High Density DC-DC Modules
PS50 Series
25 to 50 Watt Wide Input
DC-DC Converters
Single Output
Features
• 25W/50W Isolated Output
• Efficiency to 85%
• 300KHz Switching Frequency
• 2 : 1 Input Range
• Regulated Outputs
• Continuous Short Circuit Protection
• Five-Sided Metal Case
www.powersolve.co.uk
Only for Nominal Input Voltage 24 & 48 VDC
MODEL INPUT OUTPUT OUTPUT INPUT CURRENT %EFF
PS50-12S25 2.5 VDC 10 A 2740 mA 76
PS50-12S33 3.3 VDC 10 A 3525 mA 78
PS50-12S05 5 VDC 10 A 5145 mA 81
PS50-12S12 12 VDC 4.16 A 4950 mA 84
PS50-12S15 15 VDC 3.33 A 4950 mA 84
PS50-12S24 24 VDC 2.08 A 4950 mA 84
PS50-24S25 2.5 VDC 10 A 1353 mA 77
PS50-24S33 3.3 VDC 10 A 1740 mA 79
PS50-24S05
PS50-24S12 12 VDC 4.16 A 2450 mA 85
PS50-24S15 15 VDC 3.33 A 2450 mA 85
PS50-24S24
PS50-48S25 2.5 VDC 10 A 676 mA 77
PS50-48S33 3.3 VDC 10 A 870 mA 79
PS50-48S05 5 VDC 10 A 1250 mA 83
PS50-48S12 12 VDC 4.16 A 1220 mA 85
PS50-48S15 15 VDC 3.33 A 1220 mA 85
PS50-48S24
NOTE: 1. Nominal Input V
VOLTAGE VOLTAGE CURRENT NO LOAD FULL LOAD
9-18VDC
18-36VDC
36-75VDC
oltage 12, 24 & 48 VDC
VDC
5
VDC
24
VDC 2.08 A 1209 mA 86
24
10 A 2540 mA 82
A
2.08
50 mA
50 mA
50 mA
2419
mA
86
Powersolve Electronics Ltd. Units 8A, Arnhem Road, Newbury, RG14 5RU. England
Tel:01635 521858 Fax: 01635 523771 Email: sales@powersolve.co.uk
1
High Density DC-DC Modules
2.40
(61.00)
Ø0.08
(2.03)
2pl.
0.50
(12.70)
0.18 min.
(4.60 )
2*R1.50
Mounting Inserts
M3*0.5 Through 4pl.
2.00
(50.80)
1.40
(35.56)
0.60
(15.24)
4
3
2
1
5
6
7
8
9
1.90
(48.25)
2.28
(57.90)
Ø0.04
(1.02)
7pl.
A
ll Dimensions In Inches(mm)
-SENSE (6)
TRIM UP
TRIM (7)
TRIM DOWN
+SENSE (8)
-SENSE (6)
+SENSE (8)
TRIM (7)
10K ohms
TRIMPOT
HIGH SIGNAL HERE
DISABLE OUTPUT
ON/OFF (2)
-VIN (4)
Pin
Tolerances Inches .XX +.02 .XXX +.01 +0.02
M
illimeters .X+.5 .XX+.25 +0.5
Remote ON/OFF Control
BOTTOM VIEW
SIDE VIEW
0
.50
(12.70)
0.18 min.
(4.60 )
2
*R1.50
-SENSE (6)
TRIM UP
TRIM (7)
TRIM DOWN
+SENSE (8)
-SENSE (6)
+SENSE (8)
TRIM (7)
10K ohms
TRIMPOT
www.powersolve.co.uk
Electrical Specification
NPUT
I
nput Voltage Range 12V 9-18V
I
Undervoltage lockout 12Vin power up 8.8V
p
4Vin power up 17V
2
p
48Vin power up 34V
ositive Logic Remote ON/OFF
P
nput Filter Pi Type
I
UTPUT
O
3.4
power down 32.5V
Voltage Accuracy : +1% max.
Transient Response : 25% Step Load Change <500µsec.
xternal Trim Adj. Range +10%
E
ipple & Noise, 20MHz BW, 2.5V & 3.3V & 5V 20mV RMS., max. 75mV pk-pk, max.
R
ENVIRONMENTAL
emperature Coefficient +0.03%/°C
T
hort Circuit Protection Continuous
S
ine Regulation
L
Load Regulation
1
2
Over Voltage Protection trip Range, % Vo nom. 115-140%
Current Limit 110% ~150% Nominal Output
GENERAL
fficiency S
E
solation Voltage Input/Output 1
I
Output/Case 1500VDC min.
Isolation Resistance 107ohm min.
Switching Frequency 12/24Vin 400KHz, Typ.
Operating case Temperature -40°C to 100°C
Storage Temperature -55°C to +105°C
Thermal Shutdown, Case Temp. 100°C Typ.
