ISL94201IRZ Intersil, ISL94201IRZ Datasheet - Page 2

• Manufacturer Part Number: ISL94201IRZ
• Description: IC MULTI LI-ION AFE 24-QFN
• Manufacturer: Intersil

Specifications of ISL94201IRZ

• Function: Over/Under Voltage Protection
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 5 V ~ 10 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin Descriptions
Functional Diagram
SYMBOL
VC7/VCC
TEMP3V
VCELLN
TEMPI
WKUP
RGO
RGC
SDA
VSS
SCL
AO
VC7/VCC
VCELL6
VCELL5
VCELL4
VCELL3
VCELL2
VCELL1
Battery cell 7 voltage input/VCC supply. This pin is used to monitor the voltage of this battery cell externally at pin AO. This pin also
provides the operating voltage for the IC circuitry.
Battery cell N voltage input. This pin is used to monitor the voltage of this battery cell externally at pin AO. VCELLN connects to the
positive terminal of CELLN and the negative terminal of CELLN + 1.
Ground. This pin connects to the most negative terminal in the battery string.
Analog multiplexer output. The analog output pin is used by an external microcontroller to monitor the cell voltages and temperature
sensor voltages. The microcontroller selects the specific voltage being applied to the output by writing to a control register.
Temperature monitor output control. This pin outputs a voltage to be used in a divider that consists of a fixed resistor and a
thermistor. The thermistor is located in close proximity to the cells. The TEMP3V output is connected internally to the RGO voltage
through a PMOS switch only during a measurement of the temperature, otherwise the TEMP3V output is off. The TEMP3V output can
be turned on continuously with a special control bit.
Microcontroller wake up control.
Temperature monitor input. This pin inputs the voltage across a thermistor to determine the temperature of the cells. When this input
drops below TEMP3V/13, an external over-temperature condition exists. The TEMPI voltage is also fed to the AO output pin through
an analog multiplexer so the temperature of the cells can be monitored by the microcontroller.
Regulated output voltage. This pin connects to the emitter of an external NPN transistor and works in conjunction with the RGC pin
to provides a regulated 3.3V. The voltage at this pin provides feedback for the regulator and power for many of the ISL94201internal
circuits as well as providing the 3.3V output voltage for the microcontroller and other external circuits.
Regulated output control. This pin connects to the base of an external NPN transistor and works in conjunction with the RGO pin to
provide a regulated 3.3V. The RGC output provides the control signal for the external transistor to provide the 3.3V regulated voltage
on the RGO pin.
Wake up Voltage. This input wakes up the part when the voltage crosses a turn-on threshold (wake up is edge triggered). The
condition of the pin is reflected in the WKUP bit (The WKUP bit is level sensitive.)
WKPOL bit = ”1”: the device wakes up on the rising edge of the WKUP pin. Also, the WKUP bit is HIGH only when the WKUP pin
voltage > threshold.
WKPOL bit = ”0”, the device wakes up on the falling edge of the WKUP pin. Also, the WKUP bit is HIGH only when the WKUP pin
voltage < threshold.
Serial Data. This is the bidirectional data line for an I
Serial Clock. This is the clock input for an I
BACKUP
SUPPLY
SHIFTERS
LEVEL
VSS
2
CELL
VOLTAGES
2
C communication link.
7
ISL94201
2
MUX
C interface.
AO
DESCRIPTION
REGISTERS
SCL
CONTROL
I
2
2
LOGIC
OSC
C I/F
SDA
SENSOR, INT/EXT
TEMPERATURE
REGULATOR
COMPARATOR
TEMPI
EXT TEMP
3.3VDC
ENABLE
CONTROL
POWER
TEMP3V
WKUP
RGC
RGO
July 3, 2008
FN6719.0