xppower.com
300 Watts
QSB Series
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Wide Input Range
350 W Peak Power
High Efficiency
High Power Density
Baseplateꢀcooled
Remote On/Off & Remote Sense
3 Year Warranty
Specification
Input
General
Input Voltage Range
Input Current
• 24 V (9-36 V), 48 V (18-75 V), (see note 3)
• See table
Efficiency
• See table
Isolation Voltage
• 1500 VDC Input to Output
1500 VDC Input to Case
1500 VDC Output to Case
Input Reverse Voltage • None
Protection
7
Isolation Resistance
Isolation Capacitance • 2000 pF typical
Switching Frequency
Power Density
MTBF
• 10 Ω
Input Filter
Input Surge
• Pi network
• 24 V: 50 VDC for 100 ms
48 V: 100 VDC for 100 ms
• 220 kHz typical
3
Undervoltage Lockout • 24 V: On ≥8.8 V, Off ≤8.0 V
• 109 W/in
48 V: On ≥17.0 V, Off ≤16.0 V
• 300 kHrs typical to MIL-HDBK-217F
at 25 °C, GB
Output
Environmental
Output Voltage Trim
Initial Set Accuracy
Line Regulation
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10ꢀ, see application notes
1.5ꢀ max at full load
0.2ꢀ max measured from high line
to low line
Operating Base Plate • -40 °C to +100 °C, see derating curve
Temperature
Storage Temperature • -55 °C to +105 °C
Load Regulation
Start Up Time
•
0.2ꢀ max measured from 0-100ꢀ load
Operating Humidity
Cooling
• Up to 90ꢀ non-condensing
• Baseplate-cooled, see derating curve
• 120 ms typical
Transient Response
• 5ꢀ max deviation, recovery to within
1ꢀ in 500 µs, 25ꢀ step load change
Shock
• 30 g pk, halfsink wave for 18 ms
3 pulses per face, all 6 faces tested
Ripple & Noise
• 3.3 & 5 V models: 100 mV pk-pk
12 & 15 V models: 150 mV pk-pk
24 & 28 V models: 280 mV pk-pk
20 MHz bandwidth (see note 1)
Vibration
• 5-500 Hz st 3 g, 10 mins per axis
EMC & Safety
Emissions
• EN55022, level A conducted, with external
components. See application note.
Overvoltage Protection • 115-140ꢀ
Short Circuit Protection • Continuous
Thermal Shutdown
ESD Immunity
Radiated Immunity
EFT/Burst
• 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
• Case temperature >105 °C
• 0.03ꢀ/°C
Temperature
Coefficient
Surge
Current Limit
• 115-140ꢀ nominal output
• See note 2. Output is off if Pin 2 is low
(<1.8 V) WRT -VIN, Pin 4.
Conducted Immunity
Remote On/Off
Remote Sense
• Compensates up to 10ꢀ of Vout nominal,
total of output trim and remote sense