LB1838M Просмотр технического описания (PDF) - SANYO -> Panasonic
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LB1838M Datasheet PDF : 5 Pages
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Block Diagram
LB1838M
VCC
VS2
VS1
IN1 60kΩ
80kΩ
ENA1
60kΩ
80kΩ
Thermal
shutdown
10µF
Stepping
OUT1 Motor
OUT2
IN2 60kΩ
80kΩ
ENA2
GND
60kΩ
80kΩ
Vcont
OUT3
OUT4
GND
Note: As long as the voltages applied to VCC, VS1, VS2, ENA1, ENA2, IN1, and IN2 are within the limits set by the
absolute maximum ratings, there are no restrictions on the relationship of each voltage level in comparison with the
others (regarding which is higher or lower). (ex. VCC = 3V, VS1, 2 = 2V, ENA = IN = 5V)
Truth Table
IN1,2 ENA1,2
L
H
H
H
L
L
H
L
OUT1,3
H
L
OFF
OFF
OUT2,4
L
H
OFF
OFF
Mode
Forward
Reverse
Standby
Standby
Vcont pin
VCC
IN
VZ
Vcont
VS
OUT
M
ID OUT
ID =
VZ
r
( = Constant)
As shown in the left diagram, the Vcont pin outputs the voltage
of the band gap Zener VZ +VF (= 1.93V).
In normal use, this pin is left open.
The drive current ID is varied by the Vcont voltage. However,
because the band gap Zener is shared, it functions as a bridge.
No.3949-3/5
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