OM9369SF データシートの表示（PDF） - International Rectifier
部品番号
コンポーネント説明
メーカー
OM9369SF
International Rectifier
OM9369SF Datasheet PDF : 14 Pages
| |||
OM9369
Figure 3 represents the implementation of a typical
current-mode controller for torque control. The load
current is monitored via the controller’s internal sense
resistor. The current sense signal is filtered and fed
into the current sense amplifier where the absolute
value of ISH-ISL is multiplied by two and biased up by
2.5V. Besides the implementation of the cycle-by-
cycle current limit/overcurrent protection feature of the
OM9369 discussed in the preceding paragraph, the
output of the current sense amplifier is fed into the
error amplifier which is configured as a differential
amplifier. An error signal representing the difference
between the current command input and the value
of the amplified current sense signal is produced.
Then it is compared to a pulse width modulated
ramp and since torque is nearly proportional to the
average phase output current, the torque is controlled
via duty cycle control.
Fig 3: Implementation of a Current-Mode Controller
CURRENT_COMMAND
+15V
3.24k
1k
OFFSET
35.6k
10uF +
.1uF
1800pF
3.24k
.26uF
2k
FROM MOTOR HALL SENSORS
H3
H2
H1
43k
.1uF
10k
.1uF
4700pF
232
232
1
2 Vcc
3 EA1-
EA2+
4
EA1+
5
6 VREF
7 EA2-
8 EA2_OUT
EA1_OUT
9
10 PWM_IN
11 OSCILLATOR
I_SENSE
12
13 ISH
14 ISL
15 QUAD_SEL
TACH_OUT
16
BRAKE
17
18 OV_COAST
19 SOFT_START
GROUND
20
H3_HALL_INPUT
21
22 H2_HALL_INPUT
23 H1_HALL_INPUT
SPEED_IN
24
DIRECTION
25
26 CSH
CSL
43
V_MOTOR
42
PHASE_A_OUT
41
PHASE_A_OUT
40
SOURCE_A 39
SOURCE_A
38
V_MOTOR
37
PHASE_B_OUT
36
PHASE_B_OUT
35
SOURCE_B 34
SOURCE_B
33
V_MOTOR
32
PHASE_C_OUT
31
PHASE_C_OUT
SOURCE_C 30
29
SOURCE_C
28
MOTOR_RETURN 27
MOTOR_RETURN
V_MOTOR
C_BUS
+
C_FILT
MOTOR
H1
H2
H3
HALL SENSORS
www.irf.com
7
Share Link: