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LPQ SERIES
FEATURES
* * * * * * * * * * * * * * * Low profile, single board construction Very high efficiency Remote Sense Remote On/Off (negative or positive logic) Output Voltage Adjustment (industry standard) Water Washable Constant Frequency Overcurrent/short circuit protection Low cost, high performance No load operation Input undervoltage lockout Thermal shutdown Overvoltage protection No external filtering required Startup into pre-biased load
UP TO 75 WATTS
THE LPQ SERIES FROM WALL INDUSTRIES
Using industry standard quarter brick pin-out, the LPQ series is a single board construction low profile dc/dc converter. Key features are very high efficiency and low cost. This product offers great performance in networking, telecom, and industrial applications.
SPECIFICATIONS: LPQ SERIES
INPUT SPECIFICATIONS
Input Voltage Range..................................................36-75VDC Input filter........................................................................Pi type UVLO..........................................................................33V Typ. Logic Enable................................................positive or negative
GENERAL SPECIFICATIONS
Efficiency...........................................................up to 92% Isolation Voltage (input to output).........................1500VDC Isolation Resistance.........................................100MOhms Switching Frequency............................................350 KHz
OUTPUT SPECIFICATIONS
Output Current............................................................See table Voltage Accuracy................................................................1% Line Regulation(LL-HL).......................................................0.1% Load Regulation................................................................0.2% Short Circuit Protection..............................................continuous Ripple/Noise (20MHz BW)...........................................100mVpp Transient Repsonse (25% load step)..............100 us (to 1% Vout) Overvoltage Protection.......................................................125% Output Trim.......................................................................10% Power Foldback..................................................130% rated Po Minimum Load Required....................................................None
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature........................-40C to +125C Tj Storage Temperature...............................-50C to +125C Humidity (non-condensing)..........................................95% Thermal Shutdown.........................................115C (PCB)
PHYSICAL SPECIFICATIONS
Package size.....................................1.45" X 2.28" X 0.45" Weight..............................................................1.0 oz. typ. Pinout....................................................Industry Standard
All specifications apply at 25C ambient, unless otherwise noted. Due to advances in technology, specifications subject to change without notice.
11/16/02
1
603 778 2300
WWW.WALLINDUSTRIES.COM
UP TO 75 WATTS
LPQ SERIES
Input Voltage
36-75
Output Voltage
1.8 2 2.5 3.3 5 1.8 2 2.5 3.3 5
Output Current
10A 10A 10A 10A 10A 15A 15A 15A 15A 15A
Model Number
LPQ48S1.8-18 LPQ48S2-20 LPQ48S2.5-25 LPQ48S3.3-33 LPQ48S5-50 LPQ48S1.8-27 LPQ48S2-30 LPQ48S2.5-38 LPQ48S3.3-50 LPQ48S5-75
NOTES:
1) For negative logic, Remote ON/OFF, add "R" suffix 2) For other input voltages, please contact the factory at 1 (888) 597-WALL.
11/16/02
WWW.WALLINDUSTRIES.COM
603 778 2300
2

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