77W

Technical Specification
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
Dual Output, High Efficiency, Isolated DC/DC Converter
The DQ63318QGL08 DualQor™ series is an independently regulated dual output converter that uses the
industry standard quarter brick package size. The very
high efficiency is a result of SynQor’s patented topology
Dual Output
that uses synchronous rectification 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 application effort. All of the power and control components
are mounted to the multi-layer PCB substrate with highyield surface mount technology, resulting in a more reliable product.
DQ63318QGL08 Module
Operational Features
• Independently regulated outputs (separate control loops)
• High efficiency, >87% at full rated load current
• Delivers up to 77 Watts of output power with minimal
derating - no heatsink required
• Wide input voltage range: 35V – 75V, with 100V
100ms input voltage transient withstand
• Fixed frequency switching provides predictable EMI
performance
• No minimum load requirement means no preload resistors required
• Input under-voltage lockout disables converter at
low input voltage conditions
• Output current limit and short circuit protection
protects converter from excessive load current or
short circuits
• Output over-voltage protection protects load from
damaging voltages
• Thermal shutdown protects converter from abnormal environmental conditions
Safety Features
Mechanical Features
• Industry standard pin-out configuration
• Industry standard size: 1.45” x 2.3”
• Low profile of only 0.34”, permits better airflow and
smaller card pitch
• Total weight: 1.1 oz (31 g), lower mass reduces
vibration and shock problems
Control Features
• On/Off control referenced to input side (positive
and negative logic options are available)
• Output voltage trim: +10%/-10%, permits custom
voltages and voltage margining. Optional second trim pin allows independent trimming.
Product # DQ63318QGL08
Protection Features
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• 2000V, 30 MΩ input-to-output isolation provides
input/output ground separation
• UL/cUL 60950 recognized (US & Canada), basic
insulation 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 flammability requirements
Doc.# 005-2DQ638D Rev. B
10/7/03
Page 1
Technical Specification
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
0.500
(12.7)
MECHANICAL
DIAGRAM
0.375
2.30
(58.4)
0.375
0.250
(9.53)
(9.53)
(6.35)
2.00
0.350
(50.8)
(8.89)
0.350
(8.89)
0.750
Top View
(19.05)
1.450
(36.83)
0.700
(17.78)
Pin far side
typical
Side View
0.340 +.014
(8.64 +0.36)
Bottom side
Clearance
0.019+/-0.013
QGA Option
0.424 (10.77)
max height
See Note 8
Lowest
Component
(0.48+/-0.33)
Load Board
0.145
(3.68)
See Note 2
QGA Option
0.076 (1.93)
min clearance
See Note 8
NOTES
PIN CONNECTIONS
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: 1.1 oz. (31 g) typical
7) Workmanship: Meets or exceeds IPC-A-610C Class II
8) Modules can be ordered as QGA option that have different
pins to provide a minimum bottom side clearance of
0.076” while increasing maximum height to 0.424”.
See ordering page for more information.
Product # DQ63318QGL08
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Pin No.
Name
Function
1
Vin(+)
Positive input voltage
2
ON/OFF
TTL input to turn converter
on and off, referenced to
Vin(-), with internal pull up.
3
Vin(-)
Negative input voltage
4
1.8Vout(+)
1.8V positive output voltage
5
OP RTN
Output Return
A
6
7
2nd TRIM
TRIM
3.3Vout(+)
2nd Output voltage trim
Output voltage trim1
3.3V positive output voltage
2
Pins in Italics Shaded text are Optional
NOTES
1. For Standard feature unit (S feature), one trim pin (pin 6) trims both outputs
simultaneously by the same amount in the same direction.
2. For units with optional trim pin (T feature), the original trim pin (pin 6)
trims the low voltage output and the optional trim pin (pin A) trims the high
voltage output. Both trim independently of one other.
