Electrical characteristics (continued), Electrical characteristics – Rainbow Electronics MAX1874 User Manual
Page 4
MAX1874
Dual-Input, USB/AC Adapter, 1-Cell
Li+ Charger with OVP and Thermal Regulation
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
USB
= V
DC
= V
DCLV
= V
EN
= V
USEL
= 5V, V
BATT
= 4.2V, V
THRM
= V
REF
/ 2, Circuit of Figure 2, T
A
= 0°C to +85°C, unless otherwise
noted. Typical values are at T
A
= +25°C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING
DC Rising to
DCOK Falling
USB = open, DC rising to 5V
20
ms
USB Rising to
UOK Falling
DC = open, USB rising to 5V
20
ms
DC Falling to
DCOK Going
Open-Drain Propagation Delay
USB = open, 1k
Ω pullup
2
µs
USB Falling to
UOK Going
Open-Drain Propagation Delay
DC = open, 10k
Ω pullup
2
µs
DC Rising to PON Rising (90%)
USB = open, DC step to 5V, BATT = 3.6V,
100k
Ω pulldown
20
ms
USB Rising to PON Rising (90%)
DC = open, V
USB
step to 5V, V
BATT
= 3.6V,
100k
Ω pulldown
20
ms
DC Falling to PON Going
Open-Drain Propagation Delay
USB = open, 100k
Ω pulldown
2
µs
USB Falling to PON Going
Open-Drain Propagation Delay
DC = open, 100k
Ω pulldown
2
µs
ELECTRICAL CHARACTERISTICS
(V
USB
= V
DC
= V
DCLV
= V
EN
= V
USEL
= 5V, V
BATT
= 4.2V, V
THRM
= V
REF
/ 2, Circuit of Figure 2, T
A
= -40°C to +85°C, unless otherwise
noted. Typical values are at T
A
= +25°C.) (Note 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT VOLTAGE RANGES AND INPUT CURRENT
Maximum DC Input Voltage with
Overvoltage Protection
Q2 input MOSFET must be in place; charging
occurs only below 6.2V, Figures 3, 4, and 5
18
V
Maximum DC Input Voltage Without
Overvoltage Protection
DC = DCLV, Q2 input MOSFET not on circuit,
Figure 3
6.5
V
Maximum Input Voltage for Charging
6.0
6.5
V
V
EN
= 0V
4
DC Supply Current
V
EN
= 5V
6
mA
DCLV Operating Voltage Range
4.35
6.00
V
DCLV Shutdown Supply Current
V
EN
= 0V
500
µA
USB Input Voltage Range
4.35
6.50
V
V
EN
= 0V
750
µA
V
EN
= 5V, V
DC
= 0V
3
mA
USB Supply Current
V
EN
= 5V, V
DC
= 5V
300
µA
DCI Input Current
100
nA
THRM Input Bias Current
100
nA