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Número de pieza OZ8953
Descripción 5 Cell Li-Ion/Polymer Battery Pack Protection IC
Fabricantes O2Micro 
Logotipo O2Micro Logotipo



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OZ8953
5 Cell
Li-Ion/Polymer Battery Pack Protection IC
FEATURES
„ High Accuracy Voltage Detection
¾ Over voltage threshold range
- VOVP: 3.6~4.35V; ±25 mV
- Hysteresis Voltage: 0V, 0.1~0.275V
¾ Under voltage threshold range
- VUVP: 2.0~3.0V; ±80 mV
- Hysteresis Voltage: 0~1.0V
„ Three-level High Accuracy Over-Current Detection
¾ Over Current 1: VDOC1 = 0.025~0.35V; ±10mV
¾ Over Current 2: VDOC2 = 2.0*VDOC1
¾ Short Circuit: VSC = 4.5*VDOC1
„ Comprehensive Built-in Protection Functions
„ Programmable Delay Timer Setting for OCP
„ Supports three modes for OC/SC release
¾ Charger-plugging in Release
¾ Load-open Release
¾ Timer-Release (optional)
„ Support Over-Temperature Protection (COT & DOT)
„ Permanent Failure (PF): Blow fuse or OV indicator
„ 0V Battery Charge Support
„ Low power consumption:
¾ Normal Mode: <34uA
¾ Shut-Down Mode: <01uA
¾ Sleep Mode: <3.0uA
„ Green Package: SOP16 or SSOP16
APPLICATIONS
„ Power Tools
„ Notebook PC
„ UPS
„ Remote Controlled Vehicles
ORDERING INFORMATION
Part Number Temp Range
Package
OZ8953AA-1 -40°C to 85°C
16-pin
SOP/SSOP
Lead-Free
(See Options Selection Table on page 27, Table 9 & Table 10)
GENERAL DESCRIPTION
OZ8953 is a highly integrated, low cost, battery pack
protection and monitor IC which features Over
Voltage (OV), Under Voltage (UV), Over Current (OC),
Short Circuit (SC), Over Temperature (OT) protection
functions for managing Li-Ion /Polymer, 5 cell battery
packs for power-tools, notebook PC and UPS
applications etc.
OZ8953’s over current protection has high accuracy
voltage detection (±10mV). Thus OZ8953 can use
lower current-sense resistors (such as 2.5m, 5m)
to reduce power dissipation and thermal issues while
maintaining high accuracy current detection.
OZ8953 has three levels over-current protection using
three, accurate integrated comparators. These current
comparators provide accurate and timely protection,
and avoid any unexpected false-trigger situations.
OZ8953 supports three modes for OC/SC release, i.e.
Charger plugging-in Release, Load-open Release and
Timer Release (optional). Timer Release delay time
set shares with OV delay capacitor set. This optional
function will help ensure that the load-always-
connected system can be released when there is no
charger plugging-in.
OZ8953 provides a special EXTC pin to control both
charge and discharge MOSFET. When EXTC pin is in
floating state, OZ8953 will enter sleep mode to save
power consumption; When EXTC pin is tied to VCC,
OZ8953 will enter normal working mode but turn off
charge and discharge MOSFETs; When EXTC pin is
tied to VSS, OZ8953 will also work in normal working
mode, but charge and discharge MOSFETs’ status
will be decided by protection event.
With integrated MOSFET driver circuit, OZ8953 is
able to directly drive both the charge PMOS FET at
Pack+ side and discharge NMOS FET at Pack- side.
6/28/2011
Copyright © 2006-2011 by O2Micro
U.S. Patent #7,965,061 and others pending
OZ8953-DS-V1.1
Page 1
CONFIDENTIAL

1 page




OZ8953 pdf
OZ8953
ABSOLUTE MAXIMUM RATINGS
Table 2 (Ta=25°C unless otherwise specified)
Item
Symbol
Applied Pin
Absolute Maximum Ratings
Supply voltage range between VCC
and VSS pin
VCC
VCC
VSS - 0.3V to VSS + 38V
Input pin voltage 1
Input pin voltage 2
Cell voltage input range:
VIN1 ISEN, UVT, OVT, TS VSS - 0.3V to VSS + 5.0V
VIN2 VM, EXTC VSS - 0.3V to VCC + 0.3V
BAT(k-1) - BAT(k), k=2~5, &
BAT5 - VSS
VCELL
- 0.3V to + 5.0V
CHG pin output voltage
DSG pin output voltage
PF/OVI pin output voltage
Operating free-air temperature range
VCHG
VDSG
VPF/OVI
Ta
CHG
DSG
PF/OVI
- 0.3V to VSS + 38V
VSS - 0.3V to VSS + 15V
VSS - 0.3V to VSS + 5.0V
-40°C to 85°C
Storage temperature range
Tstg
-40°C to 125°C
Package thermal resistance θJA
48.7°C/W
Caution: the absolute maximum ratings are rated values. The physical damage could be suffered beyond these
values. The performance can not be guaranteed at maximum rating.
ELECTRICAL CHARACTERISTICS*(1)
Table 3a (Ta=25°C unless otherwise specified)
Symbol
Parameter
Over-Voltage (OV) Protection*(2)
Conditions
Li-Ion/Polymer
VOVP
Over-Voltage detection Battery: 4.0~4.35V;
threshold
Phosphate Battery:
3.6~3.95V, adjustable
VOV-STEP
Over-Voltage
adjustment per step
Li-Ion/Polymer and
Phosphate battery
VOVR-DELTA
Over-Voltage Release
Hysteresis voltage
Li-Ion/Polymer and
Phosphate battery
VOVR-STEP
Over-Voltage Release
adjustment per step
Li-Ion/Polymer and
Phosphate battery
VOVR
Over-Voltage Release
threshold
VOVR=VOVP-VOVR-DELTA
Permanent-Failure (PF) Blow Fuse Protection*(2)
Permanent Failure
VPF (PF) Blow Fuse VPF=VOVP+150mV
detection threshold
Permanent Failure
VPFR
(PF) Blow Fuse
release threshold
VPFR= VOVR
Under-Voltage (UV) Protection*(2)
VUVP
Under-Voltage
detection threshold
Li-Ion/Polymer and
Phosphate Battery,
2.0~3.0V, adjustable
VUV-STEP
Under-Voltage
threshold adjustment
per step
Li-Ion/Polymer and
Phosphate battery
Min.
Typ.
Max.
VOVP
0.025
VOVP
VOVP +
0.025
50
0V, 0.1~0.275V, adjustable
VOVR -
0.03
12.5
VOVR
VOVR +
0.03
VPF
0.025
VPFR
0.03
VPF
VPFR
VPF +
0.025
VPFR +
0.03
VUVP
0.07
VUVP
100
VUVP +
0.07
Unit
V
mV/step
mV/step
V
V
V
V
mV/step
CONFIDENTIAL
OZ8953-DS-V1.1
Page 5

5 Page





OZ8953 arduino
OZ8953
ELECTRICAL CHARACTERISTICS*(1) (Contd.)
Symbol
Parameter
External Delay/Release Time Set
TOVP
Over-voltage
Protection delay time
TOT-DET
Over-temperature
detection period time
Permanent Failure
TPF (PF) Blow Fuse
Protection delay time
TUVP
Under-voltage
Protection delay time
TSHUT DOWN
Shut down delay time
TDOC1
Discharge
Over-
Current Protection
delay time (level-1)
TDOC2
TSC
TOCR
Power Supply
VCC
VTH-HVNMOS*(5)
Discharge
Over-
Current Protection
delay time (level-2)
Internal fixed Short-
Circuit Protection
delay time
OC/SC release delay
time
The Voltage between
VCC pin and VSS pin
The Threshold of HV
NMOS-FET to
determine charger-in
headroom
VHEAD-ROOM*(6)
Wake-Up Headroom
between charger
input and battery
pack
VPWR-ON-RST*(7)
INORMAL
ISHUT DOWN
ISLEEP
Chip Power On reset
voltage
Power consumption
under normal mode
Power consumption
under shut down
mode
Power consumption
under sleep mode
Conditions
Capacitance on OVT
pin, COVT=0.1uF
Capacitance on OVT
pin, COVT=0.1uF
Capacitance on OVT
pin, COVT=0.1uF;
TPF = 3.0 * TOVP
Capacitance on UVT
pin, CUVT=0.1uF
Capacitance on OVT
pin, COVT=0.1uF;
Capacitance on UVT
pin, CUVT=0.1uF;
TDOC1 = TUVP
TDOC1 =2 * TUVP*(2)
Capacitance on UVT
pin, CUVT=0.1uF;
TDOC2 = 10% * TDOC1
TDOC2 =15% * TDOC1*(2)
Capacitance on OVT
pin, COVT=0.1uF
TOCR=TOVP
CHG pin ramps up,
VBAT1 >VTH-HVNMOS
ICHG >1uA
CHG pin ramps up,
VBAT1 <=VTH-HVNMOS
ICHG >1uA
VCC ramps up
IVCC current from VCC
pin
IVCC current from VCC
pin
EXTC pin floating
Min.
0.6
0.5
1.8
0.7
3.5
0.4
0.8
40
120
100
0.4
4.0*(4)
0.6
CONFIDENTIAL
OZ8953-DS-V1.1
Typ.
0.9
1.0
2.7
1.0
5.5
1.0
2.0
100
300
250*(3)
0.9
3.1
0.4
6.0
7.1
17
0.4
1.6
Max.
1.2
2.0
3.6
1.3
7.5
1.4
2.8
180
540
500
Unit
S
S
S
S
S
S
S
mS
mS
µS
1.4 S
30 V
3.96 V
V
9.2
34*(8)
1.0
3.0
V
V
µA
µA
µA
Page 11

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