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PDF T63H0002A Data sheet ( Hoja de datos )
| Número de pieza | T63H0002A | |
| Descripción | Li-Ion Battery Protector | |
| Fabricantes | Taiwan Memory Technology | |
| Logotipo |  |
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tmCTHE
T63H0002A
T63H0002A
Li-Ion Battery Protector
Features
Low supply current
Supply current
TYP. 5.0uA
Standby current (after detecting over-discharge) TYP. 0.3uA
www.DataSheetH4Ui.gchomaccuracy detector
Over-charge detector(Topt=25ºC)
+/- 25mV
Threshold
Over-charge detector (Topt=0 to 50ºC)
+/- 30mV
Over-discharge detector
+/- 2.5%
Variety of detector threshold Over-charge detector threshold
4.0V to 4.4V step of 0.005V
Over-discharge detector threshold 2.0V to 3.0V step of 0.005V
Built in protection circuit
Excess current protection
0.04V to 0.32V step of 0.04V
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
T63H0002A-AX
4.25V
T63H0002A-BX
4.35V
T63H0002A-CX
4.30V
T63H0002A-DX
…*note1
4.28V
….
note1: New model version and specific
characteristics may be order by customer.
Over charge release
voltage
4.05V
4.15V
4.10V
4.08V
….
marking
002A
002B
002C
002D
Pack type
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
….
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
TM Technology Inc. reserves the right
P. 1
to change products or specifications without notice.
Publication Date: JUL. 2002
Revision:A
1 page  
tmCTHE
T63H0002A
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
www.DataSheete4xUt.ecornmal 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,
TM Technology Inc. reserves the right
P. 5
to change products or specifications without notice.
Publication Date: JUL. 2002
Revision:A
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet T63H0002A.PDF ] | |
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