MAX8671XETL+ Maxim Integrated Products, MAX8671XETL+ Datasheet - Page 27

no-image

MAX8671XETL+

Manufacturer Part Number
MAX8671XETL+
Description
IC PMIC W/CHARGER 40-TQFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX8671XETL+

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
Voltage - Supply
4.1 V ~ 6.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
40-WFQFN Exposed Pad
Mounting Style
SMD/SMT
Input Voltage
2.6 V to 6.6 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Output Current
0.5 A
Output Voltage
0.6 V to 5 V
Supply Current
0.285 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
To support common 500mA to 1000mA wall adapters
at the DC input, pull PEN1 high. With PEN1 pulled high,
the DC current limit is set by an external resistor from
DISET to AGND (R
current capability of the AC-to-DC adapter (I
follows:
For the selected value of R
rent limit (I
To support USB power sources at the DC input, pull
PEN1 low. With PEN1 low, drive PEN2 and USUS to
select between three internally set USB-related current
limits as shown in Table 1. Choose 100mA for low-
power USB mode. Choose 500mA for high-power USB
mode. Choose suspend to reduce the DC current to
0.11mA (typ) for both USB suspend mode and uncon-
figured OTG mode. To comply with the USB 2.0 specifi-
cation, each device must be initially configured for low
power. After USB enumeration, the device can switch
from low power to high power if given permission from
the USB host. When the load exceeds the current limit,
SYS drops below BAT by V
plies supplemental load current.
If the DC power input is not required, connect DC to
ground or leave it unconnected.
The MAX8671X reduces the USB and DC current limits
by 5%/°C when the die temperature exceeds +100°C.
The system load (I
rent, so input current is first reduced by lowering charge
current. If the junction temperature still reaches +120°C
in spite of charge-current reduction, no input current is
drawn from USB and DC; the battery supplies the entire
load and SYS is regulated below BAT by V
that this on-chip thermal-limiting circuit is not related to
and operates independently from the thermistor input.
As shown in Figure 5, the DC power-OK output (DOK)
is an open-drain, active-low output. The DOK output
pulls low when the voltage from DC to AGND (V
between V
4.0V).
Smart Power Selector for Handheld Devices
DCLIM
DCH
R
I
DCLIM
) as follows (Table 2, Figure 4):
DISET
(typically 6.9V) and V
SYS
______________________________________________________________________________________
DISET
) has priority over the charger cur-
=
2000
). Choose R
2000
DC Power-OK Output (DOK)
DISET
BSREG
×
×
R
I
ADPTR
1 5 .
DISET
1 5 .
, calculate the DC cur-
PMIC with Integrated Charger and
and the battery sup-
V
V
DISET
DCL
based on the
BSREG
ADPTR
(typically
. Note
DC
) as
) is
The DC power-OK circuitry remains active in thermal
overload and DC suspend. If the DC power-OK output
feature is not required, connect DOK to ground or leave
disconnected.
Table 2. DC Current Limit for Standard
Values of R
Figure 4. Programming DC Current Limit
R
DISET
3.01
3.09
3.16
3.24
3.32
3.40
3.48
3.57
3.65
3.74
3.83
3.92
4.02
4.12
4.22
(kΩ)
1000
900
800
700
600
500
3.0
DC INPUT CURRENT-LIMIT RESISTOR
DISET
I
DCLIM
DC INPUT CURRENT LIMIT vs.
3.5
997
971
949
926
904
882
862
840
822
802
783
765
746
728
711
(mA)
4.0
R
DISET
4.5
(kΩ)
R
DISET
5.0
4.32
4.42
4.53
4.64
4.75
4.87
4.99
5.11
5.23
5.36
5.49
5.62
5.76
5.90
6.04
PEN1 = HIGH
(kΩ)
5.5
6.0
I
DCLIM
694
679
662
647
632
616
601
587
574
560
546
534
521
508
497
(mA)
27

Related parts for MAX8671XETL+