OM5448TR Hendon Semiconductors, OM5448TR Datasheet - Page 15

• Manufacturer Part Number: OM5448TR
• Description: LED Drivers 1-3.5V 1W LED Boost Driver
• Manufacturer: Hendon Semiconductors

Specifications of OM5448TR

• Operating Supply Voltage: 1 V to 3.5 V
• Maximum Supply Current: 1.7 mA
• Maximum Power Dissipation: 200 mW
• Maximum Operating Temperature: 85 C
• Package / Case: SO-23-5
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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