Datasheet

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REV.: 0/2019 P-3
Reference Design
Specifi cations (measured @ Ta= 25°C, full load after warm up unless otherwise stated)
R-REF04-RIA12
Schematic
Description
CON1 is the input voltage connector
D3 will blow fuse F1 if a reverse voltage is applied
D1 supports the hold-up circuit if the input is short circuited
U1 together with Q1 and the corresponding surge blocker circuit clamps RIA12 surge over voltages
CON 7 allows the surge blocker circuit to be bridged. This is useful for lower input voltages where a surge blocking function is not needed and
allows the power dissipation in Q1 to be eliminated
CON4 is the external hold-up capacitor connector for longer hold-up times (refer to previous section)
CON5 is an opto-coupler isolated enable input. Enable signals can be referenced to -Vin or +Vin, or supplied from an independently powered
external circuit (refer to next section)
CON6 is a connector across the DC output used to power a cooling fan
R1 and R2 allow trimming of the output voltage of the converter if required
CON2 and CON3 are the connectors for the output voltage. They are paralleled for high output currents
L1, L2, FB1, FB2, FB3, FB4, FB9, C1, C3, C5, C6, C7, C8, C9 and C10 form the EN50121-3-2 EMC fi lter
Grey coloured parts are alternate parts
FB1
V DD
1
1
SD
2
2
TIMER
3
3
V SS
4
BASE
5
FB
6
OUT
7
GATE
8
U1
D3
D1
1
2
C1
GND GND
R6
R7
2
1
HTSK1
Q1
R4
D2
R3
1
2
C2
GND
C14
GND
C8
GND
2 1
4 3
L1
2 1
4 3
L2
C9
1
2
C3
1
2
C4 C11
FB2
FB3
FB4
FB5
FB6
FB7
FB8
FB10
FB11
2 1
4 3
L 4
2 1
4 3
L5
GND
IN
-IN
-VIN
V IN
+VIN
1
CTRL
2
CASE
3
-VIN
4
-VOUT
5
-SENSE
6
TRIM
7
+SENSE
8
+VOUT
9
M1A
Mech Pin
10
Mech Pin
11
Mech Pin
12
Mech Pin
13
M1B
CTRL
+VIN
1
Gate In
2
Gate Out
3
-VIN
4
-VOU
5
-SENSE
6
T
T
T
RIM
7
+SENSE
8
+VOU
9
M2 A
Mech Pin
10
Mech Pin
11
Mech Pin
12
Mech Pin
13
Mec
h
P
i
n
Mec
h
P
i
n
Mec
h
P
i
n
Mec
h
P
i
n
Mech
Mech
Pin
14
Pin
15
M2B
V IN
-VIN
CTRL
+VIN
1
-VIN
2
CTRL
3
+VOUT
4
-VOUT
5
TRIM
6
+
V
I
N
-
V
I
N
C
T
R
L
+
V
O
VO
V
U
T
-
V
O
U
T
T
RIM
M3
V IN
CTRL
-VIN
-VIN
3
CTRL
2
+VIN
1
-VOUT
4
-SENSE
5
TRIM
6
+SENSE
7
+VOUT
8
M4A
Mech Pin
9
Mech Pin
10
Mec
h
P
i
n
Mec
h
P
i
n
M4B
V IN
-VIN
CTRL
C15
R1 1
R1 2
GND
R8
R9
R10
GND
R1
R2
R5
C16
P1
C7 C10
C5 C6
-VOUT
-VOUT
-VOUT
+VOUT
+VOUT
+VOUT
+VOUT
CM
C
2
CMC 2
C
M
C
1
CMC
3
R13
R14
1
4
2 3
L3
1
2
4
3
U2
CTRL
-VIN
1
2
CON6
+VOUT
-VOUT
ENABLE
COO LINGFA N
ALTERNATEPAR TS
MECHANICAL PINS
1
2
CON1
1
2
CON2
1
2
CON3
1 2
CON4
GND
1
2
CON5
1 2
FB9A
3 4
FB9B
1-2 3-4
FH1
TRIM
TRIM
TRIM
TRIM
1
2
CON7
-VOUT
CMC1
CMC3
IN
-IN
CASE
CA SE
F1