ISL6293_06 Datasheet, PDF (5/8 Pages) Intersil Corporation – Li-ion/Li Polymer Battery Charger Accepting Two Power Sources

ISL6293
Electrical Specifications Typical Values Are Tested at USB = CRDL = 5V and ambient temperature is at 25°C, Unless Otherwise Noted.
All Maximum and Minimum Values Are Guaranteed Under the Recommended Operating Conditions. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
USB Input Constant Charge Current
I_CHARGE USBP = LOW, R_IUSB = 80kΩ, V_BAT = 3.8V
USB Input Trickle Charge Current
I_TRICKLE USBP = LOW, R_IUSB = 80kΩ, V_BAT = 2.4V
Given as a percentage of the USB LOW
I_CHARGE
END-OF-CHARGE CURRENT THRESHOLD
68
84
100
mA
45.0 50.0 55.0
%
Powered From USB Pin
I_EOC
USBP = HIGH, R_IUSB = 80kΩ
Given as a percentage of the USB HIGH
I_CHARGE
8.0
10.5 13.0
%
Powered From USB Pin
I_EOC
USBP = LOW, R_IUSB = 80kΩ
Given as a percentage of the USB LOW
I_CHARGE
17.0 21.0 25.0
%
Powered From CRDL Pin
I_EOC R_ICDL = 1.82kΩ,
5.5
8.5
11.0
%
Given as a percentage of the CRDL I_CHARGE
PRECONDITIONING CHARGE THRESHOLD
Preconditioning Charge Threshold Voltage
INTERNAL TEMPERATURE MONITORING
V_MIN
2.5
2.6
2.7
V
Current Foldback Threshold (Note 5)
LOGIC INPUT AND OUTPUT
T_FOLD
85
100
115
°C
USBP Pin Logic Input High
2.0
V
USBP Pin Logic Input Low
0.4
V
USBP Pin Internal Pull Down Resistance
1000
kΩ
EN Pin Logic Input High
1.2
V
EN Pin Logic Input Low
0.4
V
EN Pin Internal Pull Down Resistance
1000
kΩ
CHG/PPR Sink Current
Pin Voltage = 0.8V
15
mA
NOTES:
3. The 4.0V V_BAT is selected so that the CHG output can be used as the indication for the offset comparator output indication. If the V_BAT is lower
than the POR threshold, no output pin can be used for indication.
4. The maximum and minimum limits are guaranteed over -40°C to 70°C ambient temperature range.
5. The charge current may be reduced by the thermal foldback function, depending on the heatsinking condition of the test setup.
6. The threshold value at which the charger output is reduced to near zero. Guaranteed by characterization or correlation to other test.
Functional Pin Description
CRDL (Pin 1)
Cradle input. This pin is usually connected to a cradle power
input. The maximum input voltage is 28V. The charge
current from this pin is programmable with the ICDL pin up to
1A. 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.
USB (Pin 2)
USB input. This pin is usually connected to a USB port
power connector. Other sources that are lower than 5.5V are
also acceptable. The charge current from the USB pin is
selectable between 100mA and 500mA maximum with the
USBP pin when the R_IUSB = 80kΩ. A 1µF or larger value
ceramic capacitor is recommended for decoupling. It is also
recommended to have a 1Ω resistor in series with the
decoupling capacitor to prevent an over-shoot voltage when
a USB hot plug event occurs.
PPR (Pin 3)
Power presence indication. This is an open-drain output pin
that outputs a logic LOW when either the USB input voltage
or the CRDL input voltage is above its POR level, regardless
if the charger is enabled or disabled. This pin provides a
wake-up signal to a microprocessor when either the cradle
or the USB power is connected.
5
FN9180.1
January 4, 2006