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NCP1800 Datasheet(PDF) 2 Page - ON Semiconductor

Part # NCP1800
Description  Single-Cell Lithium Ion Battery Charge Controller
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1800 Datasheet(HTML) 2 Page - ON Semiconductor

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NCP1800
http://onsemi.com
2
EOC
Detect
Pre CHG
Complete
VSNS
Overvoltage
GND
COMP/DIS
CFLG
RISEL
ISEL
VCC
ISNS
EOC REF
Input UV
Lockout
Input OV
Lockout
IREF
OUT
Figure 2. NCP1800 Internal Block Diagram
VSNS
CC
CV
VREF
Chip
Enable
VREF
VREF
VREF
VREF
VREF
LOGIC
Cin
Active Pullup
VREF
RSNS
Cout
CONTROL
PIN FUNCTION DESCRIPTIONS
Pin
Symbol
Description
1
ISNS
This is one of the inputs to the current regulator and the end−of−charge comparator.
2
ISEL
A resistor from this pin to ground pin sets the full charging current regulation level.
3
COMP/DIS
This is a multifunctional pin that is used for compensation and can be used to interrupt charge with an open
drain/collector output from a microcontroller. When this pin is pulled to ground, the charge current is interrupted.
4
GND
This is the ground pin of the IC.
5
VSNS
This is an input that is used to sense battery voltage and is the other input to the current regulator. It also serves
as the input to the battery overvoltage comparator.
6
CFLG
An open drain output that indicates the battery charging status.
7
VCC
This is a multifunctional pin that powers the device and senses for over and undervoltage conditions.
8
OUT
This is a current source driver for the pass transistor.


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