Data Sheet
Sept 16, 2003
Document No: DS03-075 ver 0.4
PDF name: qpw050-60a_series.ds.pdf
QPW050/060A Series Power Modules; dc-dc Converters
36-75 Vdc Input; 1.2Vdc to 3.3Vdc Output; 50A/60A
* UL is a registered trademark of Underwriters Laboratories, Inc.
† CSA is a registered trademark of Canadian Standards Association.
‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
§ This product is intended for integration into end-user equipment. All the required procedures for CE marking of end-user equipment should be followed. (The CE mark is
placed on selected products.)
** ISO is a registered trademark of the International Organization of Standards
Applications
Distributed power architectures
Wireless Networks
Access and Optical Network Equipment
Enterprise Networks
Latest generation IC’s (DSP, FPGA, ASIC) and
Microprocessor powered applications.
Options
Positive Remote On/Off logic
Case ground pin (-H Baseplate option)
Auto restart after fault shutdown
Basic Insulation Approved (-B Suffix)
Features
Delivers up to 60A output current
3.3V (50A), 2.5V – 1.2V (60A each)
High efficiency – 93% at 3.3V full load
Improved Thermal Performance:
30A at 70ºC at 1m/s (200LFM) for 3.3Vo
High power density: 119 W/in3
Low Output Voltage – supports migration to future
IC supply voltages down to 1.0V
Low output ripple and noise
Industry standard Quarter brick:
57.9 mm x 36.8 mm x 10.6 mm
(2.28 in x 1.45 in x 0.42 in)
Cost efficient open frame design
Single tightly regulated output
Remote sense
2 : 1 input voltage range
Constant switching frequency
Negative Remote On/Off logic
Output over current/voltage protection
Overtemperature protection
Output voltage adjustment (±10%)
Wide operating temperature range (-40°C to 85°C)
ISO** 9001 certified manufacturing facilities
Meets the voltage insulation requirements for
ETSI 300-132-2 and complies with and is licensed
for Basic Insulation rating per EN60950-1
UL* 60950 Recognised, CSA† C22.2 No. 60950-00
Certified, and EN 60950 (VDE‡ 0805): 2001-12
Licensed
CE mark meets 73/23/EEC and 93/68/EEC
directives§
Description
The QPW-series dc-dc converters are a new generation of DC/DC power modules designed for
maximum efficiency and power density. The QPW series provide up to 60A output current in an industry
standard quarter brick, which makes it an ideal choice for small space, high current and low voltage
applications. The converter incorporates synchronous rectification technology and innovative packaging
techniques to achieve ultra high efficiency reaching 93% at 3.3V full load. The ultra high efficiency of this
converter leads to lower power dissipation such that for most applications a heat sink is not required. The
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QPW series power modules are isolated dc-dc converters that operate over a wide input voltage range of
36 to 75 Vdc and provide single precisely regulated output. The output is fully isolated from the input,
allowing versatile polarity configurations and grounding connections. Built-in filtering for both input and
output minimizes the need for external filtering.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect the device reliability.
Parameter Device Symbol Min Max Unit
Input Voltage
Continuous VIN -0.3 80 Vdc
Transient (100ms) VIN, trans -0.3 100 Vdc
Operating Ambient Temperature All TA -40 85 °C
(See Thermal Considerations section)
Storage Temperature All Tstg -55 125 °C
I/O Isolation Voltage All 1500 Vdc
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter Device Symbol Min Typ Max Unit
Operating Input Voltage VIN 36 48 75 Vdc
Maximum Input Current IIN,max 6 Adc
(VIN=0V to 75V, IO=IO, max)
Inrush Transient All I2t 1 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12µH source impedance; VIN=0V to
75V, IO= IOmax ; see Figure 31)
All 7 mAp-p
Input Ripple Rejection (120Hz) All 50 dB
Fusing Considerations
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to an
integrated part of a sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included;
however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies
require a time-delay fuse with a maximum rating of 15A (see Safety Considerations section). Based on the
information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a
lower rating can be used. Refer to the fuse manufacturer’s data sheet for further information.
