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Technical Specification
Brick Dual 48Vin 3.3/1.5Vout 72W
Quarter
Dual Output, High Efficiency, Isolated DC/DC Converter
The DQ63315QGL07 DualQorTM 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 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.
Dual Output
DQ63315QGL07 Module
Operational Features
* Independently regulated outputs (separate control loops) * High efficiency, 87% at full rated load current * Delivers up to 72 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
Protection Features
* 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
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
Safety Features
* 2000V, 30 M 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
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 # DQ63315QGL07 Phone 1-888-567-9596
Doc.# 005-2DQ315D Rev. B
10/7/03
Page 1
Technical Specification
Brick Dual 48Vin 3.3/1.5Vout 72W
0.500
Quarter
MECHANICAL DIAGRAM
0.350
(8.89)
(12.7)
2.30 0.375
(9.53) (58.4)
0.375 0.250
(6.35) (9.53)
2.00
(50.8)
0.350
(8.89)
Top View
0.750
(19.05)
1.450
(36.83)
0.700
(17.78)
Pin far side typical
Side View
Bottom side Clearance
0.340 +.014
(8.64 +0.36)
QGA Option 0.424 (10.77) max height
See Note 8
0.019+/-0.013
(0.48+/-0.33)
Lowest Component
Load Board
0.145
(3.68) See Note 2
QGA Option 0.076 (1.93) min clearance
See Note 8
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: 1.1 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.
PIN CONNECTIONS
Pin No.
1 2 3 4 5
Name
Vin(+) ON/OFF Vin(-) 1.5Vout(+) OP RTN
Function
Positive input voltage TTL input to turn converter on and off, referenced to Vin(-), with internal pull up. Negative input voltage 1.5V positive output voltage 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.# 005-2DQ315D Rev. B 10/7/03 Page 2
Product # DQ63315QGL07
Phone 1-888-567-9596
Technical Specification
Brick Dual 48Vin 3.3/1.5Vout 72W
TA=25C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40C to +100C ambient temperature with appropriate power derating. Specifications subject to change without notice.
Quarter
DQ63315QGL07 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Min.
Typ.
Max.
100 80 100 2000 100 125 18
Units
V V V V C C V V V V V A mA mA A 2s mV mA A H\F F V V %\mV %\mV mV %\mV %\mV mV V V mV mV A A A A A A V V A mA mF mF dB mV mV s
Notes & Conditions
continuous continuous 100ms transient Basic level, 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 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 Voltage Set Point (1.5V) Output Voltage Set Point (3.3V) Output Voltage Regulation (1.5V) Over Line Over Load Over Temperature Total Output Voltage Regulation (3.3V) Over Line Over Load Over Temperature Total Output Voltage Range (1.5V) Total Output Voltage Range (3.3V) Output Voltage Ripple and Noise (1.5V & 3.3V) Peak-to-Peak RMS Operating Output Current Range (1.5V) Operating Output Current Range (3.3V) Output DC Current-Limit Inception (1.5V) Output DC Current-Limit Inception (3.3V) Short-Circuit Protection - redundant shutdown (1.5V) Short-Circuit Protection - redundant shutdown (3.3V) Output DC Current-Limit Shutdown Voltage (1.5V) Output DC Current-Limit Shutdown Voltage (3.3V) Back-Drive Current Limit while Enabled Back-Drive Current Limit while Disabled Maximum Output Capacitance (1.5V) Maximum Output Capacitance (3.3V)
-40 -55 -2 35 32 28.5 2.5 48 33 29.5 3.5 60 2 3 33 1.46 3.26 4.7\1x2 47 1.50 3.30
INPUT CHARACTERISTICS
75 34 30.5 4.5 2.85 80 3 0.03 5 20
100% Load, 35 Vin
1000V/ms input transient RMS thru 10H 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
OUTPUT CHARACTERISTICS
1.54 3.34
+0.05 \ 2 +0.15 \ 5 +1.0 \ 15 +2.0 \ 30 +40 +25 +0.05 \ 2 +0.15 \ 5 +0.5 \ 17 +1.0 \ 33 +70 +50 1.58 3.41 50 10 17 17 17 17 0.5 1.0 1.0 10 100 20 15 15 19.4 19.4
