IQ65033QMA10ENF-G SYNQOR, IQ65033QMA10ENF-G Datasheet - Page 8

• Manufacturer Part Number: IQ65033QMA10ENF-G
• Description: InQor DC/DC Converters
• Manufacturer: SYNQOR

Specifications of IQ65033QMA10ENF-G

• Dc / Dc Converter O/p Type: Fixed
• No. Of Outputs: 2
• Input Voltage: 36V To 75V
• Output Voltage: 5V
• Output Current: 10A
• Output Voltage 2: 3.3V
• Approval Bodies: UL, CUL, TUV, IEC
• Supply Voltage: 48V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Product # IQ65033QMA10
Input ORing MOSFETs: ORing of dual -48V feeds is provided
by four MOSFETs, which are individually controlled so as to oper-
ate as an ideal diode (see Figure A). If there is an input feed short
of any kind, a control circuit will detect reverse current and turn
off the MOSFET in 250ns (typ.), to avoid disturbing the other feed
voltage. At zero current, the MOSFET is guaranteed to be off. In
the case of a fuse failure, this triggers the ALARM output, due to an
apparent input feed loss. Current hysteresis prevents limit cycling
around the transition point between body diode and MOSFET
conduction.
ALARM Output: The ALARM pin gives an external indication
of a fault condition. It is an isolated and buffered open-collector
output, which is normally pulled low. In the presence of an input
feed loss (which can be caused by a fuse failure), the ALARM out-
put will be tri-stated.
Figure A: Internal Block Diagram
FEATURE DESCRIPTIONS
Technical Specification
4
5
6
3
1
2
7
VRTN_B
VRTN_A
ENABLE_A
ENABLE_B
-48_A
-48_B
SHELF_GND
C
D
control
control
FET
FET
control
control
FET
FET
Phone [phone]
A
B
E
F
C
D
A
B
E
Enable Logic
Monitoring
EMI Filter
circuits
F
10
www.synqor.com
11
E
F
12
sense
dV/dt
1
4
External Input Fuse Failure Detection: At zero current, the
input ORing MOSFETs are guaranteed to be off. In the case of a
fuse failure, an on-board bleed resistor pulls the input feed voltage
down. This triggers the ALARM output due to an apparent input
feed loss. There are two main down-sides to this approach. First,
there is no way to distinguish between a feed loss and a fuse fail-
ure. Second, an enable fuse loss is not detected, since the enables
are diode OR’d.
The full featured version of the iQor offers additional data report-
ing that makes full fuse detection possible. Among other data,
each feed voltage and each enable voltage is reported through
the I
reported by the shelf manager to determine whether any board
fuse is blown.
1
sense
3
Temp
2
C port. These voltages can be compared with the voltages
Doc.# 005-IQ5033S Rev. H
Control Logic
Hot Swap
Management
converter
Power
connect control
Hold-up
circuits
Package:
Outputs:
Current:
Input:
controlled hold-
up charging
converter
Current-
charge
Isolation barrier
Dis-
05/27/10
36-75 V
5.0 V/ 3.3 V
10 A
Quarter-brick
VRTN_OUT
-48V_OUT
HU_TRIM
HU_CAP
3.3V
5.0 V
18
17
16
15
9
8
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