Data Sheet
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Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point
(VIN=VIN,nom, IO=IO, max, Ta =25°C)
3.3V
2.5V
1.8V
1.5V
1.2V
VO, set
3.24
2.45
1.77
1.47
1.18
3.30
2.25
1.80
1.50
1.20
3.36
2.55
1.83
1.53
1.22
Vdc
Output Voltage
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
3.3V
2.5V
1.8V
1.5V
1.2V
VO
3.20
2.42
1.74
1.44
1.16
3.40
2.57
1.86
1.56
1.24
Vdc
Output Regulation
Line (VIN=VIN, min to VIN, max) All
0.05 0.2 %Vo
Load (IO=IO, min to IO, max) All
0.05 0.2 %Vo
Temperature (TA = -40ºC to +85ºC) All 15 50 mV
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max)
RMS (5Hz to 20MHz bandwidth) All __ 30 mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth) All __ 100 mVpk-pk
External Capacitance All CO, max µF
Output Current 3.3V Io 0 50 Adc
2.5V –
1.2V Io 0 60 Adc
Output Current Limit Inception 3.3V IO, lim 58 Adc
2.5V –
1.2V IO, lim 69 Adc
Output Short-Circuit Current Latch-off
(VO250mV)
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Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Efficiency
VIN=VIN, nom, TA=25°C
IO=IO, max , VO= VO,set
3.3V
2.5V
1.8V
1.5V
1.2V
__
__
__
__
93
91
89
87
85
__
__
__
__
%
%
%
%
%
Switching Frequency fsw 300 kHz
Dynamic Load Response
(∆Io/∆t=1A/10µs; Vin=Vin,nom; TA=25°C; Tested
with a 10 µF aluminum and a 1.0 µF tantalum
capacitor across the load.)
Load Change from Io= 50% to 75% of Io,max:
Peak Deviation
Settling Time (Vo<10% peak deviation)
All Vpk
ts
__
4
200
__
%VO, set
µs
Load Change from Io= 75% to 50% of Io,max:
Peak Deviation V
pk __ 4 __ %VO, set
Settling Time (Vo<10% peak deviation) ts 200 µs
Isolation Specifications
Parameter Symbol Min Typ Max Unit
Isolation Capacitance Ciso 2700 pF
Isolation Resistance Riso 10 M
General Specifications
Parameter Device Min Typ Max Unit
Calculated MTBF (IO=80% of IO, max, TA=40°C,
airflow=1m/s(200LFM)) All 1,204,000
Hours
Weight 42 (1.48) g (oz.)
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Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Parameter Device Symbol Min Typ Max Unit
Remote On/Off Signal Interface
(VIN=VIN, min to VIN, max ; open collector or equivalent,
Signal referenced to VIN- terminal)
Negative Logic: device code suffix “1”
Logic Low = module On, Logic High = module Off
Positive Logic: No device code suffix required
Logic Low = module Off, Logic High = module On
Logic Low Specification
Remote On/Off Current – Logic Low All Ion/off 0.15 1.0 mA
On/Off Voltage:
Logic Low All Von/off 0.0 1.2 V
Logic High – (Typ = Open Collector) All Von/off __ 15 V
Logic High maximum allowable leakage current All Ion/off 50 µA
Turn-On Delay and Rise Times
(IO=IO, max)
Tdelay 2.5 ms
3.3V Trise 12 ms
Tdelay = Time until VO = 10% of VO,set from either
application of Vin with Remote On/Off set to On or
operation of Remote On/Off from Off to On with Vin
already applied for at least one second.
Tdelay 2.5 ms
Trise = time for VO to rise from 10% of VO,set to 90%
of VO,set.
2.5V – 1.2V
Trise 1.5 ms
Output Voltage Adjustment
(See Feature Descriptions):
Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim)
Vsense
__
90
__
__
10
110
%Vo,nom
%Vo,nom
Output Overvoltage Protection 3.3V VO, limit 4.0 4.9 V
2.5V
3.0 3.4 V
1.8V
2.1 2.4 V
1.5V
1.8 2.2 V
1.2V
1.5 1.8 V
Overtemperature Protection All Tref 110 °C
(See Feature Descriptions)
Input Undervoltage Lockout VIN, UVLO
Turn-on Threshold 34.5 36 V
Turn-off Threshold 30 32
V
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Characteristic Curves
The following figures provide typical characteristics for the QPW050A0F (3.3V, 50A) at 25ºC. The figures are identical
for either positive or negative Remote On/Off logic.
INPUT CURRENT, Ii (A)
INPUT VOLTAGE, VO (V)
On/Off VOLTAGE OUTPUT VOLTAGE
VON/OFF(V) (5V/div) VO (V) (2V/div)
TIME, t (5 ms/div)
Figure 1. Typical Input Characteristic at Room
Temperature
Figure 4. Typical Start-Up Using Remote On/Off,
negative logic version shown.
EFFCIENCY, (%)
OUTPUT CURRENT, IO (A)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (10A/div) VO (V) (100mV/div)
TIME, t (100 µs/div)
Figure 2. Typical Converter Efficiency Vs. Output
current at Room Temperature
Figure 5. Typical Transient Response to Step
Decrease in Load from 50% to 25% of
Full Load at Room Temperature and 48
Vdc Input.
