T63H0002A datasheet(6/8 Pages) TMT

Part #	T63H0002A

Description	T63H0002A

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Manufacturer	TMT [Taiwan Memory Technology]

Direct Link	http://www.tmtech.com.tw

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TE

CH

tm

T63H0002A

TM Technology Inc. reserves the right

P. 6

Publication Date: JUL. 2002

to change products or specifications without notice.

Revision:A

or VDET2, over-discharge condition can be also

released.

An output delay time for the over-discharge

detection is fixed internally, tVDET2 =10ms typ. At

VDD=2.4V. When the VDD level is going down to a

lower level than VDET2 if the VDD voltage would

be back to a level higher than the VDET2 within a

time period of the output delay time, VD2 would not

output a signal for turning off the discharge control

FET.

After detection of an over-discharge by VD2, supply

current would be reduced to typ. 0.3uA at

VDD=2.0V and into standby, only the charger

detector is operating.

The output type of Dout pin is CMOS having “H”

level of VDD and “L” level of Vss.

VD3/Excess Current Detector, Short Circuit Protector

Both of the excess current detector and short circuit

protector can work when both control FETs are in

“ON” state.

When the V- pin voltage is going

up to a value between the short protection voltage

Vshort/VDD and excess current threshold VDET3,

the excess current detector operates and further

soaring of V- pin voltage higher than Vshort makes

the short circuit protector enabled. This leads the

external discharge control Nch MOSFET turn off

with the Dout pin being at “L” level.

An output delay time for the excess current detector

is internally fixed, 13ms typ. At VDD=3.0V. Aquick

recovery of V- pin level from a value between

Vshort and VDET3 within the delay time keeps the

discharge control FET staying “H” state.

When the short circuit protector is enabled, the Dout

would be low and its delay time would be 5us typ.

The V- pin has a built-in pulled down resistor, typ.

100kOhm with connecting to the Vss pin.

After an excess current or short circuit protection is

detected, removing a cause of excess current or

external short circuit makes an external discharge

control FET to an “ON” state automatically with the

V- pin level being down to the Vss level through

pulled down resistor built-in internally.

If VDD voltage would be higher than VDET2 at a

time when the excess current is detected the

T63H0002 does not enter a standby mode, or

otherwise in case of lower VDD voltage than

VDET2 would lead the T63H0002 into a standby.

After detecting short circuit the T63H0002 will not

enter a standby mode.

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