1.42 3.19
0 0 15.2 15.2
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 & 20 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 1.5V at 15A resistive load 3.3V at 15A resistive load 120 Hz; Figs. 27-28 50% to 75% to 50% Iout max; Figure 15 50% to 75% to 50% Iout max; Figure 16 to within 1% Vout nom Full load, Vout=90% nom.; Figs. 13 & 14 -40C to +125C; Figure F 10mF load capacitance, Iout = 0A 48Vin, 100% load each Vout; Figs 1 - 6 48Vin, 50% load each Vout; Figs 1 - 6 Package rated to 150C UL rated max operating temp 130C See Figures 7 - 12 for derating curves 10/7/03 Page 3
10 10
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection (1.5V \ 3.3V) Output Voltage during Load Current Transient Step Change in 1.5V Output Current (.1A/s) Step Change in 3.3V Output Current (.1A/s) Settling Time Turn-On Transient Turn-On Time Start-Up Inhibit Time Output Voltage Overshoot 100% Load 50% Load Semiconductor Junction Temperature Board Temperature Transformer Temperature
80\80 100 100 300 180 6 200 0 87 87 125 125 125 12 215
ms ms % % % C C C
EFFICIENCY
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Product # DQ63315QGL07
Phone 1-888-567-9596
Doc.# 005-2DQ315D Rev. B
Technical Specification
Brick Dual 48Vin 3.3/1.5Vout 72W ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
ISOLATION CHARACTERISTICS
Quarter
Min.
Typ.
2000 30
Max.
Units
V M pF kHz V V V V V k % % % C C
Notes & Conditions
Isolation Voltage Isolation Resistance Isolation Capacitance
3300 290 0.8 18 18 0.8
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 (1.5V) Output Over-Voltage Protection (3.3V) Over-Temperature Shutdown Over-Temperature Shutdown Restart Hysteresis Calculated MTBF (Telcordia) Calculated MTBF (MIL-217) Demonstrated MTBF
230 -2 2.4 2.4 -2
260
-10 111 111
Vin/6.5 40 117 117 125 10 TBD TBD TBD
9.2 +10 125 125
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
RELIABILITY CHARACTERISTICS
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
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 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
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 Vin and load, units at derating point, 1000 hours
100g minimum, 2 drops in x and y axis, 1 drop in z axis -40C to 100C, unit temp. ramp 15C/min., 500 cycles Toperating = min to max, Vin = min to max, full load, 100 cycles Tmin-10C to Tmax+10C, 5C steps, Vin = min to max, 0-105% load 85C, 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
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 # DQ63315QGL07 Phone 1-888-567-9596
PATENTS
SynQor is protected under various patents, including but not limited to U.S. Patent # 5,999,417.
Doc.# 005-2DQ315D Rev. B
10/7/03
Page 4
Performance Curves
Brick Dual 48Vin 3.3/1.5Vout 72W
90 89 88 9
Quarter
Power Dissipation (W)
8
Efficiency (%)
87 86 85 84 83 82 7 8 9 10 11 12 13 14 15
3.3Vo, 1.5Vo, 3.3Vo, 1.5Vo, 3.3Vo, 1.5Vo, 35Vin 35Vin 48Vin 48Vin 75Vin 75Vin
7
6
5
4 7 8 9 10 11 12 13
3.3Vo, 1.5Vo, 3.3Vo, 1.5Vo, 3.3Vo, 1.5Vo,
35Vin 35Vin 48Vin 48Vin 75Vin 75Vin
14
15
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 25C. Output not under test is held constant at half load.
100 95 90
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 25C. Output not under test is held constant at half load.
12 11 10
Power Dissipation (W)
9 8 7 6 5 4 3 2 1 0 0 10 20 30 40 50 60 70 35 Vin 48 Vin 75 Vin
Efficiency (%)
85 80 75 70 65 60 0 10 20 30 40 50 60 70 35 Vin 48 Vin 75 Vin
Total Output Power (W)
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 25C. Both loads are equal and range from zero to full load.
90.0 89.5 89.0
Figure 4: Overall converter power dissipation vs. output power from zero load to full load at minimum, nominal, and maximum input voltage at 25C. Both loads are equal and range from zero to full load.
