PS200 Просмотр технического описания (PDF) - Microchip Technology
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PS200 Datasheet PDF : 36 Pages
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PS200
FIGURE 2-1:
PS200 STATE DIAGRAM LI CHARGER
(A) Charge Pending
(1) VCC Reset or
BATPRES = 0
(2) Vcc Reset or
BATPRES = 0
(4) BATPRES = 1
(3) VCC Reset or
BATPRES = 0
(5) V> VRCHG
(B) Charge
Qualification
(6) V > VMIN and
TMAX > T > TMIN
(7) TMAX < T OR T < TMIN
(8) V < VMIN and
TMAX > T > TMIN
(9) TMAX > T > TMIN and V < VRCHG
(C) Charge Suspend
(10) t > tp and V < VMIN or
T > TMAX or T < TMIN
(D) Precharge
(12) V > VMAX or
T > TMAX or
t > ti or
T < TMIN
(E) Current Regulation
(14) V > VREG,
T < TMAXCHG
(11) V > VMIN and
TMAX > T > TMIN
(13) VCC Reset or BATPRES = 0
(15) V > VMAX or
T > TMAXCHG or
t > tv
(F) Voltage Regulation
(16) VCC Reset
BATPRES = 0
(17) I < IMIN and V ≥ VREG
(18) BATPRES = 0 or
V < VRCHG or VCC Reset
(G) Charge Complete
Legend:
T
= battery temperature
TMIN = minimum temperature allowed during charging
TMAX = maximum temperature allowed during charging
TMAXCHG = maximum temperature allowed during voltage regulation
V
= battery voltage
VMIN = minimum voltage for entering current regulation
VMAX = maximum voltage for charge initiation
VREG = target voltage during charge regulation
VRCHG = voltage threshold at which charging will restart
I
= charge current
IMIN = taper current threshold for
End-Of-Charge during voltage regulation
t
= time
tp
= precharge time limit
ti
= current regulation time limit
tv
= voltage current time limit
BATPRES= battery present variable; if ‘1’, then battery
is present; if ‘0’, then battery is not present
Note: When the PS200 resets, it enters the Charge Pending state.
DS21891B-page 6
© 2005 Microchip Technology Inc.
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