LB1687M Ver la hoja de datos (PDF) - SANYO -> Panasonic
Número de pieza
componentes Descripción
Fabricante
LB1687M Datasheet PDF : 5 Pages
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LB1687M
Truth Table
Item
Source → sink
W phase → V phase
1
V phase → W phase
W phase → U phase
2
U phase → W phase
V phase → W phase
3
W phase → V phase
U phase → V phase
4
V phase → U phase
V phase → U phase
5
U phase → V phase
U phase → W phase
6
W phase → U phase
Input
U VW
HH L
HL L
L LH
LHL
HLH
L HH
Forward/
reverse control
L
H
L
H
L
H
L
H
L
H
L
H
Input :
High : Each phase input 1 is more than 0.2V higher than each
phase input 2.
Low : Each phase input 1 is more than 0.2V lower than each
phase input 2.
Forward/reverse control :
High : 2.0 to VCC2
Low : 0 to 0.3V
Pin Function
Pin
UIN1, UIN2
VIN1, VIN2
WIN, WIN2
UOUT
VOUT
WOUT
VCC1
VCC2
Pin No.
25, 26
23, 24
21, 22
4
5
6
3
8
Rf
7
CD
19
FC
27
VC
18
VCREF
13
GND
28
F/RC
20
FGin–, FGin+
FGOUT
CR
9, 10
11
12
Functions
U phase Hall element input pin ; 'H' of logic ; VIN1>VIN2
V phase Hall element input pin ; 'H' of logic ; VIN1>VIN2
W phase Hall element input pin ; 'H' of logic ; VIN1>VIN2
U phase output pin
V phase output pin
W phase output pin
Power supply pin for applying output
Power supply pin for applying voltage section other than output section ; this voltage must be
stabilized to be free from ripple, noise, etc.
Output current detect pin ; by connecting Rf across this pin and ground, output current is detected as
voltage. The result is used to control the overcurrent protection circuit.
Pin for fetching current (voltage) detected with Rf ; to take feed back for Rf, the control-output voltage
gain can be reduced ; when not using, ground.
Frequency characteristic correction pin
Speed-phase control pin
Control is of voltage-controlled type that controls output voltage.
Control reference voltage.
Ground except for output
The minimum output transistor potential is at Rf pin.
Foward/reverse control pin
By setting this pin to high (more than 2V) or low (less than 0.3V), truth value is changed to perform
forward and reverse rotation.
FG signal input pin
FG amplifier output pin
The voltage at this pin can be used to change the hall input gain. Connection of an external resistor
and capacitor makes it possible to detect the rotational speed of a motor and change the hall input-
output voltage gain in two steps.
No.3417–3/5
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