UCH-3.3/10-D24P-C Murata Power Solutions Inc, UCH-3.3/10-D24P-C Datasheet - Page 14

• Manufacturer Part Number: UCH-3.3/10-D24P-C
• Description: DC/DC Converters & Regulators 3.3Vout 10A 33W 24Vin Pos Polarity
• Manufacturer: Murata Power Solutions Inc
• Series: UCHr

Specifications of UCH-3.3/10-D24P-C

• Output Power: 33 W
• Input Voltage Range: 18 V to 36 V
• Output Voltage (channel 1): 3.3 V
• Output Current (channel 1): 10 A
• Isolation Voltage: 2.25 KV
• Product: Isolated
• Input Voltage (nominal): 24 V
• Number Of Outputs: 1
• Package / Case Size: C61
• Output Type: Isolated Single
• Output Voltage: 3.3 V
• Package / Case: C61
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

On the input side, a remote On/Off Control can be ordered with either polarity.
is pulled high to +Vin with respect to –Vin. An internal bias current causes
the open pin to rise to approximately +15V. Some models will also turn on at
lower intermediate 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 –Vin.
Off is grounded or brought to within a low voltage (see Specifi cations) with
respect to –Vin. The device is off (disabled) when the On/Off is left open or is
pulled high to approximately +15V with respect to –Vin.
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.
you 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) returned to negative Vin.
power voltage. Otherwise the converter may be permanently damaged.
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
There are several CAUTIONs for the On/Off Control:
While it is possible to control the On/Off with external logic if
Do not apply voltages to the On/Off pin when there is no input
www.murata-ps.com
These converters do not require external capacitance added to achieve rated
specifi cations. Users should only consider adding capacitance to reduce switch-
ing noise and/or to handle spike current step loads. Install only enough ca-
pacitance to achieve noise objectives. Excess external capacitance may cause
regulation problems, slower transient response and possible instability. Proper
wiring of the Sense inputs will improve these factors under capacitive load.
capacitor installed immediately adjacent to the converter. Any extended output
wiring or smaller wire gauge or less ground plane may tolerate somewhat high-
er capacitance. Also, capacitors with higher ESR may use a larger capacitance.
Murata Power Solutions offers several variations of our core product family.
These products are available under scheduled quantity orders and may also
include separate manufacturing documentation from a mutually-agreeable
Product Specifi cation. Since these product adaptations largely share a common
parts list, similar specifi cations and test methods with their root products, they
are provided at excellent costs and delivery. Please contact MPS for details.
added, 3.68mm pin length, and RoHS-5 hazardous substance compliance (with
lead).
The maximum rated output capacitance and ESR specifi cation is given for a
As of this date, the following products are available:
UCH-3.3/30-D48NBHL2-Y
UCH-5/10-D48NBHL2-Y
UCH-3.3/15-D48NBHL2-Y
UCH-3.3/35-D24NBHL2-Y
These are all negative On/Off polarity, baseplate installed, conformal coating
1.8−15V Output DC/DC Converters
Isolated, “Half-Brick”
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