PRELIMINARY
®
®
A SUBSIDIARY OF C&D TECHNOLOGIES
Single Output
UVQ Models
Typical unit
Low-Profile, Isolated Quarter-Brick
2.5-40 Amp DC/DC Converters
For efficient, fully isolated DC power in the smallest space, DATEL’s UVQ series
quarter bricks offer output voltages from 1.2 to 48 Volts with currents up to 40 Amps.
UVQ’s operate over a wide temperature range (up to +70°C at 200 lfm airflow) at
full-rated power. The optional mounting baseplate extends this to all practical tem-
perature ranges at full power.
UVQ’s achieve these impressive specifications while delivering excellent electri-
cal performance. Overall noise is 35mVp-p (3.3V models) with fast step response
(200µsec). These converters offer high stability even with no load and tight output
regulation of ±0.125%. The unit is fully protected against input over and undervolt-
age, output overcurrent and short circuit. An on-board temperature sensor shuts
down the converter if thermal limits are reached. Protection may use either the
“hiccup” (auto restart) method or latching (manual restart) termination.
A convenient remote On/Off control input operates by external digital logic, relay
or transistor input. To compensate for longer wiring and to retain output voltage
accuracy at the load, UVQ’s include a Sense input to dynamically correct for ohmic
losses. A trim input may be connected to a user’s adjustment potentiometer or trim
resistors for output voltage calibration closer than the standard ±1% accuracy.
UVQ’s include industry-standard safety certifications and BASIC I/O insulation
provides 2250 Volt input/output isolation. Radiation emission testing is performed
to widely-accepted EMC standards. Contact DATEL for details on HALT qualifica-
tion testing. The UVQ’s may be considered as higher performance replacements for
some DATEL USQ models.
+SENSE
(7)
Features
■
■
■
■
■
Standard quarter-brick package/pinout
Outputs from 1.2 to 48V up to 125W
Low profile 0.42" height
24 and 48Vdc nominal inputs
Fully isolated, 2250Vdc (BASIC)
insulation
Designed for RoHS compliance
Output overvoltage and short-circuit
protected
On/Off control, trim and sense functions
Interleaved synchronous rectification
yields high efficiency to 94%
Fully protected against temperature
and voltage limits
UL/IEC/EN60950 safety approvals
Qual/HALT/EMI tested
■
■
■
■
■
■
■
+V
IN
(3)
+V
OUT
(8)
SWITCH
CONTROL
–V
OUT
(4)
–V
IN
(1)
–SENSE
(5)
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
V
OUT
TRIM
(6)
REMOTE
ON/OFF
CONTROL*
(2)
INPUT UNDERVOLTAGE, INPUT
OVERVOLTAGE, AND OUTPUT
OVERVOLTAGE COMPARATORS
* Can be ordered with positive (standard) or negative (optional) polarity.
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
UVQ Series
Performance Specifications and Ordering Guide
➀
Output
Model Number
UVQ-1.2/40-D48
UVQ-1.5/40-D48
UVQ-1.8/40-D48
UVQ-2.5/35-D24
UVQ-2.5/40-D48
UVQ-3.3/35-D24
UVQ-3.3/35-D48
UVQ-5/25-D24
UVQ-5/25-D48
UVQ-12/8-D24
UVQ-12/10-D48
UVQ-15/7-D24
UVQ-15/7-D48
UVQ-18/5.6-D24
UVQ-18/6-D48
UVQ-24/4.5-D24
UVQ-24/4.5-D48
UVQ-48/2.5-D48
V
OUT
(Volts)
1.2
1.5
1.8
2.5
2.5
3.3
3.3
5
5
12
12
15
15
18
18
24
24
48
I
OUT
(Amps)
40
40
40
35
40
35
35
25
25
8
10
7
7
5.6
6
4.5
4.5
2.5
R/N (mVp-p)
Typ.
TBD
TBD
TBD
TBD
35
TBD
35
TBD
35
TBD
120
125
120
33
125
125
120
100
Max.
TBD
TBD
TBD
TBD
55
TBD
55
TBD
55
100
TBD
TBD
TBD
TBD
185
TBD
TBD
125
Regulation (Max.)
Line
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.25%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
Load
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.2%
2 . 5 - 4 0 A M P I S O L AT E D D C / D C C O N V E R T E R S
Input
V
IN
Nom.
