OPTO
ISOLATION
PWM
CONTROLLER
+V
IN
V
IN
+12V (+15V)
COMMON
ON/OFF
CONTROL
(SYNC)
REFERENCE &
ERROR
AMPLIFIER
TRIM
12V (15V)
+5V
CASE
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
Triple Output
TPB Models
High-Efficiency, Smaller-Package
25-40 Watt, DC/DC Converters
Features
DATEL's TPB Model, 25-40 Watt, triple-output DC/DC power converters bring you
efficient "on-board" power processing in a cost-effective smaller package with a
standard pinout. The 2" x 3" TPB "footprint" conforms with the industry-standard pinout
and pin geometries of most 3" x 3" devices (a 33% space savings) while delivering as
much as 60% more power (40W vs. 25W).
Applicable to a wide range of telecom, computer and other OEM applications, TPB
Model DC/DC's operate from four input voltage ranges (10-36V for "Q12" models, 18-
36V for "D24" models, 18-72V for "Q48" models, and 36-72V for "D48" models).
Available output voltages are +5 and 12V or +5 and 15V.
For improved reliability and affordability, DATEL uses contemporary, high-speed,
automatic-assembly techniques to construct the TPB's traditional, field-proven, SMT-on-
pcb designs. Devices employ corrosion-resistant steel cases with heavy zinc top plates
(traditionally referred to as baseplates). Heat generating transformer cores and power
semiconductors are mounted directly to the baseplates, which also have threaded
inserts for add-on heat sinks or pcb mounting. Temperature derating information is
provided for operation with and without heat sinks and forced air flow.
All devices feature input pi filters, input overvoltage shutdown, output overvoltage
protection, output current limiting, and thermal shutdown. All units are temperature
cycled, burned in and automatically tested prior to shipment. UL, CSA, EN and IEC
compliance testing is currently under way as are full EMI/EMC characterizations.
Figure 1. Simplified Schematic
INNOVATION and EX C ELL E N C E
25/30/35/40W output power
Standard pinout! Smaller size!
New 2" x 3" package fits 3" x 3" footprint
Output voltages: +5V/12V or +5V/15V
Four input voltage ranges:
10-36V, 18-36V
18-72V, 36-72V
High efficiencies (to 86%)
Fully isolated, 750Vdc guaranteed
Thermal shutdown
V
OUT
trim and on/off control
Safety approvals pending
Modifications and customs for OEM's
2 5 - 4 0 W , T R I P L E O U T P U T D C / D C C O N V E R T E R S
XPB Series
2
Typical at T
A
= +25C under nominal line voltage and "full-load" conditions unless otherwise
noted. The specific combination of primary and auxiliary currents comprising "full load" varies
with part number. See Ouput Power Considerations and Technical Notes for more details.
I/O Connections
Function P16
No Pin
Input
+Input
Case
On/Off Control*
12V/15V Out
+12V/15V Out
Common
+5V
Out
Trim
Pin
1
2
3
4
5
6
7
8
9
10
* See note 4 on next page.
Input Voltage Range:
Q12
= 10-36 Volts (24V nom.)
D24
= 18-36 Volts (24V nom.)
Q48
= 18-72 Volts (48V nom.)
D48
= 36-72 Volts (48V nom.)
Nominal Auxiliary Output
Voltages (12 or 15 Volts)
Output Configuration:
T
= Triple
Nominal Primary Output
Voltage (+5 Volts)
5
T PB
5
-
/
D48
-
Maximum Primary Output
Current in Amps
Power Package with
Metal Baseplate
12 1
-
/
Maximum Auxiliary Output
Currents in Amps from each output
TPB-5/5-12/1-Q12
TPB-5/5-12/1-D24
TPB-5/5-12/1-Q48
TPB-5/5-12/1-D48
TPB-5/5-15/1-Q12
TPB-5/5-15/1-D24
TPB-5/5-15/1-Q48
TPB-5/5-15/1-D48
+5
12
+5
12
+5
12
+5
12
+5
15
+5
15
+5
15
+5
15
Performance Specifications and Ordering Guide
I
OUT
(Amps)
R/N (mVp-p)
Load
V
OUT
(Volts)
Output
Package
(Case,
Pinout)
Efficiency
Regulation (Max.)
