ISL6255 データシートの表示（PDF） - Renesas Electronics

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ISL6255

Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers

Renesas Electronics 

ISL6255, ISL6255A

DCIN

The DCIN pin is the input of the internal 5V LDO. Connect it to

the AC adapter output. Connect a 0.1µF ceramic capacitor

from DCIN to CSON.

ACSET

ACSET is an AC adapter detection input. Connect to a resistor

divider from the AC adapter output.

ACPRN

Open-drain output signals AC adapter is present. ACPRN pulls

low when ACSET is higher than 1.26V; and pulled high when

ACSET is lower than 1.26V.

DCSET

DCSET is a lower voltage adapter detection input (like aircraft

power 15V).Allows the adapter to power the system where

battery charging has been disabled.

DCPRN

Open-drain output signals DC adapter is present. DCPRN pulls

low when DCSET is higher than 1.26V; and pulled high when

DCSET is lower than 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 1F ceramic capacitor to ground.

VDDP

VDDP is the supply voltage for the low-side MOSFET gate

driver. Connect a 4.7 resistor to VDD and a 1F 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.

FN9203 Rev 2.00

May 23, 2006

Page 9 of 22

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