(Volts)
48
48
48
24
48
24
48
24
48
24
48
24
48
24
48
24
48
48
Range
(Volts)
36-75
36-75
36-75
18-36
36-75
18-36
36-75
18-36
36-75
18-36
36-75
18-36
36-75
18-36
36-75
18-36
36-75
36-75
I
IN
, No load
(mA)
TBD
TBD
TBD
TBD
30
TBD
30
TBD
30
120
45
45
45
45
45
45
45
30
I
IN
, Full load
(Amps)
TBD
TBD
TBD
TBD
1.72
TBD
2.24
TBD
3.36
4.44
2.69
4.7
2.33
4.84
2.42
4.79
2.39
2.66
Efficiency
Min.
TBD
TBD
TBD
TBD
89.5%
TBD
90.5%
TBD
91.5%
89%
91%
91%
92%
92%
92%
93%
93%
91.5%
Typ.
TBD
TBD
TBD
TBD
91%
TBD
92%
TBD
93%
90%
93%
93%
94%
93%
93%
94%
94%
94%
Case/
Pinout
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
C59,P32
(1) All models less than 12V output are tested and specified with 200 lfm
airflow, external 1 and 10µF parallel ceramic/tantalum output capacitors
and no external input capacitors. These capacitors are necessary to
accommodate our test equipment and may not be required to achieve
specified performance in your applications. All models are stable and
regulate within spec under no-load conditions.
Specifications are +25°C, V
IN
= nominal, V
OUT
= nominal, full load. For
units with 12V or greater output, an external 33µF low ESR input capaci-
tor is added.
(2) Input Ripple Current is tested and specified over a 5-20 MHz bandwidth.
Input filtering is C
IN
= 33µF tantalum, C
BUS
= 220µF electrolytic, L
BUS
=
12µH.
(3) Note that Maximum Power Derating curves indicate an average current
at nominal input voltage. At higher temperatures and/or lower airflow, the
DC/DC converter will tolerate shorter full current outputs if the total RMS
current over time does not exceed the Derating curve.
(4) Mean Time Before Failure is calculated using the Telcordia (Belcore)
SR-332 Method 1, Case 3, ground fixed conditions, T
PCBOARD
= +25°C,
full output load, natural air convection.
(5) The On/Off Control may be driven with external logic or by applying
appropriate external voltages which are referenced to Input Common.
The On/Off Control Input should use either an open collector/open drain
transistor or logic gate which does not exceed +V
IN
.
The On/Off Control may also be supplied with negative logic (LO = on,
HI = off) under special quantity order.
(6) Short circuit shutdown begins when the output voltage degrades
approximately 2% from the selected setting.
(7) The outputs are not intended to sink appreciable reverse current. If the
outputs are forced to sink excessive current, damage may result.
(8) Output noise may be further reduced by adding an external filter. See
I/O Filtering and Noise Reduction.
(9) All models are fully operational and meet published specifications,
including “cold start” at –40°C.
(10) Contact DATEL for availability of all models.
(11) Alternate pin length and/or other output voltages are available under
special quantity order.
Restriction of Hazardous Substance (RoHS) Compliance
The UVQ series are designed to comply with RoHS requirements in a
phased program while retaining high performance, reasonable costs and
product availability. For more background, please refer to our website at
www.datel.com/rohs_dir.html. Or contact DATEL for full details.
2
2 . 5 - 4 0 A M P I S O L AT E D D C / D C C O N V E R T E R S
UVQ Series
PA R T N U M B E R S T R U C T U R E
U VQ
-
3.3
/
20
-
D48 N B
Output Configuration:
U = Unipolar/Single
Quarter-Brick Package
Nominal Output Voltage:
2.5/3.3/5/12/15/18/24/48 Volts
Maximum Rated Output
Current in Amps
Input Voltage Range:
D48 = 36-75 Volts (48V nominal)
D24 = 18-36 Volts (24V nominal)
B =
Baseplate installed
Blank =
No baseplate
Remote On/Off Control Polarity:
Add "P" for positive polarity
Add "N" for negative polarity
Note:
Not all model number combinations
are available. Contact DATEL.
