®
®
INNOVATION and EXCELLENCE
Single Output
UCP Models
UL/EN Approved, "Half-Brick"
50-60 Watt, DC/DC Converters
Features
s
s
Standard "half-brick" configuration
UL1950 and EN60950 safety
approvals (BASIC insulation)
mark for "D48" models
(36-75V inputs)
Fully isolated, 1500Vdc guaranteed
Output voltages: 3.3, 5, 12 or 15 Volts
Input voltage ranges: 18-36V, 36-75V
Full 50/60 Watt output power
Reliable SMT-on-pcb construction
Input under and overvoltage shutdown
Output current limiting and
short-circuit protection
On/off, V
OUT
trim and sense functions
Modifications and customs for OEM’s
s
s
s
s
s
s
s
s
s
s
The high efficiency, low noise and long-term reliability that defines DATEL
DC/DC Converters now comes to you in the standard "half-brick" configuration (2.3"
x 2.4" x 0.5"). All models in our new UCP Series meet UL1950 and EN60950 safety
requirements, including each European country’s deviations. A CB Test Certificate/
Report is available. All models have BASIC insulation; guarantee 1500Vdc isolation;
and because they are designed with Class B thermal insulation, satisfy all safety
requirements over their full operating temperatures.
UCP Models are designed for demanding telecom, datacom and networking
applications. Their "semi-synchronous-rectifier" design (400kHz switching) achieves
impressive efficiencies (up to 88%). Output voltages are 3.3, 5, 12 or 15 Volts. Input
voltage ranges are 18-36V ("D24" models) or 36-75V ("D48" models). All "D48"
models meet the Low Voltage Directive (LVD) and carry the CE mark.
For high reliability and affordability, DATEL utilizes high-speed automatic
assembly to construct the UCP’s proven SMT-on-pcb designs. All models have been
rigorously qualified (including a 500-hour life test) and EMC characterized. Devices
are housed in metal cases (with non-conductive baseplates) that incorporate
threaded inserts for add-on heat sinks and/or pcb mounting.
UCP’s feature input pi filters, input undervoltage and overvoltage lockout, output
current limiting, short-circuit protection, and thermal shutdown. Additionally, all
devices have output trim capability and an on/off control pin that can be ordered
with either polarity or replaced with a sync function. We can easily modify standard-
product UCP’s to meet your application-specific requirements.
+V
IN
SWITCH
CONTROL
10Ω
+SENSE
+V
OUT
–V
OUT
10Ω
–SENSE
–V
IN
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
TRIM
ON/OFF
CONTROL
UVLO & OVLO
COMPARATORS
The On/Off Control function can be ordered with either positive (standard) or negative polarity.
It can also be replaced with an optional Sync function.
12V- and 15V-output models have a standard forward architecture in which this FET is replaced
with a Schottky diode.
Figure 1. Simplified Schematic
DATEL, Inc., Mansfield, MA 02048 (USA)
•
Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356
•
Email: sales@datel.com
•
Internet: www.datel.com
XCP Series
5 0 - 6 0 W, S I N G L E O U T P U T D C / D C C O N V E R T E R S
Performance Specifications and Ordering Guide
Output
Model
UCP-3.3/15-D24
UCP-3.3/15-D48
UCP-5/12-D24
UCP-5/12-D48
UCP-12/5-D24
UCP-12/5-D48
UCP-15/4-D24
UCP-15/4-D48
Input
Regulation (Max.)
Line
Load
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
V
OUT
(Volts)
3.3
3.3
5
5
12
12
15
15
I
OUT
(Amps)
15
15
12
12
5
5
4
4
R/N (mVp-p)
Typ.
Max.
75
75
75
75
75
75
100
100
150
150
120
120
120
120
150
150
V
IN
Nom.
(Volts)
24
48
24
48
24
48
24
48
Range
(Volts)
18-36
36-75
18-36
36-75
18-36
36-75
18-36
36-75
I
IN
(mA)
75/2515
75/1258
75/2924
75/1462
50/2924
50/1420
50/2841
50/1420
Efficiency
Min.
Typ.
81%
81%
85%
84%
84%
86%
86%
86%
83%
83%
87%
86%
86%
88%
88%
88%
Package
(Case,
Pinout)
C12, P17
C12, P17
C12, P17
C12, P17
C12, P17
C12, P17
C12, P17
C12, P17
Typical at T
A
= +25°C under nominal line voltage and full-load conditions unless otherwise noted.
