UEI15-150-Q48PM-C Murata Power Solutions Inc, UEI15-150-Q48PM-C Datasheet - Page 14

• Manufacturer Part Number: UEI15-150-Q48PM-C
• Description: 18-75Vin, 15Vout, 15W Positive Logic, SMT, RoHS
• Manufacturer: Murata Power Solutions Inc
• Series: UEI15r

Specifications of UEI15-150-Q48PM-C

• Product: Isolated
• Output Power: 16.5 W
• Input Voltage Range: 18 V to 75 V
• Input Voltage (nominal): 48 V
• Number Of Outputs: 1
• Output Voltage (channel 1): 15 V
• Output Current (channel 1): 1.1 A
• Isolation Voltage: 2.25 KV
• Package / Case Size: 0.96 in x 1.1 in x 0.32 in
• Output Type: Isolated DC/DC Converters
• Output Voltage: 15 V
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

reduces the average output current, thereby preventing excessive internal
temperatures. A short circuit can be tolerated indefi nitely.
The Trim input to the converter allows the user to adjust the output voltage
over the rated trim range (please refer to the Specifi cations). In the trim equa-
tions and circuit diagrams that follow, trim adjustments use either a trimpot or
a single fi xed resistor connected between the Trim input and either the positive
or negative output terminals. (On some converters, an external user-supplied
precision DC voltage may also be used for trimming). Trimming resistors should
have a low temperature coeffi cient (±100 ppm/deg.C or less) and be mounted
close to the converter. Keep leads short. If the trim function is not used, leave
the trim unconnected. With no trim, the converter will exhibit its specifi ed
output voltage accuracy.
maximum output voltage OR the maximum output power when setting the trim.
Be particularly careful with a trimpot. If the output voltage is excessive, the
OVP circuit may inadvertantly shut down the converter. If the maximum power
is exceeded, the converter may enter current limiting. If the power is exceeded
for an extended period, the converter may overheat and encounter overtem-
perature shut down.
There are two CAUTIONs to be aware for the Trim input:
CAUTION: To avoid unplanned power down cycles, do not exceed EITHER the
Figure 5. Trim adjustments to decrease Output Voltage using a Fixed Resistor
−INPUT
CONTROL
+INPUT
ON/OFF
−INPUT
CONTROL
+INPUT
ON/OFF
Figure 4. Trim adjustments using a trimpot
+OUTPUT
−OUTPUT
+OUTPUT
−OUTPUT
TRIM
TRIM
R
TRIM DOWN
TURNS
7 5-22
www.murata-ps.com
LOAD
LOAD
input to the converter’s feedback control loop. Excessive electrical noise may
cause instability or oscillation. Keep external connections short to the Trim
input. Use shielding if needed.
tor tolerances and factory-adjusted output accuracy. Mount trim resistor close
to converter. Use short leads.
On the input side, a remote On/Off Control can be ordered with either polarity.
pulled high to +15V max. with respect to –V
lower intermediate voltages (see Specifi cations). Positive-polarity devices are
CAUTION: Be careful of external electrical noise. The Trim input is a senstive
Where Vo = Desired output voltage. Adjustment accuracy is subject to resis-
Positive-polarity models are enabled when the On/Off pin is left open or is
R
R
R
R
Figure 6. Trim adjustments to increase Output Voltage using a Fixed Resistor
T UP
T UP
T UP
T UP
(:) =
(:) =
(:) =
(:) =
Isolated Wide Input Range 15-Watt DC/DC Converters
resistor between
Trim and −V
<Connect trim
−INPUT
CONTROL
+INPUT
ON/OFF
V
V
V
12775
25000
25000
O
12775
V
O
O
– 3.3
O
– 12
– 15
– 5
OUT
>
– 2050
– 2050
– 5110
– 5110
+OUTPUT
−OUTPUT
TRIM
R
R
R
R
T DOWN
T DOWN
T DOWN
T DOWN
IN
R
. Some models will also turn on at
TRIM UP
(:) =
(:) =
(:) =
(:) =
resistor between
Trim and +V
<Connect trim
5110 (Vo - 2.5)
5110 (Vo - 2.5)
10000 (Vo-2.5)
10000 (Vo-2.5)
3.3 – V
12 – V
15 – V
5 – V
OUT
>
O
O
O
O
Page 14 of 16
LOAD
– 2050
– 2050
– 5110
– 5110