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| MAX1501 Datasheet, PDF (9/15 Pages) Maxim Integrated Products – Highly Integrated, Linear Battery Charger with Thermal Regulation for Portable Applications | |||
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Highly Integrated, Linear Battery Charger with
Thermal Regulation for Portable Applications
CHGEN = HIGH
MODE = LOW
DISABLE
CHARGER OFF
ACOK = LOW
RLED = OFF
GLED = OFF
ACOK = HIGH
OFF
CHARGER OFF
ACOK = LOW
RLED = OFF
GLED = OFF
ACOK = (4.2V < VIN < 6.25V) AND (VIN - VBATT > 100mV)
ACOK = LOW
CHGEN = LOW
VBATT < 2.8V
CHGEN = LOW
PREQUAL
10% SETI CURRENT
ACOK = LOW
RLED = ON
GLED = OFF
NOBATT
(CURRENT LIMITED AND
CHGEN = LOW THERMALLY PROTECTED)
ACOK = LOW
RLED = OFF
GLED = OFF
SOFT-START
VBATT < 2.8V
CHGEN = HIGH
MODE = HIGH
SOFT-START
TIME > TMAX
FAST CHARGE
(THERMALLY PROTECTED)
100% SETI CURRENT
ACOK = LOW
RLED = ON
GLED = OFF
ICHG < ITOP-OFF
TOP OFF
(VOLTAGE LOOP)
RLED = OFF
GLED = ON
VBATT < 4V (Li+ MODE, SELV = VL, AND NiMH/NiCd MODE)
VBATT < 3.9V (Li+ MODE, SELV = GND)
TIME > TMAX
DONE
CHARGER OFF
RLED = OFF
GLED = ON
Figure 2. Charge State Diagram
Detailed Description
Modes of Operation
CHGEN and MODE together set the operating modes
of the MAX1501. Both inputs possess internal 175kâ¦
pulldown resistors to GND. Table 1 describes the four
operating modes of the MAX1501.
Table 1. Modes of Operation
MODE
Li+ Charge Mode
NiMH/NiCd Charge Mode
Disable Mode
No-Battery Mode
CHGEN
0
0
1
1
MODE
0
1
0
1
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