ISL6295CVZ Intersil, ISL6295CVZ Datasheet - Page 4

• Manufacturer Part Number: ISL6295CVZ
• Description: IC FUEL GAUGE LOW VOLTAGE8-TSSOP
• Manufacturer: Intersil

Specifications of ISL6295CVZ

• Function: Fuel, Gas Gauge/Monitor
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 2.8 V ~ 7 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP
• Battery Management Function: Fuel Gauge
• Supply Voltage Range: 2.8V To 7V
• Interface Type: 2-Wire, Serial, I2C
• Battery Ic Case Style: TSSOP
• No. Of Pins: 8
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Pin Descriptions
GPAD/IO1 (Pin 1)
General purpose A/D input or general purpose input/output
pin. Grounded if not used.
VP (Pin 2)
Cell input connection for the positive terminal of the Li-Ion
cell. Connects to the positive terminal of 1-cell series packs.
VP serves as the power supply input for the ISL6295.
SCL (Pin 3)
SMBus/I
SDA (Pin 4)
SMBus/I
ROSC (Pin 5)
External bias resistor. 221kΩ (±0.1%) oscillator reference
setting resistor connected between this pin and GND.
NTC/IO0 (Pin 6)
Connection for an external temperature sensor using a
thermistor. Can also be configured as an open drain general
purpose input/output pin. Grounded if not used.
GND (Pin 7)
Analog and digital ground
SR (Pin 8)
Current measurement A/D input. Connects to the other
terminal of a grounded current sense resistor.
J2
Cell -
Cell +
1
1
2
2
C™ clock line connection
C™ data line connection
PLACE THERMAL
FUSE NEXT TO Q1
ON PCB LAYOUT
F1
R1
1K
C1
100nF
5
4
6
2
3
4
U2
MM3077DN
VDD
DS
VSS
DOUT
COUT
V-
FIGURE 1. ISL6295 APPLICATIONS SCHEMATIC
Q1
SI6880EDQ
6
7
2
3
1
Note: Connect NTC pin to ground if thermister is not used
R2
1K
t
ISL6295
RT1
THERMISTOR
100nF
C2
221K 0.1%
1.0nF
Theory of Operation
The ISL6295 contains a complete analog "front-end" for
battery monitoring as well as digital logic for control,
measurement accumulation, timing, and communications.
Major functions within the ISL6295 include:
• Voltage Regulator
• Precision Time Base
• Temperature Sensor
• 256 Byte NV-EEPROM
• 32 Byte general purpose SRAM
• Analog-to-Digital (A/D) Converter
• 32-bit Accumulators/Timers
• SMBus/I
Figure 2 is a block diagram of the internal circuitry of the
ISL6295. Figure 1 is a schematic diagram that depicts the
ISL6295 in a typical single cell Lithium-ion application. The
function of each of the blocks listed above is summarized in
the following sections.
C3
R4
2
2
6
5
1
7
C™ Communications Interface
U1
ISL6295
VP
NTC
ROSC
GPAD
GND
R5
0.020 1%
SDA
SCL
SR
3
4
8
CMSZDA5V6
D1
R6
R7
680
680
February 8, 2011
FN9074.2
J3B+
J4 C
J5D
J6 B
1
1
1
1