Ripple/Noise (R/N) measured over a 20MHz bandwidth. All models are specified with external 33µF, low-ESR,
input capacitors and 10µF tantalum in parallel with 1µF ceramic output capacitors.
10% to 100% load.
Contact DATEL Applications Engineering for availability of other input voltage ranges such as 9-18V (12V nominal).
Nominal line voltage, no-load/full-load conditions.
PART NUMBER STRUCTURE
U CP
-
5
/
12
-
D48 N
Output Configuration:
U
= Unipolar
Standard Half-Brick Package
Nominal Output Voltage:
3.3, 5, 12 or 15 Volts
Add "N" or "S" suffix as desired
Input Voltage Range:
D24
= 18-36 Volts (24V nominal)
D48
= 36-75 Volts (48V nominal)
Part Number Suffixes
Standard UCP Model DC/DC Converters are supplied with a positive
polarity on their on/off control function (pin 3 open = on). To order
devices with a negative polarity on pin 3 (open = off), add an "N"
suffix to the part number. To replace the on/off function with a sync
function, add an "S" suffix. See Technical Notes for more details.
Maximum Output Current
in Amps
M E C H A N I C A L S P E C I F I C AT I O N S
Optional Heat Sink
(Part Number HS-CP)
2.30
(58.42)
METAL CASE
0.515
(13.08)
I/O Connections
Pin
1
2
3
4
5
6
7
8
9
Function P17
–Input
Case
On/Off Control
+Input
+Output
+Sense
Trim
–Sense
–Output
2.30
(58.42)
1.900
(48.26)
0.20
(5.08)
Case C12
INSULATED BASE
PIN DIAMETERS:
PINS 1-4, 6-8 0.040 ±0.002 (1.016 ±0.051)
PINS 5, 9
0.080 ±0.002 (2.032 ±0.051)
0.20 MIN.
(5.08)
0.20
(5.08)
1.900
(48.26)
0.20
(5.08)
2.000
(50.80)
2.40
(60.96)
1
9
2
2.000
(50.80)
3
8
7
6
0.400
(10.16)
0.700
(17.78)
1.000
(25.40)
1.400
(35.56)
2.40
(60.96)
0.120 DIA. (3.048)
(4 PLACES)
TOP VIEW
0.20
(5.08
4
(4) THREADED INSERTS
#M3 THD THRU
5
0.50
(12.70)
MATERIAL: BLACK ANODIZED ALUMINUM
4 MOUNTING SCREWS AND 0.009 (0.229)
THERMAL PAD INCLUDED
0.50
(12.70)
BOTTOM VIEW
0.10
(2.54)
2
5 0 - 6 0 W, S I N G L E O U T P U T D C / D C C O N V E R T E R S
UCP Models
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
Input
Input Voltage Range:
"D24" Models
"D48" Models
Overvoltage Shutdown:
"D24" Models
"D48" Models
Start-Up Threshold:
"D24" Models
"D48" Models
Undervoltage Shutdown:
"D24" Models
"D48" Models
Input Current:
Normal Operating Conditions
Standby Mode (Off, OV, UV)
Input Filter Type
Reverse-Polarity Protection:
"D24" Models
"D48" Models
On/Off Control
(Pin 3)
V
OUT
Accuracy
(50% load):
3.3V Outputs
5/12/15V Outputs
Temperature Coefficient
Ripple/Noise
(20MHz BW)
Line/Load Regulation
Efficiency
Isolation Voltage:
Input-to-Output
Input-to-Case
Output-to-Case
Isolation Capacitance
Isolation Resistance
Current Limiting:
3.3V and 5V Outputs
12V and 15V Outputs
Overvoltage Protection
Transient Response
(50% load step)
Start-Up Time:
V
IN
to V
OUT
On/Off to V
OUT
Switching Frequency
Operating Temperature
(Ambient):
Without Derating
With Derating
Case Temperature:
Maximum Allowable
For Thermal Shutdown
Storage Temperature
Dimensions
18-36 Volts (24V nominal)
36-75 Volts (48V nominal)
40 Volts
80 Volts
17 Volts
35 Volts
16 Volts
34 Volts
See Ordering Guide
5mA
Pi
Brief duration, 15A maximum
Brief duration, 10A maximum
TTL high (or open) = on, low = off
Shielding
Case Connection
Case Material
Pin Material
Weight
Physical
2.3 x 2.4 x 0.515" (58.4 x 61 x 13.1mm)
5-sided
Pin 2
Zinc with a non-conductive, epoxy-based
black enamel finish and plastic baseplate
Brass, solder coated
5.3 ounces (149 grams)
These power converters require a minimum 10% output loading to maintain specified
regulation. Operation under no-load conditions will not damage these devices; however they
may not meet all listed specifications.
