Data Sheet

REV 1.1 4
Pin Description
Pin No. Name Function Description
1 TEMP
Temperature Sense Input. Connecting TEMP pin to NTC thermistor’s
output in Lithium ion battery pack. If TEMP pin’s voltage is below 46% of
input supply voltage V
IN
for more than 0.15S, this means that battery’s
temperature is too high or too low, charging is suspended. If TEMP’s voltage
level is above 46% of input supply voltage for more than 0.15S, battery fault
state is released, and charging will resume.
The temperature sense function can be disabled by grounding the TEMP pin.
2 ISET
Constant Charge Current Setting and Charge Current Monitor Pin. The
charge current is set by connecting a resistor R
ISET
from this pin to GND.
When in precharge mode, the ISET pin’s voltage is regulated to 0.2V. When in
constant charge current mode, the ISET pin’s voltage is regulated to 2V. In all
modes during charging, the voltage on ISET pin can be used to measure the
charge current as follows:
I
CH
= (V
ISET
／R
ISET
)×900
3 GND
Ground Terminal.
4 VIN
Positive Input Supply Voltage. V
IN
is the power supply to the internal circuit.
When V
IN
drops to within 40mv of the BAT pin voltage, CN3083 enters low
power sleep mode, dropping BAT pin’s current to less than 3uA.
5 BAT
Battery Connection Pin. Connect the positive terminal of the battery to BAT
pin. BAT pin draws less than 3uA current in chip disable mode or in sleep
mode. BAT pin provides charge current to the battery and provides regulation
voltage of 4.2V.
6 OK
Open-Drain Charge termination Status Output. In charge termination
status, OK is pulled low by an internal switch; Otherwise OK pin is in high
impedance state.
7 CH
Open Drain Charge Status Output. When the battery is being charged, the
CH pin is pulled low by an internal switch, otherwise CH pin is in high
impedance state.
8 FB
Battery Voltage Kevin Sense Input. This Pin can Kelvin sense the battery
voltage; Also the regulation voltage in constant voltage mode can be adjusted
by connecting an external resistor between FB pin and BAT pin.
Absolute Maximum Ratings
All Terminal Voltage……………－0.3V to 6.5V Maximum Junction Temperature…...150℃
BAT Short-Circuit Duration………...Continuous Operating Temperature…...－40℃ to 85℃
Storage Temperature….............－65℃ to 150℃ Thermal Resistance (SOP8)………….TBD
Lead Temperature(Soldering)…….............300℃
Stresses beyond those listed under ‘Absolute Maximum Ratings’ may cause permanent damage to the device. These are stress
ratings only and functional operation of the device at these or any other conditions above those indicated in the operational
sections of the specifications is not implied. Exposure to Absolute Maximum Rating Conditions for extended periods may affect
device reliability.