ISL6299 Datasheet, PDF (5/8 Pages) Intersil Corporation – Li-ion/Li-Polymer Battery Charger Accepting Two Power Sources

ISL6299
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.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
PRECONDITIONING CHARGE THRESHOLD
Preconditioning Charge Threshold Voltage
INTERNAL TEMPERATURE MONITORING
V_MIN
2.5
2.6
2.7
V
Current Foldback Threshold (Note 7)
LOGIC INPUT AND OUTPUT
T_FOLD
85
100
115
°C
USBON Logic input High
1.3
-
-
V
USBON Logic input LOW
-
-
0.4
V
EN Pin Logic Input High
1.3
-
-
V
EN Pin Logic Input Low
-
-
0.4
V
EN Pin Internal Pull Down Resistance
-
600
-
kΩ
USBON Pin internal Pull Down Resistance
-
1000
-
kΩ
CHG/PPR Sink Current
Pin Voltage = 0.8V
10
-
-
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 can be affected by the thermal foldback function if the IC under the test setup cannot dissipate the heat.
6. Constant current can be affected if the junction temperature exceeds 70 °C
7. This parameter is guaranteed by design, not tested
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
fixed at typically 380mA. 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 cable is plugged in.
PPR (Pin 3)
Power presence indication. An open-drain output pin which
turns ON when either the USB input voltage or the CRDL
input voltage is above its POR level, regardless if the
charger is enabled or disabled. Otherwise turns OFF. This
pin provides a wake-up signal to a microprocessor when
either the cradle or the USB power is connected.
CHG (Pin 4)
Charge indication pin. An open-drain output which turns ON
when the charge current from the cradle input is above
programmable IMIN or when the charge current from the
USB input is above the fixed end of charge current
threshold. Otherwise turns OFF.
EN (Pin 5)
Enable logic input. Connect to LOW or leave floating to
enable the charger.
IMIN (Pin 6)
IMIN is the programmable input for the end-of-charge
current. IMIN is calculated by the following equation:
I_MIN
=
-¹---⁴---⁴----⁷---⁸-- – 4
R_IMIN
(mA)
Where R_IMIN is in kΩ. IMIN is only applicable to the cradle
charging. The USB EOC current has been fixed as shown on
the electrical specification table.
USBON (Pin 7)
The USBON pin is a control input to turn off the USB charge
function if desired. Connect to LOW or leave floating to turn
off USB charge.
5
FN9184.0
March 17, 2005