Doc.# 005-2DQ638D Rev. B
10/7/03
Page 2
Technical Specification
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
DQ63318QGL08 ELECTRICAL CHARACTERISTICS
TA=25°C, airflow rate=300 LFM, Vin=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.
Parameter
Min.
Typ.
Max.
Units
100
80
100
2000
100
125
18
V
V
V
V
°C
°C
V
Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage (input to output)
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
-40
-55
-2
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Response to Input Transient
Input Reflected-Ripple Current
Recommended Input Fuse
Input Filter Component Values (L\C)
Recommended External Input Capacitance
OUTPUT CHARACTERISTICS
Output Voltage Set Point (1.8V)
Output Voltage Set Point (3.3V)
Output Voltage Regulation (1.8V)
Over Line
Over Load
Over Temperature
Total Output Voltage Regulation (3.3V)
Over Line
Over Load
Over Temperature
Total Output Voltage Range (1.8V)
Total Output Voltage Range (3.3V)
Output Voltage Ripple and Noise (1.8V & 3.3V)
Peak-to-Peak
RMS
Operating Output Current Range (1.8V)
Operating Output Current Range (3.3V)
Output DC Current-Limit Inception (1.8V)
Output DC Current-Limit Inception (3.3V)
Short-Circuit Protection - redundant shutdown (1.8V)
Short-Circuit Protection - redundant shutdown (3.3V)
Output DC Current-Limit Shutdown Voltage (1.8V)
Output DC Current-Limit Shutdown Voltage (3.3V)
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance (1.8V)
Maximum Output Capacitance (3.3V)
35
48
75
V
32
28.5
2.5
33
29.5
3.5
34
30.5
4.5
3
80
3
0.03
5
V
V
V
A
mA
mA
A 2s
mV
mA
A
µH\µF
µF
60
2
3
33
4.7\1x2
47
1.76
3.26
1.80
3.30
1.72
3.19
0
0
15.2
15.2
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection (1.8V \ 3.3V)
Output Voltage during Load Current Transient
Step Change in 1.8V Output Current (.1A/µs)
Step Change in 3.3V Output Current (.1A/µs)
Settling Time
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
Output Voltage Overshoot
180
EFFICIENCY
100% Load
50% Load
1.84
3.34
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
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V
V
+0.05 \ 2 +0.15 \ 5
+0.8 \ 15 +1.7 \ 30
+50
+30
%\mV
%\mV
mV
+0.05 \ 2 +0.15 \ 5
+0.5 \ 17 +1.0 \ 33
+70
+50
1.88
3.41
%\mV
%\mV
mV
V
V
50
10
17
17
17
17
0.6
1.0
1.0
10
100
20
15
15
19.4
19.4
10
10
mV
mV
A
A
A
A
A
A
V
V
A
mA
mF
mF
100% Load, 35 Vin
1000V/ms input transient
RMS thru 10µH inductor; Figs. 17 & 19
fast blow external fuse recommended
internal values, see Figure E
see Figure 17
48Vin, 50% load on each voltage
48Vin, 50% load on each voltage
over sample, line, load, temperature & life
over sample, line, load, temperature & life
20MHz bandwidth; Fig. 17 & 20
Full Load, see Figures 17 & 20
Full Load, see Figures 17 & 2
Output Voltage 10% Low; Figs. 21-22
Output Voltage 10% Low; Figs. 21-22
Figures 23-24
Figures 23-24
Negative current drawn from output
Negative current drawn from output
1.8V at 15A resistive load
3.3V at 15A resistive load
80\80
dB
120 Hz; Figs. 27-28
100
100
300
mV
mV
µs
50% to 75% to 50% Iout max; Figure 15
50% to 75% to 50% Iout max; Figure 16
to within 1% Vout nom
ms
ms
%
Full load, Vout=90% nom.; Figs. 13 & 14
-40°C to +125°C; Figure F
10mF load capacitance, Iout = 0A
%
%
48Vin, 100% load each Vout; Figs 1 - 6
48Vin, 50% load each Vout; Figs 1 - 6
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 7 - 12 for derating curves
6
200
0
12
215
87.5
87.5
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Product # DQ63318QGL08
20
continuous
continuous
100ms transient
Basic level, Pollution Degree 2
125
125
125
Doc.# 005-2DQ638D Rev. B
10/7/03
Page 3
Technical Specification
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
Min.
