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

Specifications subject to change without notice.

VRB_MP-8W

A/1-2009

Page 2 of 2

OUTPUT SPECIFICATIONS

APPLICATION NOTE

Item

Test conditions

Min.

Typ. Max.

Units

Output power

See above products program

8

W

Output voltage accuracy Refer to recommended circuit

±1

±3

Load regulation

From 10% to 100% load

±0.5

±1

Line regulation

Input voltage from low to high, full load

±0.2

±0.5

%

Temperature drift (Vout) Refer to recommended circuit

±0.02

%/

°C

Ripple& Noise

20MHz bandwidth

1%Vo

mVp-p

Switching frequency

100% load, nominal input voltage

300

KHz

TYPICAL CHARACTERISTICS

Operating Temp.(

)

C

Temperature Derating Graph

① Recommended Circuit

All the VRB_MP-8W 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).

DC

DC

Vin

GND

+Vo

0V

C in

Co ut

Single output

(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

can

’t exceed the maximum capacitor load in the list.

② Recommended capacitance

To ensure these series can operate efficiently and

reliably, the recommended capacitance of input and

output sees the below table.

③ No parallel connection or plug and play

Capacitance

Output Voltage

Cout

Cin

Input)

3.3V,5V

220uF

12V,15V

100uF

24V

47uF

100uF

OUTLINE DIMENSIONS & RECOMMENDED FOOTPRINT

32.00 [1.260]

22.86 [0.900]

5.08 [0.200]

2.54 [0.100]

1

11

2,3

14

16

CTRL

22,23

NC

Vin

GND

0V

+Vo

L=530mm[20.866inch] Tube Quantity: 15pcs

L=220mm[8.661inch]

Tube Quantity: 6pcs

∅∅

1.00 [

0.039]

0.50[0.020]

1

11

2

14

16

22

3

23

1

11

2

14

16

22

3

23

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]

(Side View)

(Bottom View)

NC:No connection

Function

11.30 [0.445]

22.70 [0.894]

0.60 [0.024]

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.