DC-DC
75-350 Watts
QSB Series
•
•
•
•
•
•
•
Wide Input Range
Industry Standard Packages
xppower.com
-40 °C to +100 °C Operating Temperature
High Power Density
Base Plate Cooled
Remote On/Off & Remote Sense
3 Year Warranty
Specification
Input
Input Voltage Range
Input Current
Input Reverse Voltage
Protection
Input Filter
Undervoltage Lockout
• See tables
• See tables
• None
• Pi network
• QSB75-150: 24 Vin: - turn on 8.8 V,
turn off 8.0 V for 9-36 V,
QSB200: 24 Vin -turn on 9.6 V,
turn off 8.8 V,
QSB75-200: 48 Vin - turn on 17.0 V,
turn off 16.0 V,
.0
QSB350: 24 Vin - turn on 17 V,
turn off 16.0 V,
QSB350: 48 Vin - turn on 35.0 V,
turn off 33.0 V
• 24 Vin: 50 VDC for 100 ms
48 Vin: 100 VDC for 100 ms
General
Efficiency
Isolation Voltage
• See tables
• 1500 VDC Input to Output
1500 VDC Input to Case
1500 VDC Output to Case
Isolation Resistance
Isolation Capacitance
Switching Frequency
Power Density
Input Surge
MTBF
Output
• ±10%, see application notes
• ±1.5% max
• ±0.2% max measured from high line
to low line
Load Regulation
• ±0.2% max measured from 0-100% load
Transient Response
• 5% max deviation, recovery to within
1% in 500 µs, 25% step load change
Ripple & Noise
• 3.3 & 5 V models: 100 mV pk-pk
12 & 15 V models: 150 mV pk-pk
24 V & 28 V models: 280 mV max pk-pk
20 MHz bandwidth (see note 1)
Overvoltage Protection
• 115-140%
Short Circuit Protection
• Continuous
Thermal Shutdown
• Case temperature >105 °C
Temperature
• ±0.03%/°C
Coefficient
Current Limit
• 110-140% nominal output for 75 & 150 W
110-160% nominal output for 100 W
110-150% nominal output for 200 W
105-140% nominal output for 350 W
Remote On/Off
• See notes 2 & 3
Remote Sense
• Compensates up to 10% of Vout nominal,
total of output trim and remote sense
Output Voltage Trim
Initial Set Accuracy
Line Regulation
• 10
7
Ω
• QSB75-200: 100 pF typical,
QSB350: 1000 pF typical
• QSB75: 300 kHz typical
QSB100, 150 & 200: 250 kHz typical
QSB350 (3V3 & 5 V): 300 kHz typical
QSB350 (12, 24 & 28 V): 330 kHz typical
• QSB75: 45.4 W/in
3
, QSB100: 60.5 W/in
3
,
QSB150: 57.2 W/in
3
, QSB200: 70.3 W/in
3
,
QSB350: 123.0 W/in
3
• QSB75 & 100: 730 kHrs
QSB150 & 200: 1 MHrs
QSB350: 658 kHrs
typical to MIL-HDBK-217F at 25 °C, GB
Environmental
Operating Base Plate
Temperature
Storage Temperature
Operating Humidity
Cooling
• -40 °C to +100 °C, see derating curves
• -55 °C to +105 °C
• Up to 90% non-condensing
