MOTOROLA MC33347A User Manual
查询MC33348供应商
Order this document by MC33347A/D
The MC33347A is a monolithic lithium battery protection circuit that is
designed to enhance the useful operating life of one or two cell
rechargeable battery packs. Cell protection features consist of
independently programmable charge and discharge limits for both voltage
and current, a delayed current shutdown, continuous cell voltage balancing
with the choice of on–chip or external balancing resistors, and a virtually
zero current sleepmode state when the cells are discharged.
Additional features include an on–chip charge pump for reduced
MOSFET losses while charging or discharging a low cell voltage battery
pack. This protection circuit requires a minimum number of external
components and is targeted for inclusion within the battery pack. This
MC33347A is available in standard and low profile 16 lead surface mount
packages.
• Programmable for One or Two Cell Applications
• Independently Programmable Charge and Discharge Limits for Both
Voltage and Current
• Charge and Discharge Current Limit Detection with Delayed Shutdown
• Continuous Cell Voltage Balancing
• On–Chip and External (optional) Balancing Resistors
• Virtually Zero Current Sleepmode State when Cells are Discharged
• Charge Pump for Reduced Losses with a Low Cell Voltage Battery Pack
• Minimum External Components for Inclusion within the Battery Pack
• Available in Low Profile Surface Mount Packages
LITHIUM BATTERY
PROTECTION CIRCUIT
FOR
ONE OR TWO CELL
SMART BATTERY PACKS
SEMICONDUCTOR
TECHNICAL DATA
D SUFFIX
16
1
16
1
PIN CONNECTIONS
PLASTIC PACKAGE
CASE 751B
(SO–16)
DTB SUFFIX
PLASTIC PACKAGE
CASE 948F
(TSSOP–16)
Typical Two Cell Smart Battery Pack
R
Lim(dschg)
13
4
Rb2
2
3
Rb1
1
16
15 14 12 11
CO
Discharge
MOSFET Q2
reserves the right to change or discontinue this product without notice.
MOTOROLA ANALOG IC DEVICE DATA
R
MC33347A
Lim(chg)
109
Charge
MOSFET Q1
Balance 1
Balance 2
Cell Voltage 1/V
Cell Voltage 1/VCC/
Discharge Current Limit/
6
R1
7
R2
8
R3
5
High Current Threshold
Cell Voltage Return
Cell Voltage Positive
Discharge Voltage
Threshold
Charge Voltage
Threshold
116
2
3
C
4
5
6
7
8
(Top View)
Ground
Charge Pump Output
15
Discharge
14
Gate Drive Output
Cell Program/
13
T est
Charge
12
Gate Drive Output
Charge
11
Gate Drive Common
Charge Current Limit/
10
Balance Disable
Current Sense
9
Common
ORDERING INFORMATION
Operating
Device
MC33347AD
MC33347ADTB
Motorola, Inc. 1999 Rev 0This document contains information on a product under development. Motorola
Temperature Range
TA = –40° to +85°C
Package
SO–16
TSSOP–16
1
MC33347A
MAXIMUM RATINGS
Ratings Symbol Value Unit
Input Voltage (Measured with Respect to Ground, Pin 16)
Balance 1, 2 (Pins 1, 2) 10
Cell 1 (Pin 3) 7.5
Cell 2 (Pin 4) 10
Cell Voltage Divider (Pins 5, 6, 7 and 8) 10
Current Sense Common (Pin 9) 10
Charge Current Limit (Pin 10) 10
Charge Gate Drive Common (Pin 11) ±13
Charge Gate Drive Output (Pin 12) –14 to +12
Cell Program/Test (Pin 13) 10
Discharge Gate Drive Output (Pin 14) 10
Charge Pump Output (Pin 15) 10
External Cell Balancing Current (Pin 1, 2, Note 1)
Cell Voltage Divider Current
Source Current (Pin 4 to 6) or (Pin 3 to 6) 0.5
Sink Current (Pin 3 to 5) or (Pin 16 to 5) 0.5
Thermal Resistance, Junction–to–Air
DTB Suffix, TSSOP–16 Plastic Package, Case 948F 176
D Suffix, SO–16 Plastic Package, Case 751B 145
Operating Junction Temperature (Notes 1, 2 and 3)
Storage Temperature
NOTE: ESD data available upon request.
