BQ SERIES
UP TO 100 WATTS
BQ SERIES
INDUSTRY STANDARD QUARTER BRICK
FEATURES
• High Efficiency - 86% @ 3.3V and 5V (typical)
• Overcurrent Protection
• Remote Sense
• Remote On/Off (primary referenced, negative or
positive logic)
• Output Voltage Adjustment (trim)
• Water Washable
• Heatsink Mountable
• Fixed Frequency
• UL/CUL 1950 and EN60950
• CE mark, LVD, 48Vin only * (see page 2)
THE BQ SERIES FROM WALL INDUSTRIES
The BQ Series of DC/DC Converters is a single output,
highly efficient, high reliability and low cost design, to
meet the needs of today's power requirements. The BQ
Series perform exceptionally well in Telecom, Networking
and Industrial Applications.
SPECIFICATIONS: BQ SERIES
INPUT SPECIFICATIONS
Input Voltage Range..................................................36-75VDC
Nominal Input.................................................................48VDC
Remote On/Off...........................................ref. -Vin (see note 1)
GENERAL SPECIFICATIONS
Efficiency...........................Model Specific, Consult Factory
Isolation Voltage, input to output...................1500VDC min.
Isolation Resistance.........................................100MOhms
Minimum Load..................Varies by model, consult factory
OUTPUT SPECIFICATIONS
Output
Current............................................................See table
ENVIRONMENTAL SPECIFICATIONS
Voltage
Tolerance............................................................... 1%
Line Regulation(LL-HL)..................................................... 0.1%
Load Regulation............................................................... 0.1%
Short Circuit Protection Inception.......................................125%
Overvoltage Protection......................................................120%
Ripple/Noise....................................1% Vout Nom., 20MHz BW
Operating Temperature...................-40°C to +100°C Case
Storage Temperature...............................-55°C to +125°C
Temperature Coefficient......................................0.02%/°C
Thermal Shutdown Range............................ 105 to 115°C
External Trim Voltage Range.............................................. 10%
PHYSICAL SPECIFICATIONS
Short Circuit ..............................Continuous and Auto Recovery
Switching Frequency........................5V and Lower 400kHz (typ)
Package size.....................................2.28” X 1.45” X 0.50”
All specifications apply at +25°C ambient unless otherwise noted.
6/6/02
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603 778 2300
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