Powerex VLA312-2425 Data Sheet
VLA312-2425
A
B
CN1 CN2
Parts No. B2P3-VH, JST B2P-VH, JST
Polarity (Pin 1) -VIN +V
O
Polarity (Pin 2) — -V
O
Polarity (Pin 3) +VIN —
CONNECTOR
TEST CIRCUIT DIAGRAM
BLOCK DIAGRAM
CN1
CN2
C
D
CURRENT
SENSING
CONTROL
POWER
MAIN
CONTROL
RECTIFIER
GATE
POWER
HIGH SIDE
DRIVE
A
LOAD
VLA312-2425
V
V
IN
V
O
+V
O
+
−V
O
+V
IN
−V
IN
FG
I
O
+ +
− −
LOW SIDE
DRIVE
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272
Isolated
DC-DC Converter
Description:
VLA312-2425 is an isolated DC-DC
converter designed for industrial equipment.
It is designed to convert a rectified line
voltage ranging from 475 to 850V DC into
24V DC. Total output power is 25W.
Features:
£ Input Voltage Range:
475V to 850V DC
£ Output: +24V, 1.05A
(Output Power: 25.2W)
£ Electrical Isolation Voltage
Between Input and Output:
2500 V
for 1 Minute
rms
£ Over-current Protection
Outline Drawing and Circuit Diagram
Dimensions Inches Millimeters
A 3.54 90.0
(Auto Resumption)
£ Over-voltage Protection
Application:
On-board pre-regulator for
industrial control equipment.
B 2.16 55.0
C 1.38 35.0
D 0.20 5.0
105/09
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272
OUTPUT CURRENT, IO, (mA)
EFFICIENCY, η, (%)
EFFICIENCY VS. OUTPUT CURRENT
CHARACTERISTICS
100
0 0.2 0.4 0.6 1.21.00.8
80
90
60
70
40
50
10
20
30
0
0.10
0.08
0.09
0.06
0.07
0.04
0.05
0.01
0.02
0.03
0
OUTPUT CURRENT, IO, (mA)
OUTPUT VOLTAGE, V
O
, (VOLTS)
OUTPUT VOLTAGE VS. OUTPUT CURRENT
CHARACTERISTICS
30
0 2.01.0 1.50.5 2.5
9
12
15
18
21
24
27
6
3
0
INPUT VOLTAGE, VIN, (VOLTS)
EFFICIENCY, η, (%)
EFFICIENCY VS. INPUT VOLTAGE
CHARACTERISTICS
400 500 600
800
700 900
IO = 1.05A
0 100 200 300 400 500600 800700 900 0 100 200 300 400 500 600 800700 900
RL = 22.9Ω
(I
O
= 1.05A)
RL = 22.9Ω
(I
O
= 1.05A)
INPUT VOLTAGE, V
IN
, (VOLTS)
OUTPUT VOLTAGE, V
O
, (VOLTS)
OUTPUT VOLTAGE VS. INPUT VOLTAGE
CHARACTERISTICS
INPUT VOLTAGE, VIN, (VOLTS)
INPUT CURRENT, I
IN
, (A)
INPUT CURRENT VS. INPUT VOLTAGE
CHARACTERISTICS
AMBIENT TEMPERATURE, (°C)
OUTPUT CURRENT DE-RATING, (%)
DE-RATING
CHARACTERISTICS
120
-10 100 8020 30 40 50 60 70
100
80
60
40
20
0
VIN = 680V
V
IN
= 600V
VIN = 680V
V
IN
= 600V
100
80
90
60
70
40
50
10
20
30
0
30
9
12
15
18
21
24
27
6
3
0
VLA312-2425
Isolated DC-DC Converter
Absolute Maximum Ratings, Ta = 25°C unless otherwise specied
Characteristics Symbol VLA312-2425 Units
Input Voltage V
IN
850 Volts
Output Current IO 1.05 A
Operating Temperature (No Condensation)*1 T
Storage Temperature (No Condensation) T
Input-Output Isolation Voltage (Sine Wave Voltage, 60Hz, 1 Minute) V
-10 ~ +55 °C
opr
-20 ~ +75 °C
stg
2500 V
ISO
rms
Electrical and Mechanical Characteristics, Ta = 25°C, VIN = 680V unless otherwise noted
Characteristics Symbol Test Conditions Min. Typ. Max. Units
Input Voltage VIN Recommended Range 475 680 850 Volts
Output Voltage 1 VO I
Input Regulation R
Load Regulation R
Ripple Voltage V
I
eg-I
I
eg-L
IO = 1.05A*2 — — 240 mV
P-P
Efficiency h I
*1 Please refer to de-rating characteristics.
*2 Not including spike noise.
= 0.1 ~ 1.05A 22.8 24.0 25.2 Volts
O
= 1.05A, VIN = 475 ~ 850V — — 100 mV
O
= 0.1 ~ 1.05A — — 150 mV
O
= 1.05A — 77 — %
O
2 05/09
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