M E C H A N I C A L
S P E C I F I C A T I O N S
½½½½½½
½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
½½½½½
½½½½½½
½
CASE C59
With Baseplate
½½½½
½½½½½
½½½½½½½
½½½½½½½
½½½½½½½½½½½½
CASE C59
½
½
½
½
½
½
½
½
½
½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½
½½½½½½½½½
½
½½½½½½
½½½½½½½
½½½½
½½½½½½½½½½½½
½½½½½½½
½½½½½½½½
½½½½½½
½½½½
½½½½½½½
½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
½½½½½
½½½½½½
½
½
½½½½½½½½½½½½
Alternate pin lengths are available. Contact DATEL.
½½½½½½½½½½½½
I/O Connections
Pin
1
2
3
4
5
6
7
8
Function P32
–Input
On/Off Control
+Input
–Output
–Sense
Output Trim
+Sense
+Output
½½½½½½½½½½½
½
* The Remote On/Off
can be provided with
either positive (P suffix)
or negative (N suffix)
polarity.
Optional baseplate pin
is special order.
Contact DATEL.
½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½
½
½
½
½
½
½
½
½
½½½½½½½½½½½½½
½½½½½½½½½½½½
½½½½½½½½½½½½½½
½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
3
½
½½½½½½½½½½½½
½
½½½½½½½½½½½½½
½
½
UVQ Series
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage, nominal output voltage, natural air convection,
external caps and full-load conditions, unless noted.
(1)
2 . 5 - 4 0 A M P I S O L AT E D D C / D C C O N V E R T E R S
Input
Input Voltage Range
Start-Up Threshold
24V models
48V models
Undervoltage Shutdown
24V models
48V models
Overvoltage Shutdown
24V models
48V models
Reflected (Back) Ripple Current
(2)
See Ordering Guide
16.5-17.5 Volts (17V typical)
34-35.9 Volts (35V typical)
16-17.5 Volts (16.75V typical)
32-35 Volts (33.5V typical)
37-41 Volts (39V typical)
Not applicable
(11)
8-15mAp-p
Line/Load Regulation
Efficiency
Isolation Voltage
Input to Output
Input to Baseplate
Baseplate to Output
Isolation Resistance
Isolation Capacitance
Isolation Safety Rating
Current Limit Inception
(98% of V
OUT
)
UVQ-2.5/40-D48
UVQ-3.3
UVQ-5/25-D48
UVQ-12/8-D24
UVQ-12/10-D48
UVQ-15/7
UVQ-18
UVQ-24
UVQ-48/2.5-D48
Short Circuit Protection Method
(6)
Remove overload for recovery.
Short Circuit Current
UVQ-2.5/40-D48
UVQ-3.3/35
UVQ-5/25-D48
UVQ-12/8-D24
UVQ-12/10-D48
UVQ-15/7
UVQ-18/5.6-D24
UVQ-18/6-D48
UVQ-24/4.5
UVQ-48/2.5-D48
Short Circuit Duration
Overvoltage Protection
2.5 or 3.3V output
5V output
12V outputs
15V outputs
18V outputs
48V outputs
Method
See Ordering Guide
(10)
(See Tech. Notes)
See Ordering Guide
2250Vdc min.
1500Vdc min.
1000Vdc min.
100MΩ
1500pF
Basic insulation
45 Amps
42 Amps
40 Amps
10 Amps
12.5 Amps
10 Amps
7 Amps
6 Amps
4 Amps
Current limiting with hiccup autorestart.
Input Current:
Full Load Conditions
See Ordering Guide
Inrush Transient
0.05-0.1A
2
sec.
Output Short Circuit
10-50mA, model dependent
No Load
24V models
120mA
48V models
30mA
Low Line (V
IN
= V
MIN
)
UVQ-2.5/35-D48
2.66 Amps
UVQ-3.3/35-D48
3.47 Amps
UVQ-5/25-D48
4.46 Amps
UVQ-12/8-D24
5.93 Amps
UVQ-12/10-D48
3.58 Amps
UVQ-15/7-D24
6.27 Amps
UVQ-15/7-D48
3.10 Amps
UVQ-18/6-D24
6.45 Amps
UVQ-18/6-D48
3.33 Amps
UVQ-24/4.5-D24
6.38 Amps
UVQ-24/4.5-D48
3.19 Amps
Standby Mode (Off, UV, OT shutdown) 1mA
Internal Input Filter Type
Reverse Polarity Protection
Remote On/Off Control
Positive Logic (“P” model suffix)
(5)
LC
See fuse information
OFF = ground pin to +0.8 V max.