8.0 7.5
Power Dissipation (W)
7.0 6.5 6.0 5.5 5.0 4.5 4.0 25 C 40 C 55 C
Efficiency (%)
88.5 88.0 87.5 87.0 86.5 86.0 0 50 100 150 200 250 300 350 400 25 C 40 C 55 C
0
50
100
150
200
250
300
350
400
Airflow (LFM)
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 25C, 40C and 55C (nominal input voltage).
Product # DQ63315QGL07 Phone 1-888-567-9596
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 25C, 40C and 55C (nominal input voltage).
Doc.# 005-2DQ315D Rev. B 10/7/03 Page 5
Performance Curves
Brick Dual 48Vin 3.3/1.5Vout 72W
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 1
Quarter
1.5V, Iout (A)
400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s)
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Semiconductor junction temperature is within 1C of surface temperature
3.3V, Iout (A)
Figure 7: Maximum output power derating curves at 55C vs. airflow rates of 100 through 400 LFM. Curve shows available current for 1.5V 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 0 1
Figure 8: Thermal plot of converter at 15A load on 1.5V ouput and 14A load on 3.3V output with 55C air flowing at 200 LFM. Air flow across the converter is from pin 1 to pin 3 (nominal input voltage).
1.5V, Iout (A)
400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s)
2
3
4
5
6
7
8
9
10
11
12
13
14
15
3.3V, Iout (A)
Semiconductor junction temperature is within 1C of surface temperature
Figure 9: Maximum output power derating curves at 70C vs. airflow rates of 100 through 400 LFM. Curve shows available current for 1.5V 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 0 1
Figure 10: . Thermal plot of converter at 13A load on 1.5V ouput and 12.5A load on 3.3V output with 70C air flowing at 200 LFM. Air flow across the converter is from pin 1 to pin 3 (nominal input voltage).
1.5V, Iout (A)
400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s)
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Semiconductor junction temperature is within 1C of surface temperature
3.3V, Iout (A)
Figure 11: Maximum output power derating curves at 85C vs. airflow rates of 100 through 400 LFM. Curve shows available current for 1.5V rail on y axis and available current for 3.3V rail on x axis. (nom. Vin)
Product # DQ63315QGL07 Phone 1-888-567-9596
Figure 12: Thermal plot of converter at 12A load on 1.5V ouput and 9.5A load on 3.3V output with 85C air flowing at 200 LFM. Air flow across the converter is from pin 1 to pin 3 (nominal input voltage).
Doc.# 005-2DQ315D Rev. B 10/7/03 Page 6
Performance Curves
Brick Dual 48Vin 3.3/1.5Vout 72W
Quarter
Semiconductor junction temperature is within 1C of surface temperature
Figure 13: Turn-on transient at full rated load current (resistive load) (10 ms/div). Ch 1: 1.5Vout (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: 1.5Vout (1V/div); Ch 2: 3.3Vout (1V/div) Ch 3: ON/OFF input (5V/div)
1.5Vout
1.5Vout
1.5Iout 3.3Vout
1.5Iout 3.3Vout
3.3Iout
3.3Iout
Semiconductor junction temperature is within 1C of surface temperature
Figure 15: Output voltage response to step-change in Iout1 (50%-75%-50% of Imax; dI/dt = 0.1A/s). Load cap: 15F, 300 m ESR tantalum & 1F ceramic. Vout (100mV/div), Iout (10A/div). Ch1: Vout1; Ch2 Iout1; Ch 3: Vout2; Ch 4 Iout2
Figure 16: Output voltage response to step-change in Iout2 (50%-75%-50% of Imax; dI/dt = 0.1A/s). Load cap: 15F, 300 m ESR tantalum & 1F ceramic. Vout (100mV/div), Iout (10A/div). Ch1: Vout1; Ch2 Iout2; Ch 3: Vout2; Ch 4 Iout2
Figure 19
source impedance
10 H
Figure 18
Figure 20
VOUT2+
iS
VSOURCE
iC
DC/DC Converter 1 F
VOUT1+
15 F, 300m ESR
