ISL6255AHAZ Intersil, ISL6255AHAZ Datasheet - Page 8

• Manufacturer Part Number: ISL6255AHAZ
• Description: IC BATTERY CHARGER CTRLR 28-QSOP
• Manufacturer: Intersil

Specifications of ISL6255AHAZ

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 7 V ~ 25 V
• Operating Temperature: -10°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP (0.150", 3.95mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Operating Performance
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.
FIGURE 11. SWITCHING WAVEFORMS AT DIODE EMULATION
ADAPTER REMOVAL
ADAPTER REMOVAL
8
FIGURE 13. TRICKLE TO FULL-SCALE CHARGING
SGATE-CSIP
SGATE-CSIP
SGATE-CSIP
2V/div
2V/div
2V/div
SYSTEM BUS
SYSTEM BUS
SYSTEM BUS
VOLTAGE
VOLTAGE
VOLTAGE
10V/div
10V/div
10V/div
BGATE-CSIP
BGATE-CSIP
BGATE-CSIP
2V/div
2V/div
2V/div
DCIN = 20V, 4S2P Li-Battery, T
INDUCTOR
INDUCTOR
INDUCTOR
CURRENT
CURRENT
CURRENT
2A/div
2A/div
2A/div
ISL6255, ISL6255A
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.
FIGURE 12. SWITCHING WAVEFORMS IN CC MODE
A
= 25°C, unless otherwise noted. (Continued)
ADAPTER INSERTION
ADAPTER INSERTION
CHARGE
CURRENT
1A/div
CHLIM
1V/div
SGATE-CSIP
SGATE-CSIP
SGATE-CSIP
2V/div
2V/div
2V/div
SYSTEM BUS
SYSTEM BUS
SYSTEM BUS
VOLTAGE
VOLTAGE
VOLTAGE
10V/div
10V/div
10V/div
INDUCTOR
INDUCTOR
INDUCTOR
CURRENT
CURRENT
CURRENT
2A/div
2A/div
2A/div
BGATE-CSIP
BGATE-CSIP
BGATE-CSIP
2V/div
2V/div
2V/div
May 23, 2006
FN9203.2