LM3502SQ-25 National Semiconductor, LM3502SQ-25 Datasheet - Page 9
![IC LED DRIVR WHITE BCKLGT 16-LLP](/photos/6/68/66869/pkg_sqa16a_sml.jpg)
LM3502SQ-25
Manufacturer Part Number
LM3502SQ-25
Description
IC LED DRIVR WHITE BCKLGT 16-LLP
Manufacturer
National Semiconductor
Series
PowerWise®r
Type
Backlight, White LEDr
Datasheet
1.LM3502SQ-35NOPB.pdf
(18 pages)
Specifications of LM3502SQ-25
Topology
PWM, Step-Up (Boost)
Number Of Outputs
2
Internal Driver
Yes
Type - Primary
Backlight
Type - Secondary
White LED
Frequency
800kHz ~ 1.2MHz
Voltage - Supply
2.5 V ~ 5.5 V
Voltage - Output
23 V ~ 24 V
Mounting Type
Surface Mount
Package / Case
16-LLP
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
600mA
Internal Switch(s)
Yes
Efficiency
80%
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
LM3502SQ-25TR
Typical Performance Characteristics
Efficiency: η = P
10 LED Efficiency vs LED Current
OUT
I
Q
I
(Non-Switching) vs V
/P
Q
IN
(Switching) vs V
= [(V
OUT
– V
Fb
IN
) * I
IN
OUT
]/[V
20131711
20131709
20131707
IN
* I
IN
]. T
A
= 25˚C, unless otherwise stated.)
( Circuit in Figure 1: L = DO1608C-223 and D = MBRM140T3.
9
Switching Frequency vs Temperature
8 LED Efficiency vs LED Current
I
Q
(Switching) vs Temperature
20131710
20131712
20131708
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