MAX1679 データシートの表示（PDF） - Maxim Integrated
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MAX1679 Datasheet PDF : 12 Pages
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Single-Cell Li+ Battery Charger
for Current-Limited Supply
CELL NOT INSTALLED
(FROM ANY STATE)
SHUTDOWN
LED: OFF
PMOS FET: OFF
CHARGING POWER REMOVED
(FROM ANY STATE)
CHARGAEPRPLPIOEDWER
CELL REMOVAL OR
PREQUALIFICATION
PULL THERM HIGH
LED: 50% DUTY CYCLE, 2Hz
PMOS FET: OFF
5mA PRECHARGE: ON
AND
VTBEAMTTP>ER2A.5TVURE
PUVLBLATTTH<ER3.M89HVIGOHR
OK
FASTT-ICMHEAORUGTE
FAULT
LED: 50% DUTY CYCLE, 2Hz
PMOS FET: OFF
TEMPERATURE NOT OK
OR VBATT < 2.5V
EVERY 7sec
FAST-CHARGE QUALIFICATION
FAST-CHARGE
LED: ON
PMOS FET: ON
TEMPERATURE OK
LED: ON
PMOS FET: OFF
CELL VOLTAGE REACHES
BATT REGULATION VALUE (e.g., 4.2V)
TOP OFF
LED: ON
TEMPERATURE NOT OK
TOP-OFF QUALIFICATION
EVERY
7sec
PMOS
TEMPERATURE OK
FET:
PULSED
TOP-OFF
LED: ON
PMOS FET: OFF
FEFTEOTFOFNTITMIMEE ≤ 1%
DONE
LED: 12% DUTY CYCLE, 0.25Hz
PMOS FET: OFF
5mA CANCELLATION CURRENT ENABLED
TEMPERATURE NOT OK
Figure 2. State Machine Diagram
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