om5448 Hendon Semiconductors, om5448 Datasheet - Page 15

• Manufacturer Part Number: om5448
• Description: Low Voltage Led Driver And Boost Converter
• Manufacturer: Hendon Semiconductors

9.8
The variation of LED current with
temperature is shown in figure 17.
2007 May 28, Revision 1.0
LED Current (mA)
-50
LED drive temperature
sensitivity
-25
Fig.17 LED current against temperature. White LED, circuit figure 4.
40.0
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
0
The increase in LED current with
increasing temperature provides
compensation for any reduction in
light output, and the ability to see the
LED light in hotter environments, as
T e mp e r a t u r e vs O u t p u t C u r re n t
25
Whit e LED cur r ent , 2.4V supply
T e m p e r a t ur e ( de g C )
50
15
75
Whit e LED cur rent , 1.2V Supply
Low Voltage LED Driver
100
well as tracking the lower output
provided by cold batteries.
and Boost Converter
125
Product Specification
OM5448
150