All models are specified with external 33µF, low-ESR, input capacitors and 10µF tantalum
in parallel with 1µF ceramic output capacitors.
Contact DATEL Applications Engineering for availability of other input voltage ranges
such as 9-18V (12V nominal).
See Technical Notes for details.
Devices may be ordered with the opposite polarity (pin 3 open = off), or the on/off control
function can be replaced with a sync function. See Part Number Suffixes and Technical
Notes for additional information.
Accracy is specified with the sense pins tied directly to their respective output pins.
Output noise may be further reduced with the installation of additional external output
capacitors. See Technical Notes.
Output
±1.5%, maximum
±1%, maximum
±0.04% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1500Vdc, minimum
1500Vdc, minimum
1500Vdc, minimum
750pF
100MΩ
Hiccup technique, auto-recovery
Power-limiting technique, auto-recovery
Zener/transorb clamp, magnetic feedback
Absolute Maximum Ratings
Input Voltage:
Continuous:
"D24" Models
"D48" Models
Transient (100msec):
"D24" Models
"D48" Models
Input Reverse-Polarity Protection
"D24/D48" Models
Output Overvoltage Protection
3.3V Outputs
5V Outputs
12V Outputs
15V Outputs
Output Current
44 Volts
88 Volts
50 Volts
100 Volts
Current must be <15/10 Amps. Brief
duration only. Fusing recommended.
4.5 Volts, limited duration
6.8 Volts, limited duration
15 Volts, limited duration
18 Volts, limited duration
Current limited. 12/15V devices can
withstand an output short circuit for a
brief duration only. 3.3/5V devices can
withstand output shorts indefinitely.
–40 to +105°C
+300°C
Dynamic Characteristics
200µsec max. to ±1.5% of final value
50msec
30msec
400kHz (±25kHz)
Storage Temperature
Lead Temperature
(soldering, 10 sec.)
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the
Performance/Functional Specifications Table is not implied.
Environmental
–40 to +45/50°C (Model dependent)
to +100°C (See Derating Curves)
+100°C
+95°C minimum, +105°C maximum
–40 to +105°C
3
XCP Series
5 0 - 6 0 W, S I N G L E O U T P U T D C / D C C O N V E R T E R S
Temperature Derating and Electrical Performance Curves
D24 Models (60 Watts)
60
60
D48 Models (60 Watts)
50
50
Output Power (Watts)
40
Output Power (Watts)
40
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
300 Linear Feet Per Minute
10
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
300 Linear Feet Per Minute
10
0
–40
0
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0
–40
0
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
Ambient Temperature (°C)
Ambient Temperature (°C)
Figure 2a. Temperature Derating Without Heat Sink
Figure 3a. Temperature Derating Without Heat Sink
60
60
50
50
Output Power (Watts)
40
Output Power (Watts)
40
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
300 Linear Feet Per Minute
10
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
300 Linear Feet Per Minute
10
0
–40
0
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0
–40
0
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
Ambient Temperature (°C)
Ambient Temperature (°C)
Figure 2b. Temperature Derating With HS-CP Heat Sink
Figure 3b. Temperature Derating With HS-CP Heat Sink
4
5 0 - 6 0 W, S I N G L E O U T P U T D C / D C C O N V E R T E R S
UCP Models
TECHNICAL NOTES
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "floating."
Designers will usually use the –Output (pin 9) as the ground/return of the
load circuit. You can, however, use the +Output (pin 5) as ground/return to
effectively reverse the output polarity.
Filtering and Noise Reduction
All UCP DC/DC Converters achieve their rated ripple and noise specifications
using the external input and output capacitors specified in the Performance/
Functional Specifications table. In critical applications, input/output noise
may be further reduced by installing additional external I/O caps. Input
capacitors should be selected for bulk capacitance, low ESR and high rms-
ripple-current ratings. Output capacitors should be selected for low ESR and
appropriate frequency response. All caps should have appropriate voltage
ratings and be mounted as close to the converters as possible.
The most effective combination of external I/O capacitors will be a function of
your particular load and layout conditions. Our Applications Engineers will be
happy to recommend potential solutions and can discuss the possibility of
our modifying a given device’s internal filtering to meet your specific
requirements. Contact our Applications Engineering Group for additional
details.
