MDC_UEI-15W MURATA [Murata Manufacturing Co., Ltd.], MDC_UEI-15W Datasheet - Page 9

• Manufacturer Part Number: MDC_UEI-15W
• Description: Isolated Wide Input Range 15-Watt DC/DC Converters
• Manufacturer: MURATA [Murata Manufacturing Co., Ltd.]

Trim Equations
tor tolerances and factory-adjusted output accuracy. Mount trim resistor close
to converter. Use short leads.
Remote On/Off Control
On the input side, a remote On/Off Control can be ordered with either polarity.
is pulled high to +V
open pin to rise to +V
voltages (see Specifi cations). Positive-polarity devices are disabled when the
On/Off is grounded or brought to within a low voltage (see Specifi cations) with
respect to –V
Off is grounded or brought to within a low voltage (see Specifi cations) with
respect to –V
pulled high to +15V
signal current when brought low and withstand appropriate voltage when
brought high. Be aware too that there is a fi nite time in milliseconds (see
Specifi cations) between the time of On/Off Control activation and stable,
regulated output. This time will vary slightly with output load type and current
and input conditions.
Where Vo = Desired output voltage. Adjustment accuracy is subject to resis-
Positive: Standard models are enabled when the On/Off pin is left open or
Negative: Optional negative-polarity devices are on (enabled) when the On/
Dynamic control of the On/Off function should be able to sink appropriate
R
R
R
R
T UP
T UP
T UP
T UP
(:) =
(:) =
(:) =
(:) =
IN
IN
Trim and −V
resistor between
.
. The device is off (disabled) when the On/Off is left open or is
<Connect trim
Trim Up
V
12775
V
V
25000
25000
O
V
12775
IN
O
O
DC
– 3.3
O
– 12
– 15
with respect to –V
IN
max. with respect to –V
– 5
. Some models will also turn on at lower intermediate
OUT
>
– 2050
– 2050
– 5110
– 5110
UEI15-033-Q12, Q48
UEI15-050-Q12, Q48
UEI15-120-Q12, Q48
UEI15-150-Q12, Q48
IN
. An internal bias current causes the
R
R
R
R
T DOWN
T DOWN
T DOWN
T DOWN
IN
.
www.murata-ps.com
(:) =
(:) =
(:) =
(:) =
Trim and +V
resistor between
<Connect trim
Trim Down
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
– 2050
– 2050
– 5110
– 5110
put side ONLY. If you must control it from circuits in the output, use some form
of optoisolation to the On/Off Control. This latter condition is unlikely because
the device controlling the On/Off would have to remain powered on and not be
powered from the converter.
carefully observe the voltage levels, the preferred circuit is either an open
drain/open collector transistor, a switch or a relay (which can thereupon be
controlled by logic). The On/Off prefers to be set at +V
ON state, assuming positive logic.
power voltage. Otherwise the converter may be permanently damaged.
Soldering Guidelines
Murata Power Solutions recommends the specifi cations below when installing these
converters. These specifi cations vary depending on the solder type. Exceeding these
specifi cations may cause damage to the product. Be cautious when there is high atmo-
spheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). Your
production environment may differ; therefore please thoroughly review these guidelines
with your process engineers.
For Sn/Ag/Cu based solders:
Maximum Preheat Temperature
Maximum Pot Temperature
Maximum Solder Dwell Time
For Sn/Pb based solders:
Maximum Preheat Temperature
Maximum Pot Temperature
Maximum Solder Dwell Time
Wave Solder Operations for through-hole mounted products (THMT)
There are three CAUTIONs for the On/Off Control:
CAUTION: To retain full output circuit isolation, control the On/Off from the in-
CAUTION: While it is possible to control the On/Off with external logic if you
CAUTION: Do not apply voltages to the On/Off pin when there is no input
Figure 7 – Driving the On/Off Control Pin (suggested circuit)
Isolated Wide Input Range 15-Watt DC/DC Converters
ON/OFF CONTROL
-INPUT
Technical enquiries email: [e-mail], tel:
115° C.
270° C.
7 seconds
105° C.
250° C.
6 seconds
UEI15 Series
MDC_UEI15W.B24 Page 9 of 13
CONTROL
IN
(open pin) for the
+ Vcc
[phone]