LM621 National Semiconductor, LM621 Datasheet - Page 3

• Manufacturer Part Number: LM621
• Description: LM621 Brushless Motor Commutator
• Manufacturer: National Semiconductor

Electrical Characteristics
Note 1 Unless otherwise noted ambient temperature (T
Note 2 Unless otherwise noted V
Note 3 The clock period is typically T
Characteristics for determining values of R and C Note that the value of R should be no less than 11 k
Note 4 Tested limits are guaranteed and 100% production tested
Note 5 Design limits are guaranteed (but not 100% production tested) at the indicated temperature and supply voltages These limits are not used to calculate
outgoing quality levels
Note 6 Specifications in boldface apply over junction temperature range of
Note 7 Typical Thermal Resistances
Note 8 Package thermal resistance indicates the ability of the package to dissipate heat generated on the die Given ambient temperature and power dissipation
the thermal resistance parameter can be used to determine the approximate operating junction temperature Operating junction temperature directly effects
product performance and reliability
Note 9 This part specifically does not have thermal shutdown protection to avoid safety problems related to an unintentional restart due to thermal time constant
variations Care should be taken to prevent excessive power dissipation on the die
Note 10 Human body model 100 pF discharged through a 1500
Note 11 R
DEAD-TIME SECTION
High Level Input Voltage
High Level Input Current
Low Level Input Voltage
Low Level Input Current
Propagation Delays
(Inputs to Outputs)
Minimum Clock Period
T
Clock Accuracy
f
Minimum Dead-Time
Minimum Dead-Time
COMPLETE CIRCUIT
Total Current Drains
Undervoltage Lockout
CLK
e
DIRECTION
OUTPUT INHIBIT
DEAD-TIME ENABLE
DIRECTION
OUTPUT INHIBIT
DEAD-TIME ENABLE
DIRECTION
OUTPUT INHIBIT
DEAD-TIME ENABLE
DIRECTION
OUTPUT INHIBIT
DEAD-TIME ENABLE
OUTPUT INHIBIT
DIRECTION
I
I
I
I
V
CC1
CC1
CC2
CC2
CC1
100 kHz (Note 11)
N pkg board mounted
N pkg socketed
(Notes 3 11)
Parameter
1
e
0 for C
t
620 pF
CC1
e a
CLK
e
5 0V ‘‘recommended operating range V
Pin 3
Pin 17
V
Pin 3
Pin 3
V
V
V
Dead-Time Off
(Pin 3
R
C
R
C
Dead-Time Off
Dead-Time On
Outputs Off
V
118 C W
110 C W
(0 756
O
in
in
in
in
CC2
JA
e
e
e
e
e
e
e
e
(see Note 8)
Conditions
11 k
200 pF
30k R
420 pF
e
e
e
e
(See Notes) (Continued)
c
5V
0 6V
0 6V
0V
e
e
A
0V
0V
0V
)
10
40V
0V)
0V
e
b
1
3
R
25 C
) (R
e
1
e
1k
a
resistor
1k
1) C where T
b
40 C to
3
CC
CLK
Typ
200
200
1 8
g
3 6
15
15
2
3
a
e
3
is in
85 C
4 5V to 5 5V’’ V
s R is in k
Tested
Limits
b
b
b
100
200
2 0
2 0
2 0
0 6
0 6
0 3
3 0
60
10
22
and C no less than 200 pF
CC2
100
200
2
6
60
and C is pF Also see selection graph in Typical
e a
10 0V ambient temperature
Design
b
b
b
Limits
150
100
300
2 0
2 0
2 0
0 4
0 4
0 2
30
150
100
300
9
e
mA max
mA max
mA min
mA min
25 C
V max
V max
V max
Units
V min
V min
V min
V
T
A max
A max
A max
A max
A max
A max
ns
ns
ns
MAX
%
CLK
s