OUTPUT VOLTAGE,
VO (V) (50mV/div)
TIME, t (1µs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (10A/div) VO (V) (100mV/div)
TIME, t (100 µs/div)
Figure 3. Typical Output Ripple and Noise at Room
Temperature and Io = Io,max
Figure 6. Typical Transient Response to Step Increase
in Load from 50% to 75% of Full Load at Room
Temperature and 48 Vdc Input
36 Vin
48 Vin
75 Vin
0
1
2
3
4
5
6
25 35 45 55 65 75
Io = 0 A
Io = 25 A
Io = 50 A
80
82
84
86
88
90
92
94
0 1020304050
Vi = 36 V
Vi = 48 V
Vi = 75 V
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Characteristic Curves (continued)
The following figures provide typical characteristics for the QPW060A0G (2.5V, 60A) at 25ºC. The figures are
identical for either positive or negative Remote On/Off logic.
INPUT CURRENT, Ii (A)
INPUT VOLTAGE, VO (V)
On/Off VOLTAGE OUTPUT VOLTAGE
VON/OFF(V) (5V/div) VO (V) (1 V/div)
TIME, t (2.5 ms/div)
Figure 7. Typical Input Characteristic at Room
Temperature
Figure 10. Typical Start-Up Using Remote On/Off,
negative logic version shown.
EFFCIENCY, (%)
OUTPUT CURRENT, IO (A)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (10A/div) VO (V) (50mV/div)
TIME, t (500 µs/div)
Figure 8. Typical Converter Efficiency Vs. Output
current at Room Temperature
Figure 11. Typical Transient Response to Step
Decrease in Load from 50% to 25% of
Full Load at Room Temperature and 48
Vdc Input.
OUTPUT VOLTAGE,
VO (V) (50mV/div)
TIME, t (2.5 µs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (10A/div) VO (V) (50mV/div)
TIME, t (500 µs/div)
Figure 9. Typical Output Ripple and Noise at Room
Temperature and Io = Io,max
Figure 12. Typical Transient Response to Step
Increase in Load from 50% to 75% of Full Load at
Room Temperature and 48 Vdc Input
84
86
88
90
92
94
5 1015202530354045505560
Vi = 36 V
Vi = 48 V
Vi = 75 V
0
1
2
3
4
5
6
25 35 45 55 65 75
Io = 60A
Io = 0 A
Io = 30 A
36 Vin
48 Vin
75 Vin
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Characteristic Curves (continued)
The following figures provide typical characteristics for the QPW060A0Y (1.8V, 60A) at 25ºC. The figures are
identical for either positive or negative Remote On/Off logic.
INPUT CURRENT, Ii (A)
INPUT VOLTAGE, VO (V)
On/Off VOLTAGE OUTPUT VOLTAGE
VON/OFF(V) (5V/div) VO (V) (0.5 V/div)
TIME, t (2.5 ms/div)
Figure 13. Typical Input Characteristic at Room
Temperature
Figure 16. Typical Start-Up Using Remote On/Off,
negative logic version shown.
EFFCIENCY, (%)
OUTPUT CURRENT, IO (A)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (10A/div) VO (V) (50mV/div)
TIME, t (500 µs/div)
Figure 14. Typical Converter Efficiency Vs. Output
current at Room Temperature
Figure 17. Typical Transient Response to Step
Decrease in Load from 50% to 25% of
Full Load at Room Temperature and 48
Vdc Input.
OUTPUT VOLTAGE,
VO (V) (20mV/div)
TIME, t (2.5 µs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (10A/div) VO (V) (50mV/div)
TIME, t (500 µs/div)
Figure 15. Typical Output Ripple and Noise at Room
Temperature and Io = Io,max
Figure 18. Typical Transient Response to Step
Increase in Load from 50% to 75% of Full Load at
Room Temperature and 48 Vdc Input
81
83
85
87
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5 1015202530354045505560
Vi = 36 V
Vi = 48 V
Vi = 75 V
0
0.5
1
1.5
2
2.5
3
3.5
4
25 35 45 55 65 75
Io = 0 A
Io = 30 A
Io = 60 A
36 Vin
48 Vin
75 Vin
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Characteristic Curves (continued)
The following figures provide typical characteristics for the QPW060A0M (1.5V, 60A) at 25ºC. The figures are
identical for either positive or negative Remote On/Off logic.
INPUT CURRENT, Ii (A)
INPUT VOLTAGE, VO (V)
On/Off VOLTAGE OUTPUT VOLTAGE
VON/OFF(V) (5V/div) VO (V) (0.5 V/div)
TIME, t (2.5 ms/div)
Figure 19. Typical Input Characteristic at Room
Temperature
Figure 22. Typical Start-Up Using Remote On/Off,
negative logic version shown.
EFFCIENCY, (%)
OUTPUT CURRENT, IO (A)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (10A/div) VO (V) (50mV/div)
TIME, t (500 µs/div)
Figure 20. Typical Converter Efficiency Vs. Output
current at Room Temperature
Figure 23. Typical Transient Response to Step
Decrease in Load from 50% to 25% of
Full Load at Room Temperature and 48
Vdc Input.
