WRB4812YD-12W datasheet(2/3 Pages) MICRODC

Part #	WRB4812YD-12W

Description	12W, WIDE INPUT, ISOLATED & REGULATED DUAL&SINGLE OUTPUT DC-DC CONVERTER

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Manufacturer	MICRODC [Microdc power Technology Co., Ltd]

Direct Link	http://www.microdc.cn/

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2 / 3 page

WRA

WRA----

----YD-

YD-

YD-12

12

12W

W

W＆

＆

＆WRB

WRB

WRB----

----YD

YD

YD ----

----12

12

12W

W

W Series

Series

http://www.microdc.cn

Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646

Page 2 of 3

T

TECHNICAL

ECHNICAL

ECHNICAL SPECIFICATION

SPECIFICATION

SPECIFICATION(All

(All

(All specifications

specifications

specifications are

are

are typical

typical

typical at

at

at nominal

nominal

nominal input,full

input,full

input,full load

load

load and

and

and 25

25

25℃

℃

℃ otherwise

otherwise

otherwise noted)

noted)

Output

Output Specifications

Specifications

Output power

12Watts,max.

Voltage accuracy

±1.2%

Minimum load

0%

Line regulation

LL to HL at Full Load

Single

±0.2%

Dual

±0.5%

Load regulation

No Load to Full Load

Single(DIP)

±0.5%

Dual (DIP)

±1%

(2.5Vo only)

±1%

Cross regulation(Dual)

Asymmetrical load 25%/100% FL

±5%

Ripple and noise

20MHz bandwidth

See table

Temperature coefficient

±0.02%/℃,max.

Transient response recovery time 25% load step change

250

Over voltage protection

zener diode clamp(only

single)

2.5VDC output

3.3VDC output

5.1VDC output

12VDC output

15VDC output

3.9VDC

6.2VDC

15VDC

18VDC

Over load protection

% of FL at nominal input

150%

Short circuit protection

Continuous,automatics recovery

Input

Input Specifications

Specifications

Input voltage range

12VDC nominal input

9-18VDC

24VDC nominal input

18-36VDC

48VDC nominal input

36-72VDC

Input filter

Pi type

Input surge voltage

12VDC input

36VDC 100mS,max

24VDC input

50VDC 100mS,max

48VDC input

100VDC 100mS,max

Input reflected ripple current

20mAp-p

Start up time

Nominal input and

power up

450mS

constant resistive load

Start-up voltage

12VDC input

9VDC

24VDC input

18VDC

48VDC input

36VDC

Shutdown voltage

12VDC input

8VDC

24VDC input

16VDC

48VDC input

33VDC

Remote ON/OFF4

DC-DC ON

Open or 3.0V<Vr<12V

(Positive logic)

DC-DC-OFF

Short or 0V<Vr<1.2V

Input current of remote control pin

Nominal input

-0.5mA ~ 0.5mA

Remote off state input current

Nominal input

2.5mA

General

General Specifications

Specifications

Efficiency

See table

Isolation voltage

Input to Output

1500VDC,min. 1minute

Isolation resistance

109 ohms,min.

Isolation capacitance

1200pF, max.

Switching frequency

400KHz ± 10%

Approvals and standard

IEC60950-1,UL60950-1,EN60950-1

Case material

Nickel-coated copper

Base material

Non-conductive black plastic

Potting material

Epoxy (UL94-V0)

Dimensions

1.25 X 0.80 X 0.40 Inch

(31.8 X 20.3 X 10.2 mm)

Weight

18g(0.62oz)

MTBF1

MIL-HDBK-217F

7.575x105 hrs

Environmental

Environmental Specifications

Specifications

Operating ambient temperature

-40℃ ~ +85℃ (with derating)

Maximum case temperature

100℃

Storage temperature range

-55℃ ~ +105℃

Thermal impedance

Nature convection

20℃/Watt

Thermal shock

MIL-STD-810F

Vibration

MIL-STD-810F

Relative humidity

5% to 95% RH

EMC

EMC Characteristics

Characteristics

EMI5

EN55022

Class A

ESD

EN61000-4-2

Air ± 8KV

perf.Criteria A

Contact ± 6KV

Radiated immunity

EN61000-4-3

10V/m

perf.Criteria A

Fast transient6

EN61000-4-4

± 2KV

perf.Criteria A

Surge6

EN61000-4-5

± 1KV

perf.Criteria A

Conducted immunity

EN61000-4-5

10 Vr.m.s

perf.Criteria A

Recommended EMI Filter

Recommended Filter for EN55022 Class B Compliance

Recommended EMI Filter

Recommended EN55022 Class B Filter Circuit Layout

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WRB4812YD-12W Datasheet(PDF) 2 Page - Microdc power Technology Co., Ltd

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