®
®
A SUBSIDIARY OF C&D TECHNOLOGIES
Triple Output
TWR Models
High-Reliability, xDSL Optimized
30 Watt, DC/DC Converters
Features
■
■
Low cost! High reliability!
Triple outputs:
3.3V @ 4A for chip sets
±12/15V @ ±625/500mA for line drivers
Two independent control loops
18-36V or 36-75V input voltage range
85% efficiency guaranteed
Small (2" x 2") package; Standard pinout
Fully isolated, 1500Vdc guaranteed
Fully I/O protected; Thermal shutdown
–40 to +65°C operation without derating
UL1950/EN60950 (basic insulation)
approvals pending
Qual tested; HALT tested; EMC tested
Modifications and customs for OEM’s
■
■
■
■
■
■
■
■
■
■
Offering an outstanding combination of price, reliability, efficiency (typically 87%),
and size (standard 2" x 2" package and pinout), DATEL’s new TWR Model 30W
Triple-Output DC/DC’s bring new levels of cost-effectiveness and flexibility to design-
ers of central-office xDSL line cards and DSLAM’s. Operating from either 48V (36-
75V range) or 24V (18-36V range) inputs, TWR triples provide a 3.3V primary output
(up to 4A) for driving xDSL chip sets and DSP’s and either ±12V (@ ±625mA) or
±15V (@ ±500mA) auxiliary outputs for powering high-current, wide-bandwidth line
drivers/receivers
Unlike traditional triple-output designs which have both their primary and auxil-
iary outputs regulated by a single control loop, TWR 30W triples are essentially two
converters in one. Their unipolar 3.3V and bipolar ±12/15V converters each have
their own, independent, control loops. The unipolar 3.3V device exploits contem-
porary full synchronous-rectification techniques, and the bipolar device uses a
traditional forward architecture. These devices are fully input (overvoltage lockout,
undervoltage lockout, reverse-polarity protection) and output (current limiting, short-
circuit protection, overvoltage protection, thermal shutdown) protected to safeguard
both the power converter and its load.
For your next-generation, high-throughput, long-reach, xDSL challenge, consider
a complete, highly integrated power solution from DATEL. Its versatility and cost-
effectiveness may better enable your product to prevail in the rapidly changing,
multi-service, xDSL marketplace. Safety approvals (UL1950/EN60950, basic insula-
tion), qual testing, and EMI compliance (EMC) testing are in progress.
+V
IN
+3.3V OUTPUT
SWITCH
CONTROL
–V
IN
OUTPUT
RETURN/COMMON
INPUT
UNDERVOLTAGE
AND OVERVOLTAGE
COMPARATORS
ON/OFF CONTROL
OR OPTIONAL SYNC
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
+12/15V OUTPUT
–12/15V OUTPUT
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
TWR Series
3 0 W, T R I P L E O U T P U T D C / D C C O N V E RT E R S
Performance Specifications and Ordering Guide
➀
Output
V
OUT
Volts
3.3
±12
3.3
±12
3.3
±15
3.3
±15
I
OUT
(mA)
4000
±625
4000
±625
4000
±500
4000
±500
R/N (mvp-p)
➁
Typ.
50
75
50
75
50
75
50
75
Max.
100
120
100
120
100
150
100
150
Regulation (Max.)
Line
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
Load
➂
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
V
IN
Nom.
(Volts)
24
48
24
48
Input
Range
(Volts)
18-36
36-75
18-36
36-75
I
IN
➃
(mA)
50/977
50/489
50/991
50/496
Efficiency
Min.
85%
85%
85%
85%
Typ.
87%
87%
87%
87%
Package
(Case/
Pinout)
C22/P31
C22/P31
C22/P31
C22/P31
Model
TWR-3.3/4000-12/625-D24
TWR-3.3/4000-12/625-D48
TWR-3.3/4000-15/500-D24
TWR-3.3/4000-15/500-D48
➀
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions unless otherwise noted. "Full load" is defined as 4 Amps on the 3.3V output
and ±625/500mA on the ±12/15V outputs. This corresponds to a total output power of approximately 28 Watts.
➁
Ripple/Noise (R/N) measured over a 20MHz bandwidth. All units are specified with no extenal I/O capacitors.
Output noise may be further reduced with the installation of external output capacitors. See I/OFiltering and Noise Reduction for details.
➂
For the +3.3V output, the listed spec applies over the 10% to 100% load range. For the ±12V/15V outputs, the listed spec applies for balanced loads
over the 10% to 100% load range. See Note 2 on the next page.
➃
Nominal line voltage, no-load/full-load conditions.
