50 Watt HE Single Series DC/DC Converters
Features
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High Power Density, 16.4 W/In
3
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Small Size 2.4" x 2.28" x 0.55"
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Industry Standard Pinout
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Excellent Thermal Performance
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Description
The 50 watt single HE series DC/DC converters provide
precisely regulated dc outputs. All outputs are fully isolated
from the inputs, allowing the output to be used with positive or
negative polarity and various grounding options. The HE
series meets the most rigorous requirements in an industry
standard case size for industrial process control and telecom
applications.
Standard features include remote sensing, output trim, and
remote on/off. Threaded-through holes are provided to allow
easy mounting or to add a heat sink for extended temperature
use.
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Selection Chart
Model
24S3.10HE
24S5.10HE
24S12.4HE
24S15.3HE
24S24.2HE
48S3.10HE
48S5.10HE
48S12.4HE
48S15.3HE
48S24.2HE
V in nom
VDC
24
24
24
24
24
48
48
48
48
48
I in
ADC
1.67
2.41
2.38
2.35
2.35
.83
1.20
1.19
1.18
1.18
V out
VDC
3.3
5
12
15
24
3.3
5
12
15
24
I out
ADC
10
10
4.16
3.33
2.08
10
10
4.16
3.33
2.08
with Metal Baseplate
High Efficiency
Volt-seconds Clamp and Fast
Over Voltage Clamp
Pulse-by-pulse Current Limiting, Short Circuit
Frequency Foldback, Dead Short Shutdown
Over-temperature Protection
Auto-softstart
Low Noise
Planar Magnetics
Constant Frequency for Normal Operation
More than 2:1 Input Voltage Range
Remote Sense
Remote ON/OFF
Super Energy Saving, 2 mA Input Idle Current
Output Trim with Very Low Temperature
Coefficient
Water Washable, Wide Humidity Applications
Shock & Vibration Damping
Low Cost
Undervoltage Lockout
Input Reverse Voltage Protection
5 Year Warranty
A
NOTES:
Efficiencies up to 88%.
Default ON/OFF logic is positive.
Add -N to the model number to order negative ON/OFF logic.
2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
1
3/2001
50 Watt HE Single Series DC/DC Converters
Unless otherwise stated, these specifications apply for ambient temperature T
A
=23 ±2°C, nominal input voltage, and rated full load. (1)
Input Parameters
Model
Voltage Range
Input Ripple Rejection (120Hz)
Undervoltage Lockout
Input Reverse Voltage Protection
Input Current No Load
100% Load
Inrush Current
Reflected Ripple, 12µH Source
Impedance (2)
Efficiency
Switching Frequency
Maximum Input Overvoltage*
100 ms Maximum
Recommended Fuse
Model
Voltage Range
Input Ripple Rejection (120Hz)
Undervoltage Lockout
Input Reverse Voltage Protection
Input Current No Load
100% Load
Inrush Current
Reflected Ripple, 12µH Source
Impedance (2)
Efficiency
Switching Frequency
Maximum Input Overvoltage*
100 ms Maximum
Recommended Fuse
TYP
TYP
MAX
TYP
TYP
TYP
MAX
84
87
12
.83
12
1.20
MIN
TYP
MAX
TYP
TYP
TYP
MAX
TYP
TYP
TYP
MAX
83
87
12
1.67
12
2.41
MIN
TYP
MAX
TYP
24S3.10HE
24S5.10HE
24S12.4HE
18
24
36
60
Yes
Yes
12
2.38
0.5
20
88
440
50
(3)
48S3.10HE
48S5.10HE
48S12.4HE
36
48
75
60
Yes
Yes
12
1.19
0.5
20
88
440
85
(3)
89
89
12
1.18
12
1.18
mA
A
A
2
S
mA P-P
%
kHz
VDC
AMPS
48S15.3HE
48S24.2HE
88
88
12
2.35
12
2.35
mA
A
A
2
S
mA P-P
%
kHz
VDC
AMPS
Units
VDC
dB
24S15.3HE
24S24.2HE
Units
VDC
dB
A
2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
2
3/2001
50 Watt HE Single Series DC/DC Converters
Unless otherwise stated, these specifications apply for ambient temperature T
A
=23 ±2°C, nominal input voltage, and rated full load. (1)
Output Parameters
Model
Output Voltage
Output Voltage
Setpoint Accuracy
Turn On Overshoot
Temperature Coefficient
Noise (8)
RMS Noise
Load Current (4)
Load Transient Overshoot (7)
Load Transient Recovery Time (6)
Load Regulation (5)
Min-Max Load
Line Regulation
Vin = Min-Max
Overvoltage Protection (OVP)
Threshhold
OVP Type - Non-latching
Open Loop Overvoltage Clamp
Output Current Limit
V out=90% of V out-nom
Output Short Circuit Protection
V out = 0.25 V
MAX
TYP
TYP
MAX
MAX
TYP
MIN
MAX
TYP
TYP
TYP
MAX
TYP
MAX
TYP
MAX
0.005
0.01
75
20
24S3.10HE
48S3.10HE
3.3
24S5.10HE
48S5.10HE
5
24S12.4HE
48S12.4HE
12
±1
0
0.003
0.005
75
20
150
60
5
100
2.5
100
0.02
0.2
0.01
0.1
120
135
150
60
250
100
24S15.3HE
48S15.3HE
15
24S24.2HE
48S24.2HE
24
Units
VDC
%
%
%/°C
mV P-P
mV RMS
% I out
