Datasheet > EC9522T

EC9522T

更新时间： 2024-11-09 06:55:35

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描述
LI-ION PROTECTION IC

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数据手册

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EC9522T 数据手册

LI-ION PROTECTION IC

EC9522T

Ver2.4 2004 / 05

Features

TYP. 3.5uA

TYP. 0.25uA

+/- 50mV

Low supply current

Supply current

Standby current (after detecting over-discharge)

Over-charge detector(Topt=25ºC)

Over-charge detector (Topt=0 to 50ºC)

Over-discharge detector

High accuracy detector

Threshold

+/- 60mV

+/- 3.0%

Variety of detector threshold

Built in protection circuit

Over-charge detector threshold

Over-discharge detector threshold

Excess current protection

Accuracy

4.0V to 4.4V step of 0.005V

2.0V to 3.0V step of 0.005V

0.04V to 0.32V step of 0.04V

±20%

Output delay of over charge

Output delay of over-discharg

Small package

Time delay at VDD=4.3V

VDD=2.4V with built-in capacitor

1.2S ^note1

10mS

SOT23-6/6-pin

Note1: The result was measured from EC9522T0001

Part Number Examples

Over charge detection

Over charge release

Part No.

marking

Pack type

voltage

4.30V

….

voltage

4.10V

….

EC9522T003

E21-ꢀ

SOT-23-6

….

*note2

…

Note2: New model version and specific

characteristics may be order by customer.

General Description

The EC9522T is protection IC for over-charge/discharge of rechargeable one-cell

Lithium-ion(Li+) excess load current, further include a short circuit protector for preventing large

external short circuit current.

Each of these IC is composed of three voltage detectors, a reference unit, a delay circuit, a

short circuit protector, and a logic circuit. When charging voltage crosses the detector threshold

from a low value to value higher than VDET1, the output of Cout pin, the output of over-charge

detector/VD1, switches to low level, charger’s negative pin level. After detecting over-charge the

VD1 can be reset and the output of Cout becomes high when the VDD voltage is coming down to a

level lower than “VREL1”, or when a kind of loading is connected to VDD after a charger is

disconnected from the battery pack while the VDD level is in between “VDET1” and “VREL1” in

the EC9522T.

The output of Dout pin, the output of over-discharge detector/VD2, switches to low level after

internally fixed delay time passed, when discharging voltage crosses the detector threshold from a

high value lower than VDET2. After EC9522T detect the over-discharge voltage, connect a charger

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