URF4848QB-75WHR3 - Mornsun America

DC/DC Converter

URF48_QB-75W(F/H)R3 Series

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75W isolated DC-DC converter

Wide input voltage and regulated single output

Patent Protection RoHS

FEATURES

Ultra-wide 4:1 input voltage range

High efficiency up to 93%

I/O isolation test voltage: 2250VDC

Input under-voltage protection, output short

circuit, over-current, over–voltage,

over-temperature protection

Operating ambient temperature range: -40℃

~ +85℃

Five-sided metal shielded package

EN62368 approved

Meet UL62368, IEC62368, EN50155 standards

Industry standard ¼-Brick package and

pin-out

URF48_QB-75W(F/H)R3 series of isolated 75W DC-DC converter products with a 4:1 input voltage range. They feature efficiencies of up to

93%, 2250VDC input to output isolation, operating ambient temperature of -40℃to +85℃, input under-voltage, output over-voltage, short

circuit, over-temperature and over-current protection. The products meet CLASS B of CISPR32/EN55032 EMI standards by adding the

recommended external components, and they are widely used in applications such as battery powered systems, industrial controls,

electricity, instrumentation, railway, communication and intelligent robotics.

Selection Guide

Certification

Part No.①

Input Voltage (VDC)

Output

Full Load

Efficiency (%)

Min./Typ.

Capacitive

Load (µF)

Max.

Nominal

(Range)

Max.②

Voltage

(VDC)

Current (A)

Max.

URF4805QB-75W(F/H) R3

(18-75)

89/91

6000

URF4812QB-75W(F/H) R3

6.25

90/92

2000

URF4815QB-75W(F/H) R3

91/93

2000

URF4824QB-75W(F/H) R3

3.13

90/92

1000

URF4848QB-75W(F/H) R3

1.56

90/92

470

Note:

①Use“F”suffix is for added aluminum baseplate and “H” suffix for heat sink mounting. We recommend to choose modules with a heat sink for enhanced heat

dissipation and applications with extreme temperature requirements;

②Exceeding the maximum input voltage may cause permanent damage.

Input Specifications

Item

Operating Conditions

Min.

Typ.

Max.

Unit

Input Current (full load/no-load)

Nominal input voltage

1698/50

1756/80

Reflected Ripple Current

Nominal input voltage

Surge Voltage (1sec. max.)

-0.7

VDC

Start-up Voltage

Input Under-voltage Protection

5VDC, 15VDC output

16.5

Others

15.5

Input Filter

Pi filter

Ctrl*

Module on

Ctrl pin open or pulled high (3.5-12VDC)

Module off

Ctrl pin pulled low to GND (0-1.2VDC)

DC/DC Converter

URF48_QB-75W(F/H)R3 Series

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Ctrl*

Input current when off

Hot Plug

Unavailable

Note: *The Ctrl pin voltage is referenced to input GND.

Output Specifications

Item

Operating Conditions

Min.

Typ.

Max.

Unit

Voltage Accuracy

0%-100% load

±1

±3

Linear Regulation

Input voltage variation from low to high at full load

±0.2

±0.5

Load Regulation

0%-100% load

±0.5

±0.75

Transient Recovery Time

25% load step change

200

500

µs

Transient Response Deviation

25% load step change

5VDC output

±3

±7.5

Others

±3

±5

Temperature Coefficient

Full load

±0.03

%/℃

Ripple & Noise*

20MHz bandwidth

12VDC, 15VDC output

100

200

mVp-p

Others

150

250

Over-voltage Protection

Input voltage range

110

130

160

%Vo

Over-current Protection

110

140

190

%Io

Short-circuit Protection

Hiccup, continuous, self-recovery

Note: * The “parallel cable” method is used for ripple and noise test, please see

DC-DC Converter Application Notes

for specific operation.

General Specifications

Item

Operating Conditions

Min.

Typ.

Max.

Unit

Isolation

Input-output

Electric Strength Test for 1

minute with a leakage

current of 5mA max.

