LB1981 Sanyo, LB1981 Datasheet - Page 4

• Manufacturer Part Number: LB1981
• Description: Three-Phase Brushless Motor Driver
• Manufacturer: Sanyo

Pin Descriptions
Pin number
10
3
4
5
6
7
8
9
SEL CSLP
Pin name
CLSP1
CLSP2
STBY
V
V
FRC
V
CC
CC
S
2
1
2.7V to 10V
0V to V
Pin voltage
2.7V to 6V
V
–0.2V min
V
–0.2V min
V
–0.2V min
CC
CC
CC
1 max
1 max
1 max
CC
2
8 A
5
4
3
50k
50k
100k
LB1981V
100k
4 A
Equivalent circuit
100k
100k
1k
9 10
20 A
V CC 1
V CC 1
V CC 1
A10858
A10859
20 A
V CC 1
A10860
A10861
When this pin is at 0.7V or
less or when it is open, only
the FG/PG amplifier operates.
In the motor drive state, the
pin should be at 2V or higher.
CSLP pin charge/discharge
current switching pin.
Setting this pin to 2V or higher
switches the triangular wave
slope that determines soft
switching.
Motor forward/reverse
switching pin.
Low: reverse
(–0.2V to +0.7V or open)
High: forward
(2V to V
Power supply pin for
determining output amplitude
by supplying motor voltage.
Must be lower than V
voltage.
Power supply pin for supplying
source side predriver voltage
and coil waveform detect
comparator voltage.
Power supply pin for circuits
except motor voltage, source
side predriver voltage, and coil
waveform detect comparator
voltage.
Pins for connecting triangular
wave oscillator capacitor. This
triangular wave coil output
performs waveform soft
switching.
CC
Continued on next page
Pin function
1)
No. 5917-4/9
CC
2