PRELIMINARY
Single Output
UQQ Models
Wide Input Range, Quarter-Brick
7-25 Amp Isolated DC/DC Converters
Features
■
Standard quarter-brick package/pinout
in through-hole version
Low cost; Low profile, 0.35" (8.9mm)
9-36V or 18-75V wide range inputs
Output current: 7 to 25 Amps
Output voltages: 3.3, 5, 12 or 15V
Interleaved synchronous-rectifier topology
·
Ultra high efficiency
·
No output reverse conduction
Outstanding thermal performance
On/off control, trim & sense functions
Fully isolated, up to 2250Vdc (BASIC)
Output overvoltage protection
Fully I/O protected; Thermal shutdown
UL/EN/IEC60950 safety approvals
Designed for RoHS compliance
■
■
■
■
■
■
■
■
■
■
■
■
For applications requiring wide range input, improved electrical and thermal
perfomance consider DATEL's new UQQ Series "Quarter-Brick" DC/DC Convert-
ers. They measure just 1.45 x 2.30 x 0.35 inches (36.8 x 58.4 x 8.9mm) and fit the
industry-standard footprint.
From an 9-36V or 18-75V input, UQQ's deliver outputs of 3.3V, 5V,12V or 15V.
They employ an interleaved, synchronous-rectifier topology that exploits 100% of their
duty cycle. They simultaneously achieve ultra-high efficiency (to 91%), tight line/load
regulation, low noise, and quick step response.
A state of the art, single-board, open-frame design with reduced component
count, high efficiency, low-on-resistance FET's, and planar magnetics embedded in
heavy-copper pc boards all contribute to impressive thermal derating.
The UQQ's feature set includes high isolation, input pi filters, input undervoltage
shutdown, output overvoltage protection, current limiting, short-circuit protection and
thermal shutdown. The standard footprint carries on/off control (positive or negative
polarity), output trim (+10/–20%) and output sense functions.
All UQQ quarter-bricks are designed to meet the BASIC-insulation require-
ments of UL/EN/IEC60950 and they will carry the CE mark. Safety certifications,
EMC compliance testing and qualification testing (including HALT) are currently in
progress. Contact DATEL for latest updates.
Figure 1. Simplified Schematic
UQQ Series
➀
7 - 2 5 A M P, 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
UQQ-3.3/25-Q12
UQQ-3.3/25-Q48
UQQ-5/17-Q12
UQQ-5/20-Q48
UQQ-12/8-Q12
UQQ-12/8-Q48
UQQ-15/7-Q12
V
OUT
(Volts)
3.3
3.3
5
5
12
12
15
I
OUT
(Amps)
25
25
17
20
8
8
7
R/N (mVp-p)
➁
Typ.
40
40
40
40
40
40
40
Max.
75
75
75
75
75
75
75
Input
Regulation
Line
±0.05%
±0.05%
±0.05%
±0.05%
±0.05%
±0.05%
±0.05%
Load
➂
±0.1%
±0.1%
±0.1%
±0.1%
±0.1%
±0.1%
±0.1%
V
IN
Nom.
(Volts)
12
48
12
48
12
48
12
Range
(Volts)
9-36
18-75
9-36
18-75
9-36
18-75
9-36
I
IN
➃
(mA/A)
150/5.0
150/1.92
150/7.3
150/2.3
180/9.0
180/2.2
250/9.67
Efficiency
Min.
87.5%
87.5%
88.5%
87%
87.5%
88%
89%
Typ.
89.5%
89.5%
90%
89%
89%
91%
90.5%
Package
(Case/
Pinout)
C68,P32
C68,P32
C68,P32
C68,P32
C68,P32
C68,P32
C68,P32
➀
Typical at T
A
= +25°C under nominal line voltage and full-load conditions. All models are
specified with an external 1µF multi-layer ceramic and 10µF capacitors across their output pins
and 100µF external input capacitor.
➁
Ripple/Noise (R/N) measured over a 20MHz bandwidth.
➂
Devices have no minimum-load requirements and will regulate under no-load conditions.
Regulation specifications describe the output voltage deviation as the line voltage or load is
varied from its nominal/midpoint value to either extreme. (Load step = 50%.)
➃
Nominal line voltage, no load/full load condition.
➄
Add "N" or "P" to the part number for Remote Control Polarity. See Part Number Structure.