OUTPUT VOLTAGE,
VO (V) (20mV/div)
TIME, t (2.5 µs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (10A/div) VO (V) (50mV/div)
TIME, t (500 µs/div)
Figure 21. Typical Output Ripple and Noise at Room
Temperature and Io = Io,max
Figure 24. Typical Transient Response to Step
Increase in Load from 50% to 75% of Full Load at
Room Temperature and 48 Vdc Input
81
83
85
87
89
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5 1015202530354045505560
Vi = 36 V
Vi = 75 V
Vi = 48 V
0
0.5
1
1.5
2
2.5
3
3.5
25 35 45 55 65 75
Io = 0 A
Io = 30 A
Io = 60 A
36 Vin
48 Vin
75 Vin
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Characteristic Curves (continued)
The following figures provide typical characteristics for the QPW060A0P (1.2V, 60A) at 25ºC. The figures are
identical for either positive or negative Remote On/Off logic.
INPUT CURRENT, Ii (A)
INPUT VOLTAGE, VO (V)
On/Off VOLTAGE OUTPUT VOLTAGE
VON/OFF(V) (5V/div) VO (V) (0.5 V/div)
TIME, t (2.5 ms/div)
Figure 25. Typical Input Characteristic at Room
Temperature
Figure 28. Typical Start-Up Using Remote On/Off,
negative logic version shown.
EFFCIENCY, (%)
OUTPUT CURRENT, IO (A)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (10A/div) VO (V) (50mV/div)
TIME, t (500 µs/div)
Figure 26. Typical Converter Efficiency Vs. Output
current at Room Temperature
Figure 29. Typical Transient Response to Step
Decrease in Load from 50% to 25% of
Full Load at Room Temperature and 48
Vdc Input.
OUTPUT VOLTAGE,
VO (V) (20mV/div)
TIME, t (2.5 µs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (10A/div) VO (V) (50mV/div)
TIME, t (500 µs/div)
Figure 27. Typical Output Ripple and Noise at Room
Temperature and Io = Io,max
Figure 30. Typical Transient Response to Step
Increase in Load from 50% to 75% of Full Load at
Room Temperature and 48 Vdc Input
36 Vin
48 Vin
75 Vin
80
81
82
83
84
85
86
87
88
89
90
5 1015202530354045505560
Vi = 36 V
Vi = 48 V
Vi = 75 V
0
0.5
1
1.5
2
2.5
3
25 35 45 55 65 75
Io = 0 A
Io = 30 A
Io = 60 A
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Characteristic Curves (continued)
Test Configurations
Note: Measure input reflected-ripple current with a simulated
source inductance (LTEST) of 12 µH. Capacitor CS offsets
possible battery impedance. Measure current as shown above.
Figure 31. Input Reflected Ripple Current Test Setup
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or
tantalum capacitor. Scope measurement should be made
using a BNC socket. Position the load between
51 mm and 76 mm (2 in. and 3 in.) from the module.
Figure 32. Output Ripple and Noise Test Setup
Note: All measurements are taken at the module terminals.
When socketing, place Kelvin connections at module terminals
to avoid measurement errors due to socket contact resistance.
Figure 33. Output Voltage and Efficiency Test Setup
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance source. A highly inductive source
impedance can affect the stability of the power module.
For the test configuration in Figure 31, a 100µF
electrolytic capacitor (ESR<0.7Ω at 100kHz), mounted
close to the power module helps ensure the stability of
the unit. Consult the factory for further application
guidelines.
Output Capacitance
High output current transient rate of change (high
di/dt) loads may require high values of output
capacitance to supply the instantaneous energy
requirement to the load. To minimize the output
voltage transient drop during this transient, low
E.S.R. (equivalent series resistance) capacitors
may be required, since a high E.S.R. will produce a
correspondingly higher voltage drop during the
current transient.
Output capacitance and load impedance interact
with the power module’s output voltage regulation
control system and may produce an ’unstable’
output condition for the required values of
capacitance and E.S.R.. Minimum and maximum
values of output capacitance and of the capacitor’s
associated E.S.R. may be dictated, depending on
the module’s control system.
The process of determining the acceptable values
of capacitance and E.S.R. is complex and is load-
dependant. Tyco provides Web-based tools to
assist the power module end-user in appraising
and adjusting the effect of various load conditions
and output capacitances on specific power
modules for various load conditions.
Safety Considerations
For safety-agency approval of the system in which the
power module is used, the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standard, i.e.,
UL 1950, CSA C22.2 No. 60950-00, and VDE
0805:2001-12 (IEC60950 3rd Ed).
