DC-DC
600 Watts
QSB Series
•
•
•
•
•
•
•
Up to 92% Efficiency
xppower.com
Industry Standard Full Brick Package
-40 °C to +100 °C Operating Temperature
High Power Density
Baseplate-cooled
Remote On/Off & Remote Sense
3 Year Warranty
Specification
Input
Input Voltage Range
Input Current
Idle Current
Input Reverse Voltage
Protection
Input Filter
Undervoltage Lockout
•
•
•
•
24 V (18-36 V), 48 V (36-75 V)
See table
50 mA
None
General
Efficiency
Isolation Voltage
• See tables
• 1500 VDC Input to Output
1500 VDC Input to Case
1500 VDC Output to Case
• Pi network
• 24 Vin: turn on 17.0 V, turn off 16.0 V
48 Vin: turn on 35.0 V, turn off 33.0 V
Isolation Resistance
Isolation Capacitance
Switching Frequency
DC OK Signal
Output
• 40 - 110% of nominal output, see
application notes
Initial Set Accuracy
• ±1.5% max
Line Regulation
• ±0.2% max measured from high line
to low line
Load Regulation
• ±0.5% max measured from 0-100% load
Transient Response
• 5% max deviation, recovery to within
1% in 500 µs, 25% step load change
Ripple & Noise
• 12 V models: 120 mV pk-pk
28 V models: 280 mV max pk-pk
32 V models: 320 mV max pk-pk
48 V models: 480 mV max pk-pk
20 MHz bandwidth (see note 1)
Overvoltage Protection
• 115-140%
Short Circuit Protection
• Continuous
Current Limit
• 110-150% nominal output
Thermal Shutdown
• Case temperature >110 °C typical
Temperature
• ±0.03%/°C
Coefficient
Remote On/Off
• Isolated input, can be controlled via
primary or secondary side.
Module on 1-10 mA. Internal 1KΩ resistor
fitted,
Module off < 1 mA or open circuit
Remote Sense
• Compensates up to 10% of Vout nominal,
total of output trim and remote sense
Current Share
• Parallel up to 4 modules using the PC pin
Output Voltage Trim
Power Density
MTBF
• 10
7
Ω
• 4000 pF typical
• 48 Vin: 12 V, 28 V, 32 V: 300 kHz typical
Others: 250 kHz
• DC OK TTL low, not OK TTL high, connect
IOC pin to Aux pin through a resistor
(see note 3)
• 108.7 W/in
3
• 381 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 curve
• -55 °C to +105 °C
• Up to 90% non-condensing
• Baseplate-cooled, see derating curve
EMC & Safety
Emissions
• EN55022, level A conducted, with external
components. Contact sales for details.
Models & Ratings
Input Voltage
Output Voltage
12.0 V
28.0 V
32.0 V
48.0 V
12.0 V
36-75 V
28.0 V
32.0 V
48.0 V
Output Current
50.0 A
21.5 A
19.0 A
12.5 A
50.0 A
25.0 A
19.0 A
12.5 A
Input Current
No Load
150 mA
150 mA
150 mA
200 mA
90 mA
105 mA
90 mA
130 mA
Full Load
28.09 A
27.87 A
27.84 A
27.47 A
13.89 A
16.03 A
13.77 A
13.59 A
Efficiency
89.0%
90.0%
91.0%
91.0%
90.0%
91.0%
92.0%
92.0%
QSB600
Model Number
(2)
QSB60024S12
QSB60024S28
QSB60024S32
QSB60024S48
QSB60048S12
QSB60048S28
QSB60048S32
QSB60024S48
DC-DC
18-36 V
1
Notes
1. Output Ripple and Noise measured with 10 µF tantalum and 1 µF ceramic
capacitor across output.
(
2. Add suffix ‘P’ to the model number to receive the unit with positive logic
Remote On/Off.
0
3. The auxiliary supply output is within 7-13 V with max of 20 mA (auxiliary pin 16).
Ground reference is -Sense.
Mechanical Details
4.10 (104.1)
3.35 (85.1)
8-Ø 0.04
(1.0)
8-Ø 0.08
(2.0)
16 15 14 13 12 11
1
1.70
(43.2)
1.30
(33.0)
2
3
4
4 x Mounting Holes, 3.5 mm
BOTTOM VIEW
1.40
(35.6)
2.00
(50.8)
2.25
(57.2)
2.40
(61.0)
0.20 (5.1)
0.90 (22.9)
0.75 (19.1)
0.20 (5.1)
4.20 (106.7)
0.40 (10.2)
0.90 (22.9)
0.50 (12.7)
Pin
1
2
3
4
5-7
8-10
11
12
13
14
15
16
Notes
PIN CONNECTIONS
Function
-Vin
+Vin
-On/Off
+On/Off
+Vout
-Vout
-Sense
+Sense
Trim
PC
IOC
Aux
0.22
(5.5)
0.50
(12.7)
4.60 (116.8)
1. All dimensions are in inches (mm)
2. Weight: 0.49 lbs (220 g) approx
3. Tolerances: X.XX = ±0.02 (X.X = ±0.5)
X.XXX = ±0.01 (X.XX = ±0.25)
Output Voltage Adjustment - QSB600
The trim pin permits the user to adjust the output voltage up or down
according to the trim range specification (-60% to +10% of nominal
output). This is accomplished by connecting resistor Rv between the +Vout
and +Sense pins and a resistor R
trim
between the trim and -Sense pins.
See longform datasheet for connection diagram. The trim pin should be left
open if trimming is not being used. The trim resistor can be determined by
the following equations:
Thermal Resistance Information
Derating Curve
Maximum Power Dissipation vs Ambient Temperature and Air Flow without heatsink
90
80
70
Vf =
1.24 x
7.68 +
Rtrim x 33
Rtrim + 33
Rtrim x 33
Rtrim + 33
R
v
: Variable Resistor, KΩ
Rtrim: KΩ, 6.2 kΩ recommended
Vo: Nominal Output Voltage
Vtrim = (Vo + R
v
) x Vf
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)
D
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
60
50
40
30
20
10
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
3.82 °C/W
3.23
2.71
2.28
1.92
1.68
1.50
1.35
1.23
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Power Dissipated ,Pd (W)
R
ca
= Thermal resistance from case to ambient
Ambient Temperature ,Ta (ºC)
08 Aug 17
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