ISL88731CHRTZ Intersil, ISL88731CHRTZ Datasheet - Page 3

• Manufacturer Part Number: ISL88731CHRTZ
• Description: IC BATT CHRGR SMBUS LVL2 28TQFN
• Manufacturer: Intersil

Specifications of ISL88731CHRTZ

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 8 V ~ 26 V
• Operating Temperature: -10°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 28-WFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Pin Descriptions
Pin Configuration
PIN NUMBER
10
11
12
13
15
17
18
19
20
21
2
3
4
6
8
9
VDDSMB
SYMBOL
VCOMP
ICOMP
LGATE
PGND
VDDP
ACOK
CSON
CSOP
VREF
ACIN
GND
SDA
ICM
SCL
VFB
AC Adapter Detection Input. Connect to a resistor divider from the AC adapter output. Range zero to 5.5V.
Reference Voltage output. Range 3.168V to 3.232V. It is internally compensated. Do not connect a decoupling capacitor.
Compensation Point for the charging current and adapter current regulation Loop. Connect 0.01µF to GND. See
“Voltage Control Loop” on page 21 for details on selecting the ICOMP capacitor. Range zero to 5.5V.
Compensation Point for the voltage regulation loop. Connect 4.7kΩ in series with 0.01µF to GND. See “Voltage Control
Loop” on page 21 for details on selecting VCOMP components. Range zero to 5.5V.
Input Current Monitor Output. ICM voltage equals 20 x (V
SMBus Data I/O. Open-drain Output. Connect an external pull-up resistor according to SMBus specifications. Range
zero to 5.5V.
SMBus Clock Input. Connect an external pull-up resistor according to SMBus specifications. Range zero to 5.5V.
SMBus interface Supply Voltage Input. Bypass with a 0.1µF capacitor to GND. Range 3.3V to 5.5V.
Analog Ground. Connect directly to the backside paddle. Connect to the backside paddle and PGND at one point close
to (under) the IC.
AC Detect Output. This open drain output is high impedance when ACIN is greater than 3.2V. The ACOK output remains low
when the ISL88731C is powered down. Connect a 10k pull-up resistor from ACOK to VDDSMB. Range 3.3V to 5.5V.
Feedback for the Battery Voltage. Range 1V to 19V.
Charge Current-Sense Negative Input. Range 1V to 19V.
Charge Current-Sense Positive Input. Range 1V to 19V.
Power Ground. Connect PGND to the source of the low side MOSFET and the negative side of capacitors to the charger output
and the drain of the upper switching FET. Connect this area to the Backside paddle at one location very near (under) the IC.
Low-Side Power MOSFET Driver Output. Connect to low-side N channel MOSFET. LGATE drives between VDDP and
PGND. Range is -0.3V to 5.23V.
Linear Regulator Output. VDDP is the output of the 5.2V linear regulator supplied from DCIN. VDDP also directly
supplies the LGATE driver and the BOOT strap diode. Bypass with a 1µF ceramic capacitor from VDDP to PGND. Range
is 5.0V to 5.23V.
3
VCOMP
ICOMP
VREF
ACIN
NC
NC
NC
1
2
3
4
5
6
7
28
8
ISL88731C
27
9
(28 LD TQFN)
ISL88731C
TOP VIEW
10
26
PD
11
25
12
24
13
23
DESCRIPTION
14
CSSP
22
21
20
19
18
17
16
15
- V
CSSN
VDDP
LGATE
PGND
CSOP
CSON
NC
VFB
). Range zero to 3V.
February 8, 2011
FN6978.2