pq30033ega20 SynQor Worldwide Headquarters, pq30033ega20 Datasheet - Page 13

• Manufacturer Part Number: pq30033ega20
• Description: Eighth-brick Dc/dc Converter
• Manufacturer: SynQor Worldwide Headquarters

Product # PQ30033EGA20
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
• Input Over-Voltage Shutdown (not present in Eighth-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 t
Before time t
the unit is disabled by the Input Under-Voltage Lockout feature.
echnical S
echnical S
Lockout Turn-On
Under-Voltage
ON/OFF
(pos logic)
Threshold
V out
0
V in
, when the input voltage is below the UVL threshold,
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
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.
RoHS Compliance: The EU led RoHS (Restriction of Hazardous
Substances) Directive bans the use of Lead, Cadmium,
Hexavalent Chromium, Mercury, Polybrominated Biphenyls
(PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical
and Electronic Equipment. This SynQor product is available as
5/6 RoHS compliant (product with lead) or 6/6 RoHS compliant.
For more information please refer to SynQor’s RoHS addendum
available at our RoHS Compliance / Lead Free Initiative web
page or e-mail us at [e-mail]
1
t
Doc.# 005-2EG33MU Rev. A
, the unit is disabled by the ON/OFF pin, and it cannot
2
OFF
200ms
P
P
Current:
Current:
ackage:
ackage:
ON
Output:
Output:
9ms
turn on time)
.
(typical
3/18/08
3.3 V
20 A
Eighth-brick
3.3 V
20 A
Eighth-brick
2
, the Startup Inhibit
t
Page 13