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

部品番号

コンポーネント説明

メーカー

ISL6255

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

Renesas Electronics 

ISL6255, ISL6255A

Typical Operating Performance DCIN = 20V, 4S2P Li-Battery, TA = 25°C, unless otherwise noted. (Continued)

ADAPTER REMOVAL

SGATE-CSIP

2V/div

SYSTEM BUS

VOLTAGE

10V/div

BGATE-CSIP

2V/div

INDUCTOR

CURRENT

2A/div

FIGURE 11. SWITCHING WAVEFORMS AT DIODE EMULATION

BGATE-CSIP

2V/div

SYSTEM BUS

VOLTAGE

10V/div

ADAPTER INSERTION

SGATE-CSIP

2V/div

INDUCTOR

CURRENT

2A/div

FIGURE 12. SWITCHING WAVEFORMS IN CC MODE

CHARGE

CURRENT

1A/div

CHLIM

1V/div

FIGURE 13. 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.

SGATE

SGATE is the AC adapter power source select output. The

SGATE pin drives an external P-MOSFET used to switch to AC

adapter as the system power source.

BGATE

Battery power source select output. This pin drives an external

P-channel MOSFET used to switch the battery as the system

power source. When the voltage at CSON pin is higher than

the AC adapter output voltage at DCIN, BGATE is driven to low

and selects the battery as the power source.

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.

FN9203 Rev 2.00

May 23, 2006

Page 8 of 22

Share Link: