Technical
Specification
IQ48-QT Family
34-75V
Continuous Input
100V
Transient Input
1.8-48V
Outputs
150W
Max Power
2250V dc
Isolation
Quarter-brick
DC-DC Converter
The InQor
®
quarter-brick converter series is composed
of next-generation, board-mountable, isolated,
fixed switching frequency dc-dc converters that use
synchronous rectification to achieve extremely high
power conversion efficiency. Each module is supplied
completely encased to provide protection from the
harsh environments seen in many industrial and
transportation applications.
Operational Features
•
•
•
•
•
High efficiency, 90% at full load
Delivers full power with minimal derating - no heatsink required
Operating input voltage range: 1.8-48 V
Fixed frequency switching provides predictable EMI
No minimum load requirement
Mechanical Features
•
•
•
•
Industry standard quarter-brick pin-out configuration
Size: 1.536” x 2.386” x 0.50” (39.01 x 60.6 x 12.7 mm)
Total height: 0.445” (11.3mm)
Total weight: 3 oz (85 g)
•
•
•
•
•
Protection Features
Input under-voltage lockout
Output current limit and short circuit protection
Active back bias limit
Output over-voltage protection
Thermal shutdown
Control Features
• On/Off control referenced to input side
• Remote sense for the output voltage
• Output voltage trim range of -20%, +10%
CONTENTS
IQ48-QT Family Electrical Characteristics (all output voltages).
. . . . . .
2
IQ48-QT Family Figures (all output voltages)
. . . . . . . . . . . . . . . . . . .
3
IQ48018QTx40 Electrical Characteristics (1.8Vout) & Figures.
. . . . . .4-5
IQ48033QTx30 Electrical Characteristics (3.3Vout) & Figures.
. . . . . .6-7
IQ48050QTx25 Electrical Characteristics (5.0Vout) & Figures.
. . . . . .8-9
IQ48070QTx20 Electrical Characteristics (7.0Vout) & Figures.
. . . .
10-11
IQ48120QTx12 Electrical Characteristics (12.0Vout) & Figures.
. . .
12-13
IQ48150QTx10 Electrical Characteristics (15.0Vout) & Figures.
. . .
14-15
IQ48240QTx06 Electrical Characteristics (24.0Vout) & Figures.
. . .
16-17
IQ48300QTx05 Electrical Characteristics (30.0Vout) & Figures.
. . .
18-19
IQ48480QTx03 Electrical Characteristics (48.0Vout) & Figures.
. . .
20-21
Application Section
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22-25
IQ48-QT Family Standards and Qualifications (all output voltages)
. .
26
IQ48-QTC Mechanical Drawing
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
IQ48-QTV Mechanical Drawing
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
28
Ordering Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29
Page No.
Safety Features
•
•
•
•
•
•
2250 V input-to-output isolation
UL 60950-1:2003
CAN/CSA-C22.2 No. 60950-1:2003
EN60950-1:2001
CE Marked
RoHS compliant (see last page)
Product # IQ48xxxQTXxx
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005203 Rev.
B
5/10/10
Page 1
Technical
Specification
IQ48-QT Family
IQ48-QT Family Electrical Characteristics (all output voltages)
Ta = 25°C, airflow rate = 300 LFM, Vin = 48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C baseplate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
Max.
80
75
2250
2250
2250
100
125
18
Units Notes & Conditions
V
V
V dc
V dc
V dc
°C
°C
V
V
V
V
V
µF
µH\µF
Continuous
Continuous
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Isolation Voltage
Input to Output
Input to Base-Plate
Output to Base-Plate
Operating Temperature
-40
Storage Temperature
-55
Voltage at ON/OFF input pin
-2
INPUT CHARACTERISTICS
Operating Input Voltage Range
34
Input Under-Voltage Lockout
32.2
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
30.2
Lockout Voltage Hysteresis
Recommended External Input Capacitance
Input Filter Component Values (L\C)
DYNAMIC CHARACTERISTICS
Turn-On Transient
Turn-On Time
200
Start-Up Inhibit Time
Output Voltage Overshoot
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance (input to output)
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Maximum Baseplate Temperature, Tb
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control
Off-State Voltage
2.4
On-State Voltage
-2
ON/OFF Control
Pull-Up Voltage
Pull-Up Resistance
Over-Temperature Shutdown OTP Trip Point
Over-Temperature Shutdown Restart Hysteresis
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia) TR-NWT-000332
Calculated MTBF (MIL-217) MIL-HDBK-217F
Field Demonstrated MTBF
Baseplate temperature
48
33.0
31.0
2.0
100
4.7\6.6
75
33.8
31.8
Typical ESR 0.1-0.2Ω
Internal values; see Figure E
10
230
0
250
ms
ms
%
Full load, Vout=90% nom.
Figure F; See Note 2
Maximum Output Capacitance
See Absolute Maximum Ratings
30
1000
125
125
125
100
250
18
0.8
5
50
125
10
2.5
1.8
TBD
MΩ
pF
°C
°C
°C
°C
kHz
V
See Note 1
Package rated to 150°C
UL rated max operating temp 130°C
Application notes Figures A & B
V
kΩ
°C
°C
Average PCB Temperature
106 Hrs. 80% load, 200LFM, 40°C Ta
106 Hrs. 80% load, 200LFM, 40°C Ta
106 Hrs. See our website for details
Note 1: Higher values of isolation capacitance can be added external to the module.
