ISL6256AHAZ Intersil, ISL6256AHAZ Datasheet - Page 12

• Manufacturer Part Number: ISL6256AHAZ
• Description: IC BATTERY CHARGER CTRLR 28-QSOP
• Manufacturer: Intersil

Specifications of ISL6256AHAZ

• 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.
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
12
FIGURE 16. TRICKLE TO FULL-SCALE CHARGING
DCIN = 20V, 4S2P Li-Battery, T
ISL6256, ISL6256A
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.
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.
A
= +25°C, Unless Otherwise Noted. (Continued)
CHARGE
CURRENT
1A/div
CHLIM
1V/div
September 14, 2010
FN6499.3