XP POWER RDF25 Series 5W Bottom Cooling DC-DC Converter

XP POWER RDF25 Series 5W Bottom Cooling DC-DC Converter

The RDF25 Series delivers 25W and offers single output voltages ranging from 5V to 24V. With an ultra-wide 10:1 input range of 16 to 160VDC, which covers standard industrial voltages and meets all requirements of the EN50155 transportation standard.

With world-wide industrial safety approvals and compliance to transportation standards, high efficiency, high reliability, 3kVAC isolation, remote on/offand wide output trimming, the RDF25 series benefits system designers with easy integration into a wide range of applications including; renewable energy, battery systems, autonomous equipment, factory automation and harsh railway applications.

Features

• Single voltage outputs from 5V to 24VDC

• Wide output voltage trim and remote sense

• 10:1 ultra-wide input range 16 to 160VDC

• Industry standard half brick format

• High efficiency, up to 85%

• 3kVAC reinforced input to output isolation

• ITE safety approvals and EN50155 compliance

• Remote On/Offwith low 15mA stand-by current

• -40°C to +100°C operating temperature

• Overvoltage, overload, and short circuit protection

Application Notes

Input Fusing and Safety Considerations

The RDF25 series converters have no internal fuse. In order to achieve maximum safety and system protection, always use an input line fuse. We recommended a 3A time delay fuse. It is recommended that the circuit has a transient voltage suppressor diode (TVS) across the input terminals to protect the unit against surge or spike voltages and input reverse voltage (as shown).

Output Voltage Adjustment

The trim input permits the user to adjust the output voltage up by 10% or down by 10%. This is accomplished by connecting an external resistor between the Trim pin and either the +Vout pin or the -Vout pin.

To Trim Down

Connecting an external resistor (Rd) between the Trim pin and the +Vout pin decreases the output voltage. The following table can be used to determine the required external resistor value to obtain a percentage output voltage change of Δ%. +

To Trim Up 1 +Vin

Connecting an external resistor (Ru) between the Trim pin and the -Sense pin increases the output voltage. The following table can be used to determine the required external resistor value to obtain a percentage output voltage change of Δ%. 3 Ctrl Load

Electrical parameter details

(1) Input parameters

Characteristic specification remarks

Input voltage range 16-160VDC 10:1 ultra wide range, covering standard industrial voltages

Measurement under nominal input voltage with no-load input current of 10mA

When the standby current 3mA module is disabled

Input filtering Pi type filtering suppresses input interference

Input protection requires external 3A delay fuse+TVS tube surge protection and reverse voltage protection

(2) Output parameters

Model Output Voltage Output Current Maximum Capacitive Load Efficiency

RDF2572S05 5VDC 5.0A 6800µF 85%

RDF2572S12 12VDC 2.08A 1000µF 84%

RDF2572S15 15VDC 1.67A 820µF 85%

RDF2572S24 24VDC 1.04A 470µF 85%

Voltage fine-tuning with ± 10% external resistance to achieve voltage rise and fall-

Temperature coefficient 0.02%/° C, output voltage stability-

Overvoltage protection with 120% Vnom Zener diode clamp and automatic recovery-

(3) General and reliability parameters

Characteristic specification remarks

Input output isolation 3000VDC (60s) basic isolation

Under the condition of isolation resistance ≥ 10 ΩΩ 3kVDC

Isolation capacitor 2000pF-

Switching frequency 250kHz-

Power density 28W/in ³-

Mean Time Between Failures (MTBF) 230khrs MIL-HDBK-217F,+25 ° C GB

Weight standard 36g, with radiator 47g-

Environment and Compliance

(1) Environmental adaptability

Basis for environmental condition specification standards

Working temperature -40 ° C to+100 ° C-

Storage temperature complies with IEC/EN 60068-2-1-

Humidity 95% RH non condensing

Working altitude 5000m-

Shock and vibration comply with IEC/EN 61373, suitable for transportation and industrial environments

Dry heat/humid heat in accordance with IEC/EN 60068-2-2/30-

(2) Compliance and Certification

Certification Type Standards/Directive Key Requirements

Safety certification EN50155, CE, UKCA railway and general safety compliance

EMC emission EN50121-3-2 conduction+radiation compliance

EMC Immunity EN50121-3-2 Conducted Immunity 10Vrms, Static ± 2kV

Welding compliance IPC JEDEC J-STD 020D. 1 up to 260 ° C for 10 seconds

Function and Usage Instructions

(1) Core functions

Remote switch: high level (3.0-12.0VDC) on, low level (0-1.2VDC) off, control pin3 to be suspended when not in use

Fine tuning of output voltage:

Boosting: Trim pin and - Vout indirect resistor Ru (refer to the selection table in the document)

Voltage reduction: Trim pin and+Vout indirect resistor Rd (refer to the document table for selection)

Protection mechanism: overvoltage (Zener clamp), overload (current limit), short circuit (automatic recovery)

(2) Installation and selection

Heat sink: Optional model with suffix "- HK" added to enhance heat dissipation capability in high temperature environments

Input configuration: An external 3A delay fuse and TVS tube must be connected to prevent damage from surges and reverse voltages