• Base plate cooled, see derating curves
EMC & Safety
Emissions
• EN55022, level A conducted with external
components, see test reports for further
details
• EN61000-4-2, level 2, Perf Criteria B
• EN61000-4-3, 3 V/m, Perf Criteria A
• EN61000-4-4, level 1, Perf Criteria A
• EN61000-4-5, level 1, Perf Criteria A
• EN61000-4-6, 3 V rms
Perf Criteria A
• QSB150 & QSB200: UL60950-1
ESD Immunity
Radiated Immunity
EFT/Burst
Surge
Conducted Immunity
Safety Approvals
Models and Ratings
Input Voltage
Output Voltage
3.3 V
9-36 VDC
(24 V nominal)
5.0 V
12.0 V
15.0 V
24.0 V
3.3 V
18-75 VDC
(48 V nominal)
5.0 V
12.0 V
15.0 V
24.0 V
3.3 V
9-36 VDC
(24 V nominal)
5.0 V
12.0 V
15.0 V
24.0 V
3.3 V
18-75 VDC
(48 V nominal)
5.0 V
12.0 V
15.0 V
24.0 V
Output Current
12.00 A
12.00 A
6.25 A
5.00 A
3.12 A
12.00 A
12.00 A
6.25 A
5.00 A
3.12 A
30.00 A
20.00 A
8.30 A
6.70 A
4.17 A
30.00 A
20.00 A
8.30 A
6.70 A
4.17 A
Input Current
(4)
No Load
50 mA
50 mA
50 mA
50 mA
50 mA
30 mA
30 mA
30 mA
30 mA
30 mA
120 mA
120 mA
80 mA
80 mA
80 mA
60 mA
60 mA
30 mA
30 mA
30 mA
Full Load
2.04 A
2.98 A
3.64 A
3.64 A
3.63 A
1.10 A
1.47 A
1.82 A
1.80 A
1.80 A
4.80 A
4.82 A
4.80 A
4.84 A
4.79 A
2.37 A
2.37 A
2.36 A
2.38 A
2.37 A
QSB75/100
Efficiency
81.0%
84.0%
86.0%
86.0%
86.0%
82.0%
85.0%
86.0%
87.0%
87.0%
86.0%
86.5%
86.5%
86.5%
87.0%
88.0%
88.0%
88.0%
88.0%
88.0%
Model Number
(3)
QSB7524S3V3
QSB7524S05
QSB7524S12
QSB7524S15
QSB7524S24
QSB7548S3V3
QSB7548S05
QSB7548S12
QSB7548S15
QSB7548S24
QSB10024S3V3
QSB10024S05
QSB10024S12
QSB10024S15
QSB10024S24
QSB10048S3V3
QSB10048S05
QSB10048S12
QSB10048S15
QSB10048S24
DC-DC
Notes
1. Ripple & noise is measured with a 10 µF tantalum capacitor and 1.0 µF ceramic
capacitor across output.
2. Logic compatibility: Ref to -ve input. Module On = open circuit.
Module Off = <0.8 VDC.
3. Add suffix ‘N’ to the model number to receive the unit with negative logic
Remote On/Off.
4. Input current specified at 24 V for 9-36 VDC and 48 V for 18-75 VDC models.
Mechanical Details
2.28 (57.90)
2.00 (50.80)
1.14 (28.96)
Mounting hole diameter:
0.126 (3.2) clearance hole
4
5
6
7
8
1.45
(36.8)
0.60
(15.24)
1.03
(26.2)
0.73
(18.42)
3
2
1
BOTTOM VIEW
0.60
(15.24)
0.30
(7.62)
1.86 (47.20)
ø
0.040
(1.02)
Pins 1,2,3,5,6,7
ø
0.059
(1.50)
Pins 4,8
Pin
1
2
3
4
5
6
7
8
Notes
PIN CONNECTIONS
Function
+Vin
Remote On/Off
-Vin
-Vout
-Sense
Trim
+Sense
+Vout
0.16
(4.1) min.