PA R T N U M B E R S T R U C T U R E
M E C H A N I C A L S P E C I F I C AT I O N S
U QQ
-
5
/
17
-
Q12 N Lx B
Output
Configuration
Quarter-Brick Package
Nominal Output Voltage
Maximum Rated Output
Input Voltage Range
Pin Length Option
L1
= 0.110 (2.79mm)
L2
= 0.145 (3.68mm)
Blank
= Std. pin length
Remote On/Off Control Polarity:
Add "P" for positive polarity
Add "N" for negative polarity
Baseplate:
Blank = no baseplate
"B" = add baseplate
Case C68
ALL DIMENSIONS ARE IN INCHES (MM)
Note:
Not all model number combinations
are available. Contact DATEL.
I/O Connections
Pin Function P32
1
–Input
2 Remote On/Off*
3
+Input
4
–Output
Pin
5
6
7
8
Function P32
–Sense
Output Trim
+Sense
+Output
* The Remote On/Off can be provided with either
positive ("P" suffix) or negative ("N" suffix) polarity.
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2
UQQ Series
7 - 2 5 A M P, 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 and Functional Specifications
(1)
UQQ-3.3/25-Q12
INPUT
Input Voltage Range
Start-up Threshold
Undervoltage Shutdown
Overvoltage Shutdown
Reflected (back) ripple current
(2)
Input Current
Full load conditions
Inrush transient
Output short circuit
No load
Low line (V
IN
= min.)
Standby mode
(Off, UV, OT shutdown)
Internal Input Filter Type
Reverse Polarity Protection
Remote On/Off Control
(5)
Positive logic (“P” suffix)
Negative logic (“N” suffix)
Current
OUTPUT
Voltage Output Range
Voltage Output Accuracy
Adjustment Range
Temperature Coefficient
Minimum Loading
Remote Sense Compensation
Ripple/noise (20MHz bandwidth)
Line/Load Regulation
Efficiency
Maximum Capacitive Loading
Low ESR <0.02Ω max.,
resistive load
Isolation Voltage
Input to Output
Input fo baseplate
Baseplate to output
Isolation resistance
Isolation capacitance
Isolation safety rating
Current limit inception
(98% of Vout, after warmup)