Note 2: Maximum value is 400ms for DC current limit and short circuit fault conditions
Product # IQ48xxxQTXxx
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005203 Rev.
B
5/10/10
Page 2
Technical
Specification
IQ48-QT Family
IQ48-QT Family Figures (all output voltages)
Nominal Vout
120
Typical Current Limit Inception Point
100
Output Voltage (%)
80
Typical Output Voltage at Shutdown
60
40
Vin, Min.
20
Vin, Typ.
Vin, Max.
0
0
10
20
30
40
50
60
70
80
90 100 110 120 130 140 150
Load Current (% )
Common Figure 1: Typical startup waveform. Input voltage pre-applied,
ON/OFF Pin on Ch 2.
Common Figure 2: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
100,000.0
100,000.0
1.8 V
Trim Resistance (kOhms)
10,000.0
3.3 V
5V
7V
12 V
Trim Resistance (kOhms)
10,000.0
15 V
24 V
30 V
48 V
1,000.0
1,000.0
100.0
10.0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
100.0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Increase in Vout (%)
Increase in Vout (%)
Common Figure 3: Trim graph for trim-up 1.8 to 7 V outputs.
10,000.0
Common Figure 4: Trim graph for trim-up 12 to 24 V outputs.
All voltages
Trim Resistance (kOhms)
1,000.0
100.0
10.0
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20
Decrease in Vout (%)
Common Figure 5: Trim graph for trim down.
Product # IQ48xxxQTXxx
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005203 Rev.
B
5/10/10
Page 3
Technical Specification
IQ48018QTx40 Electrical Characteristics (1.8Vout)
Input:
Output:
Current:
Part No.:
34-75V
1.8V
40A
IQ48018QTx40
Ta = 25°C, airflow rate = 300 LFM, Vin = 48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C baseplate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
INPUT CHARACTERISTICS
Maximum Input Current
No-Load Input Current
Disabled Input Current
Response to Input Transient
Input Terminal Ripple Current
Recommended Input Fuse
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
Output Voltage during Load Current Transient
Step Change in Output Current (0.1A/µs)
Settling Time
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
EFFICIENCY
100% Load
50% Load
Min.
Typ.
Max.
3.3
Units Notes & Conditions
A
mA
mA
V
mA
500V/ms; see Figure 6
RMS
Fast acting external fuse recommended
Vin min; trim up; in current limit
75
2
0.035
260
90
4
15
A
1.782
1.8
1.818
V
±0.1
±0.1
-27
1.755
±0.3
±0.3
27
1.845
%
%
mV
V
Over sample, line, load, temperature & life
20MHz bandwidth; see Note 1
0
85
20
170
40
40
mV
mV
A
A
V
A
mA
Full load
Full load
Subject to thermal derating
Output voltage 10% Low
0
44.0
48.0
0.6
5
10
52.0
Negative current drawn from output
Negative current drawn from output
Vout nominal at full load (resistive load)
10,000
µF
70
400
-20
10
10
2.1
2.2
2.3
mV
µs
%
%
V
50% to 75% to 50% Iout max
To within 1% Vout nom
Across Pins 8&4; Common Figures 3-5; see Note 2
Across Pins 8&4
Over full temp range
82
85
%
%
See Figure 1 for efficiency curve
See Figure 1 for efficiency curve
Note 1: Output is terminated with 1µF ceramic and 22µF low-ESR tantalum capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 2: Trim-up range is limited below 10% at low line and full load. Contact SynQor applications support for more detail (email: support@synqor.com)
Product # IQ48xxxQTXxx
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005203 Rev.
B
5/10/10
Page 4
Technical Specification
100
95
15
90
18
Input:
Output:
Current:
Part No.:
34-75V
1.8V
40A
IQ48018QTx40
Power Dissipation (W)
12
Efficiency (%)
85
80
75
70
65
60
0
5
10
15
20
25
30
35
40
34 Vin
48 Vin
75 Vin
9
6
34 Vin
3
48 Vin
75 Vin
0
0
5
10
15
20
25
30
35
40
Load Current (A)
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
45
40
35
30
45
40
35
30
Iout (A)
Iout (A)
25
20
15
10
5
0
25
40
55
70
85
400
300
200
100
LFM
LFM
LFM
LFM
(2.0
(1.5
(1.0
(0.5
m/s)
m/s)
m/s)
m/s)
25
20
15
10
5
0
25
40
55
70
85
400
300
200
100
LFM
LFM
LFM
LFM
(2.0
(1.5
(1.0
(0.5
m/s)
m/s)
m/s)
m/s)
Ambient Air Temperature (°C)
Ambient Air Temperature (°C)
Figure 3: Open Frame converter max. output power derating vs. ambient air
temperature for airflow rates of 100 LFM through 400 LFM. Air flows across the
converter from input to output (nominal input voltage).
Figure 4: Encased converter (with 1/2” heatsink) max. output power derating
vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air
flows across the converter from input to output (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 15µF tantalum cap and 1µF
ceramic cap. Ch 1: Vout, Ch 2: Iout.
Product # IQ48xxxQTXxx
Phone 1-888-567-9596
Figure 6: Output voltage response to step-change in input voltage (nominal
to maximum input voltage), at 25A load current. Load cap: 15µF tantalum
capacitor and 1uF ceramic cap. Ch 1: Vout , Ch 2: Vin.
Doc.# 005-0005203 Rev.
B
5/10/10
Page 5
www.synqor.com
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