If the input source is non-SELV (ELV or a hazardous
voltage greater than 60 Vdc and less than or equal to
75Vdc), for the module’s output to be considered as
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meeting the requirements for safety extra-low voltage
(SELV), all of the following must be true:
The input source is to be provided with reinforced
insulation from any other hazardous voltages,
including the ac mains.
One VIN pin and one VOUT pin are to be grounded, or
both the input and output pins are to be kept
floating.
The input pins of the module are not operator
accessible.
Another SELV reliability test is conducted on the
whole system (combination of supply source and
subject module), as required by the safety agencies,
to verify that under a single fault, hazardous
voltages do not appear at the module’s output.
Note: Do not ground either of the input pins of the
module without grounding one of the output pins.
This may allow a non-SELV voltage to appear
between the output pins and ground.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
For input voltages exceeding –60 Vdc but less than or
equal to –75 Vdc, these converters have been evaluated
to the applicable requirements of BASIC INSULATION
between secondary DC MAINS DISTRIBUTION input
(classified as TNV-2 in Europe) and unearthed SELV
outputs (-B option only).
The input to these units is to be provided with a
maximum 15A fast-acting (or time-delay) fuse in the
unearthed lead.
Feature Descriptions
Overcurrent Protection
To provide protection in a fault output overload condition,
the module is equipped with internal current-limiting
circuitry and can endure current limit for few seconds. If
overcurrent persists for few seconds, the module will
shut down and remain latch-off. The overcurrent latch is
reset by either cycling the input power or by toggling the
on/off pin for one second. If the output overload condition
still exists when the module restarts, it will shut down
again. This operation will continue indefinitely until the
overcurrent condition is corrected.
An auto-restart option is also available.
Remote On/Off
Two remote on/off options are available. Positive
logic remote on/off turns the module on during a
logic-high voltage on the ON/OFF pin, and off
during a logic low. Negative logic remote on/off
turns the module off during a logic high and on
during a logic low. Negative logic, device code
suffix "1," is the factory-preferred configuration. To
turn the power module on and off, the user must
supply a switch to control the voltage between the
on/off terminal and the VI (-) terminal (Von/off). The
switch can be an open collector or equivalent (see
Figure 34). A logic low is Von/off = 0 V to I.2 V. The
maximum Ion/off during a logic low is 1 mA. The
switch should maintain a logic-low voltage while
sinking 1 mA. During a logic high, the maximum
Von/off generated by the power module is 15 V.
The maximum allowable leakage current of the
switch at Von/off = 15V is 50 µA. If not using the
remote on/off feature, perform one of the following
to turn the unit on:
For negative logic, short ON/OFF pin to VI(-).
For positive logic: leave ON/OFF pin open.
Figure 34. Remote On/Off Implementation
Remote sense
Remote sense minimizes the effects of distribution
losses by regulating the voltage at the remote-sense
connections. The voltage between the remote-sense
pins and the output terminals must not exceed the output
voltage sense range given in the Feature Specifications
table i.e.:
[Vo(+) – Vo(-)] – [SENSE(+) – SENSE(-)] ≤ 10% of Vo,nom.
The voltage between the Vo(+) and Vo(-) terminals must
not exceed the minimum output overvoltage shut-down
value indicated in the Feature Specifications table. This
limit includes any increase in voltage due to remote-
sense compensation and output voltage set-point
adjustment (trim). See Figure 35. If not using the
remote-sense feature to regulate the output at the point
of load, then connect SENSE(+) to Vo(+) and SENSE(-)
to Vo(-) at the module.
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum increase
for the output voltage is not the sum of both. The
maximum increase is the larger of either the remote
sense or the trim. The amount of power delivered by the
module is defined as the voltage at the output terminals
multiplied by the output current. When using remote
sense and trim: the output voltage of the module can be
Data Sheet
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Tyco Electronics Power Systems 13
increased, which at the same output current would
increase the power output of the module. Care should be
taken to ensure that the maximum output power of the
module remains at or below the maximum rated power.
Figure 35. Effective Circuit Configuration for Single-
Module Remote-Sense Operation Output Voltage
Output Voltage Set-Point Adjustment
(Trim)
Trimming allows the user to increase or decrease
the output voltage set point of a module. This is
accomplished by connecting an external resistor
between the TRIM pin and either the SENSE(+) or
SENSE(-) pins. The trim resistor should be
positioned close to the module.
If not using the trim feature, leave the TRIM pin
open.
With an external resistor between the TRIM and
SENSE(-) pins (Radj-down), the output voltage set
point (Vo,adj) decreases (see Figure 36). The
following equation determines the required
external-resistor value to obtain a percentage
output voltage change of ∆%.
For output voltages: 1.5V – 3.3V
Ω
−
∆
=−KR downadj 2.10
%
510
For output voltage: 1.2V
Ω
−
∆
=−KR downadj 49.33
%
1.1299
Where,
100%
,
,×
−
=∆
nomo
desirednomo
V
VV
Vdesired = Desired output voltage set point (V).
