MAX8677CETG+T Maxim Integrated Products, MAX8677CETG+T Datasheet - Page 9

• Manufacturer Part Number: MAX8677CETG+T
• Description: IC USB/AC ADP CHARGER 24-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8677CETG+T

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 4.1 V ~ 6.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

15, 16
17, 18
20, 21
PIN
10
11
12
13
14
19
22
23
24
—
6
7
8
9
NAME
USUS
PEN2
PSET
TSET
GND
CHG
ISET
THM
DOK
UOK
USB
BAT
SYS
FLT
CT
VL
EP
1.5A Dual-Input USB/AC Adapter Charger
USB High/Low Control. PEN2 sets the DC or USB current limit to 100mA (PEN2 low) or 500mA (PEN2 high).
PEN2 controls both DC and USB current limits when PEN1 is low. See Table 2.
DC Input Current-Limit Set. Connect a resistor to ground to program the DC current limit to 3000/R
Logic LDO Output. VL is the output of an LDO that powers the MAX8667C internal circuitry. VL also provides
3.3V at up to 10mA to power external circuitry. Connect a 0.1µF capacitor from VL to GND.
Ground
Charge Timer Program Pin. A capacitor from CT to GND sets the fast-charge (t
fault timers. Connect to GND to disable the timer.
Charge Current Set Input. A resistor (R
The prequal charge current is 10% of the set maximum charge current.
Thermistor Input. Connect a negative temperature coefficient (NTC) thermistor that has good thermal contact
with the battery from THM to GND. Connect a resistor equal to the thermistor +25°C resistance from THM to VL.
Charging is suspended when the thermistor is outside the hot and cold limits. Connect THM to GND to disable
the thermistor temperature sensor.
USB Suspend Input. With PEN1 low, driving USUS high turns off both the USB and DC inputs. With PEN1 high,
driving USUS high turns off only the USB input. See Table 2.
Termination Current Set Pin. Connect to GND, leave open, or connect to VL for a 5%, 10%, or 15% (of I
termination current (I
USB Power Input. USB is capable of delivering up to 0.5A to SYS. The USB current limit is set with PEN2 and
USUS. See Table 2. Both USB pins must be connected together externally.
Battery Connection. Connect to a single-cell Li+ battery. The battery charges from SYS when a valid source is
present at DC or USB. BAT powers SYS when neither DC nor USB power is present, or when the SYS load
exceeds the input current limit. Both BAT pins must be connected together externally.
Charger Status Output. Active-low, open-drain output pulls low when the battery is in fast-charge or prequal.
Otherwise, CHG is high impedance.
System Supply Output. SYS is connected to BAT through an internal 40mΩ system load switch when DC or USB
is invalid, or when the SYS load is greater than the input current limit.
When a valid voltage is present at DC or USB, SYS is limited to 4.35V. When the system load (I
D C or U S B cur r ent l i m i t, S Y S i s r eg ul ated to 68m V b el ow BAT, and b oth the U S B i np ut and the b atter y ser vi ce S Y S .
Bypass SYS to GND with a 10µF X5R or X7R ceramic capacitor. Both SYS pins must be connected together
externally.
DC Power-OK Output. Active-low, open-drain output pulls low when a valid input is detected at DC.
USB Power-OK Output. Active-low, open-drain output pulls low when a valid input is detected at USB.
Fault Output. Active-low, open-drain output pulls low when the battery timer expires before prequal or
fast-charge complete.
Exposed Paddle. Connect the exposed paddle to GND. Connecting the exposed paddle does not remove the
requirement for proper ground connections to the appropriate pins.
_______________________________________________________________________________________
TERM
) threshold.
ISET
and Smart Power Selector
) from ISET to GND programs the maximum charge current up to 1.5A.
FUNCTION
Pin Description (continued)
FSTCHG
) and prequal (t
SYS
) exceeds the
PSET
PREQUAL
.
CHGMAX
)
)
9