MAX17043 查看數據表（PDF） - Maxim Integrated
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MAX17043 Datasheet PDF : 14 Pages
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MAX17043/MAX17044
1-Cell/2-Cell Fuel Gauge with
ModelGauge and Low-Battery Alert
MSB—ADDRESS 0Ch
RCOMP RCOMP RCOMP RCOMP RCOMP RCOMP RCOMP RCOMP
27
26
25
24
23
22
21
20
MSB
LSB
LSB—ADDRESS 0Dh
SLEEP X
ALRT
ATHD
24
ATHD
23
ATHD
22
ATHD
21
ATHD
20
MSB
LSB
ATHD UNITS: 1 LSB = 2’S COMPLEMENT 1%
ATHD RANGE: 11111b = 1%
00000b = 32%
Figure 5. CONFIG Register Format
SLEEP (Sleep Bit)
Writing SLEEP to logic 1 forces the ICs into Sleep mode.
Writing SLEEP to logic 0 forces the ICs to exit Sleep
mode. The power-up default value for SLEEP is logic 0.
X (Don’t Care)
This bit reads as either a logic 0 or logic 1. This bit cannot
be written.
ALRT (ALERT Flag)
This bit is set by the IC when the SOC register value
falls below the alert threshold setting and an interrupt is
generated. This bit can only be cleared by software. The
power-up default value for ALRT is logic 0.
Table 3. COMMAND Register Commands
VALUE
0054h
COMMAND
POR
DESCRIPTION
See the Power-On Reset
(POR) section.
ATHD (Alert Threshold)
The alert threshold is a 5-bit value that sets the state of
charge level where an interrupt is generated on the ALRT
pin. The alert threshold has an LSb weight of 1% and can
be programmed from 1% up to 32%. The threshold value
is stored in two’s-complement form (00000 = 32%, 00001
= 31%, 00010 = 30%, 11111 = 1%). The power-up default
value for ATHD is 4% or 1Ch.
COMMAND Register
The COMMAND register allows the host processor to
send special commands to the IC. Valid COMMAND
register write values are listed as follows. All other
COMMAND register values are reserved. Table 3 shows
COMMAND register commands.
Application Examples
The MAX17043/MAX17044 have a variety of configura-
tions, depending on the application. Table 4 shows the
most common system configurations and the proper pin
connections for each.
Table 4. Possible Application Configurations
SYSTEM CONFIGURATION
1S Pack-Side Location
1S Host-Side Location
1S Host-Side Location,
Low Cell Interrupt
1S Host-Side Location,
Hardware Quick-Start
2S Pack-Side Location
2S Host-Side Location
2S Host-Side Location,
Low Cell Interrupt
2S Host-Side Location,
Hardware Quick-Start
IC
MAX17043
MAX17043
MAX17043
MAX17043
MAX17044
MAX17044
MAX17044
MAX17044
VDD
Power directly from battery
Power directly from battery
Power directly from battery
Power directly from battery
Power from +2.5V to +4.5V
LDO in pack
Power from +2.5V to +4.5V
LDO or PMIC
Power from +2.5V to +4.5V
LDO or PMIC
Power from +2.5V to +4.5V
LDO or PMIC
ALRT
Leave unconnected
Leave unconnected
Connect to system
interrupt
Leave unconnected
Leave unconnected
Leave unconnected
Connect to system
interrupt
Leave unconnected
QSTRT
Connect to GND
Connect to GND
Connect to GND
Connect to rising-edge
reset signal
Connect to GND
Connect to GND
Connect to GND
Connect to rising-edge
reset signal
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