UHE-1.2/10000-D12NR-C Murata Power Solutions Inc, UHE-1.2/10000-D12NR-C Datasheet - Page 12
![DC/DC TH 10A 12-1.2V XHE](/photos/17/93/179345/uhe12-30w_sml.jpg)
UHE-1.2/10000-D12NR-C
Manufacturer Part Number
UHE-1.2/10000-D12NR-C
Description
DC/DC TH 10A 12-1.2V XHE
Manufacturer
Murata Power Solutions Inc
Series
UHEr
Datasheet
1.UHE-122500-Q12-C.pdf
(16 pages)
Specifications of UHE-1.2/10000-D12NR-C
Product
Isolated
Output Power
12 W
Input Voltage Range
9 V to 18 V
Input Voltage (nominal)
12 V
Number Of Outputs
1
Output Voltage (channel 1)
1.2 V
Output Current (channel 1)
10 A
Isolation Voltage
1.5 KV
Package / Case Size
1.6 in X 2 in
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. Fuses should also be
used if the possibility of sustained, non-current-limited, input-voltage polarity
reversals exists. For MPS’s UHE 12-30 Watt DC/DC Converters, you should use
slow-blow type fuses, installed in the ungrounded input supply line, with values
no greater than the following.
All relevant national and international safety standards and regulations must be
observed by the installer. For system safety agency approvals, the converters
must be installed in compliance with the requirements of the end-use safety
standard, e.g. IEC/EN/UL60950-1.
Input Voltage:
On/Off Control (pin 4) Max. Voltages
Input Reverse-Polarity Protection
Output Current
Case Temperature
Storage Temperature
Lead Temperature (soldering, 10 sec.)
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in
the Performance/Functional Specifi cations Table is not implied.
T E C H N I C A L
Continuous:
Transient (100msec):
Referenced to –Input (pin 2)
Model
Output/Input
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
5 V
12 V
15 V
D12 Models
D24/Q12 Models
D48/Q48 Models
D12 Models
D24/Q12 Models
D48/Q48 Models
No Suffi x
"N" Suffi x
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
Absolute Maximum Ratings
N O T E S
D12
--
--
3
4
5
5
6
6
Q12
7.5
--
--
--
--
Fuse Values in Amps
5
3
3
23 Volts
42 Volts
81 Volts
25 Volts
50 Volts
100 Volts
+15 Volts
+7 Volts
Current must be <5 Amps. Brief
duration only. Fusing recommended.
Current limited. Devices can
withstand sustained output short
circuits without damage.
+100°C
–55 to +125°C
See soldering specifi cations
D24
2.5
2.5
2
2
3
3
-
-
Q48
--
--
--
--
3
3
5
5
www.murata-ps.com
D48
1.5
1
1
1
1
2
2
2
Input Undervoltage Shutdown and Start-Up Threshold
Under normal start-up conditions, devices will not begin to regulate until
the ramping-up input voltage exceeds the Start-Up Threshold Voltage. Once
operating, devices will not turn off until the input voltage drops below the
Undervoltage Shutdown limit. Subsequent re-start will not occur until the input
is brought back up to the Start-Up Threshold. This built in hysteresis prevents
any unstable on/off situations from occurring at a single input voltage.
Start-Up Time
The V
the ramping input voltage crosses the Start-Up Threshold and the fully loaded
output voltage enters and remains within its specifi ed accuracy band. Actual
measured times will vary with input source impedance, external input/output
capacitance, and load. The UHE Series implements a soft start circuit that limits
the duty cycle of its PWM controller at power up, thereby limiting the input
inrush current.
nominal input voltage applied but is turned off via the On/Off Control pin. The
specifi cation defi nes the interval between the point at which the converter is
turned on and the fully loaded output voltage enters and remains within its
specifi ed accuracy band. Similar to the V
to V
external load capacitance.
V
Input Overvoltage Shutdown
All D12/Q12 and D24 Models of the UHE DC/DC converters are equipped with
Input Overvoltage Protection. Input voltages exceeding the input overvoltage
shutdown specifi cation listed in the Performance/Functional Specifi cations will
cause the device to shutdown. A built-in hysteresis for all models will not allow
the converter to restart until the input voltage is suffi ciently reduced.
of requirements for withstanding brief input surges to 100V for up to 100μsec
without output voltage interruption.
models enabled.
Input Source Impedance
UHE converters must be driven from a low ac-impedance input source. The
DC/DC's performance and stability can be compromised by the use of highly
inductive source impedances. The input circuit shown in Figure 2 is a practical
solution that can be used to minimize the effects of inductance in the input
traces. For optimum performance, components should be mounted close to
the DC/DC converter. If the application has a high source impedance, low V
models can benefi t of increased external input capacitance.
I/O Filtering, Input Ripple Current, and Output Noise
All models in the UHE 12-30 Watt DC/DC Converters are tested/specifi ed for in-
put refl ected ripple current and output noise using the specifi ed external input/
output components/circuits and layout as shown in the following two fi gures.
elements, minimizing line voltage variations caused by transient IR drops
OUT
The On/Off Control to V
The difference in start up time from V
All 48V
Please contact MPS to have input overvoltage shutdown for D48/Q48
External input capacitors (C
OUT
is therefore insignifi cant.
IN
start-up time is also governed by the internal soft start circuitry and
to V
IN
OUT
models have this overvoltage shutdown function disabled because
Start-Up Time is the interval of time between the point at which
2-10 Amp, 12-30 Watt DC/DC Converters
28 Mar 2011 MDC_UHE_12-30W Series.B16 Page 12 of 16
OUT
start-up time assumes the converter has its
IN
Isolated, High Effi ciency, 1.6" × 2"
in Figure 2) serve primarily as energy-storage
IN
IN
to V
to V
OUT
OUT
email: sales@murata-ps.com
and from On/Off Control to
start-up, the On/Off Control
UHE Series
IN