ON = open pin or +3.5V min. to +13.5V max.
ON = ground pin to +0.8 V max.
OFF = open pin or +3.5V min. to +13.5V max.
2 mA maximum
4 Amps
3.5 Amps
2.5 Amps
0.8 Amps
1 Amps
0.7 Amps
0.5 Amps
0.6 Amps
0.5 Amps
0.25 Amps
Continuous, output shorted to ground
(no damage)
TBD
6Vdc
14.4Vdc
18Vdc
22Vdc
55Vdc
Magnetic feedback
Negative Logic (“N” model suffix)
Current
Voltage Output Range
Voltage Output Accuracy
Voltage Adjustment Range
(12)
Temperature Coefficient
Minimum Loading
Remote Sense Compensation
Output
See Ordering Guide
±1 % of V
NOM
–20% to +10% of nominal
±0.02% of V
OUT
range per °C
No minimum load
+10%
Dynamic Characteristics
Dynamic Load Response
(50% to 100% load step)
2.5 or 5V outputs
200µsec to ±1% of final value
3.3 or 5V outputs
150µsec to ±1% of final value
12V D24 outputs
50µsec to ±1% of final value
12V D48 outputs
75µsec to ±1% of final value
15V outputs
75µSec to ±2% of final value
18V D24 outputs
50µsec to ±1% of final value
18V D48 outputs
75µsec to ±1% of final value
24V outputs
75µsec to ±2% of final value
48V outputs
150µsec to ±2% of final value
Start-Up Time
50msec for V
OUT
= nominal
(V
IN
on to V
OUT
regulated or On/Off to V
OUT
)
Switching Frequency
2.5, 3.3, 5V, 48 models
12V models
15, 24V models
18V models
600 ±50kHz
290 ±30kHz
200kHz
240 ±25kHz
Maximum Capacitive Loading
(Low ESR <0.02Ω max.)
UVQ-2.5/35-D48
10,000µF typ., 20,000µF max.
UVQ-3.3/35-D48
10,000µF typ., 20,000µF max.
UVQ-5/25-D48
10,000µF typ., 20,000µF max.
UVQ-12/8-D24
4700µF max.
UVQ-12/10-D48
4700µF typ., 10,000µF max.
UVQ-15/7-D24
4700µF typ., 10,000µF max.
UVQ-15/7-D48
4700µF typ., 10,000µF max.
UVQ-18/6-D24
4700µF max.
UVQ-18/6-D48
2200µF typ., 4700µF max.
UVQ-24/4.5-D24
4700µF typ., 10,000µF max.
UVQ-24/4.5-D48
4700µF typ., 10,000µF max.
UVQ-48/2.5-D48
10,000µF max.
Ripple/Noise
(20MHz bandwidth)
See Ordering Guide
(8)
4
2 . 5 - 4 0 A M P I S O L AT E D D C / D C C O N V E R T E R S
UVQ Series
Environmental
Calculated MTBF
(4)
Operating Temperature Range
(Ambient)
No derating, 200 LFM airflow
(all models except 18V-D24)
No derating, 200 LFM airflow
With derating
Operating Temperature with Baseplate
Storage Temperature Range
Thermal Protection/Shutdown
Density Altitude
Relative Humidity
TBD Hours
No baseplate
–40 to +70°C
(9)
–40 to +45°C (18V-D24 models)
See Derating Curves
–40 to +110°C maximum
(No derating required)
(3) (13)
–55 to +125°C
+110°C
0 to 10,000 feet
10% to 90%, non-condensing
Storage Temperature
Input Voltage
Continuous
Transient (100 mS)
On/Off Control
Absolute Maximum Ratings
24V models
0 to +36V
+50V
See Fuse section
V
OUT
+20% max.
Current-limited. Devices can
withstand sustained short circuit
without damage.
–55 to +125°C
48V models
0 to +75V
+100V
–0.3 V min to +13.5V max.
Input Reverse Polarity Protection
Output Overvoltage
Output Current
(Note 7)
Lead Temperature
(soldering 10 sec.) +300°C
Absolute maximums 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 nor recommended.