2250

VDC

Input-case

1500

Output-case

500

Insulation Resistance

Input-output resistance at 500VDC

100

MΩ

Isolation Capacitance

Input-output capacitance at 100KHz/0.1V

2200

Trim Range*

110

%Vo

Remote Sense Compensation

105

Operating Temperature

-40

+85

℃

Storage Temperature

-55

+125

Over-temperature Protection

Max. case temperature

115

120

Pin Soldering Resistance

Temperature

Wave-soldering, 10 seconds

260

Soldering spot is 1.5mm away from case for 10 seconds

300

Storage Humidity

Non-condensing

%RH

Vibration

IEC/EN61373 - Category 1, Grade B

Switching Frequency

PWM mode

250

KHz

MTBF

MIL-HDBK-217F@25℃

500

K hours

Note:*For URF4805QB-75W(F/H)R3 and URF4815QB-75W(F/H)R3, the Trim function satisfies the output up to 10% or the Sense function satisfies the output up to 5%,

Vin needs to be higher than 20VDC.

Mechanical Specifications

Case Material

Aluminum alloy case; Black plastic bottom, flame-retardant and heat-resistant (UL94 V-0)

Dimensions

URF48xxQB-75WR3

61.8 × 40.2 × 12.7 mm

URF48xxQB-75WFR3

62.0 × 56.0 × 14.6 mm

URF48xxQB-75WHR3

61.8 × 40.2 × 27.7 mm

Weight

URF48xxQB-75WR3

90.0g(Typ.)

URF48xxQB-75WFR3

110.0g(Typ.)

DC/DC Converter

URF48_QB-75W(F/H)R3 Series

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Weight

URF48xxQB-75WHR3

121.0g(Typ.)

Cooling method

Natural convection (20FLM)

Typical Performance Curves

Electromagnetic Compatibility (EMC)

Emissions

CISPR32/EN55032 CLASS A and CLASS B (see Fig. 3 for recommended circuit)

Immunity

ESD

IEC/EN61000-4-2, EN50121-3-2 Contact ±6KV Air ±8KV

perf.Criteria B

IEC/EN61000-4-3, EN50121-3-2 10V/m

perf.Criteria A

EFT

IEC/EN61000-4-4, EN50121-3-2 ±2KV(see Fig. 2 for recommended circuit)

perf.Criteria A

Surge

EN50121-3-2

differential mode ±1KV, 1.2/50us, source impedance 42Ω

(see Fig.2 for recommended circuit)

perf.Criteria B

IEC/EN61000-4-6, EN50121-3-2 10 Vr.m.s

perf.Criteria A

DC/DC Converter

URF48_QB-75W(F/H)R3 Series

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Notes：

(1) Product application thermal design should be referred to the recommended PCB layout and recommended heat dissipation structure, please see DC-DC

Converter Application Notes for specific operation.

Remote Sense Application

1. Remote Sense Connection if not used

(1) If the sense function is not used for remote regulation the user must connect the +Sense to + Vo and -Sense to 0V at the DC-DC

converter pins and will compensate for voltage drop across pins only.

(2) The connections between Sense lines and their respective power lines must be kept as short as possible, otherwise they may be picking

up noise, interference and/or causing unstable operation of the power module.

2. Remote Sense Connection used for Compensation

(1) Using remote sense with long wires may cause unstable output, please contact technical support if long wires must be used.

(2) PCB-tracks or cables/wires for Remote Sense must be kept as short as possible. Twisted pair or shielded wairs are suggested for remote

compensation and must be kept as short as possible.

(3) We recommend using adequate cross section for PCB-track layout and/or cables to connect the power supply module to the load in

order to keep the voltage drop below 0.3V and to make sure the power supply's output voltage remains within the specified range.

(4) Note that large wire impedance may cause oscillation of the output voltage and/or increased ripple. Consult technical support or

factory for further advice of sense operation.

DC/DC Converter

URF48_QB-75W(F/H)R3 Series

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Design Reference

1. Typical application

(1) We recommended using the recommended circuit shown in Fig.1 during product testing and application, otherwise please ensure that at

least a 220μF electrolytic capacitors is connected at the input in order to ensure adequate voltage surge suppression and protection.

(2) We recommended increasing the value of Cin and pay attention to the unstable input voltage if the product input side is paralleled with

motor drive circuit and/or larger energy transient circuits, to ensure the stablity of input terminal and avoid repeatedly start-up problems due

to input voltage lower than under-voltage protection point.

(3) We recommended increasing the output capacitance with limited to the capactive load specification and/or increasing the voltage

clamping circuit(such as TVS) if the output terminal is inductive device such as relay or a motor, to ensure adequate voltage surge

suppression and protection.