ISOLATION CHARACTERISTICS
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Typ.
Max.
2000
30
3300
FEATURE CHARACTERISTICS
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 (1.8V)
Output Over-Voltage Protection (3.3V)
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
230
Units
V
MΩ
pF
290
kHz
-2
2.4
0.8
18
V
V
2.4
-2
18
0.8
V
V
9.2
V
kΩ
%
%
%
°C
°C
-10
111
111
260
Vin/6.5
40
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Demonstrated MTBF
Notes & Conditions
+10
125
125
117
117
125
10
Figures A, B
Trim-up pins 6-5, Trim-down pins 6-4; Fig D
Over full temp range
Over full temp range
Average PCB Temperature
106 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
106 Hrs. Field demonstrated MTBF
TBD
TBD
TBD
STANDARDS COMPLIANCE
Parameter P
Notes
STANDARDS COMPLIANCE
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
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
Section 7 - electrical safety, Section 9 - bonding/grounding
• An external input fuse must always be used to meet these safety requirements
QUALIFICATION TESTING
Parameter P
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
# Units
32
5
5
10
5
5
5
15 pins
Test Conditions
95% rated Vin and load, units at derating point, 1000 hours
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
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
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10°C to Tmax+10°C, 5°C steps, Vin = 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 more information about Proof of Design and Proof of Manufacturing processes.
OPTIONS
PATENTS
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.
SynQor is protected under various patents, including but not limited to U.S. Patent # 5,999,417.
Product # DQ63318QGL08
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Doc.# 005-2DQ638D Rev. B
10/7/03
Page 4
Performance Curves
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
90
10
89
Power Dissipation (W)
9
Efficiency (%)
88
87
86
3.3Vo,
1.8Vo,
3.3Vo,
1.8Vo,
3.3Vo,
1.8Vo,
85
84
83
7
8
9
10
11
12
13
35Vin
35Vin
48Vin
48Vin
75Vin
75Vin
8
7
6
3.3Vo,
1.8Vo,
3.3Vo,
1.8Vo,
3.3Vo,
1.8Vo,
5
4
14
7
15
8
9
12
13
14
15
Figure 2: Power dissipation vs. output current, from half load to full
load on each output voltage at minimum, nominal, and maximum input
voltage at 25°C. Output not under test is held constant at half load.
100
12
11
95
85
80
75
70
35 Vin
48 Vin
65
Power Dissipation (W)
10
90
Efficiency (%)
11
Load Current (A)
Load Current (A)
Figure 1: Efficiency vs. output current, from half load to full load on
each output voltage at minimum, nominal, and maximum input voltage
at 25°C. Output not under test is held constant at half load.
9
8
7
6
5
4
3
35 Vin
48 Vin
2
1
75 Vin
60
75 Vin
0
0
10
20
30
40
50
60
70
0
10
20
Total Output Power (W)
8.0
89.5
7.5
Power Dissipation (W)
89.0
88.5
88.0
87.5
87.0
25 C
40 C
55 C
86.5
100
150
200
250
60
70
300
350
7.0
6.5
6.0
5.5
5.0
25 C
40 C
55 C
4.0
400
Airflow (LFM)
Figure 5: Overall converter efficiency at nominal output voltages and
60% rated power on each output rail vs. airflow rate for ambient temperatures of 25°C, 40°C and 55°C (nominal input voltage).
Product # DQ63318QGL08
50
4.5
86.0
50
40
Figure 4: Overall converter power dissipation vs. output power from
zero load to full load at minimum, nominal, and maximum input voltage
at 25°C. Both loads are equal and range from zero to full load.
