MAX1501 Maxim Integrated Products, MAX1501 Datasheet - Page 9

• Manufacturer Part Number: MAX1501
• Description: Highly Integrated Linear Battery Charger with Thermal Regulation for Portable Applications
• Manufacturer: Maxim Integrated Products

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