VLA312-2425
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272
CONNECTOR
A
CN1
Parts No.
B2P3-VH, JST
Polarity (Pin 1)
-VIN
Polarity (Pin 2)
—
Polarity (Pin 3)
+VIN
B
CN1
Isolated
DC-DC Converter
CN2
CN2
B2P-VH, JST
+VO
-VO
—
TEST CIRCUIT DIAGRAM
IO
+
C
VIN
+
VLA312-2425
−
A
VO
V
LOAD
−
D
BLOCK DIAGRAM
+VIN
+VO
+
RECTIFIER
−VO
CURRENT
SENSING
−VIN
GATE
POWER
HIGH SIDE
DRIVE
LOW SIDE
DRIVE
Outline Drawing and Circuit Diagram
Dimensions
A
B
C
D
05/09
Inches
3.54
2.16
1.38
0.20
Millimeters
90.0
55.0
35.0
5.0
CONTROL
POWER
MAIN
CONTROL
FG
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 Vrms for 1 Minute
£ Over-current Protection
(Auto Resumption)
£ Over-voltage Protection
Application:
On-board pre-regulator for
industrial control equipment.
1
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272
VLA312-2425
Isolated DC-DC Converter
Absolute Maximum Ratings, Ta = 25°C unless otherwise specified
Characteristics
Symbol
VLA312-2425
Units
Input Voltage
VIN
850
Volts
IO
1.05
A
Output Current
Operating Temperature (No
Condensation)*1
Topr
-10 ~ +55
°C
Storage Temperature (No Condensation)
Tstg
-20 ~ +75
°C
Input-Output Isolation Voltage (Sine Wave Voltage, 60Hz, 1 Minute)
VISO
2500
Vrms
Electrical and Mechanical Characteristics, Ta = 25°C, VIN = 680V unless otherwise noted
Characteristics
Symbol
Input Voltage
VIN
Test Conditions
Min.
Typ.
Max.
Units
Recommended Range
475
680
850
Volts
Output Voltage 1
VO
IO = 0.1 ~ 1.05A
22.8
24.0
25.2
Volts
Input Regulation
Reg-I
IO = 1.05A, VIN = 475 ~ 850V
—
—
100
mV
Load Regulation
Reg-L
IO = 0.1 ~ 1.05A
—
—
150
mV
Ripple Voltage
VP-P
IO = 1.05A*2
—
—
240
mV
h
IO = 1.05A
—
77
—
%
Efficiency
*1 Please refer to de-rating characteristics.
*2 Not including spike noise.
DE-RATING
CHARACTERISTICS
30
120
100
VIN = 680V
VIN = 600V
80
60
40
20
0
-10 0
10 20 30 40 50 60 70 80
18
15
12
9
60
50
40
30
6
20
3
10
0
0.5
1.0
1.5
2.0
0
2.5
0
0.2
0.4
0.6
0.8
1.0
OUTPUT CURRENT, IO, (mA)
OUTPUT CURRENT, IO, (mA)
EFFICIENCY VS. INPUT VOLTAGE
CHARACTERISTICS
OUTPUT VOLTAGE VS. INPUT VOLTAGE
CHARACTERISTICS
INPUT CURRENT VS. INPUT VOLTAGE
CHARACTERISTICS
OUTPUT VOLTAGE, VO, (VOLTS)
70
60
50
40
30
20
10
500
600
700
800
INPUT VOLTAGE, VIN, (VOLTS)
900
24
RL = 22.9Ω
(IO = 1.05A)
0.09
0.08
INPUT CURRENT, IIN, (A)
27
21
18
15
12
9
0.06
0.05
0.04
0.03
0.02
3
0.01
0 100 200 300 400 500 600 700 800 900
INPUT VOLTAGE, VIN, (VOLTS)
RL = 22.9Ω
(IO = 1.05A)
0.07
6
0
1.2
0.10
30
IO = 1.05A
0
400
70
AMBIENT TEMPERATURE, (°C)
80
EFFICIENCY, η, (%)
80
21
0
100
2
24
VIN = 680V
VIN = 600V
90
EFFICIENCY, η, (%)
100
OUTPUT VOLTAGE, VO, (VOLTS)
OUTPUT CURRENT DE-RATING, (%)
27
90
EFFICIENCY VS. OUTPUT CURRENT
CHARACTERISTICS
OUTPUT VOLTAGE VS. OUTPUT CURRENT
CHARACTERISTICS
0
0 100 200 300 400 500 600 700 800 900
INPUT VOLTAGE, VIN, (VOLTS)
05/09
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272
VLA312-2425
Isolated DC-DC Converter
Safety Precautions
Great detail and careful attention are given to the production of HVICs, such as in the development, the quality of production, and in its
reliability. However, the reliability of HVICs depends not only on their own factors but also in how they are used. When handling HVICs
please note the following cautions.
CAUTIONS
Packaging: The materials used in packaging HVICs can only withstand normal external conditions. When exposed to outside shocks,
rain, and certain environmental contamination, the packaging materials will deteriorate. Please take care in handling.
Carrying:
1.
2.
3.
4.
5.
Don't stack boxes too high. Avoid placing heavy materials on boxes.
Boxes must be positioned correctly during transportation to avoid breakage.
Don't throw or drop boxes.
Keep boxes dry. Avoid rain or snow.
Minimal vibration and shock during transportation is desirable.
Storage:
When storing HVICs, please observe the following notices or possible deterioration of their electrical characteristics,
risk of solderability, and external damage may occur.
1. Devices must be stored where fluctuation of temperature and humidity is minimal and must not be exposed to
direct sunlight. Store at the normal temperature of 5 to 30°C with humidity at 40 to 60%.
2. Avoid locations where corrosive gasses are generated or where a lot of dust accumulates.
3. Storage cases must be static proof.
4. Avoid putting weight on boxes.
Extended
Storage:
When extended storage is necessary, HVICs must be kept non-processed. When using HVICs which have been stored for
more than one year or under severe conditions, be sure to check that the exterior is free from flaws or other damage.
Maximum
Ratings:
To prevent any electrical damage, use HVICs within the maximum ratings. The temperature, current, voltage, etc., must
not exceed these conditions.
Polarity:
To prevent HVICs from destruction and deterioration due to wrong insertion, make sure polarity of inserting leads into
the board hole conforms to the external view for the terminal arrangement.
05/09
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