PR4404 datasheet(3/12 Pages) PREMA

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LED Driver PR4404

Performance

PROPERTIES OF UTILIZED LEDs

This datasheet presents characteristics for

different typical applications:

Supply voltage 1...2 V

Target current 100 mA - one LED

Supply voltage 1...2 V

Target current 150 mA - one LED

Supply voltage 1.5...3 V

Target current 300 mA - one LED

Supply voltage 2...5 V

Target current 200 mA - two LEDs in series

A and B are typical single battery-cell

applications, C for two, and D for three cells.

The behaviour at many other operating

conditions can be estimated by interpolation or

extrapolation.

Note that in the following diagrams the peak

current through the output switch exceeds the

maximum rating. Also the power dissipation

can cause a junction temperature higher than

the maximum rating under some operating

conditions. These data should give an

impression of the performance over the whole

set of parameters, but the fact that they are

shown here should not be regarded as an

approval for operation under these conditions.

ABSOLUTE MAXIMUM RATINGS

Parameter

Min

Max

Units

VCC (no damage)

-0.3

[V]

SW output peak

current

1.5

[A]

Operating junction

temperature

-20

125

[°C]

Storage Temperature

Range

-55

150

[°C]

Electrostatic Discharge

(ESD) Protection

[kV]

TEST CIRCUIT

C1a: 1 µF ceramic

C1b: 100 µF tantalum

L1: Würth WE-PD XS series;

inductance see diagrams

D1: MBRS140

Rs: see diagrams

C2a: 1 µF ceramic

C2b: 100 µF tantalum

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