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MAX8903NETI+T 数据表(PDF) 20 Page - Maxim Integrated Products

部件名 MAX8903NETI+T
功能描述  2A 1-Cell Li DC-DC Chargers for USB and Adapter Power
PDF  30 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  MAXIM [Maxim Integrated Products]
网页  https://www.maximintegrated.com/en.html
标志 MAXIM - Maxim Integrated Products

MAX8903NETI+T 数据表(HTML) 20 Page - Maxim Integrated Products

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MAX8903A–E/G/H/J/N/Y
2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
20
Maxim Integrated
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 VBATREG (i.e., the charger is in voltage mode).
t
C
F
t
C
PREQUAL
CT
FST CHG
CT
=×
µ
=×
33
015
660
min
.
min
-
0
015
15
8903
.
(
/ // // )
µF
ts MAX
A D H J N Y
t
TOP OFF
TO
-
=
P
POFF
CT
C
F
MAX
B E G
-
=×
132
015
8903
min
.
(/ / )
µ
FAULT
UOK AND/OR DOK = LOW
CHG = HIGH IMPEDANCE
FLT = LOW
ICHG = 0mA
PREQUALIFICATION
UOK AND/OR DOK = LOW
CHG = LOW
FLT = HIGH IMPEDANCE
0 < VBAT < VBATPQ
ICHG
≤ ICHGMAX/10
DONE
UOK AND/OR DOK = 0
CHG = HIGH IMPEDANCE
FLT = HIGH IMPEDANCE
VBATREG + VRSTRT < VBAT < VBATREG
ICHG = 0mA
FAST-CHARGE
UOK AND/OR DOK = LOW
CHG = LOW
FLT = HIGH IMPEDANCE
VBATPQ < VBAT < VBATREG
ICHG
≤ ICHGMAX
NOT READY
UOK AND DOK = HIGH IMPEDANCE
CHG = HIGH IMPEDANCE
FLT = HIGH IMPEDANCE
ICHG = 0mA
TIMER > tPREQUAL
VBAT > VBATPQ
RESET TIMER
VBAT < VBATPQ - 180mV
RESET TIMER = 0
ICHG < ITERM
AND VBAT = VBATREG
AND THERMAL
OR INPUT LIMIT
NOT EXCEEDED;
RESET TIMER
ICHG > ITERM
RESET TIMER
VBAT < VBATREG + VRSTRT
RESET TIMER
TIMER > tTOP-OFF
UOK AND/OR DOK = LOW
CEN = 0
RESET TIMER
CEN = HI OR
REMOVE AND RECONNECT
THE INPUT SOURCE(S)
ANY STATE
TOGGLE CEN OR
REMOVE AND RECONNECT
THE INPUT SOURCE(S)
TIMER > tFSTCHG
(TIMER SLOWED BY 2x IF
ICHG < ICHGMAX/2, AND
PAUSED IF ICHG < ICHGMAX/5 WHILE VBAT < VBATREG)
TOP-OFF
UOK AND/OR DOK = LOW
CHG = HIGH IMPEDANCE
FLT = HIGH IMPEDANCE
VBAT = VBATREG
ICHG = ITERM
TEMPERATURE SUSPEND
ICHG = 0mA
UOK OR DOK PREVIOUS STATE
CHG = HIGH IMPEDANCE
FLT = HIGH IMPEDANCE
ANY CHARGING
STATE
THM NOT OK
TIMER SUSPEND
THM OK
TIMER RESUME
VBAT < VBATPQ - 180mV
RESET TIMER
Figure 6. MAX8903A Charger State Flow Chart



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