0.50
(12.70)
1. Dimensions are in inches (mm)
2. Tolerances: X.XX = ±0.02 (X.X = ±0.5)
X.XXX = ±0.01 (X.XX = ±0.25)
3. Weight: 0.15 lbs (66 g) approx
Thermal Resistance Information
Derating Curve
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
Maximum Power Dissipation vs Ambient Temperature and Air Flow without heatsink
Natural Convection
20 ft./min. (0.1 m/s)
100 ft./min. (0.5 m/s)
200 ft./min. (1.0 m/s)
300 ft./min. (1.5 m/s)
Air Flow Rate
Natural Convection
20 ft. / min (0.1 ms)
100 ft./min (0.5 ms)
200 ft./min (1.0 ms)
300 ft./min (1.5 ms)
400 ft./min (2.0 ms)
Power Dissipated ,Pd (W)
Typical R
ca
10.1 °C/W
8.0
5.4
4.4
3.4
°C/W
°C/W
°C/W
°C/W
400 ft./min. (2.0 m/s)
R
ca
= Thermal resistance case to ambient
0
10
20
30
40
50
60
70
80
90
100
Ambient Temperature ,Ta (ºC)
DC-DC
Models & Ratings
Input Voltage
Output Voltage
3.3 V
5.0 V
12.0 V
15.0 V
24.0 V
3.3 V
5.0 V
12.0 V
15.0 V
24.0 V
3.3 V
5.0 V
12.0 V
15.0 V
24.0 V
3.3 V
5.0 V
12.0 V
15.0 V
24.0 V
3.3 V
5.0 V
12.0 V
24.0 V
28.0 V
48.0 V
3.3 V
5.0 V
12.0 V
24.0 V
28.0 V
48.0 V
Output Current
30.00
30.00
12.50
10.00
6.50
30.00
30.00
12.50
10.00
6.50
50.00
40.00
16.70
13.30
8.30
40.00
40.00
16.70
13.30
8.30
70.0
70.0
29.2
14.6
12.5
7.3
70.0
70.0
29.2
14.6
12.5
7.3
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Input Current
(4)
No Load
200
200
100
100
100
100
100
50
50
50
150
150
100
100
100
80
80
60
60
60
130
250
220
40
50
60
80
120
100
40
30
60
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
Full Load
4.75 A
7.19 A
7.10 A
7.19 A
7.34 A
2.34
3.47
3.44
3.47
3.61
A
A
A
A
A
QSB150-350
Efficiency
87.0%
87.0%
88.0%
87.0%
88.0%
88.0%
90.0%
91.0%
90.0%
90.0%
87.0%
87.0%
86.0%
86.0%
87.0%
88.0%
89.0%
88.0%
88.0%
88.0%
88.0 %
89.5 %
91.5%
90.0%
91.0%
90.0%
89.0%
91.0%
92.5%
91.5%
92.5%
92.0%
Model Number
(3)
QSB15024S3V3
QSB15024S05
QSB15024S12
QSB15024S15
QSB15024S24
QSB15048S3V3
QSB15048S05
QSB15048S12
QSB15048S15
QSB15048S24
QSB20024S3V3
QSB20024S05
QSB20024S12
QSB20024S15
QSB20024S24
QSB20048S3V3
QSB20048S05
QSB20048S12
QSB20048S15
QSB20048S24
QSB35024S3V3
QSB35024S05
QSB35024S12
QSB35024S24
QSB35024S28
(5)
QSB35024S48
(5)
QSB35048S3V3
QSB35048S05
QSB35048S12
QSB35048S24
QSB35048S28
(5)
QSB35048S48
(5)
9-36 VDC
(24 V nominal)
18-75 VDC
(48 V nominal)
10-36 VDC
(24 V nominal)
7.90 A
9.58 A
9.71 A
9.67 A
9.54 A
3.13 A
4.69 A
4.74 A
4.72 A
7.72 A
10.94 A
16.29 A
15.96 A
16.22 A
16.03 A
16.22 A
5.41 A
8.01 A
7.89 A
7.98 A
7.88 A
7.93 A
18-75 VDC
(48 V nominal)
18-36 VDC
(24 V nominal)
36-75 VDC
(48 V nominal)
Notes
1. Ripple & noise is measured with a 10 µF tantalum capacitor and 1.0 µF ceramic
capacitor across output.
2. Logic compatibility: Ref to -ve input. Module On = open circuit.
Module Off = <0.8 VDC.
3. Add suffix ‘N’ to the model number to receive the unit with negative logic
Remote On/Off.
4. Input current specified at 24 V for 10-36 VDC models and 48 V for
18-75 VDC models.
5. Add an external capacitor of 100 µF minimum to the output terminals, in order to
maintain the specified regulation.
Mechanical Details
Mounting hole diameter:
0.126 (3.2) clearance hole
1.14
(29.0)
ø 0.08
(2.03)
Pins 1,4,
5&9
0.18 min.
