Technical
S pecification
DQ62412QKA02
48V in
Input
2.45/1.225V
20 Watt
Power
2000Vdc
Isolation
Quar ter-brick
DC/DC Conver ter
Outputs
The DQ62412QKA02 DualQor
™
Kilo series is a dual out -
put converter that uses the industry standard quarter brick
package size. The very high efficiency is a result of
SynQor’s patented topology that uses synchronous rectifica -
tion and an innovative construction design to minimize heat
dissipation and allow extremely high power densities. The
power dissipated by the converter is so low that a heatsink
is not required, which saves cost, weight, height, and appli -
cation effort. All of the power and control components are
mounted to the multi-layer PCB substrate with high-yield sur -
face mount technology, resulting in a more reliable product.
The Kilo series offers ample power output in an economical
package.
Operational Features
• High efficiency, > 85% at full rated load current
• Delivers up to 20 Watts of output power with no derat-
ing - no heatsink required
• Wide input voltage range: 35V – 75V, with 100V
100ms input voltage transient capability
• Fixed frequency switching provides predictable EMI per-
formance
• No minimum load requirement means no preload resis-
tors required
Dual Output
DQ62412QKA02 Module
Pr otection Features
• Input under-voltage lockout disables converter at low
input voltage conditions
• Output current limit and short circuit protection protects
converter and load from permanent damage and conse-
quent hazardous conditions
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection protects load from dam-
aging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Mechanical Features
• Industry standard pin-out configuration
• Industry standard size: 1.45” x 2.3” (36.8x58.4mm)
• Total height less than 0.422” (10.72mm), permits better
airflow and smaller card pitch
• Total weight: 1.5 oz. (43 g)
• Flanged pins designed to permit surface mount solder-
ing (avoid wave solder) using FPiP technique
Safety Features
• 2000V, 30 MΩ input-to-output isolation provides
input/output ground separation
• UL/cUL 60950 recognized (US & Canada), basic insu-
lation rating
• TUV certified to EN60950
• Meets 72/23/EEC and 93/68/EEC directives which
facilitates CE Marking in user’s end product
• Board and plastic components meet UL94V-0 flammabil-
ity requirements
Contr ol Features
• On/Off control referenced to input side (positive and
negative logic options are available)
• Output voltage trim: +10%/-10%, permits custom volt-
ages and voltage margining
Product # DQ62412QKA02
Phone 1-888-567-9596
Doc.# 005-2DQ245L Rev. A
06/08/05
Page 1
Technical Specification
MECHANICAL
DIAGRAM
0.38
(9.7)
Input:
Outputs:
Current:
Package:
2.30
(58.4)
35-75V
2.45V & 1.225V
20W
Quarter-brick
2.00
(50.8)
0.500
(12.7)
0.225
0.14
(3.6)
(5.71)
0.025
(.64)
0.700
(17.78)
0.725 1.45
(18.41) (36.8)
Top View
0.350
(8.89)
0.422
(10.72)
Bottom side
Clearance
See Note 8
Side View
Lowest
Component
Load Board
Flanged Pin
See Note 9
0.047+/-0.015
(1.19+/-0.38)
0.180
(4.57)
See Note 2
NOTES
1) All pins are 0.040” (1.02mm) diameter with 0.080” (2.03
mm) diameter standoff shoulders.
2) Other pin extension lengths available. Recommended pin
length is 0.03” (0.76mm) greater than the PCB thickness.
3) All Pins: Material - Copper Alloy
Finish - Tin/Lead over Nickel plate
4) Undimensioned components are shown for visual reference
only.
5) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
6) Weight: 1.5 oz. (43 g) typical
7) Workmanship: Meets or exceeds IPC-A-610C Class II
8)
UL/TUV standards require a clearance greater than 0.04”
(1.02mm) between input and output for Basic insulation. This issue
should be considered if any copper traces are on the top side of
the user’s board. Note that the ferrite cores are considered part of
the input/primary circuit.
PIN DESIGNATIONS
Pin No.
1
2
3
4
5
6
7
Name
Vin(+)
ON/OFF
Vin(-)
1.225Vout(+)
Function
Positive input voltage
TTL input to turn converter
on and off, referenced to
Vin(-), with internal pull up.
Negative input voltage
1.225V positive output voltage
Output Return
Output voltage trim
2.45V positive output voltage
OP RTN
TRIM
2.45Vout(+)
9) The flanged pins are designed to permit surface mount
soldering (avoiding the wave soldering process) through
the use of the flanged pin-in-paste technique.
Product # DQ62412QKA02
Phone 1-888-567-9596
Doc.# 005-2DQ245L Rev. A
06/08/05
Page 2
Technical Specification
DQ62412QKA02 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Input:
Outputs:
Current:
Package:
35-75V
2.45V & 1.225V
20W
Quarter-brick
T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient
temperature with appropriate power derating. Specifications subject to change without notice.
Min.
Typ.
Max.
