Datasheet

LTC4225-1/LTC4225-2
19
422512f
applicaTions inForMaTion
Figure 9. An Application with the Hot Swap MOSFET on the Supply Side and the Ideal Diode MOSFET on the Load Side
CPO1
ON1
V
IN1
12V
PWREN1
V
IN2
12V
ON2
INTV
CC
GND
C1
0.1µF
C
CP1
0.1µF
C
CP2
0.1µF
C
T2
47nF
C
HG1
15nF
BULK
SUPPLY
BYPASS
CAPACITOR
BULK
SUPPLY
BYPASS
CAPACITOR
C
T1
47nF
12V
5A
PLUG-IN
CARD 1
PLUG-IN
CARD 2
BACKPLANE
422512 F09
IN1 SENSE1 HGATE1
M
D1
SiR466DP
M
H1
SiR466DP
LTC4225
R
S1
0.006Ω
M
H2
SiR466DP
M
D2
SiR466DP
Z
H1
, Z
D1
, Z
H2
, Z
D2
: CMHZ4706
R
S2
0.006Ω
DGATE1 OUT1
CPO2 IN2 SENSE2 HGATE2 DGATE2 OUT2
FAULT1
PWRGD1
EN1
TMR1
TMR2
EN2
PWRGD2
FAULT2
R
H1
10Ω
Z
H1
Z
D1
R
HG1
47Ω
C
HG2
15nF
R
H2
10Ω
R
HG2
47Ω
12V
5A
C
L1
1000µF
PWREN2
+
C
L2
1000µF
+
Z
H2
Z
D2
Figure 10. Plug-In Card Supply Holdup Using Ideal Diode at 12V and 3.3V Input Supplies
CPO1
ON1
EN1
R2
137k
R4
28k
V
IN2
3.3V
ON2
EN2
INTV
CC
GND
C1
0.1µF
C
F1
0.1µF
C
F2
0.1µF
C
CP1
0.1µF
Z1
SMAJ13A
C
CP2
0.1µF
C
T2
0.1µF
C
HG1
15nF
C
L1
1000µF
12V
10A
C
T1
22nF
BACKPLANE
CONNECTOR
CARD
CONNECTOR
422512 F10
IN1 SENSE1 DGATE1
M
D1
SiR158DP
M
H1
SiR158DP
LTC4225
R
S1
0.003Ω
M
D2
SiR468DP
M
H2
SiR468DP
R
S2
0.015Ω
HGATE1 OUT1
CPO2 IN2 SENSE2 DGATE2 HGATE2 OUT2
FAULT1
PWRGD1
TMR1
TMR2
PWRGD2
FAULT2
R
H1
10Ω
R
HG1
47Ω
R5
2.7k
D2 D1
R6
2.7k
V
IN1
R1
20k
R3
20k
Z2
SMAJ13A
V
IN1
12V
R7
2.7k
D1 D2
R8
2.7k
V
IN2
+
C
L2
100µF
3.3V
2A
D1: GREEN LED LN1351C
D2: RED LED LN1261CAL
+