Line
V
IN
Nom.
(Volts)
Range
(Volts)
Model
Input
I
IN
(mA)
Max.
Typ.
Typ.
Min.
10-36
18-36
18-72
36-72
10-36
18-36
18-72
36-72
24
24
48
48
24
24
48
48
C10, P16
C10, P16
C10, P16
C10, P16
C10, P16
C10, P16
C10, P16
C10, P16
5
1
5
1
5
1
5
1
5
1
5
1
5
1
5
1
125
120
125
120
125
120
125
120
125
150
125
150
125
150
125
150
1%
1.5%
1%
1.5%
1%
1.5%
1%
1.5%
1%
1.5%
1%
1.5%
1%
1.5%
1%
1.5%
1.5%
8%
1.5%
8%
1.5%
8%
1.5%
8%
1.5%
8%
1.5%
8%
1.5%
8%
1.5%
8%
35/1240
35/1716
20/737
25/967
35/1238
35/1696
20/735
25/981
82%
83%
82%
83%
82%
83%
82%
83%
P A R T N U M B E R S T R U C T U R E
Model
Maximum Output Power
Q12
25 Watts
Q48
30 Watts
D24
35 Watts
D48
40 Watts
M E C H A N I C A L S P E C I F I C A T I O N S
As shown below, TPB Model DC/DC Converters are classified by output power.
For triple-output devices, the sum of the output power from the primary +5V
output plus that from the two auxiliary (12V or 15V) outputs can not exceed
the rated power. For example, "D24" models have a maximum power of 35W.
Therefore, if you source the maximum primary current of 5A, the devices will
only be able to provide 10W of total power from their auxilliary outputs.
75
100
75
100
75
100
75
100
75
120
75
120
75
120
75
120
84%
85%
85%
86%
85%
86%
85%
85%
Ripple/Noise (R/N) measured over a 20MHz bandwidth.
10-100% load on the primary +5V output, 20-100% balanced loads on the auxiliary outputs.
Nominal line voltage, no-load/full-load conditions.
O U T P U T P O W E R C O N S I D E R A T I O N S
2.600
(66.04)
0.20
(5.08)
2.00
(50.80)
1.200
(30.48)
3.00
(76.20)
0.50
(12.70)
0.40
(10.16)
0.10
(2.54)
0.120 DIA. (3.048)
(4 PLACES)
MATERIAL: BLACK ANODIZED ALUMINUM
4 MOUNTING SCREWS AND 0.009 (0.229) THERMAL PAD INCLUDED
TOP VIEW
Optional Heat Sink
(Part Number HS-23)
BOTTOM VIEW
2.500
(63.50)
0.25
(6.35)
2.00
(50.80)
7
6
8
9
1.600
(40.64)
4 EQ. SP. @
0.400 (10.16)
4
1
2
0.20
(5.08)
1.200
(30.48)
2.600
(66.04)
0.40
(10.16)
3.00
(76.20)
(4) THREADED INSERTS
#4-40 THD THRU
WITH 0.025 (0.64)
STANDOFFS
0.20
(5.08)
3
5
10
0.50
(12.70)
0.20 MIN.
(5.08)
0.040 0.002 DIA.
(1.016 0.051)
0.025
(0.64)
METAL CASE
METAL
BASEPLATE
Case C10
TPB Models
2 5 - 4 0 W , T R I P L E O U T P U T D C / D C C O N V E R T E R S
3
Performance/Functional Specifications
Typical @ T
A
= +25C under nominal line voltage and "full-load" conditions, unless noted.
