L6258E 데이터 시트보기 (PDF) - STMicroelectronics
부품명
상세내역
제조사
L6258E Datasheet PDF : 20 Pages
| |||
L6258E
Figure 2. Current Control Loop Block Diagram
POWER AMPL.
VREF
I0
I1
I2
I3
PH
INPUT TRANSCONDUCTANCE
AMPL.
ERROR AMPL.
ia
+
DAC VDAC
-
VR
+
-
ic
Rc
Cc
ib
Gin=1/Ra
Tri_0
-
+
-
+
Tri_180
VSENSE
Gs=1/Rb
SENSE TRANSCONDUCTANCE
AMPL.
VS
OUTA
LOAD
RL
LL
VS
RS
OUTB
D97IN625
Input Logic (I0 - I1 - I2 - I3)
The current level in the motor winding is selected ac-
cording to this table:
I3
I2
I1
I0
Current level
% of IMAX
H
H
H
H
No Current
H
H
H
L
9.5
H
H
L
H
19.1
H
H
L
L
28.6
H
L
H
H
38.1
H
L
H
L
47.6
H
L
L
H
55.6
H
L
L
L
63.5
L
H
H
H
71.4
L
H
H
L
77.8
L
H
L
H
82.5
L
H
L
L
88.9
L
L
H
H
92.1
L
L
H
L
95.2
L
L
L
H
98.4
L
L
L
L
100
Phase Input ( PH )
The logic level applied to this input determines the direc-
tion of the current flowing in the winding of the motor.
High level on the phase input causes the motor cur-
rent flowing from OUT_A to OUT_B through the load.
Triangular Generator
This circuit generates the two triangular waves TRI_0
and TRI_180 internally used to generate the duty cy-
cle variation of the signals driving the output stage in
bridge configuration.
The frequency of the triangular wave defines the switch-
ing frequency of the output, and can be adjusted by
changing the capacitor connected at TR1_CAP pin :
Fref = C-K--
where : K = 1.5 x 10-5
8/20
Share Link: 