T63H0002A

TM Technology Inc. reserves the right P. 1 Publication Date: JUL. 2002
to change products or specifications without notice. Revision:A

T63H0002A

Li-Ion Battery Protector

Features

Supply current

TYP. 5.0uA

Low supply current

Standby current (after detecting over-discharge)

TYP. 0.3uA

Over-charge detector(Topt=25ºC)

+/- 25mV

Over-charge detector (Topt=0 to 50ºC)

+/- 30mV

High accuracy detector

Threshold

Over-discharge detector

+/- 2.5%

Over-charge detector threshold

4.0V to 4.4V step of 0.005V

Variety of detector threshold

Over-discharge detector threshold 2.0V to 3.0V step of 0.005V

Excess current protection

0.04V to 0.32V step of 0.04V

Built in protection circuit

Accuracy

±15%

Output delay of over charge

Time delay at C3=0.01uF & VDD=4.3V

170mS

note1

Output delay of over-discharg

VDD=2.4V with built-in capacitor

10mS

Small package

SOT23-6/6-pin

note1: The result was measured from T63H0002A-AX

Part Number Examples

Part No.

Over charge detection

voltage

Over charge release

voltage

marking Pack

type

T63H0002A-AX 4.25V

4.05V

002A

SOT-23-6

T63H0002A-BX 4.35V

4.15V

002B

SOT-23-6

T63H0002A-CX 4.30V

4.10V

002C

SOT-23-6

T63H0002A-DX 4.28V

4.08V

002D

SOT-23-6

...

*note1

....

note1: New model version and specific
characteristics may be order by customer.

General Description

The T63H0002A 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

T63H0002A

TM Technology Inc. reserves the right P. 2 Publication Date: JUL. 2002
to change products or specifications without notice. Revision:A

"VREL1" in the T63H0002A.

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 T63H0002A detect the over-discharge
voltage, connect a charger to the battery pack,
and when the battery supply voltage becomes
higher than the over-discharge detector
threshold, VD2 is released and the voltage of
Dout becomes "H" level.

An excess load current can be sensed and

cut off after internally fixed delay time passed
through the built in excess current detector, VD3

with Dout being enabled to low level. Once after
detecting excess current, the VD3 is released
and Dout level switches to high by detaching a
battery pack from a load system.

Further, short circuit protector makes Dout

level to low immediately with external short
circuit current and re-moving external short
circuit leads Dout level to high. After detecting
over-discharge, supply current will be kept
extremely low by halt some internal circuits
operation. The output delay of over-charge
detectors can be set by connecting external
capacitors. Output type of Cout and Dout are
CMOS. 6-pin, SOT23-6 is available.

BLOCK DIAGRAM

T63H0002A

TM Technology Inc. reserves the right P. 3 Publication Date: JUL. 2002
to change products or specifications without notice. Revision:A

Pin Configurations

PIN DESCRIPTION

Pin No.

Symbol

Pin description

Dout

Output of over-discharge detection, CMOS output

V-

Pin for charge negative input

Cout

Output of over-charge detection, CMOS output

Pin for external capacitor setting output delay of VD1

5 VDD

Power

supply

6 Vss

Ground

ABSOLUTE MAXIMUM RATINGS

Vss=0V

Symbol Item

Ratings Unit

VDD

Supply voltage

-0.3 to 20

V-

Vct

Input voltage
V- pin
Ct pin

-20 to V

+0.3

Vss-0.3 toV

+0.3

V
V

Vcout

Vdout

Output voltage
Cout pin
Dout pin

-20 to V

+0.3

Vss-0.3 toV

+0.3

V
V

Power

dissipation

150

Topt

Operating temperature range

-40 to85

ºC

Tstg

Storage temperature range

-55 to 125

ºC

Absolute Maximum ratings are threshold limit values that must not be exceeded ever for an instant
under any conditions. Moreover, such values for any two items must not be reached simultaneously.
Operation above these absolute maximum ratings may cause degradation or permanent damage to the
device. These are stress ratings only and do not necessarily imply functional operation below these
limits.

T63H0002A

TM Technology Inc. reserves the right P. 4 Publication Date: JUL. 2002
to change products or specifications without notice. Revision:A

ELECTRICAL CHARACTERISTIC

Temp=25ºC

Symbol Item

Conditions

MIN.

TYP.

MAX.