rated
%
µSec
%
%
%
%
%
TYP
TYP
MAX
120
140
150
2.28
1.90
.400
.000
.400
.000
0.50
1
2
3
4
5
6
7
8
9
Mounting inserts
M3 x 0.5 though
4 places
0.080
Ø
1.400
1.000
0.700
0.400
0.000
0.040
Ø
Pin
1
2
3
4
5
6
7
8
9
A
Function
-INPUT
CASE
ON/OFF
+INPUT
-OUTPUT
-SENSE
TRIM
+SENSE
+OUTPUT
2.40
0.2 TYP
0.000
0.19
0.000
2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
1.900
2.09
0.55
3
3/2001
50 Watt HE Single Series DC/DC Converters
General Specifications
All Models
Remote ON/OFF Function
HIGH Logic Level
or Leave Pin Open
External Leakage Current
for Logic High
Input Diode Protection
Voltage
LOW Logic Level
or Tie ON/OFF Pin to -Input
Sinking Current for
Logic Low
Open Circuit Voltage (10)
Positive Logic
Negative Logic
Output Resistance
Idle Current
(Module is OFF)
Turn-on Time to 1% error
Positive Logic
Negative Logic
Output Voltage Remote Sensing
Maximum Voltage Drops
MAX
on Leads
Line Regulation Under
TYP
Remote Sensing
MAX
Load Regulation Under
TYP
Remote Sensing
MAX
Output Voltage Trim
MIN
Trim Range
MAX
Input Resistance
TYP
Open Circuit Voltage
TYP
Sense and Trim Limit
Maximum Output Voltage
TYP
Units
NOTES:
Refer to the CALEX Application Notes for the definition of terms,
measurement circuits, and other information.
(2) 33 µF capacitor connected to two “Input” pins. Then place
current sensor in series with 12 µH inductor between 33 µF and
source. The reflected ripple current is measured over 5 Hz to
20 MHz bandwidth.
(3) Refer to the CALEX Application Notes for information on fusing.
(4) Optimum performance is obtained when this power supply is
operated within the minimum to maximum load specifications.
No damage to module will occur, when the output is operated at
less than minimum load, but the output voltage may contain a
low frequency component that may exceed output noise
specifications.
(5) Load regulation is defined as the output voltage change when
changing load current from maximum to minimum.
(6) Load Transient Recovery Time is defined as the time for the
output to settle from a 50 to 75% step load change to a 1% error
band (rise time of step = 2µSec).
(7) Load Transient Overshoot is defined as the peak overshoot
during a transient as defined in the Note 6 above.
(8) Noise is measured per the CALEX Application Notes. Output
noise is measured with a 10µF tantalum capacitor in parallel with
a 0.1 µF ceramic capacitor connected across the output to CMN.
Measurement bandwidth is 0-20 MHz.
(9) When an external On/Off switch is used, such as open collector
switch, logic high requires the switch to be high-impedance.
Switch leakage currents greater than 10 uA may be sufficient to
trigger the ON/Off to the logic-low state.
(10) Most switches would be suitable for logic On/Off control, in case
there is a problem, you can make following estimations and then
leave some margins.
When open collector is used for logic high, “Open Circuit Voltage
at On/Off Pin”, “Output Resistance” and “External Leakage
Current Allowed for Logic High” are used to estimate the high
impedance requirement of open collector.
When switch is used for logic low, “Open Circuit Voltage at On/
Off Pin”, “Output Resistance” and “LOW Logic Level” are used
to estimate the low impedance requirement of switch.
(11) Specifications subject to change without notice.
(1)
MAX
MAX
MAX
MIN
MAX
TYP
TYP
TYP
TYP
TYP
3.0
10
50
1.0
500
2.3
1.5
3
2
VDC
µA
VDC
VDC
µA
VDC
VDC
k Ohm
mADC
20
mSec
HIGH - Module ON
LOW - Module OFF
HIGH - Module OFF
LOW - Module ON
0.5
0.02
0.1
0.05
0.2
-10
+10
10
2.5
110
VDC
%
%
% of
Vout
kohm
V
% of
Vout
Isolation
Input to Output Isolation*
10µA Leakage
V nom = 24 V
MAX
V nom = 48 V
MAX
Input to Output Resistance
TYP
Input to Output Capacitance TYP
Environmental
Calculated MTBF, Bellcore
Method 1, Case 1
Baseplate Operating
MIN
Temperature Range
MAX
Storage Temperature
Thermal Impedance
Thermal Shutdown
Baseplate Temperature
(Auto Restart)
General
Unit Weight
Case Dimension
Approvals (pending)
Chassis Mounting Kit
MIN
MAX
TYP
MIN
TYP
TYP
700
1500
10
2400
10
6
-40
100
-40
120
7
100
110
VDC
VDC
M ohm
pF
Hr
°C
°C
°C/W
°C
A
4/114
oz/g
2.4" x 2.28" x 0.55"
UL1950, CUL, EN60950 (TUV)
MS20
* Absolute Maximum Ratings. Caution: Stresses in excess of the Absolute
Maximum Ratings can cause permanent damage to the device (see Note 1).
2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
4
3/2001
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