tantalum capacitors
100 F, <1 ESR
electrolytic capacitor
ceramic capacitors
COM (-)
Semiconductor junction temperature is within 1C of surface temperature
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 # DQ63315QGL07 Phone 1-888-567-9596
Figure 18: Input Terminal Ripple Current, 1.5V & 3.3V outputs at full rated output current and nominal input voltage with 10H source impedance and 100F electrolytic capacitor (10 mA/div). (see Fig. 17)
Doc.# 005-2DQ315D Rev. B 10/7/03 Page 7
Performance Curves
Brick Dual 48Vin 3.3/1.5Vout 72W
Quarter
1.5Vout
3.3Vout
Figure 19: Input Reflected Ripple Current, is, through a 10 H source inductor at nominal input voltage and rated load current (5 mA/div). 1.5V and 3.3V outputs at full rated load current. (see Fig. 17)
2.5
Figure 20: Output Voltage Ripple at nominal input voltage and rated load current on both outputs (20 mV/div). Load capacitance: 1F ceramic & 15F tantalum. Bandwidth: 20 MHz. (see Fig. 17)
4.0 3.5 Output Voltage (V) 3.0 2.5 2.0 1.5 1.0 0.5 0.0 35 V 48 V 75 V 0 5 10 Load Current (A) 15 20
2.0 Output Voltage (V)
1.5
1.0 35 V 0.5 48 V 75 V 0.0 0 5 10 Load Current (A) 15 20
Figure 21: Output voltage vs. load current showing typical current limit curves and converter shutdown points for the 1.5V 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. 1.5V load is at 0A.
Figure 23: Load current for 1.5V output (20A/div) as a function of time when the converter attempts to turn on into a 10 m short circuit. Bottom trace is an expansion of the on-time portion of the top trace.
Product # DQ63315QGL07 Phone 1-888-567-9596
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 m short circuit. Bottom trace is an expansion of the on-time portion of the top trace.
Doc.# 005-2DQ315D Rev. B 10/7/03 Page 8
Performance Curves
Brick Dual 48Vin 3.3/1.5Vout 72W
0.1
0.1
Quarter
Output Impedance ( )
0.01
35 Vin 48 Vin 75 Vin
Output Impedance ( )
0.01
35 Vin 48 Vin 75 Vin
0.001 10 100 1,000 10,000 100,000
0.001 10 100 1,000 10,000 100,000
Hz
Hz
Figure 25: Output impedance (Zout1 = Vout1/Iout1) for minimum, nominal, and maximum input voltage at full rated power, for 1.5V output.
-30 -40
Forward Transmission (dB)
Figure 26: Output impedance (Zout2 = Vout2/Iout2) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output.
-30 -40
Forward Transmission (dB)
-50 -60 -70 -80 -90 -100 -110 10 100 1,000 10,000 100,000 35 Vin 48 Vin 75 Vin
-50 -60 -70 -80 -90 -100 -110 10 100 1,000 10,000 100,000 35 Vin 48 Vin 75 Vin
Hz
Hz
Figure 27: Forward Transmission (FT1 = Vout1/Vin) for minimum, nominal, and maximum input voltage at full rated power, for 1.5V output.
-10 -15
Reverse Transmission (dB)
Figure 28: Forward Transmission (FT2 = Vout2/Vin) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output.
-10 -15
Reverse Transmission (dB)
-20 -25 -30 -35 -40 -45 -50 -55 -60 10 100 1,000 10,000 100,000 35 Vin 48 Vin 75 Vin
-20 -25 -30 -35 -40 -45 -50 -55 -60 10 100 1,000 10,000 100,000 35 Vin 48 Vin 75 Vin
Hz
Hz
Figure 29: Reverse Transmission (RT1 = Iin/Iout1) for minimum, nominal, and maximum input voltage at full rated power, for 1.5V output.
Product # DQ63315QGL07 Phone 1-888-567-9596
Figure 30: Reverse Transmission (RT2 = Iin/Iout2) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output.
Doc.# 005-2DQ315D Rev. B 10/7/03 Page 9
Performance Curves
Brick Dual 48Vin 3.3/1.5Vout 72W
100 100
Quarter
Input Impedance ( )
10 35 Vin 48 Vin 75 Vin 1
Input Impedance ( )
10 35 Vin 48 Vin 75 Vin 1
0.1 10 100 1,000 Hz 10,000 100,000
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 1.5V output.
