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LM3643A Arkusz danych(PDF) 3 Page - Texas Instruments

Numer części LM3643A
Szczegółowy opis  Synchronous Boost Dual LED Flash Driver with 1.5-A High-Side Current Sources
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

LM3643A Arkusz danych(HTML) 3 Page - Texas Instruments

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background image
Top View
A1
A2
B1
B2
B3
Top View
A3
C2
C1
C3
D2
D3
D1
Pin A1
LM3643, LM3643A
www.ti.com
SNVS967A – AUGUST 2014 – REVISED NOVEMBER 2014
7 Pin Configuration and Functions
DSBGA
12 Pins
Pin Functions
PIN
DESCRIPTION
NUMBER
NAME
A1
GND
Ground
Input voltage connection. Connect IN to the input supply and bypass to GND with a 10-µF or larger
A2
IN
ceramic capacitor.
A3
SDA
Serial data input/output in the I2C Mode on LM3643.
B1
SW
Drain Connection for Internal NMOS and Synchronous PMOS Switches.
Active high hardware flash enable. Drive STROBE high to turn on Flash pulse. Internal pulldown
B2
STROBE
resistor of 300 k
Ω between STROBE and GND.
B3
SCL
Serial clock input for LM3643.
C1
OUT
Step-up DC/DC Converter Output. Connect a 10-µF ceramic capacitor between this terminal and GND.
Active high enable pin. High = Standby, Low = Shutdown/Reset. Internal pulldown resistor of 300 k
C2
HWEN
between HWEN and GND.
C3
TORCH/TEMP
Torch terminal input or threshold detector for NTC temperature sensing and current scale back.
D1
LED2
High-side current source output for flash LED.
Configurable dual polarity power amplifier synchronization input. Internal pulldown resistor of 300 k
D2
TX
between TX and GND.
D3
LED1
High-side current source output for flash LED.
Copyright © 2014, Texas Instruments Incorporated
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Product Folder Links: LM3643 LM3643A


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