MAX8601 Maxim Integrated Products, MAX8601 Datasheet - Page 6

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

Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
Figure 1. Charger State Diagram
6
MAX8600
12, 13
_______________________________________________________________________________________
14
—
—
—
PIN
MAX8601
12, 13
14
—
9
6
FAST-CHARGE TIMER HELD
CHG = PREVIOUS STATE
CHG = PREVIOUS STATE
POK = PREVIOUS STATE
POK = PREVIOUS STATE
THM OUT OF RANGE
PREQUAL TIMER HELD
THM OUT OF RANGE
I
I
NAME
BAT
BAT
USEL
USB
FLT
DC
EP
= 0A
= 0A
DC Input Supply. Connect DC to a 4.5V to 7V charging source. Bypass DC to GND with a 1µF
or larger capacitor. DC takes priority over USB when both are present (MAX8601). Both DC
inputs should be connected together externally.
Fault Status Output. FLT goes low when either the prequal timer or the fast-charge timers
expire and the battery voltage is not above the required threshold. Clear the fault by raising EN
or removing input power.
USB Input Source. Connect to a USB port. Bypass USB to GND with a 1µF or larger capacitor.
USB Charge-Select Input. Logic input that determines the maximum charge current drawn
from the USB input. I
Exposed Paddle. Connect to the GND plane for optimum thermal dissipation.
R
R
R
R
THM
THM
THM
THM
R
R
R
R
THM
THM
THM
THM
> 3.97kΩ AND
> 3.97kΩ AND
< 3.97kΩ OR
< 3.97kΩ OR
< 28.7kΩ
> 28.7kΩ
< 28.7kΩ
> 28.7kΩ
BAT
= 95mA when USEL = low, and I
POK = HIGH, CHG = HIGH, FLT = HIGH
I
BAT(USB)
POK = LOW, CHG = HIGH
POK = LOW, CHG = HIGH
POK = LOW, CHG = HIGH
POK = LOW, CHG = LOW
I
BAT(DC)
I
FAST-CHARGE
BAT
PREQUAL
TOP-OFF
I
I
= 150 / R
= 100mA / 500mA
BAT
BAT
DONE
= 1500 / R
OFF
= 0A
= 0A
EN LOW AND
POWER-GOOD
V
I
AND VOLTAGE MODE
TOP-OFF
TIMEOUT
BAT
BAT
SETI
FUNCTION
ISET
< 112.5 / R
> 3V
Pin Description (continued)
SETI
V
BAT
PREQUAL
TIMEOUT
V
V
V
EN HIGH
< 3V AND
IN
IN
IN
< 4.1V OR
< 7.5V OR
< V
BAT
AND FAST-CHARGE
I
BAT
BAT
> 112.5 / R
OR
TIMEOUT
= 475mA when USEL = high.
SETI
ANY STATE
CHG = HIGH
FLT = LOW
FAULT