Isolated
DC/DC Converter
VLA106-24242
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272
www.pwrx.com
17/12 Rev. 1
Description:
VLA106-24242 is a DC-DC
converter. Its output power is
2.4W and the input is isolated
from the output. The over-current
protection circuit is built-in. This
device is used for on-board power
supplies in industrial control
equipment.
Features:
£ Input Voltage Range:
21.6 to 26.4V DC
£ Output: +24V, 100mA
(Output Power: 2.4W)
£ Thin Profile, Lightweight Design
£ Electrical Isolation Voltage
Between Input and Output:
2500 Vrms for 1 Minute
£ Built in Over-current Protection
Circuit
Application:
On-board power supplies such as
industrial equipment and control
equipment.
Outline Drawing and Circuit Diagram
Dimensions Inches Millimeters
A 1.3 33.0
B 0.945 24.0
C 0.71 18.0
D 1.0 25.4
E 0.22 5.5
F 0.53 13.5
G 0.18 4.5
H 0.10 2.54
J 0.18±0.06 4.5±1.5
K 0.02+0.004/-0.002 0.5+0.1/-0.05
L 0.01+0.01/-0.002 0.25+0.2/-0.05
Note: All dimensions listed are maximums except D.
A
B
+VIN
–VIN
8
9
10
+VO1
+VO2
3.3kΩ
VZ =
8.2V
-VO
XXXX
24242
FILTER FILTER
DRIVE
CIRCUIT
CONSTANT
VOLTAGE
CIRCUIT
OVER-CURRENT
PROTECTION
OPTOCOUPLER
11
3
1
2
111
D
J
G
HK
L
G
F
C
E
9
10
IO
VIN
C1
C1 : 100µF 50V (low impedance)
C2 : 47µF 50V (low impedance)
C2 +
2
+VLA106-24242 LOAD
3 A
V
V
8
11 1
Test Circuit Diagram
VLA106-24242
Isolated DC/DC Converter
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272 www.pwrx.com
7/12 Rev. 12
Absolute Maximum Ratings, Ta = 25°C unless otherwise specied
Characteristics Symbol VLA106-24242 Units
Input Voltage (Between Pins 8, 9, and 10, 11) VIN 27 Volts
Output Current (Between Pins 3 and 1) IO 100 mA
Operating Temperature (No Condensation)* T
opr -20 ~ 70 °C
Storage Temperature (No Condensation) Tstg -20 to 85 °C
Input-Output Isolation Voltage (AC, 1 Minute) VISO 2500 Vrms
*Please refer to derating characteristics.
Electrical and Mechanical Characteristics, Ta = 25°C, VIN = 24V unless otherwise specied
Characteristics Symbol Test Conditions Min. Typ. Max. Units
Input Voltage VIN Recommended Range 21.6 24.0 26.4 Volts
Output Voltage 1 VO1 Between Pins 3 and 1, IO = 0 ~ 100mA 22.8 24.0 25.2 Volts
Output Voltage 2 VO2 Between Pins 2 and 1, 7.79 8.2 8.61 Volts
Between Pins 3 and 2 : No Load
Input Regulation Reg-I Between Pins 3 and 1, — — 50 mV
IO = 100mA, VIN = 21.6 ~ 26.4V
Load Regulation Reg-L Between Pins 3 and 1, IO = 0 ~ 100mA — — 50 mV
Ripple Voltage VP-P Between Pins 3 and 1, IO = 100mA — — 150 mV
Efficiency h Between Pins 3 and 1, IO = 100mA — 72 — %
OUTPUT CURRENT, IO, (mA)
EFFICIENCY, h, (%)
EFFICIENCY VS. OUTPUT CURRENT
CHARACTERISTICS
100
0306090 180150120
80
60
40
20
0
OUTPUT CURRENT, IO, (mA)
OUTPUT VOLTAGE, VO, (VOLTS)
OUTPUT VOLTAGE VS. OUTPUT CURRENT
CHARACTERISTICS
32
08040 6020 180120160140100
12
16
20
24
28
8
4
0
INPUT VOLTAGE, VIN, (VOLTS)
EFFICIENCY, h, (%)
EFFICIENCY VS. INPUT VOLTAGE
CHARACTERISTICS
20 21 22 2423 25 26 27
100
80
60
40
20
0
VIN = 24V
Ta = 25°C
VIN = 24V
Ta = 25°C
Io = 100mA
Ta = 25°C
0510 15 20 25 30 0510 15 2520 30
32
16
20
24
28
12
8
4
0
Io = 100mA
Ta = 25°C
INPUT VOLTAGE, VIN, (VOLTS)
OUTPUT VOLTAGE, V
O
, (VOLTS)
OUTPUT VOLTAGE VS. INPUT VOLTAGE
CHARACTERISTICS
INPUT VOLTAGE, VIN, (VOLTS)
INPUT CURRENT, IIN, (mA)
INPUT CURRENT VS. INPUT VOLTAGE
CHARACTERISTICS
500
400
300
200
100
0
Io = 100mA
Ta = 25°C
AMBIENT TEMPERATURE, (°C)
OUTPUT CURRENT, IO, (mA)
DERATING
CHARACTERISTICS
140
-10 3010 11050 7090
120
100
80
60
40
20
0
