MAX8601 Maxim Integrated Products, MAX8601 Datasheet - Page 5

• Manufacturer Part Number: MAX8601
• Description: (MAX8600 / MAX8601) Single-/Dual-Input 1-Cell Li Chargers
• Manufacturer: Maxim Integrated Products

(V
OVP Protection and Programmable Charge Timer
MAX8600
DC
6, 7, 9
10
11
= 5V, R
1
2
3
4
5
8
PIN
SETI
MAX8601
1100
1000
900
800
700
600
500
400
300
200
100
1, 7
= 2kΩ, V
10
11
—
2
3
4
5
8
Single-/Dual-Input 1-Cell Li+ Chargers with
-40
_______________________________________________________________________________________
CHARGE CURRENT vs. AMBIENT
TEMPERATURE (1A CHARGE)
BAT
-15
NAME
GND
CHG
SETI
THM
N.C.
POK
BAT
EN
CT
= 3.6V, MAX8601 evaluation kit with thermal resistance of 50°C/W. T
V
BAT
10
T
= 3.6V
A
(°C)
Battery Connection. The IC delivers charging current and monitors battery voltage using BAT.
Bypass BAT to GND with a 2.2µF or larger ceramic capacitor. Connect both BAT inputs
together externally (MAX8601). BAT is high impedance when the IC is disabled.
DC Charge-Current Programming Input. Connect a resistor from SETI to GND to set the
maximum charging current when using the DC input, the prequal current from either input, and
the CHG turn-off threshold.
Thermistor Input. Connect a 10kΩ NTC thermistor, in close proximity to the battery, from THM
to ground to monitor the battery temperature. Connect THM to GND to disable the thermistor
functionality. The IC suspends charging when R
Ground
Timing Capacitor Input. Connect a capacitor from CT to GND to set the precharge timeout,
top-off time, and fast-charge timeout. Connect CT to GND to disable the timers.
No Connection. Make no external circuit connection.
Active-Low Enable Input. Drive low or connect EN to GND to enable the charger. Drive EN high
to disable the charger.
Power-OK Monitor. POK is an open-drain output that pulls low when a valid charging source is
detected at either DC or USB (MAX8601). POK is high impedance when EN is high.
Charging-Status Output. CHG goes low when the battery is above 3V and being charged with
a current greater than 7.5% of the current programmed with R
when the charger is in prequal, top-off, or disabled.
35
R
V
SETI
BAT
60
= 1.5kΩ
= 4V
Typical Operating Characteristics (continued)
85
FUNCTION
800
700
600
500
400
300
200
100
0
0.010
THM
is outside the hot and cold limits.
FAST-CHARGE TIME vs. C
0.045
A
= +25°C, unless otherwise noted.)
SETI
C
CT
0.080
(µF)
. CHG is high impedance
Pin Description
0.115
CT
0.150
5