90.0
0
30
Total Output Power (W)
Figure 3: Overall converter efficiency vs. output power from zero load
to full load at minimum, nominal, and maximum input voltage at 25°C.
Both loads are equal and range from zero to full load.
Efficiency (%)
10
35Vin
35Vin
48Vin
48Vin
75Vin
75Vin
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0
50
100
150
200
250
300
350
400
Airflow (LFM)
Figure 6: Overall converter power dissipation at nominal output voltages and 60% rated power on each output rail vs. airflow rate for
ambient temperatures of 25°C, 40°C and 55°C (nominal input voltage).
Doc.# 005-2DQ638D Rev. B
10/7/03
Page 5
Performance Curves
Quarter
1.8V, Iout (A)
Brick Dual 48Vin 3.3/1.8Vout 77W
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Semiconductor junction temperature is
within 1°C of surface temperature
3.3V, Iout (A)
1.8V, Iout (A)
Figure 7: Maximum output power derating curves at 55°C vs. airflow
rates of 100 through 400 LFM. Curve shows available current for 1.8V
rail on y axis and available current for 3.3V rail on x axis. (nom. Vin)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Figure 8: Thermal plot of converter at 15A load on 1.8V ouput and 15A
load on 3.3V output with 55°C air flowing at 200 LFM. Air flow across
the converter is from pin 1 to pin 3 (nominal input voltage).
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Semiconductor junction temperature is
within 1°C of surface temperature
3.3V, Iout (A)
1.8V, Iout (A)
Figure 9: Maximum output power derating curves at 70°C vs. airflow
rates of 100 through 400 LFM. Curve shows available current for 1.8V
rail on y axis and available current for 3.3V rail on x axis. (nom. Vin)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Figure 10: . Thermal plot of converter at 15A load on 1.8V ouput and
12.5A load on 3.3V output with 70°C air flowing at 200 LFM. Air flow
across the converter is from pin 1 to pin 3 (nominal input voltage).
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Semiconductor junction temperature is
within 1°C of surface temperature
3.3V, Iout (A)
Figure 11: Maximum output power derating curves at 85°C vs. airflow
rates of 100 through 400 LFM. Curve shows available current for 1.8V
rail on y axis and available current for 3.3V rail on x axis. (nom. Vin)
Product # DQ63318QGL08
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Figure 12: Thermal plot of converter at 13A load on 1.8V ouput and
10A load on 3.3V output with 85°C air flowing at 200 LFM. Air flow
across the converter is from pin 1 to pin 3 (nominal input voltage).
Doc.# 005-2DQ638D Rev. B
10/7/03
Page 6
Performance Curves
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 13: Turn-on transient at full rated load current (resistive load)
(10 ms/div). Ch 1: 1.8Vout (1V/div); Ch 2: 3.3Vout (1V/div)
Ch 3: ON/OFF input (5V/div)
Figure 14: Turn-on transient at zero load current (10 ms/div).
Ch 1: 1.8Vout (1V/div); Ch 2: 3.3Vout (1V/div)
Ch 3: ON/OFF input (5V/div)
1.8Vout
1.8Vout
1.8Iout
1.8Iout
3.3Vout
3.3Vout
3.3Iout
3.3Iout
Figure 15: Output voltage response to step-change in Iout1 (50%-75%-50% of
Imax; dI/dt = 0.1A/µs). Load cap: 15µF, 300 mΩ ESR tantalum & 1µF ceramic.
Vout (100mV/div), Iout (10A/div). Ch1: Vout1; Ch2 Iout1; Ch 3: Vout2; Ch 4 Iout2
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 16: Output voltage response to step-change in Iout2 (50%-75%-50% of
Imax; dI/dt = 0.1A/µs). Load cap: 15µF, 300 mΩ ESR tantalum & 1µF ceramic.
