KDC_NNL10C.D03 Page 3 of 8

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NNL10 Series

Non-Isolated DC/DC Converters

APPLICATION NOTES (continued)

Remote Sense

The remote sense function compensates for voltage drops from the output of the NNL10 to the

load point by regulating the output voltage at the load point. The voltage drop must not exceed

0.5V, although Trim and remote sense functions can be used in combination with each other, the

maximum voltage increase is 0.5V.

When increasing the output voltage the maximum output power of the NNL10 must not exceed

the maximum output figures stated in the selection guide.

Output Sequencing

To simplify output sequencing, the NNL10 series offers

an optional single wire interconnection that performs this

function. Using this connection, up to four devices can

be ‘daisy chained’ together, with the ‘DC OK’ signal from

one converter signifying that the next converter can be

enabled. A capacitor, simply connected to the daisy chain

link, provides a settable delay in the sequence of the

converters starting.

Typical capacitor values and corresponding delays are

shown in the table below.

Figure 3 shows a typical sequencing configuration, along

with the voltage outputs that it produces. As well as

reducing component count, making use of the ‘built-in’

sequencing capability means that only a single PCB track

is required for a full sequencing solution.

Capacitor

Delay

0.22μF

1.8ms

0.22μF

0.6ms

Common

LOAD

SENSE

NNL10

Fig.3

RoHS COMPLIANCE INFORMATION

This series is compatible with RoHS soldering systems with a peak reflow solder temperature of 245ºC. The pin termination finish on this product

series is Matte Tin over Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems. This series has a Moisture Sensitivity

Level (MSL) 2.

For further information, please visit www.murata-ps.com/rohs

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