PQ60525HTA04 Datasheet, PDF (12/14 Pages) SynQor Worldwide Headquarters – Half-brick DC/DC Converter

Technical Specification
Input: 35-75 V
Output: 52.5 V
Current: 3.8 A (200W)
Package: Half-brick
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 200ms when it is
shut down for any reason. When an output short is present, this
generates a 5Hz "hiccup mode," which prevents the converter
from overheating. In all, there are seven ways that the converter
can be shut down, initiating a Startup Inhibit Period:
• Input Under-Voltage Lockout
• Input Over-Voltage Shutdown (not present in Quarter-brick)
• Output Over-Voltage Protection
• Over Temperature Shutdown
• Current Limit
• Short Circuit Protection
• Turned off by the ON/OFF input
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t₀, t₁, and t₂:
Before time t₀, when the input voltage is below the UVL threshold,
the unit is disabled by the Input Under-Voltage Lockout feature.
When the input voltage rises above the UVL threshold, the Input
Under-Voltage Lockout is released, and a Startup Inhibit Period is
initiated. At the end of this delay, the ON/OFF pin is evaluated,
and since it is active, the unit turns on.
At time t₁, the unit is disabled by the ON/OFF pin, and it cannot
be enabled again until the Startup Inhibit Period has elapsed.
When the ON/OFF pin goes high after t₂, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-On Time.
FULL FEATURE APPLICATION NOTES
This section provides some basic application information for the
full-feature version of the PowerQor series converter. The pin-out
configuration for these optional feature pins is shown on page 2,
and the part numbering format is shown on the last page of this
specification sheet.
All units in this product family include back-drive protection to
simplify the use of multiple converters in a parallel or sequencing
application. However, any voltage applied to the output of the
converter should be kept below 120% of the rated output voltage
of the converter.
In addition to back-drive protection, these units include the fol-
lowing features (pins):
Current Share (pin 3): The active current share feature allows
for N+1 and parallel applications. To achieve load sharing,
directly connect the I share pins of multiple units. The load current
will share equally among the multiple units (±5% at full rated cur-
rent). It is important that the Vin(-) pins of the sharing units be
directly connected and NOT placed outside of an EMI filter or
other impedance path. The voltage at the I Share pin will range
from 0 to 5 volts (at full rated current), referenced to the primary-
Vin
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
ON
OFF ON
OFF
ON
Vout
200ms
(typical start-up
inhibit period)
200ms
200ms
25ms (typical
turn on time)
t₀
t₁
t₂
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ60525HTA04
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www.synqor.com
Doc.# 005-2HT652F Rev. B
t
03/08/04
Page 12