Input
Input Voltage Range:
Q12 Models
10-36 Volts (24V nominal)
D24 Models
18-36 Volts (24V nominal)
Q48 Models
18-72 Volts (48V nominal)
D48 Models
36-72 Volts (48V nominal)
Input Current
See Ordering Guide
Input Filter Type
Pi
Overvoltage Shutdown:
Q12 and D24 Models
40 Volts
Q48 and D48 Models
80 Volts
Reverse-Polarity Protection
Yes (Instantaneous, 6A maximum)
On/Off Control
(Pin 5)
TTL high (or open) = on, low = off
Output
V
OUT
Accuracy
(50% load):
+5V Output
1%
12V or 15V Outputs
3%
Temperature Coefficient
0.02% per C
Ripple/Noise
(20MHz BW)
See Ordering Guide
Line/Load Regulation
See Ordering Guide
Efficiency
See Ordering Guide
Isolation Voltage
750Vdc, minimum
Isolation Capacitance
500pF
Current Limiting
Continuous, auto-recovery
Overvoltage Protection
Zener/transorb clamps, magnetic fdbk.
Dynamic Characteristics
Transient Response
(50% load step)
300sec max. to 3% of final value
Switching Frequency
125kHz (10%)
Environmental
Operating Temperature
(ambient):
Without Derating
25 to +50C (Model dependent)
With Derating
to +95C
Maximum Baseplate Temperature
+95C
Storage Temperature
40 to +105C
Physical
Dimensions
2" x 3" x 0.5" (50.8 x 76.2 x 12.7mm)
Shielding
6-sided
Case Connection
Pin 4
Case Material
Bright tin-plated steel
Baseplate Material
Aluminum
Pin Material
Brass, solder coated
Weight
4 ounces (113 grams)
These converters require a minimum 10% loading on their primary output and 20% loading
on each auxiliary output to maintain specified regulation. Operation under no-load conditions
will not damage these devices; however they may not meet all listed specifications.
"Full load" varies by part number and is determined by the input voltage range as indicated by
the part number suffix. See Technical Notes and Output Power Considerations.
Application-specific input/output filtering can be recommended or perhaps added internally
upon request. Contact DATEL Applications Engineering for details.
Applying a voltage to the On/Off Control pin when no input power is applied to the converter
can cause permanent damage to the converter. If desired, the On/Off Control function can be
replaced with a Sync function. See page 6 of this data sheet for more details.
Filtering and Noise Reduction
All TPB 25-40 Watt DC/DC Converters achieve their rated ripple and noise
specifications without the use of external input/output capacitors. In critical
applications, input/output ripple and noise may be further reduced by
installing electrolytic capacitors across the input terminals and/or low-ESR
tantalum or electrolytic capacitors across the output terminals. Output
capacitors should be connected between their respective output pin (pin 6, 7
or 9) and Common (pin 8). The caps should be located as close to the
power converters as possible. See Figure 7. Typical values are listed in the
tables below. In many applications, using values greater than those listed
will yield better results.
To Reduce Input Ripple
Q12, D24 Models
47F, 50V
Q48, D48 Models
10F, 100V
To Reduce Output Ripple
+5V Output
47F, 10V, Low ESR
12/15V Outputs
22F, 20V, Low ESR
In critical, space-sensitive applications, DATEL may be able to tailor the
internal input/output filtering of these devices to meet your specific require-
ments. 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. For DATEL TPB
DC/DC Converters, you should use slow-blow type fuses with values no
greater than the following:
V
IN
Range
Fuse Value
Q12
4A
D24
4A
Q48
3A
D48
2A
Input Voltage:
Q12/D24 Models
44 Volts
Q48/D48 Models
88 Volts
Input Reverse-Polarity Protection
Current must be <6A. Brief
duration only. Fusing recommended.
Output Overvoltage Protection
+5V Output
6.8 Volts, limited duration
12V Outputs
15 Volts, limited duration
15V Outputs
18 Volts, limited duration
Output Current
Current limited. Max. current and
short-circuit duration are model
dependent.
Storage Temperature
40 to +105C
Lead Temperature
(soldering, 10 sec.)
+300C
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.
