NCP300 ONSEMI [ON Semiconductor], NCP300 Datasheet - Page 16

• Manufacturer Part Number: NCP300
• Description: Voltage Detector Series
• Manufacturer: ONSEMI [ON Semiconductor]

Device Thresholds
Device Thresholds
The above circuit combines an active high and an active low reset output device to form
a window detector for monitoring battery or power supply voltages. When the input
voltage falls outside of the window established by the upper and lower device
thresholds, the LED will turn on indicating a fault. As the input voltage falls within the
window, increasing from 1.0 V and exceeding the active low device’s hysteresis
threshold, or decreasing from the peak towards 1.0 V and falling below the active high
device’s undervoltage threshold, the LED will turn off. The device thresholds shown can
be used for a single cell lithium−ion battery charge detector.
Active High
Active Low
2.85 V
2.70 V
1.0 V
10 V
Fault
UV
NCP300
Series
2
3
Input
GND
OK
1
Reset Output
Fault
LSN27T1
OV
APPLICATION CIRCUIT INFORMATION
NCP300
Figure 22. Microprocessor Reset Circuit
2
3
Figure 24. Window Voltage Detector
Figure 23. Battery Charge Indicator
Input
GND
NCP300, NCP301
Fault
*
http://onsemi.com
1
Reset Output
OV
Required for
NCP301
*
OK
16
Input
Fault
UV
Reset
Microprocessor
V
V
in
in
< 2.7 ON
> 2.835 ON
GND
V
LSN23T1
HSN43T1
NCP301
NCP301
DD
2
3
2
3
UV
OV
Input
GND
Input
GND
To Additional Circuitry
V
DD
1
Reset Output
1
Reset Output
V
supply
Output
Fault