Datasheet

DC Input Sources
The MAX8600/MAX8601 operating input voltage range
is 4.15V to 7V. The device survives input voltages up to
16V without damage to the IC. If the input voltage is
greater than 7.5V (typ), the IC stops charging. An
appropriate power supply must provide at least 4.2V
plus the voltage drop across the internal pass transistor
when sourcing the desired maximum charging current.
V
IN(MIN)
> 4.2V + I
CHARGE(MAX)
x R
ON
where R
ON
is the input-to-BAT resistance (typically
0.5Ω). Failure to meet this requirement results in an
incomplete charge or increased charge time.
Stand-Alone Li+ Charger
The MAX8600 provides a complete Li+ charging solu-
tion. Figure 3 shows the MAX8600 as a stand-alone Li+
battery charger. The 2kΩ resistor connected to SETI
sets a charging current of 750mA. The LED indicates
when fast-charge has begun. When fast-charge is com-
plete, the LED turns off.
USB-Powered Li+ Charger (MAX8601)
The universal serial bus (USB) provides a high-speed
serial communication port as well as power for the
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
_______________________________________________________________________________________ 9
BAT
Li+
CT
THM
VBUS
GND
D+
D-
500mA
USB PORT
GND
EN
FLT
V
I/O
USB
DC
USEL
SETI
POK
R5
100kΩ
C2
2.2μF
C1
1μF
C3
0.068μF
R1
2kΩ
R3, R4
100kΩ
R2
10kΩ
CHG
MAX8601
SYSTEM
Figure 4. USB Battery Charger with the MAX8601
BAT
Li+
CT
THM
AC
ADAPTER
GND
EN
FLT
+5V
CHARGE
STATUS
D1
GREEN LED
DC
SETI
POK
C1
1μF
R5
1kΩ
C3
2.2μF
C4
0.068μF
R1
2kΩ
R3, R4
100kΩ
R2
10kΩ
CHG
MAX8600
OFF
ON
Figure 3. Stand-Alone Li+ Battery-Charger with the MAX8600