Vout (100mV/div), Iout (10A/div). Ch1: Vout1; Ch2 Iout2; Ch 3: Vout2; Ch 4 Iout2
Figure 19
10 µH
source
impedance
Figure 18
iS
VSOURCE
iC
100 µF,
<1Ω ESR
electrolytic
capacitor
Figure 20
DC/DC
Converter
VOUT2+
VOUT1+
1 µF
ceramic
capacitors
15 µF,
300mΩ ESR
tantalum
capacitors
COM (-)
Figure 17: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 18), Input Reflected Ripple Current
(Figure 19) and Output Voltage Ripple (Figure 20).
Product # DQ63318QGL08
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Semiconductor junction temperature is
within 1°C of surface temperature
Figure 18: Input Terminal Ripple Current, 1.8V & 3.3V outputs at full
rated output current and nominal input voltage with 10µH source
impedance and 100µF electrolytic capacitor (10 mA/div). (see Fig. 17)
Doc.# 005-2DQ638D Rev. B
10/7/03
Page 7
Performance Curves
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
1.8Vout
3.3Vout
Figure 19: Input Reflected Ripple Current, is, through a 10 µH source
inductor at nominal input voltage and rated load current (5 mA/div).
1.8V and 3.3V outputs at full rated load current. (see Fig. 17)
Figure 20: Output Voltage Ripple at nominal input voltage and rated
load current on both outputs (20 mV/div). Load capacitance: 1µF
ceramic & 15µF tantalum. Bandwidth: 20 MHz. (see Fig. 17)
2.5
4.0
3.5
Output Voltage (V)
Output Voltage (V)
2.0
1.5
1.0
35 V
0.5
48 V
3.0
2.5
2.0
1.5
35 V
1.0
48 V
0.5
75 V
75 V
0.0
0.0
0
5
10
15
20
Load Current (A)
0
5
10
15
20
Load Current (A)
Figure 21: Output voltage vs. load current showing typical current limit
curves and converter shutdown points for the 1.8V output. 3.3V load is
at 0A.
Figure 22: Output voltage vs. load current showing typical current limit
curves and converter shutdown points for the 3.3V output. 1.8V load is
at 0A.
Figure 23: Load current for 1.8V output (20A/div) as a function of time
when the converter attempts to turn on into a 10 mΩ short circuit.
Bottom trace is an expansion of the on-time portion of the top trace.
Figure 24: Load current for 3.3V output (20A/div) as a function of time
when the converter attempts to turn on into a 10 mΩ short circuit.
Bottom trace is an expansion of the on-time portion of the top trace.
Product # DQ63318QGL08
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Doc.# 005-2DQ638D Rev. B
10/7/03
Page 8
Performance Curves
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
0.1
35 Vin
0.01
48 Vin
75 Vin
Output Impedance (Ω )
Output Impedance (Ω )
0.1
0.001
35 Vin
0.01
48 Vin
75 Vin
0.001
10
100
1,000
10,000
100,000
10
100
1,000
10,000
100,000
Hz
Figure 25: Output impedance (Zout1 = Vout1/Iout1) for minimum,
nominal, and maximum input voltage at full rated power, for 1.8V output.
Figure 26: Output impedance (Zout2 = Vout2/Iout2) for minimum,
nominal, and maximum input voltage at full rated power, for 3.3V output.
-30
-30
-40
-40
-50
-60
-70
35 Vin
48 Vin
-80
75 Vin
-90
Forward Transmission (dB)
Forward Transmission (dB)
Hz
-100
-50
-60
-70
35 Vin
48 Vin
-80
75 Vin
-90
-100
-110
-110
10
100
1,000
10,000
100,000
10
100
Hz
10,000
100,000
Hz
Figure 27: Forward Transmission (FT1 = Vout1/Vin) for minimum,
nominal, and maximum input voltage at full rated power, for 1.8V output.
Figure 28: Forward Transmission (FT2 = Vout2/Vin) for minimum,
nominal, and maximum input voltage at full rated power, for 3.3V output.
