SI88240ED-IS Datasheet, PDF (13/48 Pages) Silicon Laboratories – QUAD DIGITAL ISOLATORS WITH DC-DC CONVERTER

Si88x4x
I_IN
+
V_{_IN}
I_DDP
I ^C2
10 µF ^DDA
Q1
FDT3612
T1
D1
R9
82
C7
68 pF
U2
UTB02205S
R8 ^SBRT5A50SA
27.4
C6
100 pF
I_DDB
ESW
VDDB
I_LOAD
+ C3
V_{_ 22 µF OUT}
R7 19.6 k
Q2
MMBT2222LT1
RSNS
R5
0.1
GNDP
VREG
C5
VSNS
COMP
R1
49.9 k
R3
100 k
R2
13.3 k
C8
10 µF
0.1 µF
VDDA
SS
GNDB
C4
1.5 nF
C1
R6
0.22 µF 18 k
SH_FC
GNDA
Figure 3. Measurement Circuit for Converter Efficiency and Regulation for Si884xx, Si886xx
+_{_} ^Isolated
Supply
Si8824x
VSW
VDDP/VDDA
VDDB
Forward
Channel
Input
Forward
Channel
Ouput
Reverse
Channel
Output
Reverse
Channel
Input
GNDA
GNDB
High Voltage Transient Generator
DC-DC Output
Powers B-side
Referenced to
Earth Ground
Reverse
Channel
Measured by
Forward
Channel in
Loopback
Oscilloscope
High Voltage
Differential
Probe
Figure 4. Common-Mode Transient Immunity Test Circuit
Preliminary Rev. 0.6
13