MP2605 MPS, MP2605 Datasheet - Page 11

• Manufacturer Part Number: MP2605
• Description: 1A Li-Ion/Li-Polymer Battery Charger
• Manufacturer: MPS

Charger Status Indication
The MP2605 has an integrated charge status pin
that remains low while the battery is charging.
Once the charge current threshold (I
reached,
impedance.
For different operation state, CHG indication is as
Table 2 shows.
MP2605 Rev. 0.94
1/25/2010
ACOK
CHG
is LOW while 3.0V<V
the
SHDN = High
Vin Fault
HIGH
MP2605 – 28V, 1A LINEAR BATTERY CHARGER WITH TRICKLE CHARGE AND TIMER
CHG
Table 2— CHG Indication for different Charge State
Figure 4—Filtered Charge Status with GPIO Connection
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
pin
Battery Full
IN
<7V, otherwise it is HIGH.
will
HIGH
become
© 2010 MPS. All Rights Reserved.
frequency
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1
6
9
7
BF
) is
high
IN
SD
NTC
SS
Time out Fault
Toggled at the
C HG
C
11
2
TMR
GND
Under full charge conditions, certain systems
may draw a very narrow current pulse that
exceeds the I
may glitch. It is desirable to blank the CHG glitch
so that the system can properly indicate full
charge conditions to the user. A simple solution
is to add a RC filter on the CHG pin to filter out
the possible CHG glitch, as shown in Figure 4.
5
×
10
(
µ
AC OK
−
) F
6
Hz
3
IS ET
TM R
B AT
Temperature Fault
10
8
4
BF
Ambient
threshold. The CHG indicator
HIGH
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In Charging
LOW
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