LM3509SDX National Semiconductor Corporation, LM3509SDX Datasheet - Page 6

• Manufacturer Part Number: LM3509SDX
• Description: High Efficiency Boost For White Led S And/or Oled Displays With Dual Current Sinks And I2c Compatible Brightness Control
• Manufacturer: National Semiconductor Corporation

www.national.com
Typical Performance Characteristics
Mode), C
I
SUB
(L = TDK VLF3012AT-100MR49, R
+ I
MAIN
OUT
, T
= 2.2µF (OLED Mode), C
A
= +25°C unless otherwise specified.
10 LED Efficiency vs I
6 LED Efficiency vs I
LED Efficiency vs V
(2 Strings of 5LEDs)
(2 Strings of 3LEDs)
L
IN
= 0.36Ω, I
= 1µF, L = TDK VLF4012AT-100MR79, (R
LED
IN
LED
30004308
30004310
30004357
LED
= 40mA)
6
V
IN
(L = TDK VLF5014AT-100MR92, R
= 3.6V, LEDs are OSRAM (LW M67C), C
L
8 LED Efficiency vs I
4 LED Efficiency vs I
= 0.3Ω), R
LED Efficiency vs V
(2 Strings of 4LEDs)
(2 Strings of 2LEDs)
SET
= 8.06kΩ, UNI = '1', I
L
= 0.2Ω, I
LED
LED
IN
OUT
30004358
30004309
30004311
LED
= 1µF (LED
= 60mA)
LED
=