MP2606 MPS, MP2606 Datasheet - Page 7

• Manufacturer Part Number: MP2606
• Description: Single-cell 1a Linear Li-ion Battery Charger Without Trickle Charge
• Manufacturer: MPS

4.2V
Charge
Battery Over-Voltage Protection and
Automatic Recharge
At any time when V
trimmed charge target, the MP2606 reduces its
charge current to 0µA. This ensures the safety
of the battery. Also, the CV control loop always
monitors the battery voltage such that it will
automatically recharge the battery when it is
depleted below the target level.
Programming of Charge Current and Battery
Full Current
The charge current (I
(R
The relationship of the charge current and the
programming resistance is established by the
following table and graph.
MP2606 Rev. 0.1
1/17/2008
Figure 2—MP2606 Typical Charging Profile
Start
CHG
V
BATT
Figure 3—MP2606 Typical Charging
Soft-Start
Time
) connecting from the ISET pin to GND.
10% of I
Mode
I
CC
CHG
CHG
I
BFL
I
MP2606 – SINGLE CELL 1A LINEAR LI-ION BATTERY CHARGER W/O TRICKLE CHARGE
BATT
Procedure
BATT
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
V
I
BATT
CHG
Mode
BATT
CV
2.6V
is 50mV higher than the
CHG
) is set by a resistor
Charging
CC
Charge
End
4.2V
I
BATT
Charging
Complete
CV
Charging
I
90% of I
10% of I
CHG
V
BATT
© 2008 MPS. All Rights Reserved.
CHG
CHG
www.MonolithicPower.com
(I
BFL
)
Table 1—R
The recommended resistance for programming
the charge current is 2.3kΩ<R
battery full charge current threshold (I
programmed by connecting a resistor R
the IBFL pin to GND:
Where 2R
the battery full condition is reached or any other
condition prevents the charger from charging,
CHG
CHG
Figure 4—Charge Current vs 1/R
is used to indicate charging status. When
will become a floating pin.
1000
900
700
500
400
300
200
100
800
600
CHG
R
(2)
0
(1)
CHG
0.00
CHG
Charge Current vs
1/R
<R
1.82
2.16
3.32
4.32
8.45
2.5
7.5
10
2
5
and I
1/R
(kΩ)
BFL
CHG
0.10
Resistance
I
CHG
I
BFL
<10R
BFH
CHG
0.20
Resistance
=
=
1A
1A
CHG
Relationship
R
0.30 0.40
BFH
I
CHG
×
. The open-drain pin
R
×
1.7kΩ
//R
1.7kΩ
913
835
778
677
521
410
357
236
208
176
BFL
(mA)
BFL
CHG
0.50
<11kΩ. The
0.60
CHG
BFL
BFL
from
) is
7