MAX8903JETI+ Maxim Integrated, MAX8903JETI+ Datasheet - Page 20

• Manufacturer Part Number: MAX8903JETI+
• Description: Battery Management 2A 1-Cell Li+ DC-DC USB/Adapter Charger
• Manufacturer: Maxim Integrated
• Series: MAX8903A, MAX8903B, MAX8903C, MAX8903D, MAX8903E, MAX8903G, MAX8903H, MAX8903J, MAX8903Yr

Specifications of MAX8903JETI+

• Rohs: yes
• Battery Type: Li-Ion
• Output Voltage: 5 V
• Output Current: 1 mA
• Operating Supply Voltage: 4.1 V to 16 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Charge Safety Timers: Yes
• Maximum Power Dissipation: 1666.7 mW
• Operating Supply Current: 2.3 mA
• Product Type: Charge Management
• Temperature Monitoring: Yes
• Uvlo Start Threshold: 3.2 V

2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
MAX8903A–E/G/H/J/N/Y
Figure 6. MAX8903A Charger State Flow Chart
20
t
t
t
t
PREQUAL
FST CHG
TIMER RESUME
TOP OFF
TO
P P OFF
-
-
-
V
THM OK
BAT
UOK OR DOK PREVIOUS STATE
TEMPERATURE SUSPEND
< V
CHG = HIGH IMPEDANCE
FLT = HIGH IMPEDANCE
=
=
=
BATPQ
=
RESET TIMER
ANY CHARGING
660
132
15
33
I
CHG
- 180mV
STATE
s MAX
min
min
min
= 0mA
(
×
×
×
0 15
0 15
0 0 15
THM NOT OK
TIMER SUSPEND
C
.
.
.
8903
C
C
CT
CT
CT
µ
µ
µF
F
F
A D H J N Y
(
/ / / / / )
MAX
8903
V
B E G
BAT
/ / )
< V
RESET TIMER = 0
BATPQ
RESET TIMER
I
CHG
UOK AND DOK = HIGH IMPEDANCE
V
BATREG
- 180mV
> I
CHG = HIGH IMPEDANCE
UOK AND/OR DOK = LOW
UOK AND/OR DOK = LOW
CHG = HIGH IMPEDANCE
FLT = HIGH IMPEDANCE
V
TERM
FLT = HIGH IMPEDANCE
FLT = HIGH IMPEDANCE
FLT = HIGH IMPEDANCE
UOK AND/OR DOK = LOW
CHG = HIGH IMPEDANCE
FLT = HIGH IMPEDANCE
PREQUALIFICATION
BATPQ
UOK AND/OR DOK = 0
I
0 < V
CHG
+ V
FAST-CHARGE
I
CHG
V
NOT READY
CHG = LOW
CHG = LOW
I
BAT
RSTRT
I
I
CHG
CHG
< V
CHG
≤ I
TOP-OFF
BAT
DONE
≤ I
= V
CHGMAX
BAT
= 0mA
= 0mA
= I
< V
CHGMAX
< V
TIMER > t
BATREG
TERM
< V
BATPQ
BAT
BATREG
/10
UOK AND/OR DOK = LOW
CEN = 0
RESET TIMER
< V
V
RESET TIMER
BAT
TOP-OFF
While in fast-charge mode, a large system load or device
self-heating may cause the MAX8903_ to reduce charge
current. Under these circumstances, the fast-charge
timer is slowed by 2x if the charge current drops below
50% of the programmed fast-charge level, and suspend-
ed if the charge current drops below 20% of the pro-
grammed level. The fast-charge timer is not affected at
any current if the charger is regulating the BAT voltage
at V
BATREG
> V
I
AND V
AND THERMAL
OR INPUT LIMIT
NOT EXCEEDED;
RESET TIMER
CHG
BATPQ
BATREG
< I
BAT
TERM
= V
CEN = HI OR
REMOVE AND RECONNECT
THE INPUT SOURCE(S)
BATREG
TIMER > t
V
(i.e., the charger is in voltage mode).
BAT
< V
RESET TIMER
BATREG
PREQUAL
+ V
RSTRT
TIMER > t
(TIMER SLOWED BY 2x IF
I
PAUSED IF I
CHG
REMOVE AND RECONNECT
THE INPUT SOURCE(S)
< I
UOK AND/OR DOK = LOW
CHG = HIGH IMPEDANCE
TOGGLE CEN OR
CHGMAX
ANY STATE
FSTCHG
CHG
FLT = LOW
I
CHG
FAULT
/2, AND
< I
= 0mA
CHGMAX
/5 WHILE V
Maxim Integrated
BAT
< V
BATREG
)