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Window Detector. CN305 Datasheet |
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CONSONANCE
Low Power Window Detector
CN305
General Description
The CN305 is a single adjustable window detector
with separate under/overvoltage outputs. It
consists of 2 comparators and a voltage reference,
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 comparators’ threshold accuracy is ±2%, and
offers 7.5% hysteresis which 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 CN305 has 2 inputs that can be
configured by the external resistor divider. When
the voltage at OVIN rises above the rising
overvoltage threshold,
goes low. When the
voltage at UVIN falls below the falling under
voltage threshold, is driven to low.
The device has a low quiescent current of 11uA
typical, and offers open-drain outputs.
The device is available in 6 pin SOT23 package.
Applications
Battery-powered Systems
Multi-cell Batteries Monitoring
Window Detector
DSPs, Microcontrollers Applications
Cell Phones and PDAs
Features
Two low power high accuracy comparators
Precise Threshold: ±2%
7.5% Hysteresis to Eliminate the Output
Chatter
Open-Drain Outputs
11µA Supply Current @VCC=3.7V
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
OVIN 1
GND 2
OV 3
CN305
6 UVIN
5 UV
4 VCC
www.consonance-elec.com
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Rev 1.0
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CONSONANCE
Typical Application Circuit
VBAT
4
R1
VCC
1M
6 UVIN
UV 5
R3 CN305
1 OVIN
OV 3
1M
R2 GND
2
UV
OV
Figure 1 Dual-Outputs Window Detector
VBAT
4
R1
VCC
1M
6 UVIN
UV 5
R3 CN305
1 OVIN
OV 3
R2 GND
2
OUT
Figure 2 Single-Output Window Detector
www.consonance-elec.com
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Rev 1.0
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CONSONANCE
Figure 3 Monitor the Voltage Higher Than 6V
Ordering Information：
Part No.
CN305
Package
Shipping
Operating Temperature Range
SOT23-6 Tape and Reel, 3000/Reel
－40℃ to 85℃
www.consonance-elec.com
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Rev 1.0
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