DNS10SMD06 datasheet(6/15 Pages) DELTA

Part #	DNS10SMD06

Description	Surface mount packaging

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Manufacturer	DELTA [Delta Electronics, Inc.]

Direct Link	http://www.deltaww.com

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DS_DNS10SMD06_05252012

6

TEST CONFIGURATIONS

VI(+)

VI(-)

BATTERY

2 100uF

Tantalum

L

TO OSCILLOSCOPE

Note: Input reflected-ripple current is measured with a

simulated

source

inductance.

Current

is

measured at the input of the module.

Figure 17: Input reflected-ripple test setup

Vo

GND

COPPER STRIP

10uF

tantalum

1uF

ceramic

SCOPE

Resistive

Load

Note: Use a 10μF tantalum and 1μF capacitor. Scope

measurement should be made using a BNC

connector.

Figure 18: Peak-peak output noise and startup transient

measurement test setup

SUPPLY

I

VI

Vo

GND

Io

LOAD

CONTACT AND

DISTRIBUTION LOSSES

CONTACT RESISTANCE

Figure 19: Output voltage and efficiency measurement test

setup

Note: All measurements are taken at the module

terminals. When the module is not soldered (via

socket), place Kelvin connections at module

terminals to avoid measurement errors due to

contact resistance.

%

100

)

(





Ii

Vi

Io

Vo



DESIGN CONSIDERATIONS

Input Source Impedance

To maintain low-noise and ripple at the input voltage, it is

critical to use low ESR capacitors at the input to the

module. Figure 20 shows the input ripple voltage

(mVp-p) for various output models using 2x47 uF low

ESR tantalum capacitors (SANYO P/N:16TPB470M,

47uF/16V or equivalent) and 2x22 uF very low ESR

ceramic

capacitors

(TDK

P/N:C3225X7S1C226MT,

22uF/16V or equivalent).

The input capacitance should be able to handle an AC

ripple current of at least:

Arms

Vin

Vout

Vin

Vout

Iout

Irms











 



1

0

50

100

150

200

250

300

0

1

2

3

4

5

6

Output Voltage (Vdc)

Tantalum

Ceramic

Figure 20: Input ripple voltage for various Output models,

Io = 6A (Cin = 2x47uF tantalum capacitors and

2x22uF ceramic capacitors at the input)

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