DG-IRMCK203 Datasheet, PDF (12/67 Pages) International Rectifier – Application Developer’s Guide

IRMCK203 Application Developer’s Guide
2200pF,50V
A
20.0K, 1%
DC+
1.00M, 1%
909K, 1%
90.9K, 1%
+5V
3+
TLV2374ID
1
2-
+
22uF,10V
0.1uF
A
DCBUS_FB
10
A
A/D, DC BUS VOLTAGE SENSING & RESOLVER I/F
+15V
A
2 ANALOG REF
50K
A
1000pF
10K
50K
+5V
5+
TLV2374ID
7
6-
10
A
2.5V_REF_BUF
I_V
48.7K, 1%
1.00K, 1%
47pF, 50V
1.00K, 1%
A
2.5V_REF_BUF
I_W
48.7K, 1%
1.00K, 1%
47pF, 50V
1.00K, 1%
A
+5V
5.11K, 1%
5+
7
6-
TLC2274
5.11K, 1%
48.7K, 1%
A
+5V
5.11K, 1%
10 +
9-
8
TLC2274
5.11K, 1%
48.7K, 1%
A
+5V
1
2
CD74HCT4066M
A
+
10uF,10V
A
1000pF
A
+5V
0.1uF
I_V
5+
7
6-
TLV2374ID
A
8
9
CD74HCT4066M
1000pF
A
+5V
10 +
9-
I_W
8
TLV2374ID
A
13 _A0
14 _A1
15 _A2
12 _A3
1 _A4
5 _A5
2 _A6
4 _A7
VDD ¹⁶
OUT ³
S0 ¹¹
S1 ¹⁰
S2 ⁹
E6
GND ⁸
VEE ⁷
CD74HCT4051M
1K
1K
100pF
A
+5V
+
22uF,10V
0.1uF
A
3+
1 2.5V_REF_BUF
2-
TLC2274
2.5V_REF_BUF
A
+5V
10
1 _{VREF +VCC} 8
2 _+IN
CLK ⁷
3 _-IN
DATA ⁶
4 _GND
CONV ⁵
ADS7818EB
A
+
22uF,10V
A
0.1uF
AD_CLK
AD_OUT
AD_CONVST
0
+5V
0.1uF
A
+
10uF,10V
To IRMCK203
MUX_S0
MUX_S1
A
MUX_S2
RESSAMPLE
Figure 4. Analog Interface Example
Analog Output
The diagnostic D/A interface provides four sources of diagnostic data and is intended for use with external RC filters
for oscilloscope display. The user can select one of four sets of data sources by setting the value of the DacSel
register in the D/AConverter write register group (see Section 4.2.14) as shown in Table 6.
DacSe
l
Selected Data Sources
Value
0 Flux
0 1 Rotor angle
2 Torque current
3 Closed loop status
0 DC bus voltage
1 1 Alpha voltage
2 Torque current reference
3 Motor speed
0 Q-axis command voltage
2 1 D-axis command voltage
2 Alpha current
3 Beta current
0 Flux magnitude
3 1 Current error at parking
2 Parking diagnostic flag
3 W-phase current
Table 6. Analog Output Data Source Selection
Each signal is encoded as a pulse-width modulated 8-bit value output at a frequency of 128 KHz. Therefore,
hardware filtering is required to require to extract the actual signal. The data values are updated on each sync pulse.
The values for each data source are scaled so that the valid range is represented as an 8-bit unsigned value. For
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