Physical
Outline Dimensions
Baseplate Material
Pin Material
Weight
Electromagnetic Interference
See Mechanical Specifications
Aluminum
Solder-coated brass
TBD ounces (TBD grams)
FCC part 15, class B, EN55022
(conducted and radiated)
(may need external filter)
UL/cUL 60950 CSA-C22.2 No.234
IEC/EN 60950
TECHNICAL NOTES
Removal of Soldered UVQ's from Printed Circuit Boards
Should removal of the UVQ from its soldered connection be needed, thor-
oughly de-solder the pins using solder wicks or de-soldering tools. At no time
should any prying or leverage be used to remove boards that have not been
properly de-soldered first.
Input Source Impedance
UVQ converters must be driven from a low ac-impedance input source.
The DC/DC’s performance and stability can be compromised by the use of
highly inductive source impedances. The input circuit shown in Figure 2 is a
practical solution that can be used to minimize the effects of inductance in
the input traces. For optimum performance, components should be mounted
close to the DC/DC converter.
I/O Filtering, Input Ripple Current, and Output Noise
All models in the UVQ Series are tested/specified for input ripple current
(also called input reflected ripple current) and output noise using the circuits
and layout shown in Figures 2 and 3.
TO
OSCILLOSCOPE
CURRENT
PROBE
Safety
(1)
All models are tested and specified with 200 LFM airflow, external 1||10µF ceramic/tantalum
output capacitors and a 33µF external input capacitor. All capacitors are low ESR types. These
capacitors are necessary to accommodate our test equipment and may not be required to
achieve specified performance in your applications. All models are stable and regulate within
spec under no-load conditions.
General conditions for Specifications are +25°C, V
IN
=nominal, V
OUT
= nominal, full load.
(2)
Input Ripple Current is tested and specified over a 5-20MHz bandwidth. Input filtering is
C
IN
= 33µF tantalum, C
BUS
= 220µF electrolytic, L
BUS
= 12µH.
Note that Maximum Power Derating curves indicate an average current at nominal input
voltage. At higher temperatures and/or lower airflow, the DC/DC converter will tolerate brief full
current outputs if the total RMS current over time does not exceed the Derating curve.
Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case
3, ground fixed conditions, Tpcboard = +25°C, full output load, natural air convection.
The On/Off Control may be driven with external logic or by applying appropriate external
voltages which are referenced to Input Common. The On/Off Control Input should use either an
open collector/open drain transistor or logic gate which does not exceed +13.5V.
Short circuit shutdown begins when the output voltage degrades approximately 2% from the
selected setting.
The outputs are not intended to sink appreciable reverse current. Sinking excessive reverse
current may damage the outputs.
(3)
(4)
(5)
(6)
(7)
3
+INPUT
(
8)
Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise
Reduction.
(9)
(10)
+
L
BUS
C
BUS
C
IN
1
C
IN
= 33µF, ESR < 700mΩ @ 100kHz
C
BUS
= 220µF, ESR < 100mΩ @ 100kHz
L
BUS
= 12µH
All models are fully operational and meet published specifications, including “cold start” at –40°C.
Regulation specifications describe the deviation as the line input voltage or output load current
is varied from a nominal midpoint value to either extreme.
Overvoltage shutdown on 48V input models is not supplied in order to comply with telecom
reliability requirements. These requirements attempt continued operation despite significant
input overvoltage.
Do not exceed maximum power specifications when adjusting the output trim.
Note that the converter may operate up to +110°C with the baseplate installed. However,
thermal self-protection occurs near +110°C. Therefore, +100°C is recommended to avoid
thermal shutdown.
V
IN
–
–INPUT
(11)
(12)
(13)
Figure 2. Measuring Input Ripple Current
External input capacitors (C
IN
in Figure 2) serve primarily as energy-stor-
age elements. They should be selected for bulk capacitance (at appropriate
frequencies), low ESR, and high rms-ripple-current ratings. The switching
nature of DC/DC converters requires that dc voltage sources have low ac
impedance as highly inductive source impedance can affect system stability.
In Figure 2, C
BUS
and L
BUS
simulate a typical dc voltage bus. Your specific
system configuration may necessitate additional considerations.
5
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