Absolute Maximum Ratings
T E C H N I C A L N O T E S
2 5 - 4 0 W , T R I P L E O U T P U T D C / D C C O N V E R T E R S
XPB Series
4
Temperature Derating and Electrical Performance Curves
Q12 Models (25 Watts)
Ou
t
p
u
t
Po
we
r
(
W
a
t
t
s
)
Ambient Temperature (C)
25
20
15
10
5
0
25 0 25 30 35 40
45
50 55 60 65 70 75 80 85 90 95
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Ou
t
p
u
t
Po
we
r
(
W
a
t
t
s
)
Ambient Temperature (C)
25
20
15
10
5
0
25 0 25 30 35 40
45
50 55 60 65 70 75 80 85 90 95
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Figure 2a. Temperature Derating Without Heat Sink
Figure 2b. Temperature Derating With Heat Sink
O
u
tp
u
t
P
o
w
e
r (W
a
t
ts
)
Ambient Temperature (C)
30
25
20
15
10
5
0
25 0 25 30 35 40
45
50 55 60 65 70 75 80 85 90 95
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
O
u
tp
u
t
P
o
w
e
r (W
a
t
ts
)
Ambient Temperature (C)
25 0 25 30 35 40
45
50 55 60 65 70 75 80 85 90 95
30
25
20
15
10
5
0
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Figure 3a. Temperature Derating Without Heat Sink
Figure 3b. Temperature Derating With Heat Sink
Q48 Models (30 Watts)
O
u
tp
u
t
P
o
w
e
r (W
a
t
ts
)
Ambient Temperature (C)
35
30
25
20
15
10
5
0
25 0 25 30 35 40
45
50 55 60 65 70 75 80 85 90 95
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
O
u
tp
u
t
P
o
w
e
r (W
a
t
ts
)
Ambient Temperature (C)
35
30
25
20
15
10
5
0
25 0 25 30 35 40
45
50 55 60 65 70 75 80 85 90 95
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Figure 4a. Temperature Derating Without Heat Sink
Figure 4b. Temperature Derating With Heat Sink
D24 Models (35 Watts)
TPB Models
2 5 - 4 0 W , T R I P L E O U T P U T D C / D C C O N V E R T E R S
5
40
35
30
25
20
15
10
5
0
Ou
t
p
u
t
Po
we
r
(
W
a
t
t
s
)
Ambient Temperature (C)
25 0 25 30 35 40
45
50 55 60 65 70 75 80 85 90 95
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Figure 5a. Temperature Derating Without Heat Sink
Figure 5b. Temperature Derating With Heat Sink
D48 Models (40 Watts)
O
u
tp
u
t
P
o
w
e
r (W
a
t
ts
)
Ambient Temperature (C)
40
35
30
25
20
15
10
5
0
25 0 25 30 35 40
45
50 55 60 65 70 75 80 85 90 95
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Temperature Derating and Electrical Performance Curves
Table 1. Output Currents Comprising "Full Load"
Output Power
TPB Model, triple-output DC/DC converters incorporate a design tradeoff
between total available output power and input voltage range. The total
available power is a function of both the nominal input voltage and the
"width" of the input voltage range. For a given nominal input (24V or 48V),
narrower ranges (2:1 vs. 4:1) have more available power. For a given "width"
of input range (2:1 or 4:1), higher nominal inputs (48V vs. 24V) have more
available power. Each device, as indicated by its part-number suffix (Q12,
Q48, D24, D48), has a total output power limitation of 25, 30, 35 or 40 Watts,
respectively. Observing these power limitations is the user's responsibility.
As indicated by its Part Number Structure, each TPB device is capable of
sourcing up to 5 Amps of +5V current as well as 1 Amp of auxiliary (12V
or 15V) currents. Users have the flexibility of loading any output up to these
limits; however, you must be extremely careful not to exceed the total output
power rating of any given device. If, for example, a device with a 30W power
rating is sourcing 4A from its +5V output (representing 20W of primary
output power), that device can only supply an additional 10W from its auxiliary
outputs (333mA from 15V outputs or 417mA from 12V outputs).
As a consequence of this "power-allocation" flexibility, the definition of "full
load," as the condition under which performance specifications are tested
and listed, is ambiguous. The following table lists the primary and auxiliary
output currents that DATEL uses to define each device's "full load."