PART NUMBER STRUCTURE
MECHANICAL SPECIFICATIONS
T WR
-
3.3
/
4000
-
15
/
500
-
D48
Output
Configuration:
T
= Triple
Wide Range Input
Nominal Primary Output
Voltage (+3.3 Volts)
Maximum Primary Output
Current in mA
Input Voltage Range:
D24
=
18-36 Volts
(24V nominal)
D48
=
36-75 Volts
(48V nominal)
Maximum Auxiliary Output
Currents in mA from each output
Nominal Auxiliary Output
Voltages (±12 or ±15 Volts)
½½½½½½½
½½½½½½
½½½½½½
½½½½½½
½½½½½½½½½½½½
½½½½
½½½½½½½
Case C22
½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½
½½½½½½½
½½½½½½½
½½½½½½
½½½½½½
½½½½½½½½
½½½½½½½½½½½½
½½½½½½½½
½½½½½½
½
TEMPERATURE DERATING
30
28
26
24
22
½½½½½½½
½½½½½½
½½½½½½½
½½½½½½½
½
½
½
½
½½½½½½½
½½½½½½½
½½½½½½½½½½½
½½½½½½½½½½½½½
½½½½½½
½½½½½½
½
½
½½½½½½
½½½½½½½
½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
Output Power (Watts)
20
18
16
14
12
10
8
6
4
2
0
–40
I/O Connections
Pin
1
2
3
4
5
6
7
8
Function P31
+Input
–Input
No Pin
On/Off Control*
+12V/15V Out
+3.3V Out
Common
–12V/15V Out
* The On/Off Control can be pro-
vided with either positive (standard)
or negative polarity. It can also be
replaced with an optional Sync
function. Contact DATEL for details.
0
40
45
50
55
60
65
70
75
80
85
90
95
100
Ambient Temperature (
°
C)
2
3 0 W, T R I P L E O U T P U T D C / D C C O N V E RT E R S
TWR Series
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
➀➁
Input
Input Voltage Range:
"D24" Models
"D48" Models
Overvoltage Shutdown:
"D24" Models
"D48" Models
Start-Up Threshold:
➂
"D24" Models
"D48" Models
Undervoltage Shutdown:
➂
"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 4)
➃
V
OUT
Accuracy
(50% load):
➄
3.3V Output
±12/15V Outputs
Temperature Coefficient
Ripple/Noise
(20MHz BW)
➀ ➅
Line/Load Regulation
Efficiency
Isolation Voltage:
Input-to-Output
Input-to-Case
Output-to-Case
Isolation Capacitance
Isolation Resistance
Current-Limit Inception Point:
➆
3.3V Output
±12V Outputs
±15V Outputs
Short-Circuit Current:
➆
3.3V Output
±12V Outputs
±15V Outputs
Overvoltage Protection
Transient Response (50% load step)
Start-Up Time:
➇
V
IN
to V
OUT
On/Off to V
OUT
Switching Frequency
18-36 Volts (24V nominal)
36-75 Volts (48V nominal)
38 Volts
79 Volts
17 Volts
35 Volts
16.5 Volts
34.5 Volts
See Ordering Guide
5mA
Pi
Brief duration, 10A maximum
Brief duration, 10A maximum
TTL high (or open) = on, low = off
Environmental
Operating Temperature
(Ambient):
Without Derating
With Derating
Case Temperature:
Maximum Allowable
Thermal Protection/Shutdown
Storage Temperature
Dimensions
Shielding
Case Material
Pin Material
Weight
–40 to +65°C
to +100°C (See Derating Curves)
+100°C
+105°C typ., +110°C max. case temp.
–40 to +105°C
Physical
2" x 2" x 0.48" (51 x 51 x 12.19mm)
None
Diallyl phthalate, UL94V-0 rated
Brass, solder coated
TBD ounces (TBD grams)
Output
±1.5%, maximum
±2%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1500Vdc, minimum
Plastic Case
Plastic Case
600pF
100MΩ
5.4 Amps
1 Amp
1 Amp
TBD mA
TBD mA
TBD mA
Zener/transorb clamp, magnetic feedback
➀
All units are specified with no external I/O capacitors. "Full load" is defined as 4 Amps
on the primary 3.3V output and ±625/500mA on the auxiliary ±12/15V outputs. This
corresponds to a total output power of approximately 28 Watts.
➁
In order to properly regulate, these converters require no minimum load on their 3.3V
output (though a minimum 10% loading is recommended) and a minimum 10% load on their
±12/15V outputs. Operation under no-load conditions will not damage these devices,
however they may not meet all listed specifications. In particular, output ripple/noise may
increase.
➂
See Startup Threshold and Undervoltage Shutdown for details.
➃
See On/Off Control for details. The On/Off Control is available with negative polarity, and it
can also be replaced with an optional Sync function. Contact DATEL for details.
➄
50% load is defined as 2 Amps on the 3.3V output and ±300/250mA on the ±12/15V outputs.
➅
Output noise may be further reduced with the installation of external output capacitors.
See I/O Filtering and Noise Reduction for details.
➆
See Output Current Limiting and Short-Circuit Protection for details.
➇
See Start-Up Time for details.
Absolute Maximum Ratings
Input Voltage:
Continuous:
"D24" Models
"D48" Models
Transient (100msec):
"D24" Models
"D48" Models
Input Reverse-Polarity Protection
Output Overvoltage Protection:
3.3V Output
Between +12V and –12V Outputs
Between +15V and –15V Outputs
Output Current
44 Volts
88 Volts
50 Volts
100 Volts
Current must be <10 Amps. Brief
duration only. Fusing recommended.
