ISL6252HRZ データシートの表示（PDF） - Renesas Electronics

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ISL6252HRZ

Highly Integrated Battery Charger Controller for Notebook Computers

Renesas Electronics 

ISL6252, ISL6252A

Typical Operating Performance DCIN = 20V, 4S2P Li-Battery, TA = +25°C, Unless Otherwise Noted. (Continued)

CHARGE

CURRENT

1A/div

CHLIM

1V/div

FIGURE 16. TRICKLE TO FULL-SCALE CHARGING

Functional Pin Descriptions

BOOT

Connect BOOT to a 0.1µF ceramic capacitor to PHASE pin

and connect to the cathode of the bootstrap Schottky diode.

UGATE

UGATE is the high side MOSFET gate drive output.

LGATE

LGATE is the low side MOSFET gate drive output; swing

between 0V and VDDP.

PHASE

The Phase connection pin connects to the high side MOSFET

source, output inductor, and low side MOSFET drain.

CSOP/CSON

CSOP/CSON is the battery charging current sensing

positive/negative input. The differential voltage across CSOP

and CSON is used to sense the battery charging current, and

is compared with the charging current limit threshold to

regulate the charging current. The CSON pin is also used as

the battery feedback voltage to perform voltage regulation.

CSIP/CSIN

CSIP/CSIN is the AC adapter current sensing positive/negative

input. The differential voltage across CSIP and CSIN is used to

sense the AC adapter current, and is compared with the AC

adapter current limit to regulate the AC adapter current.

GND

GND is an analog ground.

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.

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.

VDDP

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

driver. Connect a 4.7 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

FN6498 Rev 3.00

Aug 25, 2010

Page 11 of 25

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