lb1955 Sanyo Semiconductor Corporation, lb1955 Datasheet - Page 4

• Manufacturer Part Number: lb1955
• Description: Three-phase Brushless Motor Driver
• Manufacturer: Sanyo Semiconductor Corporation

Pin Functions
Recommended Special Magnetization Waveforms
Note: Note that the intersections between the special magnetization and general waveforms and the intersections between pairs of general waveforms must
Hall Input Order
Note: The Hall input order must be set up to be W
12, 17, 19
Pin No.
23, 24
25, 26
27, 28
20, 21
be set up to be 30° apart.
16
15
13
11
10
14
18
22
9
8
1
2
3
4
5
6
7
W
U
V
IN
IN
IN
WOUT
UOUT
VOUT
LCTR
V
GND
FGR
AGC
V
Hall input
1, U
1, V
1, W
LIM
Pin
VG
FC
VC
PG
FG
SH
NC
Rf
REF
CC
IN
IN
IN
2
2
2
U phase Hall element input
V phase Hall element input
W phase Hall element input
U phase output
V phase output
W phase output
Pin connected to the center points of the coils that are Y-connected to the U, V, and W outputs.
Power supply
Reference voltage output
GND
Output current detection
Closed loop control gain switching
Speed control loop frequency characteristics correction
Output current limit setting
Speed control
PG waveform output
FG waveform output (FGR shorted to GND)
PG/FG synthesized output (FGR shorted to PG)
PG waveform sample-and-hold circuit capacitor connection
Connection for the capacitor used by the AGC circuit, which holds the input gain at a fixed level.
No connection
V
U.
LB1955
Function
B
8/6
A < 7/6
D
C
B
10/6
D
No. 5452-4/7