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LM393ADR Datenblatt(PDF) 10 Page - Infineon Technologies AG

Teilenummer LM393ADR
Bauteilbeschribung  iMOTION™ Modular Application Design Kit
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Hersteller  INFINEON [Infineon Technologies AG]
Direct Link  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

LM393ADR Datenblatt(HTML) 10 Page - Infineon Technologies AG

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Application Note
10
<Revision 1.0>
<2017-05-22>
Eval-M1-CM610N3
iMOTION™ Modular Application Design Kit
Schematics and Layout
5
Schematics and Layout
To meet individual customer requirements and make the Eval-M1-CM610N3 evaluation board a basis for
development or modification, all necessary technical data like schematics, layout and components are
included in this chapter.
5.1
DC-Link Voltage Measurement
Pin 14 of connector J2 provides access to the DC-link voltage. Three possible feedback cases are associated
with this pin. Figure 4 provides the DC bus sense resistor details. By default, the resistor R42 is not mounted on
Eval-M1-CM610N3. There must be a pull-down resistor mounted on the corresponding controller board.
Figure 4
DC bus sense resistor on Eval-M1-CM610N3 evaluation board
If a pull down resistor of 4.87 kΩ referred to ground is inserted either on the Eval-M1-CM610N3 evaluation board
or on the control board, the DCBSENSE voltage results in the range of 0 to 3.3 V on the pin reflecting a DC bus
voltage range of 0 to 400 V.
If a pull down resistor of 4.87 kΩ is inserted on both, Eval-M1-CM610N3 evaluation board and on the control
card, the DCBSENSE results scale to 0-1.65 V. No safety issue occurs. If no feedback is desired on the DCBSENSE
pin, R35 or R36 should be removed to avoid high voltage on the connector.
5.2
EMI filter and soft power up circuit
Figure 5 depicts the schematic from the AC line input connector J1 to the rectified DC bus voltage. This circuitry
includes a passive EMI filter consisting of elements CX1, CX2, L1, CY1 and CY2, a 25 A/600 V rectifier block U2, a
fuse F1 for inrush current protection, a NTC resistor RT1 and a relay RLY1 for soft powering up and reducing
conduction losses in steady state. Two electrolytic capacitors E1 and E2 are used for buffering the rectified DC
bus voltage DCP.
Figure 5
Schematic for EMI filter and AC/DC section of the Eval-M1-CM610N3 evaluation board
DCBSENSE
R36
1.00M
R35
1.00M
DCP
R42
4.87K(DNI)
CX1
3
1
2
4
RLY1
Q1
R1
1M,1/2W
L1
2
3
U2
GBJ2506
R2
91R
R3
3.3k
D1
CX2
CY2
CY1
C3
10μF
C2
4.7μF
RT1
NEUTRAL
LINE
EARTH
VCC
1
2
3
J1
CON3
+
E1
DCP
C1
+
E2
F1
8A, 250VAC


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