TMT T63H0001A-BX

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T63H0001A
Li-Ion Battery Protector
T63H0001A
Features
Low supply current
Supply current
TYP. 5.0uA
Standby current (after detecting over-discharge) TYP. 0.3uA
High withstand voltage
Absolute maximum ratings
20V(VDD-VM)
High accuracy detector
Over-charge detector
+/- 25mV
Over-discharge detector
+/- 2.5%
Over-charge detector threshold
4.0V to 4.4V
Over-discharge detector threshold
2.4V to 3.0V
Threshold
Variety of detector threshold
Built in protection circuit
Excess current trip/Short circuit protector
Output delay of over charge
Time delay at C3=0.01uF & VDD=4.3V
170Msnote1
note1: The result was measured from T63H0001A-AX.
Part Number Examples
Over charge detection
Over charge release
voltage
voltage
T63H0001A-AX
4.25V
T63H0001A-BX
Part No.
marking
Pack type
4.05V
001A
SOT-23-6
4.35V
4.15V
001B
SOT-23-6
T63H0001A-CX
4.30V
4.10V
001C
SOT-23-6
…*note1
….
….
….
note1: New model version and specific characteristics may be order by customer.
General Description
The T63H0001A series are protection ICs for
over-charge/discharge of rechargeable one-cell
Lithium-ion (Li+) batteries by CMOS process.
The T63H0001A series can detect
over-charge/discharge of Li+ one-cell and
excess load current, further include a short
circuit protector for preventing large external
short circuit current.
Each of these ICs is composed of three voltage
detectors, a reference unit, a hysteresis circuit,
and a short circuit protector. When charging
voltage crosses the detector threshold from a
low value to a 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 pin becomes “H” when the VDD
voltage is coming down to a level lower than
“Vdet1-Vhys1”, or when a charger is
disconnected from the battery pack while the
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P. 1
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Publication Date: MAR. 2004
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T63H0001A
VDD level is in between “Vdet1” and
“Vdet1-Vhys1” in the T63H0001A version.
The output of Dout pin, the output of
over-discharge detector/VD2, switches to
“Low” after internally fixed delay time passed,
when discharging voltage crosses the detector
threshold from a high value to a value lower than
Vdet2. 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 “H” by detaching a
battery pack from a load system.
Further, short circuit protector makes Dout level
to “L” immediately with external short circuit
current and removing external short circuit leads
Dout level to “H”. After detecting
over-discharge, supply current will be kept
extremely “L’ by halting 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. SOT-23-6 is available.
Block Diagram
5 VDD
2 Ct
Level Shift
1 Cout
VD1
VD2
Over-discharge &
Excess current &
Short circuit detector
controller
4 Dout
VD3
6 VM
3 VSS
Pin Configurations
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Publication Date:MAR. 2004
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T63H0001A
Pin description
Pin No.
Symbol
Pin description
1
Cout
2
Ct
Pin for external capacitor setting output delay of VD1
3
Vss
Ground
4
Dout
Output of over-discharge detection, CMOS output
5
Vdd
Power supply
6
VM
Pin for charger negative input
Output of over-charge detection, CMOS output
ABSOLUTE MAXIMUM RATINGS
Vss=0V
Symbol
Item
Rating
Unit
Vdd
Supply Voltage
Vdd-VM
-0.3 to 20
V
VM
Input Voltage
VM pin
Vdd-20 to Vss+0.3
V
Ct pin
Vss-0.3 to Vss+0.3
V
Cout pin
Vdd-20 to Vss+0.3
V
Dout pin
Vss-0.3 to Vss+0.3
V
150
mV
Vct
Vcout
Output Voltage
Vdout
Pd
Power Dissipation
Topt
Operating Temperature Range
-40 to +85
ºC
Tstg
Storage Temperature Range
-55 to +125
ºC
Absolute Maximum ratings are threshold limit values that must not be exceeded even 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.
TM Technology Inc. reserves the right
to change products or specifications without notice.
P. 3
Publication Date:MAR. 2004
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T63H0001A
Electrical Characteristic
temp=25ºC
Symbol
Item
Conditions
Min.
VDD1
Operating input voltage
Voltage defined as Vdd-VM
2.4
Over-charge threshold voltage
Detect rising edge of
(Over charge detection voltage)
supply voltage
Vdet1
Over charge release
Voch
-
Typ.
Max.
Unit
18
V
-AX
4.20
4.25
4.30
V
-BX
4.30
4.35
4.40
V
-CX
4.25
4.30
4.35
V
-AX
4.00
4.05
4.10
V
-BX
4.10
4.15
4.20
V
-CX
4.05
4.10
4.15
V
voltage
Vhys1
Over-charge threshold hysteresis range
Vhys1=Vdet1-voch
0.15
0.20
0.25
V
Tvdet1
Output delay time of over-charge
C3=0.01uF, Vdd=3.6V ! 4.3V
140
170
210
ms
Vdet2
Over-discharge threshold voltage
2.50
2.563
V
Tvdet2
Output delay time of over-discharge
Vdd=3.6V ! 2.4V
7
10
13
ms
Vdet3
Excess current threshold voltage
Detect rising edge of VM pin voltage
0.1
0.12
0.14
V
Tvdet3
Output delay time of excess current
Vdd=3V
9
13
17
ms
Vshort
Short detection voltage
Vdd=3V
Detect falling edge of supply voltage 2.437
Vdd-1. Vdd-0. Vdd-0.
