MAX8662ETM+ Maxim Integrated Products, MAX8662ETM+ Datasheet - Page 24

• Manufacturer Part Number: MAX8662ETM+
• Description: IC POWER MANAGE 48-TQFN-EP
• Manufacturer: Maxim Integrated Products

Specifications of MAX8662ETM+

• Applications: Handheld/Mobile Devices
• Current - Supply: 900µA
• Voltage - Supply: 4.1 V ~ 8 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The input current limit can be set to a variety of values
as shown in Table 1. When the PEN1 input is low, a
USB source is expected at DC and the current limit is
set to either 95mA or 475mA by PEN2.
When PEN1 is high, an AC adapter is expected at DC
and the current limit is set based on a programming resis-
tor at PSET. The DC input current limit is calculated from:
An exception is when the battery charger is disabled
(CEN high) with PEN2 low, where the MAX8662/
MAX8663 enter USB suspend mode.
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
Table 1. DC Input Current and Charger Current-Limit Select
* X = Don’t care.
Figure 4. Charger State Diagram
24
CEN
0
0
0
1
1
1
______________________________________________________________________________________
TOO HOT OR TOO COLD
TIMER = SUSPENDED
PEN1
I
X*
DC_LIM
DC Input Current-Limit Selection
0
0
1
0
1
THERMISTOR
CHG = PREVIOUS STATE
ANY CHARGING STATE
PEN2
= 2000 x (1.5 / R
TEMPERATURE
X*
I
SUSPEND
BAT
0
1
0
1
1
= 0mA
THERMISTOR
TEMPERATURE OK
TIMER = RESUMED
95mA
475mA
2000(1.5V / R
Off
475mA
2000(1.5V / R
DC INPUT CURRENT LIMIT
I
BAT
PSET
< I
(PEN1/PEN2)
AND V
PSET
PSET
CHG-MAX
SET TIMER = 0
SET TIMER = 0
)
BAT
)
)
V
BAT
x 7.5%
= 4.2V
I
PREQUALIFICATION
BAT
> 3V
I
CHG = HIGH - Z
CHARGER OFF
CHG = HIGH-Z
FAST CHARGE
CHG = HIGH-Z
BAT
= I
I
TOP - OFF
I
BAT
CHG = 0V
CHG = 0V
BAT
= I
CHG-MAX
DONE
** The maximum charge will not exceed the DC Input current.
= 0mA
CHG-MAX
= 0mA
CEN = 0
SET TIMER = 0
TIMER > t
V
SET TIMER = 0
I
SET TIMER = 0
BAT
BAT
/ 10
> I
< 2.82V
CHG-MAX
100mA USB
500mA USB
AC adapter
USB suspend
500mA USB
AC adapter
TOP-OFF
EXPECTED INPUT TYPE
CEN = 1 OR REMOVE AND
POK is an active-low open-drain output indicating DC
status. When the voltage at DC is between the under-
voltage and the overvoltage thresholds, and is greater
than the BAT voltage, POK pulls low to indicate that
input power is OK. Otherwise, POK is high impedance.
POK is not affected by the states of PEN1, PEN2, or
CEN. POK remains active in thermal overload.
The battery charger state diagram is illustrated in
Figure 4.
With a valid AC adapter/USB voltage present, the bat-
tery charger initiates a charge cycle when the charger
(TIMER SUSPENDED IF I
x 12%
RECONNECT AC
ADAPTER/USB
20% WHILE V
V
SET TIMER = 0
TIMER > t
BAT
= < 4.1V
TIMER > t
FST-CHG
BAT
BAT
< 4.2V)
< I
PREQUAL
CHG-MAX
x
ANY STATE
Power-OK Output ( POK )
1556(1.5V / R
1556(1.5V / R
1556(1.5V / R
Off
Off
Off
CHARGER CURRENT LIMIT**
CHG = BLINK AT 1Hz
I
POK = 0V
BAT
TOGGLE CEN OR
RECONNECT AC
FAULT
ADAPTER/USB
REMOVE AND
= 0mA
Battery Charger
ISET
ISET
ISET
)
)
)