With an external resistor connected between the
TRIM and SENSE(+) pins (Radj-up), the output
voltage set point (Vo,adj) increases (see Figure 37).
The following equation determines the required
external-resistor value to obtain a percentage
output voltage change of ∆%.
For output voltages: 1.5V – 3.3V
(
)
Ω
−
∆
−
∆
∆+
=
−K
V
Rnomo
upadj 2.10
%
510
%*225.1
%100**1.5 ,
For output voltage: 1.2V
()
Ω
−
∆
−
∆
∆+
=
−K
V
Rnomo
upadj 49.33
%
1.1299
%*6.0
%100**769.9 ,
Where,
100%
,
,×
−
=∆
nomo
nomodesired
V
VV
Vdesired = Desired output voltage set point (V).
The voltage between the Vo(+) and Vo(-) terminals
must not exceed the minimum output overvoltage
shut-down value indicated in the Feature
Specifications table. This limit includes any
increase in voltage due to remote-sense
compensation and output voltage set-point
adjustment (trim). See Figure 35.
Although the output voltage can be increased by
both the remote sense and by the trim, the
maximum increase for the output voltage is not the
sum of both. The maximum increase is the larger
of either the remote sense or the trim.
The amount of power delivered by the module is
defined as the voltage at the output terminals
multiplied by the output current. When using
remote sense and trim, the output voltage of the
module can be increased, which at the same
output current would increase the power output of
the module. Care should be taken to ensure that
the maximum output power of the module remains
at or below the maximum rated power.
QPW050/060A Series Power Modules; dc-dc Converters
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Data Sheet
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14 Tyco Electronics Power Systems
Figure 36. Circuit Configuration to Decrease Output
Voltage
Figure 37. Circuit Configuration to Increase Output
Voltage
Examples:
To trim down the output of a nominal 3.3V module
(QPW050A0F) to 3.1V
100
3.3
1.33.3
%×
−
=∆ V
VV
% = 6.06
Ω
−=−KR downadj 2.10
06.6
510
Radj-down = 73.96 kΩ
To trim up the output of a nominal 3.3V module
(QPW050A0F) to 3.6V
100
3.3
3.36.3
%×
−
=∆ V
VV
% = 9.1
()
Ω
−−
+
=−KR upadj 2.10
1.9
510
1.9*225.1
1.9100*3.3*1.5
Rtadj-up = 98.47kΩ
Output Overvoltage Protection
The output overvoltage protection consists of
circuitry that monitors the voltage on the output
terminals. If the voltage on the output terminals
exceeds the over voltage protection threshold, then
the module will shutdown and latch off. The
overvoltage latch is reset by either cycling the input
power for one second or by toggling the on/off
signal for one second. The protection mechanism
is such that the unit can continue in this condition
until the fault is cleared.
Overtemperature Protection
These modules feature an overtemperature
protection circuit to safeguard against thermal
damage. The circuit shuts down and latches off the
module when the maximum device reference
temperature is exceeded. The module can be
restarted by cycling the dc input power for at least
one second or by toggling the remote on/off signal
for at least one second.
Input Undervoltage Lockout
At input voltages below the input undervoltage
lockout limit, the module operation is disabled. The
module will begin to operate at an input voltage
above the undervoltage lockout turn-on threshold.
Data Sheet
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Tyco Electronics Power Systems 15
Feature Descriptions (continued)
Thermal Considerations
The power modules operate in a variety of thermal
environments; however, sufficient cooling should be
provided to help ensure reliable operation.
Considerations include ambient temperature, airflow,
module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of the
module will result in an increase in reliability. The
thermal data presented here is based on physical
measurements taken in a wind tunnel.
Heat-dissipating components are mounted on the top
side of the module. Heat is removed by conduction,
convection and radiation to the surrounding environment.
Proper cooling can be verified by measuring the thermal
reference temperature (Tref ). Peak temperature (Tref )
occurs at the position indicated in Figures 38 - 40. For
reliable operation this temperature should not exceed
listed temperature threshold.
Figure 38. Tref Temperature Measurement
Location for Vo=3.3V – 2.5V
Figure 39. Tref Temperature Measurement
Location for Vo= 1.8V
Figure 40. Tref Temperature Measurement
Location for Vo= 1.5V – 1.2V
The output power of the module should not exceed the
rated power for the module as listed in the Ordering
Information table.
Although the maximum Tref temperature of the power
modules is 110 °C - 115 °C, you can limit this
temperature to a lower value for extremely high
reliability.
Heat Transfer via Convection
Increased airflow over the module enhances the heat
transfer via convection. Following derating figures
shows the maximum output current that can be delivered
by each module in the respective orientation without
exceeding the maximum Tref temperature versus local
ambient temperature (TA) for natural convection through
2m/s (400 ft./min).
