TI BQ2158MODULE Three or four series cell li-ion pack supervisor module Datasheet

bq2158
Features
Three or Four Series Cell
Li-Ion Pack Supervisor Module
ä
Complete and compact lithium-ion pack supervisor
ä
Provides overvoltage, undervoltage, and
overcurrent protection for three or four series
Li-Ion cells
ä
Combines bq2058 with charge/discharge control
FETs
ä
High side low on-resistance FETs
ä
Designed for battery pack integration
ä
–
Direct connection for series battery terminals
–
Measures 2.10 X 0.70 inches
Low standby and operating currents
General Description
The bq2158 provides a complete solution for the supervision of three or four series Li-Ion cells. Designed for battery pack integration, the bq2158 incorporates a bq2058
Pack Supervisor, two FETs, and all other components required to monitor overvoltage, undervoltage, and overcu rre n t c o nd i ti o ns. T he bo a r d p r o v id es d ir ec t
connections for the negative and positive terminals of
each cell. See Figure 1. Please refer to the bq2058 data
sheet for specific information on the operation of the
bq2058.
Pin Descriptions
Unitrode configures the bq2158 based on the information in Table 1.
5/99 B
1
B1P
Battery 1 positive input/pack positive
B1N
Battery 1 negative input
B2N
Battery 2 negative input
B3N
Battery 3 negative input
B4N
Battery 4 negative input
POS
Pack positive
NEG
Pack negative
bq2158
Table 1. bq2158 Module Configuration
Customer Name: ___________________________________________________________________________
Contact: _________________________________________
Phone: ______________________________
Address: _________________________________________________________________________________
_________________________________________________________________________________
Sales Contact: ____________________________________
Phone: ______________________________
Number of series cells (3 or 4)
________________________________________
Overvoltage threshold (4.25, 4.30 or 4.35V)
________________________________________
Charge current (3.9A max.)
________________________________________
Discharge current (3.9A max.)
________________________________________
FAE approval: _____________________________________
2
Date: _______________________________
bq2158
Table 2. Pin Connections
Number of Cells
On-board bq2058 Configuration
3 cells
BAT1N tied to BAT1P
NSEL = VSS
4 cells
NSEL = VCC
Operation
The bq2158 monitors each series element for undervoltage, over-voltage, and over-current conditions. If a
cell falls below VUV for tUVD, the bq2158 enters into
sleep mode. The bq2158 wakes up and enables discharge
if a voltage, VCD higher than the battery voltage, is applied across POS and NEG. Charging is disabled if a cell
exceeds VOV for tOVD, and can resume when the cell falls
below the VCE threshold. The bq2158 turns the discharge FET off if the steady state load current exceeds
IOC for tOCD and turns it back on if the load is removed.
B1P
NC
B1P
POS
B1N
B1N
Load
or
Charger
B2N
Load
or
Charger
B2N
B3N
B3N
B4N
POS
B4N
NEG
NEG
Four-Cell Configuration
Three-Cell Configuration
Note: B1P, B4N, POS, and NEG accomodate a #20 AWG stranded wire.
B1N, B2N, and B3N accomodate a #24 AWG stranded wire.
FG2158cc.eps
Figure 1. Module Connection Diagram
3
bq2158
bq2158 Schematic
4
6X .055
.031
LAYER 1
LAYER 2
5
B3N
B2N
B1N
B1P
1.640
1.845
2.045
U1
R5
C1
R3
R4
C2
C4
R7 C3
R2 R6
C9
D2
R1 R11
R10
C5
C10
C7
Q4
1.440
Q2
B4N
Q1
D1
.700
1.065
R9
C6
TP1O
NEG
POS
Q3
.915
0
.055
bq2158
bq2158 Board
2.100
C8
R8
.065
.068
bq2158
Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
Conditions
VOP
Supply voltage (B1P to B4N)
18
V
DC
VTR
Maximum transient voltage (B1P to B4N)
32
V
Maximum duration = 1.5µs
VCHG
Charging voltage (POS to NEG)
18
V
ICHG
Continuous charge/discharge current
3.9
A
TOPR
Operating temperature
-30 to +70
°C
TSTG
Storage temperature
-55 to +125
°C
Note:
VOP > 6V
TA = 25°C
Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Functional operation
should be limited to the Recommended DC Operating Conditions detailed in this data sheet. Exposure to conditions beyond the operational limits for extended periods of time may affect device reliability.
DC Electrical Characteristics (TA = TOPR)
Symbol
Parameter
Minimum
Typical
Maximum
Unit
4.0
-
18
V
Conditions/Notes
VOP
Operating voltage, B1P to
B4N
ICCA
Operating current
-
39
57
µA
ICCS
Sleep current
-
0.7
1.5
µA
No load across POS and
NEG
RON
On resistance, B1P to POS
-
-
50
mΩ
TA = 25°C
VOP = 10V
6
bq2158
DC Thresholds (TA = TOPR)
Symbol
Parameter
Value
Tolerance
Unit
VOV
Overvoltage threshold
4.25
± 50mV
V
VCE
Charge enable voltage
VOV - 100mV
± 50mV
V
VUV
Undervoltage limit
2.25
± 100mV
V
IOC
Overcurrent limit
Notes
3.4
A
TA = 25°C
3.8
A
TA = 60°C
TA = 30°C
tUVD
Undervoltage delay
950
±50%
ms
VCD
Charge detect threshold
70
-60, +80
mV
tOVD
Overvoltage delay
950
±50%
ms
TA = 30°C
tOCD
Overcurrent delay
12
±60%
ms
TA = 30°C
Note:
The thresholds above reflect the operation of a bq2158 using the standard bq2058 IC (VOV = 4.25V).
Specify other versions of the bq2058 by indicating the appropriate VOV threshold in Table 1.
Data Sheet Revision History
Change No.
Page No.
1
3
Note:
Description
Nature of Change
Table 2 pin connections
Clarified onboard bq2058 connection.
Change 1 = May 1999 B changes from July 1996.
Ordering Information
bq2158
B —
Customer Code:
Blank = Sample or Pre-production1
XXX = Customer-specific; assigned by Unitrode2
Package Option:
B = Board-level product
Device:
Three- or Four-Series Cell Li-Ion Supervisor Module
Notes:
1. Requires configuration sheet (Table 1)
2. Example production part number: bq2158B-001
7
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright  1999, Texas Instruments Incorporated
Similar pages