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부품번호 | OZ8953AA-1 기능 |
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기능 | 5 Cell Li-Ion/Polymer Battery Pack Protection IC | ||
제조업체 | O2Micro | ||
로고 | |||
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 2.5mΩ, 5mΩ)
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
PIN DIAGRAM
OZ8953
Figure 2 OZ8953 Pin Diagram
PIN DESCRIPTION
Table 1 Pin Description
Pin No. Pin Name
1 CHG
I/O
I/O
2 VM I
3
DSG
O
4
ISEN
I
5
UVT
I/O
6
OVT
I/O
7
VSS
P
8 TS I/O
9 PF/OVI O
10
EXTC
I
11
BAT5
I
12
BAT4
I
13
BAT3
I
14
BAT2
I
15
BAT1
I
16
VCC
P
Type
Analog
Analog
Analog
Analog
Analog
Analog
Power
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Power
Description
Charge power MOSFET control and charger-in
detection pin.
Voltage Monitor input pin. It is for OC/SC release
when load opens.
Discharge power MOSFET control pin.
Current sense input for OC/SC protection.
Under Voltage protection delay time set pin.
Over Voltage protection delay time set pin.
GROUND pin.
Thermal sense input pin/Test input pin.
Permanent-Failure (PF) Blow Fuse Protection. (Active
high) or Over Voltage Indication (Active high), This is
an alternative function pin.
External control pin – Control both charge &
discharge Power MOSFET.
Connect to Cell5 positive terminal and Cell4 negative
terminal.
Connect to Cell4 positive terminal and Cell3 negative
terminal.
Connect to Cell3 positive terminal and Cell2 negative
terminal.
Connect to Cell2 positive terminal and Cell1 negative
terminal.
Connect to Cell1 positive terminal.
Power supply pin.
CONFIDENTIAL
OZ8953-DS-V1.1
Page 4
4페이지 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
0.5
1.0
50
210
100
0.5
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
1.3
2.8
150
390
500
Unit
S
S
S
S
S
S
S
mS
mS
µS
1.3 S
30 V
3.7 V
V
9.2
25*(8)
0.7
2.5
V
V
µA
µA
µA
Page 7
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부품번호 | 상세설명 및 기능 | 제조사 |
OZ8953AA-1 | 5 Cell Li-Ion/Polymer Battery Pack Protection IC | O2Micro |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |