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CN3722 Datasheet Preview

CN3722 Datasheet

Multi-Chemistry Battery Charger IC

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5A, Multi-Chemistry Battery Charger IC
With Photovoltaic Cell MPPT Function
CN3722
General Descriptions:
The CN 3722(Note 1) is a PWM switc h-mode
battery charger controller that ca n be powere d
by ph otovoltaic cell w ith maximum p ower
point tra cking fu nction. The CN 3722 is
specially designed for charging 1 or m ulti-cell
lithium ion batteries or LiFePO4 batteries with
constant current and constant voltage mode. In
constant v oltage mode, th e regulation v oltage
is set by the ex ternal res istor d ivider. The
constant c harging c urrent is pro grammable
with a single current sense resistor.
Deeply discharged batteries are automatically
trickle charged at 15% of the programmed
constant charging current until the cell voltage
exceeds 66.7% of the regulation voltage. In
constant voltage mode, the charging current
decreases gradually, the charge cycle will be
terminated when the charging current drops to
9.5% of the full-scale current, and a new
charge cycle automatically restarts if the
battery voltage falls below 95.8% of the
regulation voltage in constant voltage mode.
CN3722 will automatically enter sleep mode
when input voltage is lower than battery
voltage. Other features include undervoltage
lockout, battery temperature monitoring and
status indication, etc.
CN3722 is available in a space-saving 16-pin
TSSOP package.
Applications:
The Charger Powered by Photovotaic cell
Electric Tools
Battery-Backup Systems
Standalone Battery Chargers
Note 1: Patent Pending
Features:
Photovoltaic Cell Ma ximum Power
Point Tracking
Wide Input Voltage: 7.5V to 28V
Complete Ch arger C ontroller for 1
or multi-cell Lithium-ion Battery or
LiFePO4 Battery
Charge Current Up to 5A
High PWM Switching Fr equency:
300KHz
Constant Charging V oltage Se t By
the External Resistor Divider
Charging Current is programmed
with a sense resistor
Automatic C onditioning of Deeply
Discharged Batteries
Battery Temperature Monitoring
2 Status Indications
Soft Start
Battery Overvoltage Protection
Operating Ambient Temperature
40to 85
Available in 16 Pin TSSOP Package
Pb-free , RoHS Compliant,
and Halogen Free
Pin Assignment:
VG 1
PGND 2
GND 3
CHRG 4
DONE 5
TEMP 6
MPPT 7
COM1 8
CN3722
16 DRV
15 VCC
14 BAT
13 CSP
12 NC
11 COM3
10 FB
9 COM2
www.consonance-elec.com
Rev.1.1
1
http://www.Datasheet4U.com




CONSONANCE

CN3722 Datasheet Preview

CN3722 Datasheet

Multi-Chemistry Battery Charger IC

No Preview Available !

CONSONANCE
Typical Application Circuit:
Input Power Supply
C1
D1
M1
C5
R1
D3
R8
R3
1
VG
15 VCC
R5
16
DRV
CSP 13
BAT 14
D4 CN3722 NC 12
4 CHRG
5 DONE
7 MPPT
6 TEMP
FB 10
COM2 9
COM1 8
COM3 11
R2
NT C
GND PGND
32
C2
L
D2
RCS
R7
R4
C3 C4
R6
C6 BAT
C7
Figure 1 T ypical Application Circuit
Ordering Information:
Part No.
CN3722
Operating Ambient Temperature
40to 85
Constant Charging Voltage
Set By External Resistor Divider
www.consonance-elec.com
Rev.1.1
2


Part Number CN3722
Description Multi-Chemistry Battery Charger IC
Maker CONSONANCE
Total Page 12 Pages
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