1
Tshort
Output delay time of short current
Rshort Reset resistor for excess current protection
Vdd=3V
VDD=3.0V, VM=1.0V
50
V
8
5
5
50
us
100
150
Kohm
0.2
0.5
V
Vol1
Nch ON voltage of Cout
Iol=50uA, Vdd=4.4V
Voh1
Pch ON voltage of Cout
Ioh=-50uA, Vdd=3.9V
Vol2
Nch ON voltage of Dout
Iol=50uA, Vdd=2.4V
Voh2
Pch ON voltage of Dout
Ioh=-50uA, Vdd=3.9V
Idd
Supply current
Vdd=3.9V, VM=0V
5.0
9.0
uA
Istandby
Standby current
Vdd=2.0V
0.3
0.6
uA
3.4
0.2
3.4
V
3.8
V
0.5
V
3.7
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 Vdelt1, the VD1 can sense
over-charging and an external charge control
Nch-MOS-FET turns to “OFF” with Cout pin
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being at “L”.
An output delay time for over-charge detection
can be set by an external capacitor C3
connecting 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
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T63H0001A
which enables charge control Nch-MOS-FET
for turning to “OFF”. Though the VDD voltage
would be going up to a higher level than Vdet1 if
it is within a time period of the output delay time,
VD1 would not be output a signal for turning
“OFF” of charge control Nch-MOS-FET.
A level shifter incorporated in a buffer driver for
the Cout pin makes the “L” of Cout pin to the
VM pin voltage and the “H” of Cout pin is set to
VDD voltage with CMOS buffer.
Reset conditions from overcharging
There can be two cases to reset the VD1 making
the Cout pin level to “H” again after detecting
overcharge. Resetting the VD1 makes the
charging system ready for resumption of
charging process.
The first case is in such condition that a time
when the VDD voltage is coming down to a
level lower than “Vdet1-Vhys1”. While in the
second case, disconnecting a charger from the
battery pack can make the VD1 resetting when
the VDD level is within hysteresis width
(Vdet1-Vhys1<=VDD<Vdet1)
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 Nch-MOS-FET. The Cout level
would be “H” when the VDD level is coming
down to a level below the Vdet1 by continuous
drawing of load current.
VD2/Over-Discharge Detector
The VD2 monitors 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-MOS-FET turns to “OFF” with
Dout pin being at “L”.
Resetting the VD2 with the Dout pin level being
“H” again after detecting over-discharge is only
possible by connecting a charger to the battery
VDD voltage is higher than Vdet2.
An output delay time for the over-discharge
detection is fixed internally. Through the VDD
voltage would be going down to a lower level
than Vdet2 if it is within a time period of the
output delay time, VD2 would not output a
signal for turning “OFF” of discharge control
pack. When the VDD voltage stays under
over-discharge detector threshold Vdet2 charge
current can flow through parasitic diode of
external control Nch-MOS-FET, then after the
VDD voltages comes up to a value larger than
Vdet2 discharging process would be advanced
through “ON” state discharge control
Nch-MOS-FET. Connecting a charger to the
battery pack makes the Dout level being “H”
instantaneously when the
Nch-MOS-FET.
After detection of an over-discharge by VD2,
supply current would be reduced to 0.3uA TYP.
At VDD=2V 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
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Publication Date:MAR. 2004
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T63H0001A
Nch-MOS-FET are in “ON” state.
When VM pin voltage is going up to a value
between the short protection voltage Vshort and
excess current threshold Vdet3, the excess
current detector operates and further soaring of
VM pin voltage higher than Vshort makes the
short circuit protector enabled. As a result the
external discharge control Nch-MOS-FET turns
to “OFF” with Dout pin being at “L”.
An output delay time for the excess current
detector is internally fixed, about 13ms TYP. At
VDD=3V. A quick recovery of VM pin level
from a value between Vshort and Vdet3 within
the delay time keeps the discharge control FET
staying “ON” state. When the short circuit
protector is enabled, the Dout would be “L” and
its delay time would be 5us TYP.
The VM pin has a built-in pull down resistor,
TYP. 100K Ohm, connected to the VSS pin.
After an excess current or a short circuit
protection is detected, removing a cause of
excess current or external short circuit makes an
external discharge control Nch-MOS-FET to an
“ON” state automatically with the VM pin level
being down to the VSS level through the built-in
pull down resistor.
When VDD voltage is higher than Vdet2 at a
time when the excess current is detected the
T63H0001A does not enter a standby mode,
while VDD voltage is lower than Vdet2 the
T63H0001A enters a standby mode. After
detecting short circuit the T63H0001A will not
enter a standby mode.
Application Circuits
R1=100Ohm
5 VDD
C2
0.1uF
2 Ct
T63H0001A
6 VM
C3
0.01uf
3 VSS
4
Dout
1
Cout
R2
1K
C2 0.1uF
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to change products or specifications without notice.
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Publication Date:MAR. 2004
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T63H0001A
PACKAGE DIMENSION (Unit: mm)
SOT-23-6
TAPING SPECIFICATION (Unit: mm)
SOT-23-6
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to change products or specifications without notice.
P. 7
Publication Date:MAR. 2004
Revision:A