Short Circuit Protection Method
Short Circuit Current
Short Circuit Duration
Overvoltage Protection
via magnetic feedback
6 Volts
3.96 Volts max.
5 Amps
5 Amps
2000 Volts min.
1500 Volts min.
750 Volts min.
100MΩ
1500 pF
Basic insulation
29 Amps
2250 Volts min.
1500 Volts min.
500 Volts min.
100MΩ
1000 pF
Basic insulation
29 Amps
2000 Volts min.
1500 Volts min.
750 Volts min.
100MΩ
1500 pF
Basic insulation
20.5 Amps
2250 Vvolts min.
1500 Volts min.
750 Volts min.
100MΩ
1500pF
Basic insulation
25 Amps
2250 Volts min.
1500 Volts min.
750 Volts min.
100MΩ
1000 pF
Basic insulation
10 Amps
Basic insulation
100MΩ
1500 Volts min.
2000 Volts min.
1500 Volts min.
1500 Volts min.
100MΩ
1000 pF
Basic insulation
9.5 Amps
10,000µF
4700µF
10,000µF
10,000µF
4700µF
4700µF
See ordering guide
+10%
+10%
+10%
±1% of V
NOM
(50% load)
–20 to +10% of
V
NOM
±0.02% of
V
OUT
range/°C
±1.25% of V
NOM
(50% load)
–15 to +10% of
V
NOM
±0.02% of
V
OUT
range/°C
±1% of V
NOM
(50% load)
–20 to +10% of
V
NOM
±0.02% of
V
OUT
range/°C
See ordering guide
±1% of V
NOM
(50% load)
–20 to +10% of
V
NOM
±0.02% of
V
OUT
range/°C
No minimum load
+10%
+10%
+10%
+10%
±1% of V
NOM
(50% load)
–20 to +10% of
V
NOM
±0.02% of
V
OUT
range/°C
±0.02% of
V
OUT
range/°C
(50% load)
±1.25% of V
NOM
(50% load)
–20 to +10% of
V
NOM
±0.02% of
V
OUT
range/°C
1 mA
1 mA
0.1A
2
sec
250mA
150mA
10.19 Amps
8mA
LC
Yes (15)
0.1A
2
sec
100mA
80mA
5.04 Amps
2mA
Pi-type
NA
0.1A
2
sec
100mA
150mA
10.49 Amps
8mA
L-C
Yes (15)
See ordering guide
0.1A
2
sec
250mA
150mA
6.11 Amps
8mA
L-C
Yes (15)
0.1A
2
sec
250mA
180mA
11.99 Amps
5mA
L-C
Yes (15)
0.1A
2
sec
0.1A
2
sec
250mA
250mA
10.20 Amps
5mA
L-C
Yes (15)
9.0 Volts
8.0 Volts
40.0 Volts
25mAp-p
17.50 Volts
16.75 Volts
NA
15mAp-p
9.0 Volts
8.0 Volts
37.5 Volts
75mAp-p
See ordering guide
17.5 Volts
16.75 Volts
None
25mAp-p
9.0 Volts
8.0 Volts
37.5 Volts
75mAp-p
9.0 Volts
8.0 Volts
38.5 Volts
50mAp-p
UQQ-3.3/25-Q48
UQQ-5/17-Q12
UQQ-5/20-Q48
UQQ-12/8-Q12
UQQ-12/8-Q48
UQQ-15/7-Q12
OFF = Ground pin to +0.8V max. ON = open or +3.5-15V max.
OFF = open or +5 to +V
IN
max. ON = Ground pin to +0.8V max. (16)
1 mA
1mA
1 mA
1 mA
Current limiting, hiccup autorestart. Remove overload for recovery.
0.5 Amps
6 Volts
5 Amps
6 Volts
0.5 Amps
14.4 Volts
0.5 Amps
18 Volts
Continuous, output shorted to ground (no damage)
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3
UQQ Series
7 - 2 5 A M P, 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
UQQ-3.3/25-Q12
DYNAMIC CHARACTERISTICS
Dynamic Load Response
50µsec to ±1%
of final value
(50-75-50%
load step)
10msec
5msec
255 ±25kHz
UQQ-3.3/25-Q48
UQQ-5/17-Q12
UQQ-5/20-Q48
UQQ-12/8-Q12
UQQ-12/8-Q48
UQQ-15/7-Q12
100µsec to ±1%
of final value
(50-75-50%
load step)
50msec max.
50msec max.
200 ±20kHz
50µsec to ±1%
of final value
(50-75-50%
load step)
10msec
5msec
260 ±25kHz
50µsec to ±1%
of final value
(50-75-50%
load step)
10msec
5msec
255 ±25kHz
50µsec to ±1%
of final value
(50-75-50%
load step)
10msec
5msec
260 ±25kHz
50µsec to ±1%
of final value
(50-75-50%
load step)
50µsec to ±1%
of final value
(50-75-50%
load step)
10msec
5msec
260 ±25kHz
Start-up Time
V
IN
to V
OUT
regulated
Remote On/Off to V
OUT
regulated
Switching frequency
ENVIRONMENTAL
Calculated MTBF
(4)
Operating Temperature Range
(Ambient) No baseplate, 300 lfm,
no derating, vertical mount
With derating
Operating Temperature Range
with baseplate
(no derating required) (3)(14)
Storage Temperature Range
Thermal Protection/Shutdown
Relative humidity
PHYSICAL
Outline dimensions
Baseplate material
Pin material
Pin diameter
Weight
Electromagnetic interference
(conducted and radiated)
(external filter required)
Safety
Specification Notes:
(1) All models are tested and specified with 300 lfm airflow, external 1 || 10µF ceramic/tantalum
output capacitors and a 100µF 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
unless noted.
(2) Input Ripple Current is tested and specified over a 5Hz to 20MHz 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 brief
full current outputs if the total RMS current over time does not exceed the Derating curve. All
Derating curves are presented at sea level altitude. Be aware of reduced power dissipation
with increasing density altitude.
(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 volt-
ages which are referenced to Input Common. The On/Off Control Input should use either an
open collector/open drain transistor or logic gate.
(6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the
selected setting.
