QM48T14120-NDB0G POWER ONE, QM48T14120-NDB0G Datasheet - Page 7

• Manufacturer Part Number: QM48T14120-NDB0G
• Description: DC/DC Converters & Regulators
• Manufacturer: POWER ONE
• Type: Step Downr

Specifications of QM48T14120-NDB0G

• Output Power: 168W
• Output Current: 14A
• Input Voltage: 48V
• Output Voltage: 12V
• Screening Level: Industrial
• Product Length (mm): 36.83mm
• Product Height (mm): 7.08mm
• Product Depth (mm): 58.42mm
• Mounting Style: Through Hole
• Pin Count: 8
• Number Of Outputs: 1
• Package / Case: Quarter-Brick
• Product: Isolated
• Input Voltage Range: 36 V to 75 V
• Input Voltage (nominal): 48 V
• Output Voltage (channel 1): 12 V
• Output Current (channel 1): 14 A
• Isolation Voltage: 2000 V
• Package / Case Size: Quarter Brick
• Lead Free Status / RoHS Status: Compliant
• Lead Free Status / RoHS Status: Compliant

Startup Information (using negative ON/OFF)
Scenario #1: Initial Startup From Bulk Supply
ON/OFF function enabled, converter started via application
of V
For this example, the total converter startup time (t
typically 4 ms.
Scenario #2: Initial Startup Using ON/OFF Pin
With V
ON/OFF pin. See Figure F.
For this example, the total converter startup time (t
typically 4 ms.
Scenario #3: Turn-off and Restart Using ON/OFF Pin
With V
then enabled via ON/OFF pin. See Figure G.
For the condition, (t
startup time (t
startup will be typically 4 ms after release of ON/OFF pin.
ZD-00376 Rev. 1.1.1, 19-Feb-10
Time
Time
Time
t
t
t
t
t
t
t
t
t
t
t
t
t
t
0
1
2
3
4
5
IN
0
1
2
3
0
1
2
3
. See Figure E.
IN
IN
previously powered, converter started via
previously powered, converter is disabled and
V
ON.
ON/OFF pin arbitrarily disabled; converter
output falls to zero; turn-on inhibit delay period
(200 ms typical) is initiated, and ON/OFF pin
action is internally inhibited.
ON/OFF pin is externally re-enabled.
Turn-on inhibit delay period ends. If ON/OFF pin
is ON, converter begins turn-on; if off, converter
awaits ON/OFF pin ON signal; see Figure F.
End of converter turn-on delay.
Converter V
ON/OFF pin is ON; system front end power is
toggled on, V
V
circuit threshold; converter enabled.
Converter begins to respond to turn-on
command (converter turn-on delay).
Converter V
V
Arbitrary time when ON/OFF pin is enabled
(converter enabled).
End of converter turn-on delay.
Converter V
IN
IN
INPUT
5
and V
crosses undervoltage Lockout protection
- t
If (t
ON/OFF pin is locked out by startup inhibit
timer.
If (t
internally enabled.
2
) is typically 104 ms. For (t
at nominal value.
2
2
2
- t
- t
OUT
- t
1
1
) ≤ 100 ms, external action of
) > 100 ms, ON/OFF pin action is
OUT
1
OUT
OUT
) ≤ 100 ms, the total converter
are at nominal values; ON/OFF pin
IN
to converter begins to rise.
reaches 100% of nominal value.
reaches 100% of nominal value.
reaches 100% of nominal value.
Comments
Comments
Comments
2
- t
1
) > 100 ms,
3
3
- t
- t
QM48T/S14120 DC-DC Converter Data Sheet
1
1
) is
) is
Page 7 of 20
36-75 VDC Input; 12 VDC @ 14 A Output
ON/OFF
ON/OFF
ON/OFF
STATE
STATE
STATE OFF
V
V
V
OUT
OUT
OUT
V
V
V
IN
IN
IN
t
t
0
0
OFF
OFF
ON
ON
ON
t
1
t
2
t
t
Fig. G: Startup scenario #3.
Fig. E: Startup scenario #1.
Fig. F: Startup scenario #2.
3
1
t
0
t
2
t
1
100 ms
t
2
t
3
t
3
t
4
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t
5
t
t
t