Note that the natural convection condition was
measured at 0.05 m/s to 0.1 m/s (10ft./min. to 20
ft./min.); however, systems in which these power
modules may be used typically generate natural
convection airflow rates of 0.3 m/s (60 ft./min.) due
to other heat dissipating components in the
system. The use of Figures 41 - 50 are shown in
the following example:
Example
What is the minimum airflow necessary for a
QPW050A0F operating at VI = 48 V, an output current of
30A, and a maximum ambient temperature of 70 °C in
longitudinal orientation.
Solution:
Given: VI = 48V
Io = 30A
TA = 70 °C
Determine airflow (V) (Use Figure 41):
Tref =110ºC
Tref =110ºC
Tref =115ºC
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16 Tyco Electronics Power Systems
V = 1m/sec. (200ft./min.)
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 41. Output Power Derating for QPW050A0F
(Vo = 3.3V) in Longitudinal Orientation with no
baseplate; Airflow Direction From Vin(–) to Vout(--);
Vin = 48V
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 42. Output Power Derating for QPW050A0F
(Vo = 3.3V) in Transverse Orientation with no
baseplate; Airflow Direction From Vin(–) to Vin(+);
Vin = 48V
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 43. Output Power Derating for QPW060A0G
(Vo = 2.5V) in Longitudinal Orientation with no
baseplate; Airflow Direction From Vin(–) to Vout(--);
Vin = 48V
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 44. Output Power Derating for QPW060A0G
(Vo = 2.5V) in Transverse Orientation with no
baseplate; Airflow Direction From Vin(–) to Vin(+);
Vin = 48V
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 45. Output Power Derating for QPW060A0Y
(Vo = 1.8V) in Longitudinal Orientation with no
baseplate; Airflow Direction From Vin(–) to Vout(--);
Vin = 48V
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 46. Output Power Derating for QPW060A0Y
(Vo = 1.8V) in Transverse Orientation with no
baseplate; Airflow Direction From Vin(–) to Vin(+);
Vin = 48V
0
10
20
30
40
50
60
25 30 35 40 45 50 55 60 65 70 75 80 85
NATURAL
CONVECTION
1.0 m/s (200 ft/min)
2.0 m/s (400 ft/min)
0
10
20
30
40
50
60
25 30 35 40 45 50 55 60 65 70 75 80 85
NATURAL
CONVECTION
1.0 m/s (200 ft./min.)
2.0 m/s
(
400 ft./min.
)
0
10
20
30
40
50
60
25 30 35 40 45 50 55 60 65 70 75 80 85
NATURAL
CONVECTION
1.0 m/s
(
200 ft./min.
)
2.0 m/s (400 ft./min.)
0
10
20
30
40
50
60
25 30 35 40 45 50 55 60 65 70 75 80 8
5
NATURAL
CONVECTION
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
0
5
10
15
20
25
30
35
40
45
50
25 30 35 40 45 50 55 60 65 70 75 80 85
NATURAL CONVECTION
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
0
10
20
30
40
50
25 30 35 40 45 50 55 60 65 70 75 80 85
NATURAL CONVECTION
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
Data Sheet
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Tyco Electronics Power Systems 17
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 47. Output Power Derating for QPW060A0M
(Vo = 1.5V) in Longitudinal Orientation with no
baseplate; Airflow Direction From Vin(–) to Vout(--);
Vin = 48V
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 48. Output Power Derating for QPW060A0M
(Vo = 1.5V) in Transverse Orientation with no
baseplate; Airflow Direction From Vin(–) to Vin(+);
Vin = 48V
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 49. Output Power Derating for QPW060A0P
(Vo = 1.2V) in Longitudinal Orientation with no
baseplate; Airflow Direction From Vin(–) to Vout(--);
Vin = 48V
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 50. Output Power Derating for QPW060A0P
(Vo = 1.2V) in Transverse Orientation with no
baseplate; Airflow Direction From Vin(–) to Vin(+);
Vin = 48V
Layout Considerations
The QPW power module series are low profile in order to
be used in fine pitch system card architectures. As such,
component clearance between the bottom of the power
module and the mounting board is limited. Avoid placing
copper areas on the outer layer directly underneath the
power module. Also avoid placing via interconnects
underneath the power module.
For additional layout guide-lines, refer to FLTR100V10
data sheet.
Post Solder Cleaning and Drying
Considerations
Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The
result of inadequate cleaning and drying can affect both
the reliability of a power module and the testability of the
finished circuit-board assembly. For guidance on
appropriate soldering, cleaning and drying procedures,
refer to Tyco Electronics Board Mounted Power
Modules: Soldering and Cleaning Application Note
(AP01-056EPS).
