pq30033qga30 SynQor Worldwide Headquarters, pq30033qga30 Datasheet - Page 13

• Manufacturer Part Number: pq30033qga30
• Description: Quarter-brick Dc/dc Converter
• Manufacturer: SynQor Worldwide Headquarters

Product # PQ30033QGA30
T
T
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
• 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 t
echnical S
echnical S
Lockout Turn-On
Under-Voltage
ON/OFF
(pos logic)
Threshold
V out
V in
Figure F: Startup Inhibit Period (turn-on time not to scale)
ON
0
pecification
pecification
t
, t
0
1
(typical start-up
inhibit period)
, and t
200ms
Phone [phone]
2
:
www.synqor.com
t
1
OFF
200ms
ON
Before time t
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 t
be enabled again until the Startup Inhibit Period has elapsed.
When the ON/OFF pin goes high after t
Period has elapsed, and the output turns on within the typical
Turn-On Time.
1
t
Doc.# 005-2QG33MU Rev. A
, the unit is disabled by the ON/OFF pin, and it cannot
2
OFF
0
, when the input voltage is below the UVL threshold,
200ms
P
P
Current:
Current:
ackage:
ackage:
ON
Output:
Output:
Input:
Input:
4ms
turn on time)
(typical
07/11/05
19-60 V
3.3 V
30 A
Quarter-brick
19-60 V
3.3 V
30 A
Quarter-brick
2
, the Startup Inhibit
t
Page 13