-10
-10
-15
-20
-25
-30
35 Vin
-35
48 Vin
-40
75 Vin
-45
-50
-55
Reverse Transmission (dB)
-15
Reverse Transmission (dB)
1,000
-20
-25
-30
35 Vin
-35
48 Vin
75 Vin
-40
-45
-50
-55
-60
10
100
1,000
10,000
100,000
Hz
10
100
1,000
10,000
100,000
Hz
Figure 29: Reverse Transmission (RT1 = Iin/Iout1) for minimum, nominal, and maximum input voltage at full rated power, for 1.8V output.
Product # DQ63318QGL08
-60
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Figure 30: Reverse Transmission (RT2 = Iin/Iout2) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output.
Doc.# 005-2DQ638D Rev. B
10/7/03
Page 9
Performance Curves
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
100
10
35 Vin
48 Vin
75 Vin
1
Input Impedance (Ω )
Input Impedance (Ω )
100
10
35 Vin
48 Vin
75 Vin
1
0.1
0.1
10
100
1,000
Hz
10,000
100,000
Figure 31: Input impedance (Zin = Vin/Iin) for minimum, nominal, and
maximum input voltage at full rated power for 1.8V output.
Product # DQ63318QGL08
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10
100
1,000
Hz
10,000
100,000
Figure 32: Input impedance (Zin = Vin/Iin) for minimum, nominal, and
maximum input voltage at full rated power for 3.3V output.
Doc.# 005-2DQ638D Rev. B
10/7/03
Page 10
Technical Specification
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
BASIC OPERATION AND FEATURES
The DualQor series converter uses a two-stage power circuit
topology in which the two output voltages are cross regulated.
The first stage is a buck-converter that keeps the output voltage
constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions of
input/output isolation and voltage step-down to achieve the low
output voltage required.
The two-stage solution is ideal for converters with multiple crossregulated output voltages. The first-stage compensates for any
variations in line voltage. Therefore, the dependence of the
output voltage on line variations is minimized.
Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the
transformer’s output is accomplished with synchronous rectifiers. These devices, which are MOSFETs with a very low onstate resistance, dissipate far less energy than Schottky diodes.
This is the primary reason that the DualQor series of converters
has such high efficiency, even at very low output voltages and
very high output currents.
Dissipation throughout the converter is so low that it does not
require a heatsink for operation. However, baseplated versions
are available for optional heatsinking in severe thermal environments.
The DualQor series converter uses the industry standard footprint and pin-out configuration.
The DualQor has many standard control and protection features. All shutdown features are non-latching, meaning that the
converter shuts off for 200 ms before restarting. (See Figure F)
CONTROL FEATURES
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits the user to control when the converter is on or off. This
input is referenced to the return terminal of the input bus,
Vin(-). There are two versions of the converter that differ by the
sense of the logic used for the ON/OFF input.
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on). In the negative
logic version, the ON/OFF signal is active low (meaning that a
low turns the converter on). Figure A details five possible circuits for driving the ON/OFF pin. Figure B is a detailed look of
the internal ON/OFF circuitry.
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits
the user to adjust the output voltage up or down according to
the trim range specifications. It is important to recognize that
adjusting one output will also adjust the second output proportionally. To lower the output voltage, the user should connect a
resistor between Pin 6 and Pin 4. To raise the output voltage,
the user should connect a resistor between Pin 6 and Pin 5. The
following table shows the resistor values needed to trim the output voltage up or down.