(4.6)
4
1.40
(35.6)
2.00
(50.8)
0.60
(15.2)
2
1
3
BOTTOM VIEW
5
6
7
8
9
1.20
(30.5)
2.40
(61.0)
ø 0.04
(1.02)
Pins 2,3,
6,7 & 8
0.52
(13.2)
SIDE VIEW
Pin
1
2
3
4
5
6
7
8
9
PIN CONNECTIONS
Function
+Vin
Remote On/Off
Case
-Vin
-Vout
-Sense
Trim
+Sense
+Vout
1.90
(48.3)
2.28
(57.9)
Notes
1. Dimensions are in inches (mm)
2. Tolerances: X.XX = ±0.02 (X.X = ±0.5)
X.XXX = ±0.01 (X.XX = ±0.25)
4
3. Weight: 0.25 lbs (114 g) approx
Thermal Resistance Information
Derating Curve
Maximum Power Dissipation vs Ambient Temperature and Air Flow without heatsink
Natural Convection
20 ft./min. (0.1 m/s)
100 ft./min. (0.5 m/s)
200 ft./min. (1.0 m/s)
300 ft./min. (1.5 m/s)
400 ft./min. (2.0 m/s)
500 ft./min. (2.5 m/s)
600 ft./min. (3.0 m/s)
700 ft./min. (3.5 m/s)
800 ft./min. (4.0 m/s)
0
10
20
30
40
50
60
70
80
90
100
QSB150-350
DC-DC
50
45
40
Power Dissipated ,Pd (W)
35
30
25
20
15
10
5
0
Air Flow Rate
Natural Convection
20 ft. / min (0.1 ms)
100 ft./min (0.5 ms)
200 ft./min (1.0 ms)
300 ft./min (1.5 ms)
400 ft./min (2.0 ms)
500 ft./min (2.5 ms)
600 ft./min (3.0 ms)
700 ft./min (3.5 ms)
800 ft./min (4.0 ms)
Typical R
ca
7.12 °C/W
6.21 °C/W
5.17 °C/W
4.29 °C/W
3.64 °C/W
2.96 °C/W
2.53 °C/W
2.37 °C/W
2.19 °C/W
R
ca
= Thermal resistance case to ambient
Ambient Temperature ,Ta (ºC)
Application Notes
Output Voltage Trim - QSB75 & QSB150 Series
Voltage trim up
Connect trim resistor Rtrim between Trim pin and -Sense pin.
Voltage trim down
Connect trim resistor Rtrim between Trim pin and +Sense pin
R2
R1 Vr - Vf R2 + R3
R trim up =
V
des
- V
nom
-
R2 x R3
(kΩ)
R2 + R3
R trim down =
R1 x (V
des
- Vr)
V
nom
- V
des
- R2 (kΩ)
Where:
R trim up/down is the external resistor in kΩ. Vnom is the nominal output voltage. Vdes is the desired output voltage. R1, R2, R3 and Vr
are internal to the unit and are defined in the table below.
Output Voltage (V)
3.3 V
5.0 V
12.0 V
15.0 V
24.0 V
R1(kΩ)
3.00
2.32
9.10
12.0
20.0
R2 (kΩ)
12.0
3.3
51.0
56.0
100.0
R3 (kΩ)
4.3
0.0
5.1
8.25
7.5
Vr (V)
1.24
2.5
2.5
2.5
2.5
Vf (V)
0.46
0.0
0.46
0.46
0.46
Output Voltage Trim - QSB100, QSB200 & QSB350 Series
Voltage trim down -
Connect trim resistor Rtrim between Trim pin
and –Sense pin
Voltage trim up -
Voltage trim up, Connect trim resistor
Rtrim between Trim pin and +Sense pin.
R trim down = 511 - 10.22 kΩ
%
Where:
%=
R trim up =
Where:
%=
5.11 V
nom
(100 + %)
511
-
-
10.22
kΩ
k x
%
%
V
nom
- V
des
V
nom
V
des -
V
nom
V
nom
Value
k
x 100
QSB100/200
1.225
QSB350
1.24
x 100
) x Vf
03 July 18
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