Figure 32: Input impedance (Zin = Vin/Iin) for minimum, nominal, and maximum input voltage at full rated power for 3.3V output.
Product # DQ63315QGL07
Phone 1-888-567-9596
Doc.# 005-2DQ315D Rev. B
10/7/03
Page 10
Technical Specification
Brick Dual 48Vin 3.3/1.5Vout 72W
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 ver-
Quarter
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
sions are available for optional heatsinking in severe thermal environments. The DualQor series converter uses the industry standard footprint and pin-out configuration.
ON/OFF
ON/OFF
ON/OFF
Vin(_) Remote Enable Circuit
Vin(_) Negative Logic (Permanently Enabled) ON/OFF
TTL/ CMOS
Vin(_) Positive Logic (Permanently Enabled)
Vin(+)
274k ON/OFF 50k
5V
5V ON/OFF
TTL
100pF 50k
Vin(_) Open Collector Enable Circuit
Vin(_) Direct Logic Drive
Vin(_)
Figure A: Various circuits for driving the ON/OFF pin.
Product # DQ63315QGL07 Phone 1-888-567-9596
Figure B: Internal ON/OFF pin circuitry
Doc.# 005-2DQ315D Rev. B 10/7/03 Page 11
Technical Specification
Brick Dual 48Vin 3.3/1.5Vout 72W
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. excessive heating of the converter or the load board. 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.
Quarter
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
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
External Input Filter
Electrolytic Capacitor 33F
ESR 1
Vin(+)
3.3 Vout(+) Trim
Rtrim-up Cload
or
Iload
ON/OFF
OP RTN Rtrim-down Cload Iload
Vin(_)
1.8 Vout(+)
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Product # DQ63315QGL07 Phone 1-888-567-9596 Doc.# 005-2DQ315D Rev. B 10/7/03 Page 12
Technical Specification
Brick Dual 48Vin 3.3/1.5Vout 72W
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.
Quarter
L
Vin(+)
C1 Vin(_)
C2
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) * Output Over-Voltage Protection * Over Temperature Shutdown * Current Limit * Short Circuit Protection * Turned off by the ON/OFF input
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. 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.
Vin
Under-Voltage Lockout Turn-On Threshold
ON/OFF
(pos logic)
ON
OFF ON
OFF
ON
4ms (typical
Vout
turn on time)
200ms
(typical start-up inhibit period)
200ms
200ms
t0
t1
t2
t
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # DQ63315QGL07 Phone 1-888-567-9596 Doc.# 005-2DQ315D Rev. B 10/7/03 Page 13
Technical Specification
Brick Dual 48Vin 3.3/1.5Vout 72W
PART NUMBERING SYSTEM
The part numbering system for SynQor's DualQor DC/DC converters follows the format shown in the example below.
DQ 6 33 15 Q G L 07 N K S Options
(see Ordering Information)
Quarter
ORDERING INFORMATION
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.
Model Number DQ63312QGL07xyz DQ63315QGL07xyz DQ63315QGL08xyz DQ63318QGL08xyz DQ63325QGL09xyz DQ65033QGL10xyz DQ63312QGA07xyz DQ63315QGA07xyz DQ63315QGA08xyz DQ63318QGA08xyz DQ63325QGA09xyz DQ65033QGA10xyz Input Voltage 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 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
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.
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
Pin Length K - 0.110" P - Positive N - 0.145" N - Negative R - 0.180" Y - 0.250" Enable Logic Feature Set S - Standard T - 2nd Trim pin
Application Notes
A variety of application notes and technical white papers can be downloaded in pdf format at www.synqor.com.
Contact SynQor for further information:
Phone: Toll Free: Fax: E-mail: Web: Address:
508-485-8434 888-567-9596 508-485-8414 sales@synqor.com www.synqor.com 188 Central Street Hudson, MA 01749
Phone 1-888-567-9596
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.# 005-2DQ315D Rev. B 10/7/03 Page 14
Product # DQ63315QGL07

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