R
V
I
bal
I
div
θJA
T
T
IR
J
stg
1.0
–40 to +150
–55 to +150
V
A
mA
°C/W
°C
°C
ELECTRICAL CHARACTERISTICS (T
Characteristic
VOLTAGE SENSING
Charge or Discharge Voltage Inputs (Pin 7 or 8 to Pin 5)
Threshold Voltage V
TA = 25°C – 1.230 –
TA = T
Input Bias Current I
Input Hysteresis Source Current (Pin 8)
Cell Charge or Discharge Programmable Input Voltage Range (Pin 7 or 8)
Cell Selector Series Resistance
Cell Positive to Top of Divider (Pin 3 or 4 to Pin 6) R
Cell Negative to Bottom of Divider (Pin 3 or 16 to Pin 5) R
Cell Voltage Sampling Rate
V
Pin 9
V
Pin 9
Cell Program/ Test Input Threshold V oltage (Pin 13)
CELL VOLTAGE BALANCING
Cell Voltage Balancing Accuracy (Note 4)
Internal Balancing Resistance (Pin 3, 4)
Balancing MOSFET On Resistance (Pin 1, 2)
NOTES: 1. Maximum package power dissipation limits must be observed.
to T
low
high
< V
> V
2. Low duty cycle pulse techniques are used during test to maintain the junction temperature as close to ambient as possible.
3. Tested ambient temperature range for the MC33347A:
4. Cell balancing is active when the percent change in voltage exceeds the typical limit specified. This parameter is measured by holding one cell at a
fixed voltage while the other is varied so that balancing is activated. It is defined by:
+ 10mV – 1.0 –
Pin 4
+ 10mV – 0.004 –
Pin 4
T
= –25°CT
low
= 25°C unless otherwise noted.)
A
= +85°C
high
Variable Cell Voltage*Fixed Cell Voltage
ǒ
D%+
Fixed Cell Voltage
Symbol Min Typ Max Unit
th
– – –
IB
I
V
IR(pgm)
S+
t
(smpl)
V
V
bal
R
bal
R
DS(on)
H
S–
th
– 20 – nA
–
–
– 50 –
– 50 –
–
–
–
–
Ǔ
x 100
2.0
Vth to 7.5
V
Cell 1
1.0
100
1.0
/2.0
V
–
–
–
–
–
–
µA
V
Ω
s
V
∆%
Ω
Ω
2
MOTOROLA ANALOG IC DEVICE DATA
MC33347A
Á
Á
Á
ELECTRICAL CHARACTERISTICS (continued) (T
= 25°C unless otherwise noted.)
A
Characteristic UnitMaxTypMinSymbol
CURRENT SENSING
Charge Current Limit (Pin 10 to Pin 9, TA = 25°C)
Threshold Voltage V
Input Bias Current I
Delay I
th(chg)
IB(chg)
dly(chg)
– 18 – mV
– 200 – nA
– 3.0 – ms
Discharge Current Limit (Pin 4 to Pin 9, TA = 25°C)
Threshold Voltage V
Input Bias Current I
Delay I
th(dschg)
IB(dschg)
dly(dschg)
– 70 – mV
– 200 – nA
– 3.0 – ms
CHARGE PUMP
Output Voltage (Pin 15, RL ≥ 1010 Ω)
V
O
–
9.2
TOTAL DEVICE
Average Cell Current (TA = 25°C, Battery Pack Unloaded and without
Current Limit Fault)
ББББББББББББББББББ
Operating with Soft Short (V
Pin 4
– V
> 10mV) – 19 –
Pin 9
I
CC
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁ
Operating (VCC = 8.0 V) – 12.5 –
Sleepmode (VCC = 5.0 V) – 0.015 –
Minimum Operating Cell Voltage
V
CC
Programmed for Two Cell Operation
Cell 1 Voltage – 1.5 –
Cell 2 Voltage – 0 –
Programmed for One Cell Operation
Cell 1 Voltage – 1.5 –
NOTES: 1. Maximum package power dissipation limits must be observed.
2. Low duty cycle pulse techniques are used during test to maintain the junction temperature as close to ambient as possible.
3. Tested ambient temperature range for the MC33347A:
T
= –25°CT
low
4. Cell balancing is active when the percent change in voltage exceeds the typical limit specified. This parameter is measured by holding one cell at a
fixed voltage while the other is varied so that balancing is activated. It is defined by:
high
D%+
= +85°C
Variable Cell Voltage*Fixed Cell Voltage
ǒ
Fixed Cell Voltage
Ǔ
x 100
–
V
µA
V
MOTOROLA ANALOG IC DEVICE DATA
3
Loading...