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LB1998 Datasheet

  • LB1998

  • Monolithic Digital IC

  • 91.74KB

  • Sanyo

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LB1998
Pin Descriptions
Pin number
19
Pin name
V
CC
2
Pin voltage
4V to 13.6V
Equivalent circuit
Pin function
Source side predrive voltage and
constant current control amplifier
voltage supply pin
Power supply pin for all circuits
except output transistors, source
predriver, and low current control
VCC1
17
V
CC
1
4V to 6V
amplifier
Reverse detector pin
Forward rotation: High
Reverse rotation: Low
1 Hall or 3 Hall element waveform
Schmitt comparator combined
9
RS
100碌A
10 k鈩?/div>
8
9
8
FG
A11196
output
U phase Hall element input and
reverse detector U phase Schmitt
comparator input pin
Logic High indicates U
IN
1 > U
IN
2.
V phase Hall element input and
reverse detector V phase Schmitt
comparator input pin
Logic High indicates V
IN
1 > V
IN
2.
W phase Hall element input and
reverse detector W phase Schmitt
comparator input pin
Logic High indicates W
IN
1 > W
IN
2.
15
16
U
IN
1
U
IN
2
11
13
200鈩?/div>
VCC1
25碌A
12
14
200鈩?/div>
16
13
14
V
IN
1
V
IN
2
1.2V to
V
CC
1鈥?V
15
25碌A
25碌A
A11197
11
12
W
IN
1
W
IN
2
VCC1
75碌A
10
Hall element lower side bias voltage
supply pin
10
V
H
30 k鈩?/div>
2 k鈩?/div>
A11198
VCC1
75 k鈩?/div>
6
50 k鈩?/div>
A11199
When this pin is at 0.7V or lower, or
when it is open, all circuits are
inactive. When driving motor, set
this pin to 2V or higher.
6
S/S
0V to W
CC
1
5
SIG GND
VCC1
GND pin for all circuits except
output
Control loop frequency compensa-
tor pin. Connecting a capacitor
between this pin and GND prevents
closed loop oscillation in current
limiting circuitry.
20 k鈩?/div>
5 k鈩?/div>
A11200
2 k鈩?/div>
24
FC
24
Continued on next page
No. 5979-7/9

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