Battery Monitor. CN302 Datasheet

CN302 Monitor. Datasheet pdf. Equivalent


CONSONANCE CN302
CONSONANCE
Low Power Battery Monitor with Hysteresis Control
CN302
General Description
The CN302 is an low power high accuracy battery
monitor with hysteresis control, and is specially
designed for monitoring single or multi
lithium-ion (Li+) cells, multi-cell alkaline, NiCd,
NiMH and multi-cell lead acid batteries.
The CN302 allows for wide hysteresis by
adjusting the rising and falling threshold
independently. The threshold accuracy is ±2%.
The hysteresis eliminates the output chatter
sometimes associated with battery voltage
monitors, usually due to input voltage noise or
battery terminal voltage recovery after load
removal.
The device offers both active-low and active-high
battery detection outputs.
The device is available in 6 pin SOT23 package.
Applications
Battery-powered Systems
Multi-cell Li+ Batteries Monitoring
Multi-cell Alkaline, NiCd or NiMH Batteries
Monitoring
Multi-cell Lead Acid Batteries Monitoring
Features
Precise Threshold: ±2%
Adjustable Hysteresis to Eliminate the
Output Chatter
Active-low and Active-high CMOS Outputs
9.5µA Supply Current @VCC=3V
Power Supply Transient Immunity
Operating Temperature Range
-40°C to +85°C
Available in SOT23-6
Lead-free, Rohs-compliant and Halogen-free
Pin Assignment
FTH 1
GND 2
LBO 3
CN302
6 RTH
5 LBO
4 VCC
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1
Rev 1.0


CN302 Datasheet
Recommendation CN302 Datasheet
Part CN302
Description Low Power Battery Monitor
Feature CN302; CONSONANCE Low Power Battery Monitor with Hysteresis Control CN302 General Description The CN302 i.
Manufacture CONSONANCE
Datasheet
Download CN302 Datasheet




CONSONANCE CN302
CONSONANCE
Typical Application Circuit
VBAT
4
R1 VCC
1 FTH
LBO 3
R3 CN302
6 RTH
LBO 5
R2 GND
2
Figure 1 Monitoring Battery Voltage Lower Than 6V
VBAT
R1
1.9V to 6V
4
VCC
1 FTH
LBO 3
R3 CN302
6 RTH
LBO 5
R2 GND
2
Figure 2 Monitoring Battery Voltage Higher Than 6V
Ordering Information
Part No.
CN302
Package
Shipping
Operating Temperature Range
SOT23-6 Tape and Reel, 3000/Reel
40to 85
www.consonance-elec.com
1.0
2
Rev



CONSONANCE CN302
CONSONANCE
Pin Description
Pin No.
Symbol
1 FTH
2 GND
3 LBO
4 VCC
5
6 RTH
Description
Falling Threshold Input. Generally FTH pin should be tied to an
external resistor divider to sense the battery voltage.
Negative Terminal of Power Supply(Ground)
Active-High Low Battery Output. CMOS output. When the
voltage at RTH pin rises above the internal reference voltage,
LBO becomes low; When the voltage at FTH pin falls below the
internal reference voltage, LBO becomes high.
Positive Terminal of Power Supply. This pin is the power supply
to internal circuit.
Active-Low Low Battery Output. CMOS output. When the
voltage at RTH pin rises above the internal reference voltage,
becomes high; When the voltage at FTH pin falls below the
internal reference voltage,
becomes low.
Rising Threshold Input. Generally RTH pin should be tied to an
external resistor divider to sense the battery voltage.
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (With respect to GND)
VCC..............…...…......-0.3V to +6.5V
The other Pins……..…....-0.3V to VCC
Input/Output Current
All Pins……………….................20mA
Thermal Resistance……………………..300°C/W
Operating Temperature.…….……...-40 to +85°C
Storage Temperature.......…….......-65 to +150°C
Lead Temperature (soldering, 10s) ..........+260°C
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 beyond
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.
Electrical Characteristics
(VCC=3V, TA= 40to 85, Typical values are at TA=25, unless otherwise noted.)
Parameters
Symbol
Test Conditions
Min Typ Max
Operating Voltage
Range
VCC
1.9 6
VCC1.8V
4.4 8.8
14
Operating Current
IVCC VCC3.0V
VCC5.0V
5 9.5 14
5 10 15
RTH Threshold
FTH Threshold
RTH Bias Current
FTH Bias Current
VRTH
VFTH
IRTH
IFTH
RTH pin voltage rising
FTH pin voltage falling
1.187
1.187
100
100
1.211
1.211
0
0
1.235
1.235
100
100
Unit
V
uA
V
nA
nA
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3
Rev 1.0







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