Dimensions 2.28x2.40x0.50 inches
Case Material Aluminium
4V 18-36V
2
48V 36-75V
ower down 8V
ower down 16V
12V & 15V 30mV RMS., max. 100mV pk-pk, max.
24V 100mV RMS., max. 240mV pk-pk, max.
.2% max.
+0
+0.2% max.
ee Table
500VDC min.
Input/Case 1500VDC min.
48Vin 300KHz, Typ.
(57.9x61.0x12.7 mm)
NOTE:
1. Measured From High Line to Low Line. 2. Measured From Full Load to Zero Load. 3. Logic Compatibility - Open Collector Ref. to -Input,
Module ON - Open Circuit, Module OFF - < 0.8Vdc 4. Suffix "N" to the Model Number with Negative Logic Remote ON/OFF.
External Output Trim
Pin Connection
Pin Function
1 +Vin
2 ON/OFF
3 CASE
4
5 -Vout
6 -Sense
7
Powersolve Electronics Ltd. Units 8A, Arnhem Road, Newbury, RG14 5RU. England
Tel:01635 521858 Fax: 01635 523771 Email: sales@powersolve.co.uk
All Specifications Typical At Nominal Line, Full Load and 25°C Unless Otherwise Noted.
8
9 +Vout
-Vin
rim
T
+Sense
2
Power Dissipated vs Ambient Temperature and Air Flow
1
5
10
5
0
Ambient Temperature, Ta(Deg. C)
Power Disspated, Pd (Watts)
0
10 20
30
40 50
60
70 80 90
100
20
25
3
0
35
40
4
5
5
0
N
atural Convection
2
0 ft./min. (0.1 m/s)
1
00 ft./min. (0.5 m/s)
200 ft./min. (1.0 m/s)
300 ft./min. ( 1.5 m/s)
4
00 ft./min. (2.0 m/s)
500 ft./min. (2.5 m/s)
600 ft./min. (3.0 m/s)
700 ft./min. (3.5 m/s)
800 ft./min. (4.0 m/s)
Forced Convection Power Derating without Heat Sink
High Density DC-DC Modules
www.powersolve.co.uk
Application Note
Derating:
The operating case temperature range of the PS50 series is -40°C to +100°C. When operating the PS50 series,
proper derating or cooling is needed.
The following curve is the derating curve of a PS50 without heat sink.
Where:
The power dissipation (Pd):
Pd = Pi - Po = Po (1-n) /n
esistance are listed below:
mal r
The ther
Chart of Thermal Resistance vs Air Flow:
AIR FLOW RA
Natural Convection 20ft./min. (0.1m/s) 7.12 °C/W
100 ft./min. (0.5m/s) 6.21 °C/W
TE
200 ft./min. (1.0m/s) 5.17 °C/W
300 ft./min. (1.5m/s) 4.29 °C/W
400 ft./min. (2.0m/s) 3.64 °C/W
500 ft./min. (2.5m/s)
600 ft./min. (3.0m/s) 2.53 °C/W
700 ft./min. (3.5m/s) 2.37 °C/W
800 ft./min. (4.0m/s)
The temperature rise ( T ):
T = Pd * Rca
Powersolve Electronics Ltd. Units 8A, Arnhem Road, Newbury, RG14 5RU. England
TYPICAL Rca
C/W
°
2.96
°C/W
2.19
3
Tel:01635 521858 Fax: 01635 523771 Email: sales@powersolve.co.uk
HIGH SIGNAL HERE
DISABLE OUTPUT
O
N/OFF (2)
-VIN (4)
Negative
Logic Table
External Output
Output Noise Test Circuit schematic
Logic Positive Logic
Logic Low -
Switch Closed
Logic High -
Switch Open
Module on
Module off
Module off
Module on
+SENSE (8)
-SENSE (6)
-SENSE (6)
+SENSE (8)
TRIM (7)
TRIM (7)
TRIM UP
TRIM DOWN
10K ohms
TRIMPOT
+Vout (9)
-Vout (5)
Ceramic
1.0µF
Solid Tantalum
10µF
To
Scope
Resistor
Load
L
ogic State
(
Pin 2)
High Density DC-DC Modules
www.powersolve.co.uk
Remote ON/OFF Control
The PS50 series allows the user to switch the module on and off electronically with remote on/off feature. The PS50
series are available with "positive logic" or "negative logic" (option).
External Output Trimming
Output may optionally be externally trimmed (+10%) with a fixed resistor or an external trimpot as shown.
Output Noise
The output noise is measur
ed with 10
µF tantalum capacitor and 1.0µF ceramic capacitor acr
oss output.
All Specifications T
ypical At Nominal Line, Full Load and 25
C Unless Other
°
wise Noted.
Powersolve Electronics Ltd. Units 8A, Arnhem Road, Newbury, RG14 5RU. England
Tel:01635 521858 Fax: 01635 523771 Email: sales@powersolve.co.uk
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