0
10
20
30
40
50
60
25 30 35 40 45 50 55 60 65 70 75 80 85
NATURAL
CONVECTION
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
0
10
20
30
40
50
60
25 30 35 40 45 50 55 60 65 70 75 80 85
NATURAL CONVECTION
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
0
10
20
30
40
50
60
25 30 35 40 45 50 55 60 65 70 75 80 85
NATURAL CONVECTION
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
0
10
20
30
40
50
60
25 30 35 40 45 50 55 60 65 70 75 80 85
NATURAL CONVECTION
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
QPW050/060A Series Power Modules; dc-dc Converters
36
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75 Vdc In
p
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p
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Data Sheet
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18 Tyco Electronics Power Systems
Mechanical Outline for QPW Through-hole Module
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm ( x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm ( x.xxx in ± 0.010 in.)
TOP VIEW
SIDE VIEW
BOTTOM VIEW
57.9
(2.28)
36.8
(1.45)
4.6
(.18) MIN
1.57 (.062) DIA SOLDER PLATED SHOULDER, 8 PLCS
1.02 (.040) DIA SOLDER PLATED PIN, 8 PLCS
.33 (.013) MIN SEATING
PLANE
10.6
(.42)
2.36 (.093) DIA SOLDER PLATED
PIN SHOULDER, 2 PLCS
1.57 (.062) DIA SOLDER
PLATED PIN, 2 PLCS
50.80
(2.000)
Vo (-)
- SENSE
TRIM
+ SENSE
Vo (+)
3.81
(.150)
7.62
(.300)
11.43
(.450)
15.24
(.600)
VI(-)
VI (+)
†
†
ON/OFF
3.6
(.14)
10.8
(.43)
CASE
*Top side label includes Tyco name, product designation, and data code.
†Option Feature, Pin is not present unless one these options specified.
Data Sheet
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Tyco Electronics Power Systems 19
Recommended Pad Layout for Through-Hole Modules
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm ( x.xx in. ± 0.02 in.) [unless otherwise indicated ]
x.xx mm ± 0.25 mm ( x.xxx in ± 0.010 in.)
50.80
(2.000)
Vo (+)
+ SENSE
TRIM
- SENSE
Vo (-)
3.81
(.150)
7.62
(.300)
11.43
(.450)
15.24
(.600)
VI(+)
VI (-)
†
†
ON/OFF
3.6
(.14)
10.8
(.43)
57.9
(2.28)
36.8
(1.45)
1.02 (.040) DIA PIN, 8 PLCS
1.57 (.062) DIA PIN, 2 PLCS
CASE
QPW050/060A Series Power Modules; dc-dc Converters
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20 Tyco Electronics Power Systems
Ordering Information
Please contact your Tyco Electronics’ Sales Representative for pricing, availability and optional features.
Table 1. Device Codes
Input Voltage Output
Voltage
Output
Current
Efficiency Connector
Type Product codes Comcodes
48V (36-75Vdc) 3.3V 50A 93% Through hole QPW050A0F1 108968686
48V (36-75Vdc) 2.5V 60A 91% Through hole QPW060A0G1 108982232
48V (36-75Vdc) 1.8V 60A 89% Through hole QPW060A0Y1 108982265
48V (36-75Vdc) 1.5V 60A 87% Through hole QPW060A0M1 108982240
48V (36-75Vdc) 1.2V 60A 85% Through hole QPW060A0P1 108982257
Table 2. Device Options
Option Suffix
Negative remote on/off logic 1
Auto-restart 4
Pin Length: 3.68 mm ± 0.25mm
(0.145 in. ± 0.010 in.)
6
Case pin (only available with –H option) 7
Base Plate option -H
Basic Insulation -B
Data Sheet
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World Wide Headquarters
Tyco Electronics Power Systems, Inc.
3000 Skyline Drive, Mesquite, TX 75149, USA
+1-800-843-1797
(Outside U.S.A.: +1-972-284-2626)
www.power.tycoelectronics.com
e-mail: techsupport1@tycoelectronics.com
Europe, Middle-East and Africa Headquarters
Tyco Electronics (UK) Ltd
Tel: +44 (0) 1344 469 300
Latin America, Brazil, C aribbean Headquarters
Tyco Electronics Power Systems
Tel: +56 2 209 8211
India Headquarters
Tyco Electronics Systems India Pte. Ltd.
Tel: +91 80 841 1633 x3001
Asia-Pacific Headquarters
Tyco Electronics Singapore Pte. Ltd.
Tel: +65 6416 4283
Tyco Electronics Corporation reserves the right to make changes to the product(s) or information contained herein without notice.
No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such
product(s) or information.
© 2003 Tyco Electronics Power Systems, Inc., (Mesquite, Texas) All International Rights Reserved.
Document No: DS03-075 ver 0.4
PDF name: qpw050-60a_series.ds.pdf
