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L6235D Scheda tecnica(PDF) 18 Page - STMicroelectronics

Il numero della parte L6235D
Spiegazioni elettronici  DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR
PDF  25 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6235D Scheda tecnica(HTML) 18 Page - STMicroelectronics

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L6235
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APPLICATION INFORMATION
A typical application using L6235 is shown in Figure 21. Typical component values for the application are shown
in Table 3. A high quality ceramic capacitor (C2) in the range of 100nF to 200nF should be placed between the
power pins VSA and VSB and ground near the L6235 to improve the high frequency filtering on the power supply
and reduce high frequency transients generated by the switching. The capacitor (CEN) connected from the EN
input to ground sets the shut down time when an over current is detected (see Overcurrent Protection). The two
current sensing inputs (SENSEA and SENSEB) should be connected to the sensing resistor RSENSE with a trace
length as short as possible in the layout. The sense resistor should be non-inductive resistor to minimize the di/
dt transients across the resistor. To increase noise immunity, unused logic pins are best connected to 5V (High
Logic Level) or GND (Low Logic Level) (see pin description). It is recommended to keep Power Ground and
Signal Ground separated on PCB.
Table 3. Component Values for Typical Application.
Figure 21. Typical Application
C1
100µF
R1
5K6
Ω
C2
100nF
R2
1K8
Ω
C3
220nF
R3
4K7
Ω
CBOOT
220nF
R4
1M
Ω
COFF
1nF
RDD
1K
Ω
CPUL
10nF
REN
100K
Ω
CREF1
33nF
RP
100
Ω
CREF2
100nF
RSENSE
0.3
Ω
CEN
5.6nF
ROFF
33K
Ω
CP
10nF
RPUL
47K
Ω
D1
1N4148
RH1, RH2, RH3
10K
Ω
D2
1N4148
VREF
+
-
BRAKE
14
5
18
19
21
16
OUT1
H1
H2
H3
GND
RCOFF
OUT3
OUT2
VSA
POWER
GROUND
SIGNAL
GROUND
+5V
+
-
VS
8-52VDC
13
VSB
VCP
VBOOT
CP
CBOOT
RP
D2
D1
C1
C2
SENSEA
RSENSE
20
BRAKE
6
7
DIAG
EN
CEN
REN
ENABLE
2
FWD/REV
FWD/REV
11
TACHO
8
12
1
23
24
4
17
3
15
22
SENSEB
THREE-PHASE MOTOR
COFF
ROFF
RH1
RH2
RH3
10
CREF1
R2
R3
R1
RDD
R4
C3
CREF2
RCPULSE
9
CPUL
RPUL
D02IN1357
M
VREF
5V
HALL
SENSOR



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