# ALQ25B50 DC Transformer

## General Features

· Power: 300 Watts
· Input Voltage: 42 to 53 VDC
· Output Voltage: 12.0V
· Output Current: 0A to 25A (max)
· Efficiency: 96% Typical
· Package: Industry standard Qtr Brick (1.48" x 2.30" x 0.40")
· Ambient Operating Temperature: -40°C to +100°C
· Storage Temperature: -55°C to +125°C
· MTBF: > 1 million hours
· Warranty: 1 year



## Electrical Specifications

· Input UVLO Range: 39V to 42V
· Over Voltage Protection: 60V
· Line Regulation: 10.25V to 13.60V (8.50V to 40 13.60V for “-AL” option)
· Load Regulation: ±3% Vo (Typical)
· Noise/Ripple: 100mV (Typical)
· Transient Response: 200mV typical deviation (50% to 75% Load Change), 100µs max recovery time
· Over Current Limit: 115% I O,MAX typical (latching)
· Switching Frequency: 800kHz
· Isolation Voltage: 2000Vdc max



## Control & Options

· Enable: TTL compatible (Positive or Negative Logic)
· -N: Negative logic enable
· -6: 3.7mm pin length (Standard: 5mm)
· -AL: Autorecovery mode, lower UVLO range (34V to 36Vdc), 36V to 53V input voltage range



## Ordering Information

· ALQ25B50: 42V to 53V input, 12.0V output, 25A
· ALQ25B50-6: Same as above
· ALQ25B50N: Same as above with negative enable
· ALQ25B50N-6: Same as above with negative enable and shorter pins
· ALQ25B50N-AL: Autorecovery, lower UVLO, 36V-53V input



## Physical Characteristics

· Pin Placement Tolerance: ± 0.005(0.127)
· Mechanical Tolerance: ± .002(0.5)
· All dimensions in inches (millimeters)