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. Fuses should also be
used if the possibility of sustained, non-current-limited, input-voltage polarity
reversals exists. For DATEL UCP DC/DC Converters, you should use slow-
blow type fuses with values no greater than the following.
V
IN
Range
"D24" Models
"D48" Models
Fuse Value
6 Amps
3 Amps
On/Off Control (Standard)
The On/Off Control pin (pin 3) may be used for remote on/off operation.
As shown in Figure 4, the control pin is referenced to the –Input (pin 1) and
has an internal pull-up resistor (75kΩ and 100kΩ respectively for "D24" and
"D48" models) to the +Input (pin 4). The standard UCP converter is designed
so that it is enabled when the control pin is left open and disabled when the
control pin is pulled low (to less than +0.8V relative to –Input). When left
open, pin 3 is pulled up to approximately 5V on "D24" models and 8V on
"D48" models.
Dynamic control of the on/off function is best accomplished with a mechani-
cal relay or an open-collector/open-drain drive circuit (optically isolated if
appropriate). The drive circuit should obviously be able to sink approximately
1mA when activated and withstand more than 10 Volts when deactivated.
Applying an external voltage to pin 3 when no input power is applied to
the converter can cause permanent damage to the converter. The on/off
control function, however, is designed such that the converter can be
disabled (pin 3 pulled low) while input power is ramping up and then
"released" once the input has stabilized. Under these circumstances, it takes
approximately 30ms for the output of the fully loaded DC/DC to ramp up and
settle to within rated accuracy.
For UCP converters configured with the negative-polarity option on the On/
Off Control pin ("N" suffix added to part number), operation is exactly
opposite to that described above.
Synchronization (Optional)
In critical applications employing multiple switching DC/DC converters, it may
be desirable to intentionally synchronize the switching of selected converters
(so the system noise can be reduced with notch filtering) or to purposely
desynchronize the converters (to lessen the current-carrying requirements on
intermediate dc buses). UCP DC/DC Converters have been designed so that
the On/Off Control function on pin 3 can be replaced with a Sync function (add
"S" suffix to part number). This change has to be implemented by DATEL
during the product assembly process. Contact our Applications Engineering
Group for additional details.
To synchronize the switching of multiple UCP converters configured with the
Sync function, an external clock can be applied to pin 3 of each converter.
The clock should be a square wave referenced to –Input (logic high = +3.5 to
+5 Volts, 800µA max.; logic low = 0 to +1 Volt, 800µA max.) with a maximum
1µsec "high" duration. The frequency of the synchronizing clock should be
higher than that of any individual converter. Therefore, it should be approxi-
mately 430kHz.
Output Trimming
V
OUT
may be trimmed ±5% via a single trimpot or fixed resistor. As shown in
Figure 5, the trimpot should be connected between +Output (pin 5) and
–Output (pin 9) with its wiper connected to Trim (pin 7). A trimpot can also be
used to determine the value of a single fixed resistor which can be connected
between pin 7 (Trim) and pin 5 (+Output) to trim "down" the output voltage, or
between pins 7 (Trim) and 9 (–Output) to trim "up" the output voltage, as
shown in Figure 6. Fixed resistors should be metal-film types with absolute
TCR's less than 100ppm/°C to ensure stability.
Start-Up Threshold and Undervoltage Shutdown
Under normal start-up conditions, devices will not begin to regulate until the
ramping-up input voltage exceeds the Start-Up Threshold Voltage (35V for
"D48" models). Once operating, devices will not turn off until the input voltage
drops below the Undervoltage Shutdown/Lockout limit (34V for "D48"
models). Subsequent re-start will not occur until the input is brought back up
to the Start-Up Threshold. This built-in hysteresis obviously avoids any
unstable on/off situations at a single voltage.
Start-Up Time
The V
IN
to V
OUT
start-up time is the interval between the time at which a
ramping input voltage crosses the turn-on threshold point and the fully-
loaded output voltage enters and remains within its specified accuracy band.
Actual measured times will vary with input source impedance, external input
capacitance, and the slew rate and final value of the input voltage as it
appears to the converter.
The On/Off to V
OUT
start-up time assumes the converter has its nominal input
voltage applied but is turned off via the On/Off Control. The specification
defines the interval between the time at which the converter is turned on and
the fully loaded output voltage enters and remains within its specified
accuracy band.
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