Datasheet

LT3748
26
3748fb
For more information www.linear.com/LT3748
Figure 16. Automotive IGBT Controller Supply
EN/UVLO
TC
SS
R
FB
R
REF
V
C
GND INTV
CC
LT3748
3748 F16
133k
2nF
V
IN
12V TYP
V
IN
V
O1
V
O2
V
O3
V
O4
T1
1:1:1:1:1
D1
15V
300mA
825k
150k
10
µF
6
µH
C1
GATE
SENSE
1µF
4700pF
4.7µF
6.04k
71.5k
0.0125Ω
M1
10k
IGBT
DRIVER
D2
15V
300mA
C2
IGBT
DRIVER
D3
15V
300mA
C3
IGBT
DRIVER
D4
15V
300mA
C1-C4: 22µH 25V X7R ×2
D1-D4: DIODES INC. PDS3100
M1: VISHAY Si7898DP
T1: COILTRONICS VERSA-PAC VP4-0075-R
Z1: DIODES INC. DFLZ18-7
C4
Z1
Z1
Z1
49.9k
TL431ACD
ANODE
CATHODE
REF
320V
0V
3-PHASE
MOTOR
IGBT
DRIVER
9.09k
typical applications
LOAD CURRENT (mA)
0
OUTPUT VOLTAGE (V)
17.0
16.5
16.0
15.5
15.0
14.5
14.0
LT3748 F17
800400200 600
V
O4
(NO LOAD)
V
O3
(100mA)
V
O1
(300mA)
V
O2
(SWEPT)
Figure 17. Cross Regulation Performance of the Supply in Figure 16 with V
O1
and V
O3
Loaded with V
O2
Swept
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