3.6 Volts, unlimited duration
30 Volts, unlimited duration
35 Volts, unlimited duration
Current limited. Devices can
withstand sustained output short
circuits without damage.
+100°C
–40 to +105°C
+300°C
Dynamic Characteristics
300µsec max. to ±2% of final value
50msec
30msec
350kHz (+25/–50kHz)
Case Temperature
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.
3
TWR Series
3 0 W, T R I P L E O U T P U T D C / D C C O N V E RT E R S
TECHNICAL NOTES
Start-Up Threshold and Undervoltage Shutdown
Under normal start-up conditions, TWR 30W triples will not begin to regulate
until the ramping input voltage exceeds the Start-Up Threshold Voltage
(typically 17V for "D24" models and 35V for "D48" models). Once operating,
devices will not turn off until the input voltage drops below the Undervoltage
Shutdown/Lockout limit (typically 16.5V for "D24" models and 34.5V 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
indeterminate on/off conditions at a single voltage.
Start-Up Time
For all models in the TWR 30W Series, V
IN
to V
OUT
Start-Up Time is the
interval between the time at which a rapidly ramping input voltage crosses
the turn-on threshold point and the fully loaded output voltages enter and
remain within their specified accuracy bands. 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 is turned off via
the On/Off Control with the nominal input voltage already applied to the con-
verter. The specification defines the interval between the time at which the
converter is turned on and the fully loaded output voltages enter and remain
within their specified accuracy bands.
On/Off Control
The On/Off Control pin (pin 4) may be used for remote on/off operation.
TWR 30W Series converters are designed so that they are enabled when the
control pin is pulled high or 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 appropriate
current when activated and withstand appropriate voltage when deactivated.
Applying an external voltage to pin 4 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
4 pulled low) while input power is ramping up and then "released" once the
input has stabilized. The time duration between the point at which the con-
verter is released and its fully loaded output voltage settles to within specified
accuracy can be found in the Performance/Functional Specifications Table.
I/O Filtering and Noise Reduction
All models in the TWR 30W Series achieve their rated ripple and noise
specifications without the use of external input/output capacitors. In critical
applications, input/output ripple/noise may be further reduced by install-
ing additional external I/O caps. Input capacitors, which function primarily
as energy-storage elements, should be selected for bulk capacitance, low
ESR and high rms-ripple-current ratings. Output capacitors, which function
more as true filter elements, should be selected for bulk capacitance, low
ESR, and appropriate frequency response. All caps should have appropri-
ate voltage ratings and be mounted as close to the converters as possible.
Temperature variations for all parameters should obviously be taken into
consideration.
The most effective combination of external I/O capacitors will be a function of
your line voltage and source impedance, as well as 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 TWR 30W DC/DC Converters, you should use
slow-blow type fuses with values no greater than the following.
Model Number
TWR-3.3/4000-12/625-D24
TWR-3.3/4000-12/625-D48
TWR-3.3/4000-15/500-D24
TWR-3.3/4000-15/500-D48
Fuse Value
4 Amps
2 Amps
4 Amps
2 Amps
4
3 0 W, T R I P L E O U T P U T D C / D C C O N V E RT E R S
TWR Series
Typical Performance Curves
½½½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
½½
½½
½½½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
½½
½½
½
½½½
½½½½½
½½
½½½½½½½½½½½½½½
½½
½
½½½
½½½½½
½½½½½½½½½½½½½½
½
½½½
½½½½½
½½
½
½½½
½½½½½
½½
½
½½½
½½½½½
½½
½
½½½
½½½½½
½½
½
½½½
½½½½½
½½
½½
½
½½½
½½½½½
½½
½½½½½½½½
½½½½½
½½½½½
½½½½½
½½½½½
½½½½½
½½½½½
½½½½½
½½½½
½½½½½
½½½½
½½
½½½½½½½½
½½½½½
½½½½½
½½½½½
½½½½½
½½½½½
½½½½½
½½½½½
½½½½
½½½½½
½½½½
½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½
®
®
DATEL (UK) LTD.
Tadley, England Tel: (01256)-880444
Internet: www.datel-europe.com E-mail: datel.ltd@datel.com
DATEL S.A.R.L.
Montigny Le Bretonneux, France Tel: 01-34-60-01-01
Internet: www.datel-europe.com E-mail: datel.sarl@datel.com
DATEL GmbH
München, Germany Tel: 89-544334-0
Internet: www.datel-europe.com E-mail: datel.gmbh@datel.com
DATEL KK
Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-6354-2025
Internet: www.datel.co.jp Email: salestko@datel.co.jp, salesosa@datel.co.jp
DATEL China
Shanghai, China Tel: 011-86-51317131
E-mail: davidx@datel.com
A SUBSIDIARY OF C&D TECHNOLOGIES
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.datel.com
Email: sales@datel.com
www.cdpowerelectronics.com
ISO 9001 REGISTERED
DS-04448
04/05
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.
5
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