MAX17035(2009) 查看數據表（PDF） - Maxim Integrated
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MAX17035 Datasheet PDF : 27 Pages
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High-Frequency,
Low-Cost SMBus Chargers
Pin Description
PIN
NAME
FUNCTION
1
SCL
SMBus Clock Input. Connect to an external pullup resistor according to SMBus specifications.
2
SDA
SMBus Data I/O. Open-drain output. Connect to an external pullup resistor according to SMBus
specifications.
Charger Supply Input. Connect to adapter supply. For minimum input bias current connect to the
3
DCIN
center of the input/soft-start FETs. Bypass with a 1FF ceramic capacitor to PGND placed close to
the pin. Add a 10W resistor to reduce input surge at adapter insertion.
Linear Regulator Output. This is a 30mA reference and also powers the DLO driver, the BST circuit,
4
LDO
and the internal SMBus circuitry. Bypass with a 1FF ceramic capacitor to PGND placed close to the
pin. This output is disabled when the charger is disabled.
5
DLO
Low-Side Power-MOSFET Driver Output. Connect to low-side n-channel MOSFET gate.
Adaptive System Current-Limit Comparator Output. This open-drain output is high impedance when
6
ADAPTLIM the voltage at the IINP pin is lower than the ITHR threshold. For a typical application, use a 10kW
pullup resistor to LDO (pin 4).
7
BST
High-Side Driver Supply. Connect a 0.1FF capacitor from BST to LX.
8
LX
High-Side Driver Source Connection
9
DHI
High-Side Power MOSFET Driver Output. Connect to high-side n-channel MOSFET gate.
AC Detect Output .This open-drain output is high impedance when ACIN is lower than 1.5V. The
10
ACOK
ACOK output remains high when the MAX17035/MAX17435/MAX17535 are powered down. For a
typical application, use a 10kI pullup resistor to LDO (pin 4).
11
CSIN
Output Current-Sense Negative Input. Connect this pin to the negative terminal of the sense resistor.
See the Setting Charge Current section for resistor value and scaling.
Output Current-Sense Positive Input. Connect a current-sense resistor from CSIP to CSIN;
12
CSIP
the voltage across these two pins is interpreted by the MAX17035/MAX17435/MAX17535 as
proportional to the charge current delivered to the battery with approximately 110mV full-scale
voltage. See the Setting Charge Current section for resistor value and scaling.
13
BATT
Battery Voltage Feedback Input. Connect as close as possible to the battery terminal.
Power-Source n-Channel MOSFET Switch Driver Output. When the adapter is not present or an
14
PDSL
overvoltage event detected at the input, the PDSL output is pulled to GND with a 2.5kW (typ)
resistor. Otherwise, it is typically 8V above the adapter voltage when the part is not using the
battery. This is powered by an internal charge pump.
15
CSSN
Input Current-Sense Negative Input. See the description of the CSSP pin for resistor value and
scaling.
Current Sense for Positive Input. Connect a current-sense resistor from CSSP to CSSN. The voltage
across CSSP to CSSN determines the current at which the charger reduces charging current to
keep from drawing more current from the adapter than is allowed. As the system current flowing
in the resistor from CSSN to CSSP increases, the charger reduces charge current to keep the
16
CSSP
system current at the limit value. When the system current reaches approximately 130% of the
max programmed value, the PDSL pin changes state and turns off the input FET to prevent excess
current from the adapter. When the adapter overcurrent condition occurs, give a 16ms blanking
time, and then turn off the adapter switch. The adapter switch is turned on again after 0.6s. Try the
same thing one more time. After the third blanking time (16ms), the adapter MOSFETS are latched
in the off state. To release the adapter switch’s off state, adapter removal and reinsertion is needed.
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