Vo(%)
1
2
3
4
5
6
7
8
9 10
R up
54.9 24.9 14.3 9.31 6.34 4.32 2.80 1.69 0.83 0
R down 68.1 30.1 17.8 11.5 7.68 5.36 3.48 2.10 1.05 0
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently Enabled)
ON/OFF
Positive Logic
(Permanently Enabled)
5V
Vin(+)
5V
274k
ON/OFF
50k
TTL
TTL/
CMOS
ON/OFF
Vin(_)
Vin(_)
Open Collector Enable Circuit
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # DQ63318QGL08
100pF
50k
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Figure B: Internal ON/OFF pin circuitry
Doc.# 005-2DQ638D Rev. B
10/7/03
Page 11
Technical Specification
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
Resistor values in Kohms for the desired increase/decrease
(typical) in output voltage (%)
Note: The TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection
circuit to engage, particularly during transients.
Total DC Variation of Vout: For the converter to meet its
full specifications, the maximum variation of the DC value of
Vout, due to both trimming and remote load voltage drops,
should not be greater than that specified for the output voltage
trim range.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed
to turn off when the input voltage is too low, helping avoid an
input system instability problem, described in more detail in the
application note titled “Input System Instability”. The lockout circuitry is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical Turn-On Voltage
Threshold value (listed on the specification page) before the
converter will turn on. Once the converter is on, the input voltage must fall below the typical Turn-Off Voltage Threshold value
before the converter will turn off.
Output Current Limit: The maximum current limit remains
constant as the output voltage drops. However, once the impedance of the short across the output is small enough to make the
output voltage drop below the specified Output DC CurrentLimit Shutdown Voltage, the converter turns off.
The converter then enters a “hiccup mode” where it repeatedly
turns on and off at a 5 Hz (nominal) frequency with a 5% duty
cycle until the short circuit condition is removed. This prevents
Vin
External
Input
Filter
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the Output Over-Voltage Protection threshold, the
converter will immediately stop switching. This prevents damage to the load circuit due to 1) excessive series resistance in
output current path from converter output pins to sense point, 2)
a release of a short-circuit condition, or 3) a release of a current limit condition. Load capacitance determines exactly how
high the output voltage will rise in response to these conditions.
After 200 ms the converter will automatically restart.
Over-Temperature Shutdown: A temperature sensor on
the converter senses the average temperature of the module.
The thermal shutdown circuit is designed to turn the converter
off when the temperature at the sensed location reaches the
Over-Temperature Shutdown value. It will allow the converter to
turn on again when the temperature of the sensed location falls
by the amount of the Over-Temperature Shutdown Restart
Hysteresis value.
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur
because any DC/DC converter appears incrementally as a
negative resistance load. A detailed application note titled
“Input System Instability” is available on the SynQor web site
(www.synqor.com) which provides an understanding of why
this instability arises, and shows the preferred solution for correcting it.
Application Circuits: Figure D below provides a typical circuit diagram which details the input filtering and voltage trimming.
Vin(+ )
Electrolytic
Capacitor
33µF
ESR ≅1Ω
excessive heating of the converter or the load board.
3.3 Vout(+ )
Trim
ON/OFF
Iload
Rtrim-up
Cload
OP RTN
or
Rtrim-down
Vin(_)
Cload
1.8 Vout(+ )
Iload
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Product # DQ63318QGL08
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Doc.# 005-2DQ638D Rev. B
10/7/03
Page 12
Technical Specification
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
Input Filtering and External Capacitance: Figure E provides a diagram showing the internal input filter components.
This filter dramatically reduces input terminal ripple current,
which otherwise could exceed the rating of an external electrolytic input capacitor. The recommended external input
capacitance is specified in the “Input Characterisitcs” section.
More detailed information is available in the application note
titled “EMI Characteristics” on the SynQor website.
L
Vin(+)
C2
C1
Vin(_)
Figure E: Internal Input Filter Diagram (values listed on page 3).
