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LM3509 Datasheet(PDF) 3 Page - Texas Instruments

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No. de pieza LM3509
Descripción Electrónicos  High Efficiency Boost for White LEDs
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM3509 Datasheet(HTML) 3 Page - Texas Instruments

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DAP
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2
1
DAP
TOP VIEW
BOTTOM VIEW
2.7V to 5.5V
SW
IN
OVP
MAIN
SUB/FB
SCL
SDA
GND
RESET/GPIO
VIO
SET
RSET
LM3509
R1
R2
OLED
Display
VOLED = 18V
OLED Panel Power Supply
10 PH
1 PF
2.2 PF
CIN
COUT
12 k:
20 mA
40 mA
10 k:
140 k:
10 k:
10 k:
LM3509
www.ti.com
SNVS495D – FEBRUARY 2007 – REVISED MAY 2013
Connection Diagram
Top View
Figure 1. 10-Pin WSON (3mm × 3mm × 0.8mm)
PIN DESCRIPTIONS
Pin
Name
Function
1
MAIN
Main Current Sink Input.
2
SUB/FB
Secondary Current Sink Input or 1.25V Feedback Connection for Constant Voltage Output.
3
SET
LED Current Setting Connection. Connect a resistor from SET to GND to set the maximum LED
current into MAIN or SUB/FB (when in LED mode), where ILED_MAX = 192×1.244V/RSET.
4
VIO
Logic Voltage Level Input
5
RESET/GPIO
Active Low Hardware Reset and Programmable General Purpose I/O.
6
SW
Drain Connection for Internal NMOS Switch
7
OVP
Over-Voltage Protection Sense Connection. Connect OVP to the positive terminal of the output
capacitor.
8
IN
Input Voltage Connection. Connect IN to the input supply, and bypass to GND with a 1µF ceramic
capacitor.
Copyright © 2007–2013, Texas Instruments Incorporated
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