.8V
1.19
500
16
1.22
550
18
1.25
580
20
V
mA
%
I
VDC
_
CHRG
R
IVDC
= 12.4kΩ, V
BAT
= 2.7V to 3.8V
I
VDC_TRKL
R
IVDC
= 12.4kΩ, V
BAT
= 2.2V, given as a % of the
I
VDC
_
CHARGE
2
FN6541.1
April 3, 2008
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)
SYMBOL
V
IUSB
V
BAT
= 3.8V
CONDITIONS
MIN
(Note 3)
1.19
211
16
-
46.5
TYP
1.22
232
18
I
USB_CHRG
55
MAX
(Note 3) UNITS
1.25
246
20
-
63.5
V
mA
%
%
mA
PARAMETERS
IUSB Pin Output Voltage
VUSB Constant Current Accuracy
VUSB Trickle Charge Current
I
USB
_
CHRG
R
IUSB
= 29.4kΩ,V
BAT
= 2.7V to 3.8V
I
USB_TRKL
R
IUSB
= 29.4kΩ, V
BAT
= 2.2V and if I
USB_CHRG
≤
I
VDC_TRKL,
then given as a % of the I
USB
_
CHRG
If I
USB_CHRG
≤
I
VDC_TRKL
DC and USB End-of-Charge Threshold
I
MIN
R
MIN
= 10kΩ
PRECONDITIONING CHARGE THRESHOLD
Preconditioning Charge Threshold
Voltage
RECHARGE THRESHOLD
Recharge Threshold Voltage
PROTECTIONS
VDC Overvoltage Level
VDC Overvoltage Hysteresis
VDC Overvoltage Protection Delay
VUSB Overvoltage Level
VUSB Overvoltage Hysteresis
VUSB Overvoltage Protection Delay
Short Circuit (USB_BYP)
BYPASS FETS
Resistance VUSB to USB_BYP
Drop Out VUSB to USB_BYP
USB_
r
DS(ON)
VUSB
DO
Measured at 200mA, 4.3V < V
DC
< 5.3V
I
OUT
= 150mA, V
USB
> 4.3V
-
-
1.3
200
2.0
-
Ω
mV
I
OCP
OVP
H
OVP
6.7
-
-
5.3
-
-
-
6.8
90
1
5.4
60
1
400
6.9
130
-
5.5
90
-
600
V
mV
µs
V
mV
µs
mA
V
RCH
3.8
3.9
4.0
V
V
MIN
2.5
2.6
2.7
V
INTERNAL TEMPERATURE MONITORING
Current Fold Back Threshold
LOGIC INPUT AND OUTPUT
EN Pin Logic Input HIGH
EN Pin Logic Input LOW
EN Pin Internal Pull-down Resistance
CHG and PRR Sink Current
LINEAR REGULATOR
Output Voltage
Voltage Regulation Accuracy
V
LDO
V
REG
Initial accuracy, I
LDO
= 10mA; T
J
= +25°C
Line/Load, I
LDO
= 10µA to 10mA,
VDC = V
LDO
+ 0.5V to 6.5V; T
J
= -40°C to +125°C
Dropout (VDC to V
LDO
)
Current Limit
V
DO
I
LIMIT
I
LDO
= 10mA, V
LDO
= 4.9V, V
DC
> V
LDO
+0.5V
For I
LDO
= 10mA option, V
DC
= 5.5V
-
-2.0
-2.8
-
12
4.94
-
-
30
-
-
+2.0
+2.8
50
-
V
%
%
mV
mA
Pin Voltage = 0.8V
V
IH
V
IL
1.3
-
350
10
-
-
600
-
-
0.4
850
-
V
V
kΩ
mA
T
FOLD
-
125
-
°C
3
FN6541.1
April 3, 2008
ISL9221
Pin Assignments
NAME
VDC
VUSB
VDC_LDO
USB_BYP
IVDC
IUSB
IMIN
BAT
EN
PPR
CHG
GND
PIN
1
2
12
10
9
7
6
11
5
3
4
8
TABLE 1. TYPE CHART
SYMBOL
A
D
I
O
OD
G
Analog Pin
Digital Pin
Input Pin
Output Pin
Open-Drain
Ground
DESCRIPTION
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
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
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.
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.
VDC_LDO
Linear regulator output. A 0.1µF to 1µF ceramic capacitor
from this pin to ground is required.
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.
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.
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
ISL9221
The USB_BYP and VDC_LDO stay on regardless of the
state of this pin. This ensures that the processor can be
powered up when an external source is connected to the
VDC or VUSB input pin.
CHG
Charge indication pin. This open-drain pin is pulled low to
indicate when the battery is being charged. If connected to
the processor, a pull-up resistor should be connected to the
processors I/O supply.
The CHG pin can also be used to drive an LED to indicate to
the user the battery is being charged.
PPR
Power presence indication pin. This pin is used to notify the
system processor or enable the power circuitry when a
source is connected. The pin is an open drain output pin,
which pulls low when a valid voltage (above POR) is present
at either the VDC or VUSB pin. The PPR pin is held low
regardless of the state of the EN pin. If connected to the
processor, a pull-up resistor should be connected to the
processors I/O supply. If connected to power circuitry, a
pull-up should be tied to the appropriate bypass supply.
GND
Ground pin. This provides the ground path for all internal
PCB设计
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
