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5
VOLTAGE SENSE
D
C
CURRENT SENSE
B
A
5
Figure A-6. OVER VOLTAGE/CURRENT DETECTORS & BACK-EMF/PHASE-CURRENT INPUT SELECTORS
4
R 2 1
R 2 2
16K
R 2 3
V_S_DCB
A N 0
16K
C 1 3
+ 5 .0V
0.1uF
3
+
+5.0V
2
-
R 2 5
10K
R 2 6
R 2 8
R 2 7
16K
I_S_DCB
A N 1
16K
C 1 4
+5.0V
0.1uF
5
+
+ 5 .0V
6
-
R 3 0
10K
J G 4
BK_EMF_A
1
A N 2
2
U 3 _ P H A _IS
3
BK_EMF_B
4
A N 3
5
U 3 _ P H B _IS
6
BK_EMF_C
7
A N 4
8
U 3 _ P H C _ I S
9
BACK-EMF/PHASE-CURRENT SENSE
ANALOG INPUT SELECTOR
4
3
1M
+3.3V
R 2 4
5.1K
U 6 A
UNI-3 OVER-VOLTAGE
1
FAULT DETECTION
LM393
J G 3
OVER_VOLTAGE
1
O V E R _ C U R R E N T
3
1M
+ 3 .3V
R 2 9
5.1K
UNI-3 OVER-CURRENT
U 6 B
FAULT DETECTION
7
LM393
Title
OVER VOLTAGE/CURRENT DETECTORS & BACK-EMF/PHASE-CURRENT INPUT SELECTORS
Document
DSP56F801EVM.DSN
Size
Number
B
Date:
Saturday, October 28, 2000
3
2
1
F A U LT0
2
DSP Standard Products Division
2100 East Elliot Road
Tempe, Arizona 85284
(480) 413-5090
FAX: (480) 413-2510
Designer:
Sheet
DSPD Design
2
1
D
C
B
A
Rev.
1.0
of
6
11
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