CS213 datasheet(7/13 Pages) NEOTEC

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CS213

Neotec Semiconductor Ltd.

7/13

CS213DS V1.5 2014/07/18

www.neotec.com.tw

The above information is the exclusive intellectual property of Neotec Semiconductor Ltd. and shall not be disclosed, distributed without permission from Neotec.

Operation

The CS213 provides over-charge, over-discharge, discharge over-current and load short-circuiting protections

for the 1-cell battery pack. CS213 continuously monitors the voltage of battery between VDD pin and VSS pin to

control over-charge and over-discharge protections. When the battery pack is in discharging stage, the current

flows from battery to the load through EB+ and EB-; the voltage between V- pin and VSS pin is positive. The

CS213 also monitors the voltage which is determined by the current of discharge and the series Rds(on) of

MOSFETs between V- pin and VSS pin to detect discharge over-current current conditions.

(1) Normal Condition (Operation mode)

The CS213 turns both the charging and discharging control MOSFETs on when the voltage of battery is in

the range from over-charge detection voltage (VDET1) to over-discharge detection voltage (VDET2), and the VM

pin voltage is discharge over-current detection voltage (VDET3). This is called the normal condition that

charging and discharging can be carried out freely.

Caution: The CS213 may be needed connecting a charger to return to normal condition, when the battery is

connected for the first time.

(2) Over-charge Condition

1) Over-charge Protection

When the VDD voltage is higher than the over-charge detection voltage (VDET1) and lasts for longer than

the over-charge detection delay time (tVDET1), CS213 turns off the external charging MOSFET to protect

the pack from being over-charged, which CO pin turns to “L” from “H” level.

2) Over-charge Protection Release

When the battery voltage is lower than VREL1 and and charger is connected, CS213 would release this

condition.

When the battery voltage is lower than VDET1 and charger is removed, CS213 can be released from this

condition.

(3) Over-discharge Condition

1) Over-discharge Protection:

When the VDD voltage is lower than the over-discharge detection voltage (VDET2) and lasts longer than

over-discharge detection delay time (tVDET2), CS213 turns off the external discharge MOSFET to protect

the pack from being over-discharged, which DO pin turns to “L” from “H” level.

2) Over-discharge Protection Release:

The over-discharge protection is released when the battery voltage is higher than the over-discharge

release voltage (VREL2).

(4) Discharge Over-current Condition

1) Discharge Over-current Protection:

The CS213 provides discharge over-current protection and load short-circuiting protection:

(a) Discharge over-current protection occurs when V- pin voltage between VDET3 and VSHORT and lasts

for a certain delay time (tVDET3) or longer.

(b) Load short-circuiting protection occurs when V- pin voltage is higher than VSHORT and lasts for a

certain delay time (tSHORT) or longer.

When above conditions happen, the DO pin goes “L” from ”H” to turn off the discharging MOSFET.

2) Discharge Over-current and Load Short-Circuiting Protection Release:

When the V- pin voltage equals to VSHORT or lower, discharge over-current status returns to normal mode

by remove external load.

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