OM5448TR Hendon Semiconductors, OM5448TR Datasheet - Page 11

• 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

9.5
Earlier application circuits have
shown single LED drive. However the
OM5448 is also suitable for driving
multiple LEDs in either series or
2007 May 28, Revision 1.0
Series and parallel LED
connection
Fig.10 OM5448 LED drive circuit with switched light level using the R
Fig.11 Series and parallel LED drive using the OM5448
parallel connection. Figure 11 shows
the OM5448 driving four LEDs in a
series/parallel combination.
With parallel connection, current
sharing can be forced by including a
small series resistor with each LED
11
Low Voltage LED Driver
(see figure 12), but in this circuit
below it has been found that the slope
of current vs voltage for the forward
biased LED ensures sufficient
matching of the parallel LEDs for the
intended application.
and Boost Converter
SETI
input.
Product Specification
OM5448