User Manual
29
<Revision 1.0>
EVAL-M3-TS6-665PN User Manual
iMOTION™ Modular Application Design Kit
Hardware description of EVAL-M3-TS6-665PN
5.2.5
Auxiliary power supply
Figure 27 depicts the schematic of the auxiliary power supply for the Eval-M3-TS6-665PN board. The circuit
includes a LNK306 that is used to generate 15 V directly from the DC bus. V
CC
is connected to the gate drivers.
Figure 27
Power supply section of the Eval-M3-TS6-665PN evaluation board
The linear voltage regulator IFX1117ME V33 generates 3.3 V from 15 V power supply V
CC
. The 3.3 V power supply
is used in the PFC overcurrent comparator circuit and overtemperature hardware protection circuit. Both V
CC
and 3.3 V are also present on the 30 pins iMOTION™ MADK-M3 interface connector J3 to power circuitry on the
control board.
C27
104
L2
1.5MH
D11
US1J
D12
US1J
R61
2k
R60
2k
C26
22u 25V
C29
470u 25V
R59
15.8k
+B
C28
223 630V
15V
FB
2
BP
1
D
4
S
5
S
6
S
7
S
8
U3
LNK306
Note:
R59 = 15.8K VCC=15V
R59 = 11.6K VCC=12V
R59 = 10.88K VCC=11.1V
C31
1u 25V
C30
10u 16V
R62
300
R63
300
R64
300
15V
3.3V
3.3V
Vin
3
GN
D
1
Vout
2
U4
IFX1117
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