100
80
100
2000
100
125
18
48
33
29.5
3.5
40
2
150
4
30
2.2\4.7
47
1.225
2.45
75
34
30.5
4.5
0.8
5
0.01
Units
V
V
V
V
°C
°C
V
V
V
V
V
A
mA
mA
A
2
s
mV
mA
mA
A
µF\µH
µF
V
V
V
V
mV
mV
A
A
A
A
A
A
V
A
A
µF
µF
dB
mV
mV
µs
Notes & Conditions
Continuous
Continuous
100ms transient, square wave
Basic insulation, Pollution Degree 2
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage (input to output)
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Input Filter Component Values (C\L)
Recommended External Input Capacitance
-40
-55
-2
35
32
28.5
2.5
INPUT CHARACTERISTICS
100% Load, 35 Vin
20
1000V/ms input transient
RMS thru 10µH inductor; Figures 23 & 25
RMS; Figures 23 & 24
Fast blow external fuse recommended
Internal values, see Figure E
Typical ESR 0.1-0.2
Ω
, see Figure 23
48Vin, 50% load on each voltage
48Vin, 50% load on each voltage
Cross regulation, line, load, temp; Figures 7 - 10
Cross regulation, line, load, temp; Figures 7 - 10
20MHz bandwidth; Figures 23 & 26
Full Load, see Figures 23 & 26
Full Load, see Figures 23 & 26
Subject to thermal derating; Figures 11 - 18
Subject to thermal derating; Figures 11 - 18
Output Voltage 10% Low; Figures 27 - 28
Output Voltage 10% Low; Figures 27 - 28
Figures 29-30
Figures 29-30
Negative current drawn from output
Negative current drawn from output
20W load; 5% overshoot at Vout at startup
20W load; 5% overshoot at Vout at startup
120 Hz; Figs. 33-34
50% to 75% to 50% Iout max; Figure 21
50% to 75% to 50% Iout max; Figure 22
To within 1% Vout nom
Full load, Vout=90% nom.; Figures 19 & 20
-40°C to +125°C; Figure F
20mF load capacitance, Iout = 0A
48Vin, 50% load each Vout; Figures 1 - 6
48Vin, 25% load each Vout; Figures 1 - 6
Package rated to 150°C
UL rated max operating temp 165°C
See Figures 11 - 18 for derating curves
OUTPUT CHARACTERISTICS
Output Voltage Set Point (1.225V)
Output Voltage Set Point (2.45V)
Total Output Voltage Regulation (1.225V)
Total Output Voltage Regulation (2.45V)
Output Voltage Ripple and Noise (1.225V & 2.45V)
1
Peak-to-Peak
RMS
Operating Output Current Range (1.225V)
Operating Output Current Range (2.45V)
Output DC Current-Limit Inception (1.225V)
Output DC Current-Limit Inception (2.45V)
Short-Circuit Protection
- redundant shutdown (1.225V)
Short-Circuit Protection -
redundant shutdown (2.45V)
Output DC Current-Limit Shutdown
(1.225\2.45V)
Back-Drive Current Limit while Enabled
(1.225V only)
Back-Drive Current Limit while Disabled
(1.225V only)
Maximum Output Capacitance (1.225V) -
50/50 split
Maximum Output Capacitance (2.45V) -
50/50 split
1.17
2.35
1.27
2.70
100
20
16
8
20.8
10.4
0
0
17.6
8.8
50
10
19.2
9.6
25.6
12.8
0.8\1.6
0.5
2
2,000
2,000
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
(1.225\2.45V)
Output Voltage during Load Current Transient
Settling Time
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
Output Voltage Overshoot
For a Step Change in 1.225V Output Current (.1A/µs)
For a Step Change in 2.45V Output Current (.1A/µs)
85\85
50
50
400
180
10
200
0
85
82.5
125
125
125
2000
30
3300
15
240
ms
ms
%
%
%
°C
°C
°C
V
M
Ω
pF
EFFICIENCY
100% Load (20W)
50% Load (10W)
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance
2
TEMPERATURE LIMITS FOR POWER DERATING CURVES
ISOLATION CHARACTERISTICS
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com).
Note 2: Higher values of isolation capacitance can be added external to the module.
Product # DQ62412QKA02
Phone 1-888-567-9596
Doc.# 005-2DQ245L Rev. A
06/08/05
Page 3
Technical Specification
ELECTRICAL CHARACTERISTICS (Continued)
Parameter
P
FEATURE CHARACTERISTICS
Input:
Outputs:
Current:
Package:
35-75V
2.45V & 1.225V
20W
Quarter-brick
Min.
Typ.
285
142.5
Max.