TBC
–40 to +30°C
TBC
–40 to +70°C
TBC
–40 to +67°C
TBC
–40 to +30°C
TBC
–40 to +46°C
TBC
TBC
–40 to +52°C
See Derating curves
–40 to +105°C
–40 to +105°C
–40 to +105°C
–40 to +105°C
–40 to +105°C
–55 to +125°C
+120°C
–55 to +125°C
+120°C
–55 to +125°C
+120°C
–55 to +125°C
+120°C
–55 to +125°C
+120°C
–55 to +125°C
+120°C
–55 to +125°C
+120°C
To +85°C/85% non-condensing
See mechanical specifications
Aluminum
Copper alloy
0.04/0.062 inches, 1.016/1.524 mm
1 ounce (28 grams)
FCC part 15, class B, EN55022
UL/cUL 60950, CSA-C22.2 No.60950, IEC/EN 60950
(7) The outputs are not intended to sink appreciable reverse current. Sinking excessive reverse
current may damage the outputs.
(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) Regulation specifications describe the deviation as the line input voltage or output load current
is varied from a nominal midpoint value to either extreme.
(11) Alternate pin length and/or other output voltages are available under special quantity order.
(12) Overvoltage shutdown on 48V input models can be eliminated under special quantity order.
OV shutdown can be deleted in order to comply with certain telecom reliability requirements.
These requirements attempt continued operation despite significant input overvoltage.
(13) Do not exceed maximum power specifications when adjusting the output trim.
(14) Note that the converter may operate up to +105°C with the baseplate installed (+100°C for the
UQQ-3.3/25-Q48). However, thermal self-protection occurs near +120°C Therefore, +105°C is
recommended to avoid thermal shutdown.
(15) If reverse polarity is accidentally applied to the input, a body diode will become forward biased
and will accept considerable current. To ensure reverse input protection, always connect an
external input fuse in series with the +V
IN
input. Use approximately twice the full input current
rating with nominal input voltage.
(16) For On/Off Control on negative-polarity UQQ-3.3/25-Q48N models, the maximum OFF mode
control voltage is +13.5 Volts. For the ON mode, the range is pin grounded to +1 Volt max.
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4
UQQ Series
7 - 2 5 A M P, 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
Absolute Maximum Ratings
Input Voltage
Continuous
Transient (100msec)
On/Off Control
Input Reverse Polarity Protection
Output Overvoltage
Output Current
(7)
12V models
0 to +36V
+50V
48V models
0 to +75V
+100V
0V min to +13.5V max.
See Fuse section
V
OUT
+20% max.
Current-limited. Devices can
withstand sustained short circuit
without damage.
–55 to +125
°
C
+280
°
C
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.
In critical applications, output ripple/noise (also referred to as periodic and
random deviations or PARD) can be reduced below specified limits using
filtering techniques, the simplest of which is the installation of additional
external output capacitors. Output capacitors function as true filter elements
and should be selected for bulk capacitance, low ESR, and appropriate
frequency response. In Figure 3, the two copper strips simulate real-world
pcb impedances between the power supply and its load. Scope measurements
should be made using BNC connectors or the probe ground should be less
than ½ inch and soldered directly to the fixture.
All external capacitors should have appropriate voltage ratings and be
located as close to the converter as possible. Temperature variations for all
relevant parameters should be taken into consideration. OS-CON
TM
organic
semiconductor capacitors (www.sanyo.com) can be especially effective for
further reduction of ripple/noise.
The most effective combination of external I/O capacitors will be a function
of line voltage and source impedance, as well as particular load and layout
conditions. Our Applications Engineers can recommend potential solutions
and 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.
Storage Temperature
Lead Temperature
(soldering 10 sec. max.)
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.
TECHNICAL NOTES
Removal of Soldered UQQ's from Printed Circuit Boards
Should removal of the UQQ 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
UQQ 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 UQQ 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.
+SENSE
+OUTPUT
7
8
COPPER STRIP
C1
4
–OUTPUT
5
–SENSE
C2
SCOPE
R
LOAD
COPPER STRIP
TO
OSCILLOSCOPE
C1 = 1µF CERAMIC
C2 = 10µF TANTALUM
LOAD 2-3 INCHES (51-76mm) FROM MODULE
CURRENT
PROBE
L
BUS
3
+INPUT
Figure 3. Measuring Output Ripple/Noise (PARD)
+
V
IN
–
C
BUS
C
IN
1
–INPUT
C
IN
= 33µF, ESR < 700mΩ @ 100kHz
C
BUS
= 220µF, ESR < 100mΩ @ 100kHz
L
BUS
= 12µH
Figure 2. Measuring Input Ripple Current
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5
Embedded System
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