Datasheet > SS4036G

SS4036G

更新时间： 2024-11-20 06:13:55

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描述
Two-Cell Li-Ion and Li-Polymer Charge Management IC

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SS4036G 数据手册

SS4036G

Two-Cell Li-Ion and Li-Polymer Charge Management IC

PRODUCT SUMMARY

Charge management for two-cell Li-Ion or Li-Polymer battery packs

Individual cell monitoring - avoids over-charging

TSSOP-8 small industry-standard package

FEATURES

Optional external thermistor monitors the pack temperature

Conditioning charge for reviving deeply discharged cells

Timer function available to limit the charging time

Pb-free, RoHS compliant.

DESCRIPTION

The SS4036G is a charging control IC designed

for battery packs with two cells in series. When

multiple cells in a battery pack are connected in

series, the weakest cell determines the overall

pack capacity. The SS4036G monitors the voltage

of each cell toensure that no cell is overcharged.

The pulse width modulation (PWM) output can be

used as either a linear or switching charge-control

circuit.

To be safe, charging is suspended if the voltage

of the temperature sense input pin is higher than

Min Temp Threshold (VTmin) or lower than

Max Temp Threshold (VTmax). When the battery

temperature is within the safe zone, the

SS4036G charges the battery in three phases:

pre-charging, constant-current, or constant-

voltage. If the battery voltage is less than 3.1V,

the SS4036G pre-charges the battery with a low

current. After the pre-charging, the SS4036G

The small 8-pin TSSOP package is ideal for compact

battery packs used for portable applications.

The SS4036G continuously monitors each cell

voltage, cell current and the battery temperature.

Any unspecified condition will stop the charging to

to protect the battery cells. An external negative-

temperature-coefficient thermistor is used as a

sensor to monitor the battery pack temperature.

applies a constant current to the battery. The

value of this constant current is determined by

the value of the current sense resistor. When

the battery voltage is above the threshold, the

SS4036G begins constant-voltage charging until

the battery is fully charged. The battery is fully

charged when the current drops down to the

termination threshold.

1/09/2006 Rev.3.01

www.SiliconStandard.com

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