SCM-1104MF Datasheet, PDF (3/11 Pages) Allegro MicroSystems – High Voltage 3-Phase Motor Driver

SCM1104MF
High Voltage 3-Phase Motor Driver
Typical Application Diagram
VFO
RFO
CN
SCM1100M
8
7
31
Vcc
CBOOT
VB
6
VCC
UV
HO
5
Input
HIN _Logic
Detect _Drive
Level ^Circuit
3
LIN
&
Shift
HS
32
Shoot
Through
Prevention
4
COM
UV
Detect
Drive LO
1
FO
O.C. ^Circuit
33
Protect
LS
2
CFO
HVIC1
16
15
CBOOT
14
13
11
12
9
VCC
Input
HIN _Logic
LIN
&
Shoot
Through
Prevention
COM
FO
10
CFO
24
23
CBOOT
22
21
19
20
17
VCC
Input
HIN _Logic
LIN
&
Shoot
Through
Prevention
COM
FO
18
CFO
VB
UV
Detect
Level
Shift
HO
Drive
Circuit
HS
UV
Detect
O.C.
Protect
Drive LO
Circuit
LS
HVIC2
VB
UV
Detect
Level
Shift
HO
Drive
Circuit
HS
UV
Detect
O.C.
Protect
Drive LO
Circuit
LS
HVIC3
28
29
M
30
VBB
25
26
27
CS
RS
CFO
NOTE:
▪ To use the OCP circuit, an external shunt resistor, RS, is needed. The RS value can be obtained from the formula:
R_S(Ω) = 0.5 (V) / Overcurrent Detection Set Current (A) – 0.0024 (Ω).
▪ To avoid malfunction, the wiring between the LS and COM pins should be as short as possible.
▪ To prevent surge destruction, put a 0.01 to 1 μF snubber capacitor, CS, in parallel with the electrolytic capacitor.
▪ To prevent surge destruction, put a 18 to 20 V Zener diode between the VCC and COM pins.
▪ To prevent surge malfunction, put a 0.01 to 1 μF ceramic capacitor between the VCC and COM pins and the VB and HS pins.
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com