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MC33346
LITHIUM BATTERY
PROTECTION CIRCUIT
FOR
THREE OR FOUR CELL
SMART BATTERY PACKS
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.
24
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
(SO–24L)
24
1
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
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
Current
Sense
Common
7
Charge
Current
Limit
6
Discharge
Gate Drive
Output
14
Charge
Gate Drive
Output
20
Charge
Gate Drive
Common
21 Cell Voltage
2
Discharge Voltage
Threshold
4
Charge Voltage
Threshold
5
MC33346
Cell Voltage
Return
1
Data Output
Ref/V/I/T
16
Reference Clock Output
19
Interrupt Output
ORDERING INFORMATION
Device
MC33346DW
MC33346DTB
TA = –40° to +85°C
Operating
Temperature Range
Package
SO–24L
TSSOP–24
11
Temp
8
17
A–to–D
Converter
Period
18
VC
Logic
Supply
13
Address
Input
10
Data
Input
12
9
Charge Gate
Turn Off/
Test Input
This device contains 4760 active transistors.
3–328
MOTOROLA ANALOG IC DEVICE DATA
Tape and Reel Options
In Brief . . .
Motorola offers the convenience of Tape and Reel
packaging for our growing family of standard integrated circuit
products. Reels are available to support the requirements of
both first and second generation pick–and–place equipment.
The packaging fully conforms to the latest EIA–481A
specification. The antistatic embossed tape provides a
secure cavity, sealed with a peel–back cover tape.
Page
Tape and Reel Configurations . . . . . . . . . . . . . . . . . . . . . 12–2
Tape and Reel Information Table . . . . . . . . . . . . . . . . . . . 12–4
Analog MPQ Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12–5
MOTOROLA ANALOG IC DEVICE DATA
12–1
Tape and Reel Configurations
(continued)
TO–92 Reel Styles
STYLE A
(Preferred)
Carrier Strip
Rounded
Side
STYLE E
Carrier Strip
Flat Side
Adhesive Tape
Adhesive Tape
Feed
Feed
Rounded side of transistor and adhesive tape visible.
Flat side of transistor and adhesive tape visible.
STYLE P
(Preferred)
Adhesive Tape On
Top Side
Feed
Rounded Side
TO–92 Ammo Pack Styles
STYLE M
Adhesive Tape On
Top Side
Feed
Flat Side
Carrier
Strip
Label
Rounded side of transistor and
adhesive tape visible.
Label
Style P ammo pack is equivalent to Styles A and B of reel pack
dependent on feed orientation from box.
Style M ammo pack is equivalent to Style E of reel
pack dependent on feed orientation from box.
TO–92 EIA Radial Tape in Fan Fold Box or On Reel
H2A
H2A
H2B
H
W2
H4 H5
L1
L
F1
F2
P2
P1
P
P2
D
H1
W1 W
T
T2
T1
MOTOROLA ANALOG IC DEVICE DATA
ÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
Carrier
Strip
Flat side of transistor and
adhesive tape visible.
H2B
ÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉ
12–3
Tape and Reel Information Table
Package
SO–8, SOP–8
SO–14
SO–16
SO–16L, SO–8+8L WIDE
SO–20L WIDE
SO–24L WIDE
SO–28L WIDE
SO–28L WIDE
Micro–8
PLCC–20
PLCC–28
PLCC–44
PLCC–52
PLCC–68
PLCC–84
TO–226AA (TO–92)(2)
DPAK
D2PAK
SOT–23 (5 Pin)
SOT–89 (3/5 Pin)
Tape Width
p
(mm)
12
16
16
16
24
24
24
32
12
16
24
32
32
44
44
18
16
24
8
12
Devices(1)
per Reel
2,500
2,500
2,500
1,000
1,000
1,000
1,000
1,000
2,500
1,000
500
500
500
250
250
2,000
2,500
800
3,000
1,000
Reel Size
(inch)
13
13
13
13
13
13
13
13
13
13
13
13
13
13
13
13
13
13
7
7
Device
Suffix
R2
R2
R2
R2
R2
R2
R2
R3
R2
R2
R2
R2
R2
R2
R2
RA, RE, RP, or RM
(Ammo Pack) only
RK
R4
TR
T1
(1) Minimum order quantity is 1 reel. Distributors/OEM customers may break lots or reels at their option, however broken reels may not be returned.
(2) Integrated circuits in TO–226AA packages are available in Styes A and E only, with optional “Ammo Pack” (Suffix RP or RM). The RA and RP configurations
are preferred. For ordering information please contact your local Motorola Semiconductor Sales Office.
12–4
MOTOROLA ANALOG IC DEVICE DATA
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