Data Sheet
QPW050/060 Series Power Modules; DC-DC converters
36-75Vdc Input; 1.2Vdc to 3.3Vdc Output
March 27, 2008
Feature Description (continued)
Output Voltage Set-Point Adjustment (Trim)
Δ% = 9.1
28V − 29.6V
Δ% =
×100
28V
Δ% = 5
⎡
⎤
⎛ 1036
⎞
⎛
⎞
R
adj − up = 10 × ⎜
+ 936⎟ KΩ
⎜
⎟
⎠
⎢
⎥
⎦
⎜
⎟
5
⎝
⎝
⎠
⎣
Rtadj-up = 11432 kΩ
5.1*3.3*
100 + 9.1
)
510
9.1
⎛
⎜
⎞
⎠
Radj − up
=
−
−10.2 KΩ
⎟
1.225*9.1
⎝
Rtadj-up = 98.47kΩ
Output Over Voltage Protection
The output overvoltage protection consists of circuitry
that monitors the voltage on the output terminals. If
the voltage on the output terminals exceeds the over
voltage protection threshold, then the module will
shutdown and latch off. The overvoltage latch is reset
by either cycling the input power for one second or by
toggling the on/off signal for one second. The
protection mechanism is such that the unit can
continue in this condition until the fault is cleared.
Over Temperature Protection
These modules feature an overtemperature protection
circuit to safeguard against thermal damage. The
circuit shuts down and latches off the module when
the maximum device reference temperature is
exceeded. The module can be restarted by cycling
the dc input power for at least one second or by
toggling the remote on/off signal for at least one
second.
Input Under/Over Voltage Lockout
At input voltages below the input undervoltage lockout
limit, the module operation is disabled. The module
will begin to operate at an input voltage above the
undervoltage lockout turn-on threshold.
LINEAGE POWER
15
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
