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LS7362 Arkusz danych(PDF) 3 Page - LSI Computer Systems

Numer części LS7362
Szczegółowy opis  BRUSHLESS DC MOTOR COMMUTATOR/CONTROLLER
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Strona internetowa  http://www.lsicsi.com
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MAXIMUM RATINGS:
PARAMETER
SYMBOL
VALUE
UNIT
Storage Temperature
TSTG
-65 to +150
°C
Operating Temperature
1. Plastic
TA
-25 to +70
°C
2. Ceramic
TA
-55 to +125
°C
Voltage (any pin to Vss)
VMAX
-30 to +.5
Volts
DC ELECTRICAL CHARACTERISTICS:
(All Voltages Referenced to VDD)
SYMBOL
MIN
TYP
MAX
UNIT
Supply Voltage
VSS
5
-
28
Volts
Supply Current
(Excluding Outputs)
IDD
-
4.5
6
mA
Input Specifications:
BRAKE, ENABLE, CS1, CS2
RIN
-
150
-
K
S1, S2, S3, FORWARD/REVERSE
Voltage (Logic "1")
VIH
VSS-1.5
-
VSS
Volts
(Logic "0")
VIL
0
-
VSS-4.0
Volts
OVERCURRENT SENSE (See Note)
Voltage (Logic "1")
VIH
(VSS/2)+.25
-
VSS
Volts
(Logic "0")
VIL
0
-
(VSS/2)-.25
Volts
Oscillator:
Frequency Range
Fosc
0
1/RC
100
kHz
External Resistor Range
Rosc
22
-
1000
k
NOTE: Theoretical switching point of the OVERCURRENT SENSE input is one half of the power supply determined by an internal bias
network in manufacturing. Tolerances cause the switching point to vary plus or minus .25 Volts. After manufacture, the switching point
remains fixed within 10 mV over time and temperature. The input switching sensivity is a maximum of 50mV. There is no hysteresis on
the OVERCURRENT SENSE input.
TABLE I
OUTPUT CURRENT LIMITING RESISTOR SELECTION TABLE
POWER
OUTPUT CURRENT
SUPPLY
(VOLTS)
20
15
10
7.5
5
2.5
mA
6
**
**
**
**
**
2.0
9
**
**
**
.94 1.6
3.2
12
.35 .53 .88 1.2 2.1
4.0
15
.54 .76 1.2 1.7 2.6
5.3 Resistance
18
*
1.0 1.6 2.1 3.2
6.5
(k
Ω)
21
*
*
1.9 2.5 3.8
7.7
24
*
*
2.2 2.9 4.4
9.0
28
*
*
*
3.5 5.3 10.3
*causes excessive power dissipation
**exceeds max current possible for this voltage
TABLE II
For Power Supply 5-28 Volts
R13 (K ohms)
Output Voltage
10
Vss -0.5
5.1
Vss -1.0
2.7
Vss -2.0
TABLE III
OUTPUT COMMUTATION SEQUENCE
THREE PHASE OPERATION
SEQUENCE SELECT
CS1 CS2
CS1 CS2
CS1 CS2 CS1 CS2
FORWARD/REVERSE=1
FORWARD/REVERSE=0
0
0
0
1
1
0
1
1
ELECTRICAL SEPARATION
(-60°-)
(-120°-)
(-240°-)
(-300°-)
OUTPUTS
DRIVERS
OUTPUTS
DRIVERS
SENSE INPUTS
S1 S2 S3
S1 S2 S3
S1 S2 S3
S1 S2 S3
ENABLED A
B
C
ENABLED
A
B
C
0 0 0
0 0 1
0 1 0
0 1 1
O1, O5
+
-
Off
O2, O4
-
+
Off
1 0 0
1 0 1
1 1 0
1 1 1
O3, O5
Off
-
+
O2, O6
Off
+
-
1 1 0
1 0 0
1 0 0
1 1 0
O3, O4
-
Off
+
O1, O6
+
Off
-
1 1 1
1 1 0
1 0 1
1 0 0
O2, O4
-
+
Off
O1, O5
+
-
Off
0 1 1
0 1 0
0 0 1
0 0 0
O2, O6
Off
+
-
O3, O5
Off
-
+
0 0 1
0 1 1
0 1 1
0 0 1
O1, O6
+
Off
-
O3, O4
-
Off
+
0 1 0
0 0 0
0 0 0
0 1 0
ALL DISABLED
ALL DISABLED
1 0 1
1 1 1
1 1 1
1 0 1
ALL DISABLED
ALL DISABLED
The OVERCURRENT input (BRAKE low) enables external output drivers in normal sequence when more negative than Vss/2 and disables
all external output drivers when more positive than Vss/2. The OVERCURRENT is sensed continuously, and sets a flip flop which is reset
by the rising edge of the ENABLE input or the sawtooth OSCILLATOR. (See description under OVERCURRENT SENSE.)
7362-110292-3


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