Input:
Outputs:
Current:
Package:
36-75 V
5.0 V/ 3.3 V
10 A
Quarter-brick
Technical Specification
In the event of a gradual loss of input voltage (see Figure C), the
main -48V output will shut down 100ms after the beginning of
the hold-up event. The -48V output will enter a hiccup mode of
operation for input voltages below the Hold-up Arm Threshold.
Management power will continue to run until the input voltage
(plus 0V to 1.2V for the ORing MOSFETs) decays to the manage-
ment power under-voltage turn-off threshold.
Hot Swap – Shutdown Timing: In the event of a sudden loss
of input voltage (see Figure B), a hold-up event will be triggered.
When the output voltage (plus a diode drop for the hot-swap body
diode) decays to the management power under-voltage turn-off
threshold, the main -48V output and the 3.3V/5.0V outputs will
shut down simultaneously.
48V
Input voltage
0
Holdup time, tH
Holdup event
48V
0
39 V
typ.
(Depends
on version)
34.6 V
typ.
Payload output 48V
3.3V
0
Management power
Alarm
(Pull-up voltage lost)
0
Figure B: Sudden Loss of Input Power
48V
38.4 V
typ.
38.9 V
typ.
34.0
(Depends
on version)
Higher of A/B input feed voltages
RTN A/B - (-48V_A/B)
V
0
Holdup event
48V
Output is off after
delay if input
38.5 V
typical
(Depends
on version)
voltage doesn’t
recover above
38.9V typ.
-48V output voltage
VRTNOUT - (-48V_OUT)
100ms
0
Management power turned
3.3V
off at higher of ENABLE
threshold or MP UVLO.
Management power output
(3.3V) - LOGIC_GND
0
Alarm - (LOGIC_GND)
(Pullup voltage lost)
Figure C: Gradual Loss of Input Power
Product # IQ65033QMA10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-IQ5033S Rev. G
05/04/09
Page 10
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