NCP1800 ON, NCP1800 Datasheet - Page 2

• Manufacturer Part Number: NCP1800
• Description: Single-Cell Lithium Ion Battery Charge Controller
• Manufacturer: ON

PIN FUNCTION DESCRIPTIONS
Pin
1
2
3
4
5
6
7
8
R
ISEL
ISEL
CFLG
COMP/DIS
C
Symbol
in
CFLG
V
GND
ISEL
OUT
I
V
SNS
SNS
CC
V
REF
V
V
V
CC
REF
This is one of the inputs to the current regulator and the end-of-charge comparator.
A resistor from this pin to ground pin sets the full charging current regulation level.
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.
This is the ground pin of the IC.
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.
An open drain output that indicates the battery charging status.
This is a multifunctional pin that powers the device and senses for over and undervoltage conditions.
This is a current source driver for the pass transistor.
Enable
REF
Active Pullup
Chip
V
I
REF
REF
Input UV
Lockout
Input OV
Lockout
GND
Figure 2. NCP1800 Internal Block Diagram
LOGIC
CONTROL
http://onsemi.com
NCP1800
OUT
2
COMP/DIS
Pre CHG
Complete
V
Overvoltage
SNS
EOC
Detect
CC
CV
Description
V
REF
EOC REF
V
V
REF
REF
I
SNS
R
SNS
V
SNS
C
out