Voltage
Output
Model Number
Range
Power
+5V Current
12V Currents
15V Currents
TPB-5/5-12/1-Q12
10-36V
25 Watts
2.6A (13W)
500mA (12W)
TPB-5/5-12/1-Q48
18-72V
30 Watts
3A (15W)
625mA (15W)
TPB-5/5-12/1-D24
18-36V
35 Watts
4A (20W)
625mA (15W)
TPB-5/5-12/1-D48
36-72V
40 Watts
4A (20W)
833mA (20W)
TPB-5/5-15/1-Q12
10-36V
25 Watts
2.5A (12.5W)
417mA (12.5W)
TPB-5/5-15/1-Q48
18-72V
30 Watts
3A (15W)
500mA (15W)
TPB-5/5-15/1-D24
18-36V
35 Watts
4A (20W)
500mA (15W)
TPB-5/5-15/1-D48
36-72V
40 Watts
4A (20W)
667mA (20W)
Definition of "Full Load" for Specification Purposes
2 5 - 4 0 W , T R I P L E O U T P U T D C / D C C O N V E R T E R S
XPB Series
6
On/Off Control
(Standard)
The On/Off Control pin (pin 5) may be used for remote on/off operation. As
shown in Figure 6, the control pin has an internal 10k
pull-up resistor to
approximately 10V. The converter is designed so that it is enabled when the
control pin is left open (normal mode) and disabled when the control pin is
pulled low (to less than +0.8V relative to Input, pin 2).
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 5 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 5
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
1% of its final value after the converter has been turned on.
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). TPB DC/DC Converters have been designed so that
the On/Off Control function on pin 5 can be replaced with a Sync function. 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 TPB converters configured with the
Sync function, an external clock can be applied to pin 5 of each converter.
The clock should be a TTL square wave referenced to Input (logic high =
+2 to +5 Volts, 250A max.; logic low = 0 to +0.8 Volts, 70A max.) with a
maximum 1sec "high" duration. The frequency of the synchronizing clock
should be higher than that of any individual converter. Therefore, it should be
145kHz 5kHz.
Output Trimming
The +5V output may be trimmed 5% via a single external trimpot or fixed
resistor. The trimpot should be connected as shown in Figure 7 with its wiper
connected to pin 10 (Trim). A trimpot can also be used to determine the value
of a single fixed resistor which should be connected as shown in Figure 8.
Connect the resistor between pin 10 (Trim) and pin 9 (+5V Output) to trim
"down" the output voltage. Connect the resistor between pins 10 and 8
(Common) to trim "up" the output voltage. Fixed resistors should be metal-film
types with absolute TCR's less than 100ppm/C to ensure stability.
DS-0408A 4/01
Trim Down
Trim Up
+INPUT
INPUT
TRIM
COMMON
3
2
9
8
10
LOAD
20k
9
5-10
Turns
+5V OUTPUT
Trim
Down
Trim Up
+INPUT
INPUT
+5V OUTPUT
TRIM
COMMON
3
2
9
8
10
LOAD
Figure 7. Trim Connections Using a Trimpot
Figure 8. Trim Connections Using Fixed Resistors
+INPUT
INPUT
3
2
+10V
10k
9
5
ON/OFF
CONTROL
Figure 6. Driving the On/Off Control Pin
Case Connection
Unlike most other DC/DC converters, TPB DC/DC's do not have their metal
case connected to one of their input pins. The "uncommitted" case is
connected to pin 4 which, depending on your system configuration, should be
connected to either +Input (pin 3) or Input (pin 2).
DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions
contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered DATEL,
Inc. trademark.
DATEL (UK) LTD. Tadley, England Tel: (01256)-880444
DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01
DATEL GmbH Mnchen, Germany Tel: 89-544334-0
DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-6354-2025
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
Internet: www.datel.com Email: sales@datel.com
Data Sheet Fax Back: (508) 261-2857
INNOVATION and EX C ELL E N C E
ISO-9001 REGISTERED
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