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LM3555TLX/NOPB Datasheet(PDF) 3 Page - Texas Instruments

Part # LM3555TLX/NOPB
Description  LM3555 Synchronous Boost Converter With 500-mA High-Side LED Driver and Dual-Mode Control Interface
PDF  37 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM3555TLX/NOPB Datasheet(HTML) 3 Page - Texas Instruments

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A3
B3
C3
D3
A2
B2
C2
D2
A1
B1
C1
D1
A1
B1
C1
D1
A2
B2
C2
D2
A3
B3
C3
D3
3
LM3555
www.ti.com
SNVS594G – DECEMBER 2008 – REVISED APRIL 2016
Product Folder Links: LM3555
Submit Documentation Feedback
Copyright © 2008–2016, Texas Instruments Incorporated
5 Pin Configuration and Functions
YZR Package
12-Pin DSBGA
Top View
YZR Package
12-Pin DSBGA
Bottom View
Pin Functions
PIN
I/O
DESCRIPTION
NUMBER
NAME
A1
PGND
—
Power ground
A2
SGND
—
Signal ground
A3
VIN
I
Input voltage pin of the device. Connect input bypass capacitor very close to this pin.
B1
SW
—
Inductor connection
B2
TORCH
I
Torch pin. Driving this pin high enables torch mode.
B3
IND
O
Red indicator LED current source. Connect to RED LED anode
C1
VOUT
O
Boost output. Connect output bypass capacitor very close to this pin
C2
STROBE
I/O
Strobe signal input pin to synchronize flash pulse in I2C mode. This signal usually comes
from the camera processor. In simple logic mode this pin, when tied to a voltage rail
through a pullup resistor indicates the number of LEDs in the system.
C3
I2C / EN
I
I2C / EN-logic selection. High = I2C mode, Low = simple logic mode.
D1
VLED
O
LED current source. Connect to the anode of the flash LED. One or two LEDs can be
connected in series.
D2
SDA / EN2
I/O
EN2 signal pin in simple logic mode. I2C data signal in I2C mode.
D3
SCL / EN1
I
EN1 signal pin in simple logic mode. I2C clock signal in I2C mode.



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