MP2606 MPS, MP2606 Datasheet - Page 6

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

BLOCK DIAGRAM
OPERATION
Input Voltage Range
The MP2606 has built-in input voltage surge
protection as high as +28V. The charger IC will
be automatically disabled when the input
voltage is lower than 2.5V or higher than 7.0V.
The open-drain pin
an
2.5V<V
than the battery voltage, the IC is also disabled
to prevent the battery from draining.
MP2606 Rev. 0.1
1/17/2008
input
IN
<7.0V). If the input voltage is lower
power
MP2606 – SINGLE CELL 1A LINEAR LI-ION BATTERY CHARGER W/O TRICKLE CHARGE
R
R
CHG
C
BFL
SS
R
BFH
ACOK
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
good
I
I
OFF ON
I
BFH
SET
SS
BFL
is used to indicate
5
7
9
8
condition
Figure 1—Functional Block Diagram
EN
© 2008 MPS. All Rights Reserved.
CONTROL
BATTERY
CHARGE
4
www.MonolithicPower.com
(i.e.
6
GND
IN
Charge Cycle (Mode Change: CC-> CV)
Figure 2 below shows the typical charging
profile for the MP2606. Figure 3 shows the
typical charging procedure. For a depleted
battery the MP2606 will start with the constant
current of the programmed value (I
referred to as Constant Current (CC) mode.
Once the battery voltage reaches 4.2V, the
charger will operate in the constant voltage (CV)
mode until the battery is fully charged. The
charge current drops during CV mode, and the
battery full indication is set when the charge
current in the CV mode is reduced to the
programmed full battery current (I
battery full is asserted, the output current needs
to reach I
status.
The MP2606 can start up with heavy load and
is stable without a battery connected to the
BATT pin.
1
10
2
3
BATT
CHG
ACOK
BFH
C
I
IN
BATT
threshold to re-assert ”In-charge”
V
IN
+
V
_
BATT
C
OUT
CHG
BFL
). This is
). After
6