MAX17035(2009) 查看數據表（PDF） - Maxim Integrated

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MAX17035
(Rev.:2009)

High-Frequency, Low-Cost SMBus Chargers

Maxim Integrated 

High-Frequency,

Low-Cost SMBus Chargers

Pin Description (continued)

PIN

NAME

FUNCTION

17

CC

Voltage Regulation Loop-Compensation Point. Connect a 10nF capacitor from CC to GND.

Input Current-Monitor Output. The voltage at the IINP pin is 20 times the voltage from CSSP to

18

IINP

CSSN. This voltage is present when charging is enabled to monitor the system current, and when

the battery is discharging to monitor the battery discharge current.

AC Adapter-Detect Input. ACIN is the input to a comparator with a comparison voltage of about

1.5V. The output of the comparator is ACOK. ACOK goes low when the threshold voltage is

exceeded to indicate that the AC adapter is present, and it enables the charger. When the ACIN

19

ACIN

input is above 2.1V, the MAX17035/MAX17435/MAX17535 interpret that as an adapter overvoltage

event. The charger is then disabled and the adapter MOSFETs are turned off. If the part is charging

and the ACIN voltage drops below the programmed threshold, the charger is disabled and a

ChargeCurrent() and ChargeVoltage() command have to be written over the SMBus to reenable the

charger.

Adaptive System Current-Limit Comparator Threshold. This pin connects to the inverting input of a

20

ITHR

comparator. The noninverting input of the comparator is the IINP input, while the output is driving

the ADAPTLIM open drain. When the input to ITHR is greater than IINP, the ADAPTLIM output is

high.

21

VAA

4.096V Internal Reference Voltage; No External Load Allowed. Bypass to analog ground using a 1FF

or greater ceramic capacitor.

22

VCC

Circuitry Supply-Voltage Input. Connect to LDO through 10I and bypass with a 0.1FF capacitor to

GND as close as possible to the package pin.

23

GND

Analog Ground

Enable/Disable Charger Operation. This disables the charger and associated circuitry when EN

24

EN

goes low and is in addition to the ACOK charger enable. If the adapter is absent and EN is pulled

up to a voltage higher than 2.4V, the battery-discharge current monitor on IINP is enabled.

—

EP

Exposed Pad. Connect backside exposed pad to power ground.

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