UCQ-3.3/30-D48PB-C Murata Power Solutions Inc, UCQ-3.3/30-D48PB-C Datasheet - Page 11

• Manufacturer Part Number: UCQ-3.3/30-D48PB-C
• Description: CONVERTER, DC/DC, 3.3V, 30A, Q-BRICK
• Manufacturer: Murata Power Solutions Inc

Specifications of UCQ-3.3/30-D48PB-C

• Output Type: Quarter-Brick
• No. Of Output Channels: 1
• Input Voltage: 36V To 75V
• Power Rating: 99W
• Output Voltage: 3.3V
• Output Current: 30A
• Supply Voltage: 48V
• Dc / Dc Converter Case Style: Quarter
• Dc / Dc Converter O/p Type: Quarter-Brick
• No. Of Outputs: 1
• Approval Bodies: EN / IEC / UL
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

cause the over-voltage protection circuitry to activate (see Performance Speci-
fications for over-voltage limits). Power derating is based on maximum output
current and voltage at the converter’s output pins. Use of trim and sense func-
tions can cause output voltages to increase, thereby increasing output power
beyond the converter’s specified rating, or cause output voltages to climb into
the output over-voltage region. Therefore, the designer must ensure:
Trimming Output Voltage
UCQ converters have a trim capability (pin 6) that enables users to adjust the
output voltage (refer to the trim equations and trim graphs that follow). Adjust-
ments to the output voltage can be accomplished via a trim pot (Figure 5) or
a single fixed resistor as shown in Figures 6 and 7. A single fixed resistor can
increase or decrease the output voltage depending on its connection. Resistors
should be located close to the converter and have TCR’s less than 100ppm/°C
to minimize sensitivity to changes in temperature. If the trim function is not
used, leave the trim pin open.
Figure 6. Trim Connections To Increase Output Voltages Using Fixed Resistors
(V
OUT
at pins) x (I
Figure 5. Trim Connections Using A Trimpot
OUT
) ≤ rated output power
www.murata-ps.com
will increase the output voltage. A resistor connected from the Trim Pin (pin 6)
to the –Sense (pin 5) will decrease the output voltage.
affect on the converter’s performance and are not recommended. Excessive
voltage differences between V
ment of the output voltage, can cause the over-voltage protection circuitry to
activate (see Performance Specifications for over-voltage limits). Temperature/
power derating is based on maximum output current and voltage at the
converter’s output pins. Use of the trim and sense functions can cause output
voltages to increase, thereby increasing output power beyond the converter’s
specified rating, or cause output voltages to climb into the output over-voltage
region. Therefore:
Connect trim resistor between
Connect trim resistor between
R
R
TrimDn
TrimDn
Figure 7. Trim Connections To Decrease Output Voltages Using Fixed Resistors
A single resistor connected from the Trim pin (pin 6) to the +Sense (pin 7)
Trim adjustments greater than the specified range can have an adverse
trim pin and −Sense
trim pin and −Sense
(For all models except the UCQ-1.2/40-D24 and -1.2/30-D48)
Where,
   V
V
V
Do not exceed the specified trim range or maximum power ratings
when adjusting trim. Use 1% precision resistors mounted close
to the converter on short leads.
(k Ω) =
(k Ω) =
NOM
OUT
Trim Down
Trim Down
(V
is the desired new output voltage.
is the nominal, untrimmed output voltage.
out
Single Output UCQ Models
(For the UCQ-1.2/40-D24 and -1.2/30-D48)
NOM
5.11
2 − 2
at pins) x (I
5.11

− V
Technical enquiries email: [e-mail], tel:
− 10.22
OUT
Low-Profile, Quarter Brick, 8.3-40 Amp
) / V
Trim Equations
out
NOM
Trim Equations
OUT
) ≥ rated output power

and Sense, in conjunction with trim adjust-
R
R
TrimUp
TrimUp
Connect trim resistor between
(k Ω) =
Isolated DC/DC Converters
(k Ω) =
Connect trim resistor between
trim pin and +Sense
MDC_UCQ Models.B06 Page 11 of 16
trim pin and +Sense
5.11 × V
Trim Up
5.11 × V
Trim Up
1.225 × 
1.225 × 
NOM
NOM
× (1+
× (1+
[phone]
− 5.11

− 10.22