MAX8677A
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DC
= 5V, THM = CEN = USUS = GND, V
BAT
= 4V, V
PEN1
= V
PEN2
= 5V, USB, TSET, DONE, CHG, DOK, UOK, FLT are unconnected,
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
ISET Voltage
R
ISET
= 4kΩ, I
BAT
= 500mA
(V
ISET
= 1.5V at full charge current)
0.9 1.0 1.1 V
Charger Soft-Start Time Charge-current ramp time 1.5 ms
BAT Prequal Threshold V
BAT
rising, 180mV hysteresis 2.9 3 3.1 V
No DC or USB power connected 3 6 µA
BAT Leakage Current V
BAT
= 4.2V
DC or USB connected, V
CEN
= 5V 3 6 µA
V
TSET
= 0 5
V
TSET
= open 10
DONE Threshold as a
Percentage of Fast-Charge
I
BAT
decreasing
V
TSET
= V
L
15
%
Maximum Prequal Time
From V
CEN
falling to end of prequal charge,
V
BAT
= 2.5V, C
T
= 0.068µF
30 Min
Maximum Fast-Charge Time From V
CEN
falling to V
FLT
falling, C
T
= 0.068µF 300 Min
Timer Accuracy C
T
= 0.068µF -20 +20 %
Timer Extend Threshold
Percentage of fast-charge current below which timer
clock operates at half speed
50 %
Timer Suspend Threshold
Percentage of fast-charge current below which timer
clock pauses
20 %
THM
THM Threshold, Cold When charging is suspended, 2% hysteresis 72 74 76 % of V
L
THM Threshold, Hot When charging is suspended, 2% hysteresis 26 28 30 % of V
L
THM Threshold, Disabled When THM function is disabled 3 % of V
L
THM = GND or V
L
; T
A
= +25°C -0.1 0.001 +0.2
THM Input Leakage
THM = GND or V
L
; T
A
= +85°C 0.01
µA
LOGIC I/O: CHG, FLT, DONE, DOK, UOK, PEN1, PEN2, CEN, TSET, USUS
High level 1.3
Low level 0.4
V
Logic Input Thresholds
Hysteresis 50 mV
High level V
L
- 0.3
Midlevel 1.2 V
L
- 1.2
TSET Input Threshold
Low level 0.3
V
TSET = GND
-20 -6
TSET Input-Bias Current
TSET = V
L
620
µA
T
A
= +25°C 0.001 1
Logic Input-Leakage Current V
INPUT
= 0V to 5.5V
T
A
= +85°C 0.01
µA
Logic Output Voltage, Low Sinking 1mA 25 100 mV
T
A
= +25°C 0.001 1
Logic Output-Leakage Current,
High
V
OUT
= 5.5V
T
A
= +85°C 0.01
µA
Note 1: Limits are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design.
Note 2: Guaranteed by design.
