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LB1995 Datasheet

  • LB1995

  • Monolithic Digital IC

  • Sanyo

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LB1995
Continued from preceding page
Pin number
Pin name
Pin voltage
Equivalent circuit
VCC1
Pin function
21
V
CREF
2V to 3V
22
200鈩?/div>
25碌A(chǔ)
10 k鈩?/div>
25碌A(chǔ)
200鈩?/div>
21
Control reference voltage supply
pin. Determines control start
voltage.
Speed control voltage supply pin
V type control technique
30 k鈩?/div>
15 k鈩?/div>
30 k鈩?/div>
100碌A(chǔ)
100碌A(chǔ)
22
V
C
0V to V
CC
1
A11132
V
C
> V
CREF
: Forward
V
C
< V
CREF
: Slowdown
(Reverse-blocking circuit
prevents reverse rotation.)
23
24
1
2
W
OUT
PWR GND
W phase output
VCC2
5
3.9鈩?/div>
23 1
3.9鈩?/div>
2
V
OUT
U
OUT
Output transistor GND
V phase output
U phase output
Upper side output PNP transistor
collector pin (common for all 3
phases). For current detection,
connect resistor between V
CC
3
pin and RF pin. Constant current
control and current limiter works
by detecting this voltage.
V type control/single-side control
switching pin
CC:
High 鈥?gt; Single-side control
Low/Open 鈥?gt; V type control
5
RF
24
A11133
VCC1
75 k鈩?/div>
19
19
CC
8 k鈩?/div>
8 k鈩?/div>
50 k鈩?/div>
A11134
VCC1
100碌A(chǔ)
75 k鈩?/div>
Short brake pin
BRAKE:
High 鈥?gt; Short brake operation
Low/Open 鈥?gt; Motor drive operation
16
BRAKE
50 k鈩?/div>
16
A11135
No. 5976-8/9

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