Units
kHz
kHz
Notes & Conditions
Regulation Stage Switching Frequency
Isolation Stage Switching Frequency
ON/OFF Control (Option P)
Off-State Voltage
On-State Voltage
ON/OFF Control (Option N)
Off-State Voltage
On-State Voltage
ON/OFF Control (Either Option)
Pull-Up Voltage
Pull-Up Resistance
Output Voltage Trim Range
Output Over-Voltage Protection (1.225V)
Output Over-Voltage Protection (2.45V)
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor (2.45V rail)
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
-2
2.4
2.4
-2
Vin/6
40
1.46
2.93
120
10
270
TBD
2.5
0.8
18
18
0.8
10
+10
125
V
V
V
V
V
kΩ
%
V
V
°C
°C
Figures A & B
Trim-up pins 6-5, Trim-down pins 6-4; Figure C
Over full temp range
Over full temp range
Average PCB Temperature
-10
115
See App Note: Output Load Current Calc.
RELIABILITY CHARACTERISTICS
10
6
Hrs.
TR-NWT-000332; 80% load,300LFM, 40oC Ta
10
6
Hrs.
MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
10
6
Hrs. See website for latest values
STANDARDS COMPLIANCE
Parameter
P
STANDARDS COMPLIANCE
Notes
File # E194341, Basic insulation & pollution degree 2
Certified by TUV
Test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
Section 7 - electrical safety, Section 9 - bonding/grounding
UL/cUL 60950
EN60950
72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
GR-1089-CORE
Telcordia (Bellcore) GR-513
• An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety
certificates on new releases or download from the SynQor website.
QUALIFICATION TESTING
Parameter
P
QUALIFICATION TESTING
# Units
32
5
5
10
5
5
5
15 pins
Test Conditions
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
95% rated V
in
and load, units at derating point, 1000 hours
100g minimum, 2 drops in x and y axis, 1 drop in z axis
-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles
T
operating
= min to max, V
in
= min to max, full load, 100 cycles
T
min
-10°C to T
max
+10°C, 5°C steps, V
in
= min to max, 0-105% load
85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off
MIL-STD-883, method 2003
•
Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply
robust, reliable product. Contact factory for official product family qualification documents.
OPTIONS
SynQor provides various options for Logic Sense, Pin Length and
Feature Set for this family of DC/DC converters. Please consult the
last page of this specification sheet for information on available
options.
Product # DQ62412QKA02
Phone 1-888-567-9596
PATENTS
SynQor is protected under various patents, including but not lim-
ited to U.S. Patent numbers 5,999,417; 6,222,742 B1;
6,594,159 B2; 6,545,890 B2.
Doc.# 005-2DQ245L Rev. A
06/08/05
Page 4
Technical Specification
95
5
90
Power Dissipation (W)
Efficiency (%)
85
80
75
70
65
60
0
4
8
12
16
20
Total Output Power (W)
35V
48V
75V
4
3
2
1
0
0
4
Input:
Outputs:
Current:
Package:
35-75V
2.45V & 1.225V
20W
Quarter-brick
35V
48V
75V
8
12
16
20
Total Output Power (W)
Figure 1:
Efficiency vs. output power, from 0 load to full load with 50%
load on 1.225V output and 50% load on 2.45V output at minimum, nom-
inal, and maximum input voltage at 25
°
C.
100
95
90
Efficiency (%)
85
80
75
70
65
16/0
35 V
48 V
75 V
12.8/1.6
9.6/3.2
6.4/4.8
3.2/6.4
0/8
Figure 2:
Power dissipation vs. output power, from 0 load to full load
with 50% load on 1.225V output and 50% load on 2.45V output at mini-
mum, nominal, and maximum input voltage at 25
°
C.
6.0
5.0
Power Dissipation (W)
4.0
3.0
2.0
1.0
0.0
16/0
35 V
48 V
75 V
12.8/1.6
9.6/3.2
6.4/4.8
3.2/6.4
0/8
Load Current (A), 1.225Vout/2.45Vout
Load Current (A), 1.225Vout/2.45Vout
Figure 3:
Efficiency vs. load current, with total output power fixed at
100% (20W) and load current split as shown between 1.225V and 2.45V
outputs at minimum, nominal, and maximum input voltage at 25
°
C.
Figure 4:
Power dissipation vs. load current, with total output power
fixed at 100% (20W) and load current split as shown between 1.225V
and 2.45V outputs at minimum, nominal, and max input voltage at 25
°
C.
84
4
83
Efficiency (%)
Power Dissipation (W)
3
82
2
81
25 C
40 C
55 C
100
200
Air Flow (LFM)
300
400
1
25 C
40 C
55 C
100
200
Air Flow (LFM)
300
400
80
0
Figure 5:
Efficiency at 60% load and 50/50 power split (4.5A load on
1.225V and 2.5A load on 2.45V) versus airflow rate for ambient air tem-
peratures of 25
°
C, 40
°
C.and 55
°
C.(nominal input voltage).
Product # DQ62412QKA02
Phone 1-888-567-9596
Figure 6:
Power dissipation at 60% load and 50/50 power split (4.5A
load on 1.225V and 2.5A load on 2.45V) versus airflow rate for ambient
air temperatures of 25
°
C, 40
°
C.and 55
°
C.(nominal input voltage).
Doc.# 005-2DQ245L Rev. A
06/08/05
Page 5
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