The copyright and authority for the interpretation of the products are reserved by MORNSUN

Specifications subject to change without notice.

VFA_YMD-5W & VFB_YMD-5W

B/1-2012

Page 2 of 2

OUTPUT SPECIFICATIONS

APPLICATION NOTE

Item

Test Conditions

Min.

Typ.

Max.

Units

Recommended Circuit

All the VFA_YMD-5W & VFB_YMD-5W Series

have been tested according to the following

recommended testing circuit before leaving factory.

This series should be tested under load. Never be

tested under no load (see Figure 1).

Vin

GND

+Vo

0V

Cin

Cout

Vin

GND

+Vo

0V

Cin

Cout

DC

DC

-Vo

Cout

Dual Output

Single Output

DC

DC

(Figure 1)

If you want to further decrease the output ripple,

you can increase capacitance properly or choose

capacitors with low ESR. However, the capacitance

should not be too high.(Table 1).

External Capacitor Table(Table 1)

Capacitance

Output

Voltage

Cout

Cin(12V,24V,

48V input)

Single

5V

220µF

100µF

12V,15V,

100µF

24V

47µF

Dual

±5V

±100µF

±12V,±15V

±47µF

Output power

See product program

0.5

--

5

W

Positive voltage accuracy

Refer to recommended circuit

--

±1

±3

%

Negative voltage accuracy

Refer to recommended circuit

--

±3

±5

Load regulation

From 10% to 100% load

--

±0.5

±1*

Line regulation(at full load)

Input voltage from low to high

--

±0.2

±0.5

Temperature drift (Vout)

Refer to recommended circuit

--

0.02

--

%/°C

Ripple**

20MHz bandwidth

--

30

50

mVp-p

Noise**

20MHz bandwidth

--

75

150

Switching frequency

100% load, input voltage range

--

300

--

KHz

*Dual output models unbalanced load: ±5%.

**Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power

Converter section, application notes.

TYPICAL CHARECTERISTICS

Operating Temp.( )

C

Temperature Derating Graph

OUTLINE DIMENSIONS & FOOTPRINT DETAILS

25.40 [1.000]

20.32 [0.800]

5.08 [0.200]

1

3

2

4

5

No Pin

Vin

GND

-Vo

+Vo

0V

Vin

GND

0V

+Vo

∅1.30 [0.051]

3

4

5

2

1

∅0.80[0.031]

3

4

5

2

1

L=530mm[20.866inch] Tube Quantity: 19pcs

L=220mm[8.661inch]

Tube Quantity: 7pcs

Pin

FOOTPRINT DETAILS

Note:

Unit:mm[inch]

Pin diameter tolerances:±0.10mm[±0.004inch]

General tolerances:±0.25mm[±0.010inch]

MECHANICAL DIMENSIONS

RECOMMENDED FOOTPRINT

TUBE OUTLINE DIMENSIONS

Note:

Unit :mm[inch]

General tolerances: ±0.50mm[±0.020inch]

(Front View)

Single

Dual

DUAL

3

5

2

1

SINGLE

Note grid 2.54*2.54mm

:

.

Short tube inner package dimensions: L*W*H= 255*170*80mm

Short tube outer package dimensions(with six inner package boxes):

L*W*H= 375*280*270mm

Long tube inner package dimensions: L*W*H= 580*200*100mm

Long tube outer package dimensions(with two inner package boxes):

L*W*H= 600*215*220mm

Long tube outer package dimensions(with three inner package boxes):

L*W*H= 600*215*325mm

(Bottom View)

30.30 [1.193]

12.30 [0.484]

Note:

1. All specifications measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified.

2. In this datasheet, all the test methods of indications are based on corporate standards.

3.

Only typical models listed, other models may be different, please contact our technical person for more details.