SMH4814 Datasheet, PDF (20/44 Pages) Summit Microelectronics, Inc. – Dual Feed Active-ORing Programmable Hot Swap Controller

APPLICATIONS INFORMATION (CONTINUED)
SMH4814
Preliminary Information
–48V Ret.
Pin
Detect
1
R_PD1
R₃
1M
R₂
Pin
Detect
0
R₁
R_PD0
1M
R_A
–48V A
–48V B
R_B
I²C
R_D
6.8kΩ
1/2W
R_PD
100kΩ
C_5C
0.1µF
PD1
UV
100K
OV
SMH4814
PUPA
PUPB
VSS
PD0
PUPC
PUPD
R_GA
R_SHS 10Ω
R_GB
10Ω
R_GHS
10Ω
R_T
100kΩ
Primary
V_IN+
V_IN-
R_S
1kΩ
V_OUT+
DC-to-DC
Converter A
V_OUT-
V_IN+
V_IN-
V_IN+
V_IN-
V_IN+
V_IN-
V_OUT+
DC-to-DC
Converter B
V_OUT-
V_OUT+
DC-to-DC
Converter C
V_OUT-
V_OUT+
DC-to-DC
Converter D
V_OUT-
Secondary
Figure 15A - Full Application Schematic with all isolation components shown. The value of RD can be
chosen to be a single 1/2W resistor as shown or a parallel combination of smaller 1/10W resistors as
shown in Figure 15B.
Summit Microelectronics, Inc
2080 2.0 07/21/05
20