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MC33346 Datasheet

LITHIUM BATTERY PROTECTION CIRCUIT FOR THREE OR FOUR CELL SMART BATTERY PACKS

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MC33346
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Lithium Battery Protection
Circuit for Three or Four Cell
Battery Packs
The MC33346 is a monolithic lithium battery protection circuit that is
designed to enhance the useful operating life of three or four cell
rechargeable battery packs. Cell protection features consist of
independently programmable charge and discharge limits for both voltage
and current with a delayed current shutdown, cell voltage balancing with
on–chip balancing resistors, and virtually zero current sleepmode state
when the cells are discharged. Additional features consists of a six wire
microcontroller interface bus that can selectively provide a pulse output that
represents the internal reference voltage, cell voltage, cell current and
temperature, as well as control the states of four internal balancing and two
external MOSFET switches. A microcontroller time reference output is
available for gas gauge implementation. This protection circuit requires a
minimum number of external components and is targeted for inclusion within
the battery pack. The MC33346 is available in standard and low profile 24
lead surface mount packages.
LITHIUM BATTERY
PROTECTION CIRCUIT
FOR
THREE OR FOUR CELL
SMART BATTERY PACKS
24
1
24
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
(SO–24L)
DTB SUFFIX
PLASTIC PACKAGE
CASE 948H
(TSSOP–24)
Independently Programmable Charge and
Discharge Limits for Both Voltage and
Current
Delayed Current Shutdown
Cell Voltage Balancing with On–Chip
Resistors
Six Wire Microcontroller Interface Bus
Data Output for Reference, Voltage, Current,
and Temperature
Microcontroller Time Reference Output for
Gas Gauging
Virtually Zero Current Sleepmode State when
Cells are Discharged
Programmable for Three or Four Cell
Applications
Minimum External Components for Inclusion
within the Battery Pack
Available in Low Profile Surface Mount
Packages
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC33346DW
MC33346DTB
TA = –40° to +85°C
SO–24L
TSSOP–24
Typical Four Cell Smart Battery Pack
Cell 4/VCC/
Discharge
Current Limit
3
Cell 3
24
Cell 2
23
Cell 1
22
Ground
Cell 15
Program
11
Temp
8
Current
Sense
Common
7
Charge
Current
Limit
6
Discharge
Gate Drive
Output
14
MC33346
17
A–to–D
Converter
Period
18
VC
Logic
Supply
13
Address
Input
Charge Charge
Gate Drive Gate Drive
Output Common
20 21Cell Voltage
2
Discharge Voltage
Threshold
4
Charge Voltage
Threshold
5
Cell Voltage
Return
1
Data Output
Ref/V/I/T
16
Reference Clock Output
19
Interrupt Output
12
10 9
Data Charge Gate
Input Turn Off/
Test Input
This device contains 4760 active transistors.
This document contains information on a product under development. Motorola reserves the
right to change or discontinue this product without notice.
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Issue 1
1


Motorola Electronic Components Datasheet

MC33346 Datasheet

LITHIUM BATTERY PROTECTION CIRCUIT FOR THREE OR FOUR CELL SMART BATTERY PACKS

No Preview Available !

MC33346
OUTLINE DIMENSIONS
DTB SUFFIX
PLASTIC PACKAGE
CASE 948H–01
(TSSOP–24)
ISSUE O
0.15 (0.006) T U S
24X K REF
0.10 (0.004) M T U S V S
2X L/2
24
L
PIN 1
IDENT.
1
0.15 (0.006) T U S
13
B
–U–
12
A
–V–
0.10 (0.004)
–T– SEATING
PLANE
D
C
G
DETAIL E
H
–W–
NOTES:
1 DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2 CONTROLLING DIMENSION: MILLIMETER.
3 DIMENSION A DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS. MOLD FLASH
OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.
4 DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED
0.25 (0.010) PER SIDE.
5 DIMENSION K DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN
EXCESS OF THE K DIMENSION AT MAXIMUM
MATERIAL CONDITION.
6 TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7 DIMENSION A AND B ARE TO BE DETERMINED
AT DATUM PLANE –W–.
MILLIMETERS
INCHES
DIM MIN MAX MIN MAX
A 7.70 7.90 0.303 0.311
B 4.30 4.50 0.169 0.177
C ––– 1.20 ––– 0.047
D 0.05 0.15 0.002 0.006
F 0.50 0.75 0.020 0.030
G 0.65 BSC
0.026 BSC
H 0.27 0.37 0.011 0.015
J 0.09 0.20 0.004 0.008
J1 0.09 0.16 0.004 0.006
K 0.19 0.30 0.007 0.012
K1 0.19 0.25 0.007 0.010
L 6.40 BSC
0.252 BSC
M 0_ 8_ 0_ 8_
K
K1
ÇÉÇÉÇJ1
ÇÇÉÇÇÉÇÇSECTION N–N
J
N
N
F
DETAIL E
0.25 (0.010)
M
2 MOTOROLA ANALOG IC DEVICE DATA


Part Number MC33346
Description LITHIUM BATTERY PROTECTION CIRCUIT FOR THREE OR FOUR CELL SMART BATTERY PACKS
Maker Motorola
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MC33346 Datasheet PDF






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