(4) Input and/or output ripple can be further reduced by appropriately increasing the input & output capacitor values Cin and Cout and/or

by selecting capacitors with a low ESR (equivalent series resistance). Also make sure that the capacitance is not exceeding the specified

max. capacitive load value of the product.

Fig.1

Note:

*Please pay attention to the ambient temperature of the product when using

an external capacitor, increase the electrolytic capacitor values to at least 1.5

times the original parameter if the ambient temperature is low(such as -25℃).

Vout(VDC)

Fuse

Cin*

Cout

TVS

10A,

slow blow

220µF

470µF

SMDJ6.0A

220µF

SMDJ14A

SMDJ17A

100µF

SMDJ28A

SMDJ54A

2. EMC solution-recommended circuit

We suggest to use the recommended circuit shown in Fig.2 during product EMC testing and application.

Fig. 2

Capacitor

Recommended value

Function

150µF electrolytic

Meets EFT and

surge

47µF electrolytic

Vin

GND

CY2

CY 4

LOAD

C5 L 2

Vin

GND

DC/DC

+Vo

C2 C3 C4 C6 C7 C8

CY 3

CY1

Fig. 3

DC/DC Converter

URF48_QB-75W(F/H)R3 Series

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Class A components

Class B components

Recommended component value

function

150μF electrolytic capacitor

Meets

conducted

emission and

radiated

emission

47μF electrolytic capacitor

150μF electrolytic capacitor

47μF electrolytic capacitor

C2, C3, C4, C5, C6, C7, C8

2.2μF ceramic capacitor

1.0mH common mode inductor

1.5μH inductance

CY3

CY1, CY2, CY3, CY4

1nF Y1 safety capacitor

3. Trim Function for Output Voltage Adjustment (open if unused)

Vref

Trim

Vo’

Vref

Trim

Vo’

Trim up Trim down

TRIM resistor connection (dashed line shows internal resistor network)

Calculation formula of Trim resistance:

up: a= Vref

Vo’-Vref R1

R =TaR2

R -a2-R3

down: a= Vref

Vo’-Vref R2

R =TaR1

R -a1-R3

RT= Trim Resistor value; a = self-defined parameter

Vo’= desired output voltage (±10% max.)

Note: If the Trim pin is shorted with “+Vo”, or its value is too low, then the output voltage Vo’ would be lower than 0.95Vo, which may cause

permanent damage.

Vout(VDC)

R1(KΩ)

R2(KΩ)

R3(KΩ)

Vref(V)

3.036

2.5

11.00

2.87

2.5

14.03

2.8

2.5

24.872

2.87

2.5

53.017

2.913

2.5

4. Reflected ripple current--test circuit

+ Vo

Cin DC

Oscilloscope

Lin

Note: Lin(4.7μH), Cin (220μF, ESR < 1.0Ωat 100 KHz)

5. The products do not support parallel connection of their output

6. Ensure input current meet start-up current of the products, ensuring that the product is not underpower

7. For additional information please refer to application notes on www.mornsun-power.com

DC/DC Converter

URF48_QB-75W(F/H)R3 Series

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URF48xxQB-75WR3 Dimensions and Recommended Layout

URF48xxQB-75WFR3 Dimensions and Recommended Layout

DC/DC Converter

URF48_QB-75W(F/H)R3 Series

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URF48xxQB-75WHR3 Dimensions and Recommended Layout

Note:

1. For additional information on Product Packaging please refer to www.mornsun-power.com. Packaging bag number:

58010113(URF48xxQB-75WR3), 58200069(URF48xxQB-75WFR3), 58220017(URF48xxQB-75WHR3);

2. The maximum capacitive load offered were tested at input voltage range and full load;

3. Unless otherwise specified, data in this datasheet should be tested under the conditions of Ta=25℃, humidity<75%RH with nominal input

voltage and rated load;

4. All index testing methods in this datasheet are based on our company corporate standards;

5. We can provide product customization service, please contact our technicians directly for specific information;

6. Products are related to laws and regulations: see "Features" and "EMC";

7. Our products shall be classified according to ISO14001 and related environmental laws and regulations, and shall be handled by qualified

units.

Mornsun Guangzhou Science & Technology Co., Ltd.

Address: No. 5, Kehui St. 1, Kehui Development Center, Science Ave., Guangzhou Science City, Huangpu District, Guangzhou, P. R. China

Tel: 86-20-38601850 Fax: 86-20-38601272 E-mail:info@mornsun.cn www.mornsun-power.com