Startup Inhibit Period: The Startup Inhibit Period ensures
that the converter will remain off for at least 200ms when it is
shut down for any reason. When an output short is present,
this generates a 5Hz "hiccup mode," which prevents the converter from overheating. In all, there are seven ways that the
converter can be shut down, initiating a Startup Inhibit Period:
• Input Under-Voltage Lockout
• Input Over-Voltage Shutdown (not present in Quarter-brick)
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Before time t0, when the input voltage is below the UVL threshold, the unit is disabled by the Input Under-Voltage Lockout feature. When the input voltage rises above the UVL threshold, the
Input Under-Voltage Lockout is released, and a Startup Inhibit
Period is initiated. At the end of this delay, the ON/OFF pin is
evaluated, and since it is active, the unit turns on.
At time t1, the unit is disabled by the ON/OFF pin, and it cannot be enabled again until the Startup Inhibit Period has
elapsed.
• Output Over-Voltage Protection
• Over Temperature Shutdown
• Current Limit
When the ON/OFF pin goes high after t2, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-On Time.
• Short Circuit Protection
• Turned off by the ON/OFF input
Vin
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
ON
OFF
OFF ON
ON
4ms (typical
Vout
turn on time)
200ms
(typical start-up
inhibit period)
t0
200ms
200ms
t1
t
t2
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # DQ63318QGL08
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Doc.# 005-2DQ638D Rev. B
10/7/03
Page 13
Technical Specification
Quarter
Brick Dual 48Vin 3.3/1.8Vout 77W
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s DualQor DC/DC
converters follows the format shown in the example below.
Refer to the website for the most current list of valid model
numbers and ordering options for converters in this product
family. When ordering SynQor converters, please ensure
that you use the complete 15 character part number consisting of the 12 character base part number and the additional 3 characters for options.
DQ 6 33 18 Q G L 08 N K S
Options
(see
Ordering Information)
Output Power (W)
Thermal Design
Performance Level
Package Size
Output Voltage 2
Output Voltage 1
Input Voltage
Product Family
The first 12 characters comprise the base part number and
the last 3 characters indicate available options. Although
there are no default values for options, the most common
options are negative logic, 0.145” pins and standard feature set. These part numbers are more likely to be readily
available in stock for evaluation and prototype quantities.
Application Notes
A variety of application notes and technical white papers
can be downloaded in pdf format at www.synqor.com.
Model Number
Input Voltage
DQ63312QGL07xyz
DQ63315QGL07xyz
DQ63315QGL08xyz
DQ63318QGL08xyz
DQ63325QGL09xyz
DQ65033QGL10xyz
DQ63312QGA07xyz
DQ63315QGA07xyz
DQ63315QGA08xyz
DQ63318QGA08xyz
DQ63325QGA09xyz
DQ65033QGA10xyz
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
Modules listed above with QGA in part number have an
increased bottom side board clearance and a slightly larger total height (see page 2 for dimensions). There are no
other differences from the QGL units.
The following option choices must be included in the last
three places of the model number.
Options Description
Enable
Logic
Pin
Length
K - 0.110"
P - Positive N - 0.145"
N - Negative R - 0.180"
Y - 0.250"
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # DQ63318QGL08
508-485-8434
888-567-9596
508-485-8414
[email protected]
www.synqor.com
188 Central Street
Hudson, MA 01749
Phone 1-888-567-9596
Output Max Output
Voltages
Power
3.3/1.2 V
68 W
3.3/1.5 V
72 W
3.3/1.5 V
80 W
3.3/1.8 V
77 W
3.3/2.5 V
87 W
5.0/3.3 V
100 W
3.3/1.2 V
68 W
3.3/1.5 V
72 W
3.3/1.5 V
80 W
3.3/1.8 V
77 W
3.3/2.5 V
87 W
5.0/3.3 V
100 W
Feature
Set
S - Standard
T - 2nd Trim
pin
Warranty
SynQor offers a three (3) year limited warranty. Complete warranty
information is listed on our web site or is available upon request from
SynQor.
Information furnished by SynQor is believed to be accurate and reliable.
However, no responsibility is assumed by SynQor for its use, nor for any
infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any
patent or patent rights of SynQor.
Doc.# 005-2DQ638D Rev. B
10/7/03
Page 14
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