Unit

VDD1

Operating input voltage

Voltage defined as VDD-V-

Temp

25ºC

4.225

4.250

4.275

-AX

0~50ºC

*Note

4.220 4.250 4.280 V

25ºC 4.325 4.350 4.375 V

-BX 0~50ºC

*Note

4.320 4.350 4.380 V

25ºC 4.275 4.300 4.325 V

-CX 0~50ºC

*Note

4.270 4.300 4.330 V

25ºC 4.255 4.28 4.305 V

VDET1 Over-charge

threshold

Detect rising

edge of supply

voltage

-DX 0~50ºC

*Note

4.250 4.28 4.310 V

-AX 4.00 4.05 4.10 V
-BX 4.10 4.15 4.20 V
-CX 4.05

4.10

4.15

VREL1

Release voltage for

over-charge detection

-DX 4.03 4.08 4.13 V

tVDET1 Output delay of over charge

C3=0.01uF,

VDD=3.6V to 4.3V

140 170 210 ms

-AX,-BX

-CX

2.437 2.500 2.563 V

VDET2 Over-discharge

threshold

Detect falling edge of

supply voltage

-DX 2.837 2.900 2.963 V

tVDET2

Output delay of

over-discharge

VDD=3.6V to 2.4V

VDET3

Excess current threshold

Detect rising edge of "V-" pin

voltage

0.1 0.12 0.14 V

tVDET3

Output delay of excess

current

VDD=3.0V 9

Vshort

Short protection voltage

VDD=3.0V

VDD-

1.2

VDD-

0.9

VDD-

0.6

tshort

Output delay of short

protection

VDD=3.0V

Rshort

Reset resistance for excess

current protection

VDD=3.6V,

V-=1.0V

50 100 150

kOhm

Vol1

Nch ON voltage of Cout

Iol=50uA,

VDD=4.4V

0.35

0.5 V

Voh1

Pch ON voltage of Cout

Iol=-50uA,

VDD=3.9V

3.4 3.7 V

Vol2

Nch ON voltage of Dout

Iol=50uA,

VDD=2.4V

0.2

0.5 V

Voh2

Pch ON voltage of Dout

Iol=-50uA,

VDD=3.9V

3.4 3.7 V

IDD

Supply current

VDD=3.9V, V-=0V

5.0

9.0

Istandby Standby

current

VDD=2.0V

0.3

0.6

*Note: Considering of variation in process parameters, we compensate for this characteristic related to
temperature by laser-trim, however, this specification is guaranteed by design, not production tested.

T63H0002A

TM Technology Inc. reserves the right P. 5 Publication Date: JUL. 2002
to change products or specifications without notice. Revision:A

OPERATION

VD1/Over-Charge Detector

The VD1 monitors VDD pin voltage. When the
VDD voltage crosses over charge detector threshold
VDET1 from a low value to a value higher than the
VDET1, the VD1 can sense a over-charging and an
external charge control Nch-MOS-FET turns to
"OFF" with Cout pin being at "L" level.
There can be two cases to reset the VD1 making the
Cout pin level to "H" again after detecting
over-charge. Resetting the VD1 can make charging
system allowable to resumption of charging process.
The first case is in such conditions that a time when
the VDD voltage is coming down to a level lower
than "VREL1". While in the second case,
connecting a kind of loading to VDD after
disconnecting a charger from the battery pack can
make the VD1 resetting when the VDD level is in
between "VDET1" and "VREL1".
After detecting over-charge with the VDD voltage of
higher than VDET1, connecting system load to the
battery pack makes load current allowable through

parasitic diode of external charge control FET. The
Cout level would be high when the VDD level is
coming down to a level below the VDET1 by
continuous drawing of load current.
An output delay time for over-charge detection can
be set by external capacitor C3 connecting between
the Vss pin and Ct pin. The external capacitor can
make a delay time from a moment detecting
over-charge to a time output a signal which enables
charge control FET turn off.
When the VDD level is going up to a higher level
than VDET1 if the VDD voltage would be back to a
level lower than the VDET1 within a time period of
the output delay time, VD1 would not output a signal
for turning off the charge control FET.
A level shifter incorporated in a buffer driver for the
Cout pin makes the "L" level of Cout pin to the V-
pin voltage and the "H" level of Cout pin is set to
VDD voltage with CMOS buffer

VD2/Over-Discharge Detector

The VD2 is monitoring a VDD pin voltage. When
the VDD voltage crosses the over-discharge detector
threshold VDET2 from a high value to a value lower
than the VDET2, the VD2 can sense an
over-discharging and the external discharge control
Nch MOSFT turns to "OFF" with the Dout pin being
at "L" level.
To reset the VD2 with the Dout pin level being "H"
again after detecting over-discharge it is necessary to
connect a charger to the battery pack for T63H0002.
When the VDD voltage stays under over-discharge

detector threshold VDET2 charge current can flow
through parasitic diode of external discharge control
MOSFET, then after the VDD voltage comes up to a
value larger than VDET2, Dout becomes "H" and
discharging process would be able to advance
through ON state MOSFET for discharge control.
Connecting a charger to the battery pack makes the
Dout level being "H" instantaneously when the
VDD voltage is higher than VDET2.
Besides, for T63H0002, when a cell voltage reaches
equal or more than over-discharge released voltage,

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.

T63H0002A

TM Technology Inc. reserves the right P. 7 Publication Date: JUL. 2002
to change products or specifications without notice. Revision:A

Application Circuits

Application Hints

R1 and C1 will stabilize a supply voltage to

the T63H0002. A recommended R1 value is less
than 1kOhm. A larger value of R1 leads higher
detection voltage, makes some errors, because
of shoot through current flowed in the
T63H0002.

R2 and C2 will stabilize a V- pin voltage.

The resetting from over-discharge with
connecting a charger possibly be disabled by
larger value of R2.

Recommended value is less than 1kOhm.

After over-charge detection even connecting
battery pack to a system probably could not
allow a system to draw load current by a larger
R2xC2 time constant in the T63H0002.

Recommended C2 value is less than 1uF.

R1 and R2 may cause power consumption

over rating of power dissipation of the
T63H0002 and a total of "R1+R2" should be
more than 1kOhm.

The time constants R1xC1 or R2xC2 must

have a relation as below:

R1xC1<=R2xC2

Because in case that R1xC1, time constant for
VDD pin, would be larger than R2xC2, time
constant for V- pin then the T63H0002 might be
into a standby mode after detecting excess
current or short circuit current.

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