MAX17050EVKIT# Maxim Integrated, MAX17050EVKIT# Datasheet - Page 30

• Manufacturer Part Number: MAX17050EVKIT#
• Description: Power Management IC Development Tools MAX17050 Eval Kit
• Manufacturer: Maxim Integrated
• Type: Voltage Protectionr
• Series: MAX17047, MAX17050r

Specifications of MAX17050EVKIT#

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX17050
• Input Voltage: 2.5 V to 4.5 V
• Interface Type: I2C
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Part # Aliases: 90-BT07K#D00
• For Use With: MAX17050

The device detects a cell removal if either the ETHRM or
FTHRM bits of the CONFIG register are set to enable the
THRM pin output. Cell removal does not affect IC opera-
tion. The device continues to update fuel-gauge outputs.
The host should monitor the Br and Bst bits of the Status
register to determine if the fuel-gauge outputs are valid.
The device can also be configured to alert the host when
cell removal occurs. When Ber = 1 in the CONFIG regis-
ter, the device generates an interrupt on the ALRT pin at
the start of the first temperature conversion after removal.
This could take up to 1.4s to occur. This feature is useful
if the application uses more than one cell type and the IC
must be reconfigured at each insertion.
The device can be configured to quickly alert the host of
impending power loss on cell removal. This fast response
allows the system to quickly and gracefully hibernate to
prevent power loss during battery swap. When Ber = 1,
FTHRM = 1, and ALRTp = 0 in the CONFIG register, an
interrupt on the ALRT pin is generated within 100Fs after
V
tion is used, it is recommended that all other IC interrupts
are disabled to prevent the host from spending time
determining the cause of the interrupt. Fast detection of
cell removal has no affect on fuel-gauge operation, but
leaving the external resistor-divider active increases cur-
rent consumption of the application. See
Figure 39. Fast Detection of Cell Removal
Maxim Integrated
AIN
becomes greater than V
Fast Detection of Cell Removal
THRM
- V
OUTPUT
DETR
V
ALRT
BATT
AIN
Cell Removal
Figure
. If fast detec-
CELL REMOVAL
39.
(Ber = 1, FTHRM = 1)
CELL REMOVAL
ModelGauge m3 Fuel Gauge
< 100µs
INTERRUPT GENERATED
The device operates in one of two power modes: active
and shutdown. While in active mode, the device oper-
ates as a high-precision battery monitor with tempera-
ture, voltage, auxiliary inputs, current, and accumulated
current measurements acquired continuously, and the
resulting values updated in the measurement registers.
READ and WRITE access is allowed only in active mode.
In shutdown mode, the LDO is disabled and all
activity stops, although volatile RAM contents remain
preserved. All A/D register and fuel-gauge output values
are maintained. There are several options for entering
shutdown:
Entering shutdown:
• SHUTDOWN command—Write the CONFIG register
• Pack removal—Pack removal detection is valid for
• I
• ALRT shutdown—Shutdown occurs when the ALRT
SHDN = 1 through the I
than the SHDNTIMER register value.
longer than the SHDNTIMER register value and the
CONFIG register AINSH = 1.
than the SHDNTIMER register value and the CONFIG
register I2CSH = 1.
line is externally driven low for longer than the
SHDNTIMER register value (ALSH = 1 and ALRTp =
0), or the ALRT line is externally driven high for longer
than the SHDNTIMER register value (ALSH = 1 and
ALRTp = 1). See the
2
C shutdown—I
MAX17047/MAX17050
2
C lines both persist low for longer
CONFIG Register (1Dh)
Modes of Operation
2
C interface; wait for longer
section.
30