ISL6255 INTERSIL [Intersil Corporation], ISL6255 Datasheet - Page 9

• Manufacturer Part Number: ISL6255
• Description: Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers
• Manufacturer: INTERSIL [Intersil Corporation]

DCIN
The DCIN pin is the input of the internal 5V LDO. Connect it
to the AC adapter output. Connect DCIN to a 0.1µF ceramic
capacitor.
ACSET
ACSET is an AC adapter detection input. Connect to a
resistor divider from the adapter input.
ACPRN
ACPRN is an AC adapter present open drain output.
ACPRN is active low when ACSET is higher than typically
1.26V, and active high when ACSET is lower than typically
1.26V.
DCSET
DCSET is a lower voltage adapter detection input (like
aircraft power 15V). This allows to power the system, but not
to charge the battery.
DCPRN
DCPRN is a DC adapter present open drain output. DCPRN
is active low when DCSET is higher than typically 1.26V, and
active high when DCSET is lower than typically 1.26V.
EN
EN is the Charge Enable input. Connecting EN to high
enables the charge control function, connecting EN to low
disables charging functions. Use with a thermistor to detect
a hot battery and suspend charging.
ICM
ICM is the adapter current output. The output of this pin
produces a voltage proportional to the adapter current.
PGND
PGND is the power ground. Connect PGND to the source of
the low side MOSFET.
VDD
VDD is an internal LDO output to supply IC analog circuit.
Connect a 1µF ceramic capacitor to ground.
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ISL6255, ISL6255A
VDDP
VDDP is the supply voltage for the low-side MOSFET gate
driver. Connect a 4.7Ω resistor to VDD and a 1µF ceramic
capacitor to power ground.
ICOMP
ICOMP is a current loop error amplifier output.
VCOMP
VCOMP is a voltage loop amplifier output.
CELLS
This pin is used to select the battery voltage. CELLS=VDD
for a 4S battery pack, CELLS=GND for a 3S battery pack,
CELLS=Float for a 2S battery pack.
VADJ
VADJ adjusts battery regulation voltage. VADJ=VREF for
4.2V+5%/cell; VADJ=Floating for 4.2V/cell; VADJ=GND for
4.2V-5%/cell. Connect to a resistor divider to program the
desired battery cell voltage between 4.2V-5% and 4.2V+5%.
CHLIM
CHLIM is the battery charge current limit set pin.CHLIM input
voltage range is 0.1V to 3.6V. When CHLIM=3.3V, the set
point for CSOP-CSON is 165mV. The charger shuts down if
CHLIM is forced below 88mV.
ACLIM
ACLIM is the adapter current limit set pin. ACLIM=VREF for
100mV, ACLIM=Floating for 75mV, and ACLIM=GND for
50mV. Connect a resistor divider to program the adapter
current limit threshold between 50mV and 100mV.
VREF
VREF is a 2.39V reference output pin. It is internally
compensated. Do not connect a decoupling capacitor.
June 17, 2005
FN9203.1